chore: Define common IUniqueID member impls in interface

Taking advantage of nifty new language feats
build (refactor): Organize py classes a bit
2023-08-22 11:35:41 -04:00 · 2023-08-22 11:35:41 -04:00 · 2023-08-22 11:35:41 -04:00 · 2023-08-22 11:35:41 -04:00 · 2023-08-22 11:35:41 -04:00 · 2023-08-22 01:29:45 -04:00
732 changed files with 2231 additions and 78436 deletions
@@ -55,5 +55,3 @@ trace_data/
 **/CMakeDeps.cmake
 **/CMakeDeps_win.cmake
 **/devcontainer.json
-*.Generated.cs
-*.lst
@@ -1,6 +1,3 @@
 [submodule "externals"]
 	path = externals
 	url = git@bitbucket.org:bluetradesys/externals.git
-[submodule "vcpkg"]
-	path = vcpkg
-	url = https://github.com/microsoft/vcpkg.git
@@ -36,6 +36,29 @@ if(BUILD_API_SERVER)
 endif()

 if(WIN32)
+  # flags
+  set(
+    CMAKE_CXX_FLAGS
+    "${CMAKE_CXX_FLAGS} \
+    /MP \
+    /WX /wd4251 /wd4250 /wd4251 /wd4244 /wd4267 /wd4355 /wd4275 /wd4345 \
+    /bigobj \
+    /DCURL_STATICLIB \
+    /D_WINSOCK_DEPRECATED_NO_WARNINGS \
+    /D__TBB_NO_IMPLICIT_LINKAGE \
+    /DBOOST_ALL_NO_LIB \
+    /std:c++20 \
+    /D_SCL_SECURE_NO_WARNINGS /D_CRT_SECURE_NO_WARNINGS /D_WIN32_WINNT=0x0600")
+  set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} /MTd")
+  set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_DEBUG} /MT")
+  set(
+    CMAKE_SHARED_LINKER_FLAGS_RELEASE
+    "${CMAKE_SHARED_LINKER_FLAGS_RELEASE} \
+    /DEBUG \
+    /OPT:REF \
+    /OPT:ICF \
+    /LTCG")
+
  add_compile_definitions(SHARED_MEMORY_PREFIX="spark")
  add_compile_definitions(APP_DATA_DIR="\$\{APPDATA\}/bts/")
  # subdirs
@@ -119,6 +142,42 @@ else()
  if (BUILD_ADMIN_WEB_APP)
    add_subdirectory(src/Spark.Admin.WebApp)
  endif()
+  if (BUILD_API_SERVER)
+    set(_cs_source_dirs
+      spark_api
+      spark_api_server
+      spark_core
+      spark_websocket)
+    foreach(cs_source_dir IN LISTS _cs_source_dirs)
+      file(GLOB cs_source_dir "${CMAKE_SOURCE_DIR}/src/client/${cs_source_dir}/*.cs")
+      list(APPEND _api_server_sources ${cs_source_dir})
+    endforeach()
+
+    list(APPEND _api_server_sources
+      ${CMAKE_SOURCE_DIR}/src/client/spark_api/spark_api.csproj
+      ${CMAKE_SOURCE_DIR}/src/client/spark_api_server/spark_api_server.csproj
+      ${CMAKE_SOURCE_DIR}/src/client/spark_core/spark_core.csproj
+      ${CMAKE_SOURCE_DIR}/src/client/spark_websocket/spark_websocket.csproj)
+
+    set(_out_dir ${CMAKE_BINARY_DIR}/$<CONFIG>)
+    set(_api_server_dlls
+      ${CMAKE_BINARY_DIR}/$<CONFIG>/bin/net7.0/spark_api.dll
+      ${CMAKE_BINARY_DIR}/$<CONFIG>/bin/net7.0/spark_core.dll
+      ${CMAKE_BINARY_DIR}/$<CONFIG>/bin/net7.0/spark_websocket.dll
+      ${CMAKE_BINARY_DIR}/$<CONFIG>/bin/net7.0/spark_api_server)
+    add_custom_command(
+      OUTPUT ${_api_server_dlls}
+      COMMAND dotnet build ${CMAKE_SOURCE_DIR}/Spark.Api.Server.sln --verbosity minimal --configuration $<CONFIG>
+      COMMENT "Building Spark.Api.Server.sln"
+      DEPENDS ${_api_server_sources})
+    add_custom_command(
+      OUTPUT
+      ${CMAKE_BINARY_DIR}/$<CONFIG>/bin/net7.0/libspark.so
+      COMMAND ln -sf ARGS ${CMAKE_BINARY_DIR}/src/lib/$<CONFIG>/libspark.so ${CMAKE_BINARY_DIR}/$<CONFIG>/bin/net7.0
+      COMMENT "Symlink libspark to api server bins"
+      DEPENDS ${_api_server_dlls})
+    add_custom_target(websocket_api_layout ALL DEPENDS ${CMAKE_BINARY_DIR}/$<CONFIG>/bin/net7.0/libspark.so)
+  endif()
  if(BUILD_DOCS)
    add_subdirectory(doc/user)
  endif()
@@ -151,6 +210,7 @@ else()
      FILES
      "${SPARK_LIB}/libACE-5.7.5.so"
      "${SPARK_LIB}/libOnixS.IceImpactMulticastPriceFeedHandlerCpp.so.3.16.0.0"
+      "${CMAKE_SOURCE_DIR}/externals/src/emumba/sparkd.lic"
      DESTINATION "${SPARK_INSTALL_PREFIX}/bin")
  endif()
 endif()
@@ -26,11 +26,8 @@
        "CMAKE_CXX_STANDARD": "20",
        "CMAKE_SHARED_LINKER_FLAGS_DEBUG": "/DEBUG",
        "CMAKE_SHARED_LINKER_FLAGS_RELEASE": "/OPT:REF /OPT:ICF /LTCG",
-        "CMAKE_TOOLCHAIN_FILE": "${sourceDir}/vcpkg/scripts/buildsystems/vcpkg.cmake",
        "EXTERNALS_ROOT": "${sourceDir}/externals/windows",
-        "CONFIG_DEFAULTS_PATH": "config/profiles/default/*.conf",
-        "DOTNET_BINARY_DIR": "${sourceDir}/build/$<CONFIG>/bin/net7.0",
-        "DOTNET_WINDOWS_BINARY_DIR": "${sourceDir}/build/$<CONFIG>/bin/net7.0-windows"
+        "CONFIG_DEFAULTS_PATH": "config/profiles/default/*.conf"
      }
    },

@@ -150,6 +147,7 @@

    {
      "name": "spark-api-server-base",
+      "inherits": "spark",
      "hidden": true,
      "binaryDir": "${sourceDir}/build/${presetName}",
      "cacheVariables": {
@@ -157,47 +155,38 @@
          "type": "bool",
          "value": "ON"
        },
-        "CONFIG_DEFAULTS_PATH": "config/profiles/md_dev/*.conf;config/profiles/default/*.conf"
+        "DOTNET_BINARY_DIR": "${sourceDir}/build/$<CONFIG>/bin/net7.0",
+        "DOTNET_WINDOWS_BINARY_DIR": "${sourceDir}/build/$<CONFIG>/bin/net7.0-windows"
      }
    },

    {
      "name": "spark-api-server-windows",
-      "inherits": "spark",
+      "inherits": "spark-api-server-base",
      "displayName": "Spark Api Server",
-      "cacheVariables": {
-        "BUILD_API_SERVER": {
-          "type": "bool",
-          "value": "ON"
-        }
-      }
+      "condition": {
+        "type": "equals",
+        "lhs": "${hostSystemName}",
+        "rhs": "Windows"
+      },
+      "generator": "Visual Studio 17 2022"
    },

    {
      "name": "spark-api-server-linux",
-      "inherits": "sparkd",
+      "inherits": "spark-api-server-base",
      "displayName": "Spark Api Server",
+      "condition": {
+        "type": "equals",
+        "lhs": "${hostSystemName}",
+        "rhs": "Linux"
+      },
      "generator": "Ninja Multi-Config",
      "cacheVariables": {
        "BUILD_ADMIN_WEB_APP": {
          "type": "BOOL",
          "value": "OFF"
-        },
-        "BUILD_API_SERVER": {
-          "type": "bool",
-          "value": "ON"
-        },
-        "BUILD_SPARKD": {
-          "type": "BOOL",
-          "value": "OFF"
-        },
-        "CMAKE_C_COMPILER": "clang",
-        "CMAKE_CXX_COMPILER": "clang++",
-        "CMAKE_CXX_FLAGS_DEBUG": "-g -fPIC -Wall -pedantic -Wextra -Werror -Wno-missing-braces -Wno-ignored-qualifiers --std=c++20 -fdiagnostics-color -DDEBUG",
-        "CMAKE_CXX_FLAGS_RELEASE": "-fPIC -Wall -pedantic -Wextra -Werror -Wno-missing-braces -Wno-ignored-qualifiers --std=c++20 -fdiagnostics-color -fno-omit-frame-pointer -DNDEBUG -O3",
-        "CMAKE_INSTALL_PREFIX": "${sourceDir}/install/${presetName}",
-        "CONFIG_DEFAULTS_PATH": "config/profiles/default/*.conf",
-        "DOTNET_BINARY_DIR": "${sourceDir}/build/$<CONFIG>/bin/net7.0"
+        }
      }
    },

@@ -217,17 +206,6 @@
      "cacheVariables": {
        "CCAPI_LOG_LEVEL": "Trace"
      }
-    },
-
-    {
-      "name": "data-stream-suite",
-      "inherits": "spark",
-      "displayName": "Data Stream Suite",
-      "description": "Data Stream utils ported over from Edge",
-      "binaryDir": "${sourceDir}/build/${presetName}",
-      "cacheVariables": {
-        "CONFIG_DEFAULTS_PATH": "config/profiles/default/*.conf;config/profiles/data_stream/*.conf"
-      }
    }
  ],

@@ -368,20 +346,6 @@
      "configurePreset": "sparkd-ccapi-diag",
      "displayName": "Debug (ccapi diag)",
      "inherits": "sparkd"
-    },
-
-    {
-      "name": "data-stream-suite-debug",
-      "displayName": "DataStreamSuite (Debug)",
-      "configurePreset": "data-stream-suite",
-      "configuration": "Debug"
-    },
-
-    {
-      "name": "data-stream-suite-release",
-      "displayName": "DataStreamSuite (Release)",
-      "configurePreset": "data-stream-suite",
-      "configuration": "Release"
    }
  ]
 }
@@ -5,7 +5,6 @@
 [clangd ext]: https://marketplace.visualstudio.com/items?itemName=llvm-vs-code-extensions.vscode-clangd
 [dotnet]: https://dotnet.microsoft.com/en-us/download/dotnet
 [ninja build]: https://ninja-build.org/
-[ninja generator]: https://cmake.org/cmake/help/latest/generator/Ninja.html
 [ninja multi-config generator]: https://cmake.org/cmake/help/latest/generator/Ninja%20Multi-Config.html
 [python]: https://www.python.org/
 [py venv]: https://docs.python.org/3/library/venv.html
@@ -87,6 +86,7 @@
 * **[CMake][cmake]** (version >= 3.23)
 * **[Ninja Build][ninja build]**
 * **[Python][python]** (version >= 3.9)
+* **[Docker][docker]**

 ### **References**
 * **[CMakePresets][cmake presets]**
@@ -178,7 +178,6 @@
 # Build Spark Api Server on Linux
 ### **Dependencies**
 * **[CMake][cmake]** (version >= 3.23)
-* **[Ninja Build][ninja build]**
 * **[Python][python]** (version >= 3.9)
 * **[Dotnet][dotnet]** (sdk version >= 7.0.0)

@@ -1,98 +1,66 @@
-FROM ubuntu:latest
+FROM ubuntu:22.10

-ARG DEBIAN_FRONTEND=noninteractive
-ENV TZ=America/New_York
-
-# light deps (should be quick to download/install)
-RUN apt-get update && apt-get install -y \
-    ca-certificates \
-    curl \
-    gnupg \
-    liblttng-ust-dev \
-    libpcap0.8-dev \
-    locales \
-    ninja-build \
-    software-properties-common \
-    sqlite3 \
-    tzdata
-
-# clang
-RUN apt-get update && apt-get install -y \
+RUN \
+    apt-get update \
+    && DEBIAN_FRONTEND=noninteractive apt-get install -y \
    clang-13 \
    clang-format-13 \
    clangd-13 \
    clang-15 \
    clang-format-15 \
-    clangd-15
-
-# g++
-RUN apt-get update && apt-get install -y \
+    clangd-15 \
+    cmake \
+    curl \
+    dotnet7 \
+    fish \
    g++-11 \
-    g++-12
-
-# python
-RUN apt-get update && apt-get install -y \
+    g++-12 \
+    gnupg \
+    liblttng-ust-dev \
+    libssh2-1-dev \
+    libpcap0.8-dev \
+    locales \
+    ninja-build \
+    nodejs \
+    npm \
+    openssh-server \
    python3-pip \
    python3-venv \
-    && python3 -m pip install --upgrade pip
+    rapidjson-dev \
+    software-properties-common \
+    sqlite3 \
+    sudo \
+    tar \
+    vim \
+    wget

-# dotnet
-RUN apt-get update && apt-get install -y \
-    dotnet7
-
-# ssh
-RUN apt-get update && apt-get install -y \
-    libssh2-1-dev \
-    openssh-server
-
-# cmake
+# this is done here so that ccache sees clang++ installed, not clang-10
 RUN \
-    curl -fsSL https://apt.kitware.com/keys/kitware-archive-latest.asc 2> /dev/null \
-    | gpg --dearmor - | tee /etc/apt/trusted.gpg.d/kitware.gpg > /dev/null \
-    && apt-add-repository "deb https://apt.kitware.com/ubuntu/ $(lsb_release -cs) main" \
-    && apt-get update \
-    && apt-get install -y cmake
+    apt-get update \
+    && DEBIAN_FRONTEND=noninteractive apt-get install -y ccache 

-# node
-ARG node_major=18
-RUN mkdir -p /etc/apt/keyrings \
-    && curl -fsSL https://deb.nodesource.com/gpgkey/nodesource-repo.gpg.key \
-    | gpg --dearmor -o /etc/apt/keyrings/nodesource.gpg \
-    && echo "deb [signed-by=/etc/apt/keyrings/nodesource.gpg] https://deb.nodesource.com/node_$node_major.x nodistro main" \
-    | tee /etc/apt/sources.list.d/nodesource.list \
-    && apt-get update \
-    && apt-get install -y nodejs
-
-# ccache is done here so that ccache sees clang++ installed, not clang-10
-RUN apt-get update && apt-get install -y \
-    ccache 
-
-# emumba (light deps)
-RUN apt-get update && apt-get install -y \
+# emumba deps
+RUN \
+    apt-get update \
+    && DEBIAN_FRONTEND=noninteractive apt-get install -y \
+    tzdata \
    build-essential \
+    cmake-curses-gui \
+    git-all \
    doxygen \
    python3-sphinx \
    graphviz \
    libgtest-dev \
    libssl-dev \
-    rapidjson-dev \
-    zlib1g-dev \
-    pkg-config
-
-# emumba (boost)
-RUN apt-get update && apt-get install -y \
    libboost-filesystem-dev \
    libboost-program-options-dev \
    libboost-test-dev \
-    libboost-date-time-dev
-
-# dev utils
-RUN apt-get update && apt-get install -y \ 
-    fish \
-    git-all \
-    sudo \
-    vim \
-    wget
+    libboost-date-time-dev \
+    zlib1g-dev \
+    netcat-traditional \
+    net-tools \
+    gdb gdbserver \
+    pkg-config

 # set up default executables (update-alternatives)
 RUN \
@@ -55,7 +55,7 @@ then select your container in the dropdown
 3. Push the new image to Docker Hub

   ```
-   docker push bluetradingsystems/sparkd-dev:latest
+   docker push johncolvin/bluetradingsystems:sparkd-dev
   ```
   ***Note:** The image doesn't have to be on Docker Hub, we can simply build
   it from scratch on our local machines (with the Dockerfile). However, this
@@ -1,6 +0,0 @@
-cd ~/spark/build/clang/debug/; cmake --build . --target install; rm -rf ~/spark/install/Debug/bin.zip; tar -zcvf  ~/spark/install/Debug/bin.zip ~/spark/install/Debug/bin; scp ~/spark/install/Debug/bin.zip bts@10.1.10.31:~/13000/; cd ~/spark/
-cd ~/13000/; tar -xf bin.zip; mv home/bts/spark/install/Debug/bin/* sparkbin/; rm -rf ~/13000/home/; docker container stop spark_13000; docker container start spark_13000
-cd ~/13000/; tar -xf bin.zip; mv home/bts/spark/install/Debug/bin/* sparkbin/; rm -rf ~/13000/home/; cp -r sparkbin ~/.sparkd-dev/mounts/sparkd_build/; 
-ES SECURITYTYPE_FUTURE at VENUE_GLBX
-./sparkd md dump --symbol ES --type future --venue glbx --platform mdp3onixsex
-BT5u53r
@@ -1,9 +1,11 @@
-Microsoft Visual Studio Solution File, Format Version 12.00
+Microsoft Visual Studio Solution File, Format Version 12.00
 # Visual Studio Version 17
 VisualStudioVersion = 17.3.32922.545
 MinimumVisualStudioVersion = 15.0.26124.0
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "spark_api", "src\client\spark_api\spark_api.csproj", "{DC9A8975-8211-4FC9-A9BA-C8B9D26AD481}"
 EndProject
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "libspark", "build\src\lib\libspark.vcxproj", "{FDC3A021-386E-3A2C-A7EB-CBE94A95BE25}"
+EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Spark", "src\client\spark\Spark.csproj", "{9A4D4D07-1AB6-4B2B-B111-A4F34D6C267E}"
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Spark.Console", "src\client\Spark.Console\Spark.Console.csproj", "{387566C6-C6F6-412C-A30C-9855BBCB4816}"
@@ -11,6 +13,9 @@ EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "spark_core", "src\client\spark_core\spark_core.csproj", "{6E449EB6-20AC-4FA6-B8D9-10F4BB7E1FEE}"
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "spark_sdk", "src\client\spark_sdk\spark_sdk.csproj", "{6963C314-83C4-4667-B0D0-C2F7AE208C29}"
+	ProjectSection(ProjectDependencies) = postProject
+		{FDC3A021-386E-3A2C-A7EB-CBE94A95BE25} = {FDC3A021-386E-3A2C-A7EB-CBE94A95BE25}
+	EndProjectSection
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "spark_test", "src\client\spark_test\spark_test.csproj", "{ECD78CC5-138F-4809-A764-2358C2AC2E82}"
 EndProject
@@ -34,6 +39,14 @@ Global
 		{DC9A8975-8211-4FC9-A9BA-C8B9D26AD481}.Release|x64.Build.0 = Release|x64
 		{DC9A8975-8211-4FC9-A9BA-C8B9D26AD481}.RelWithDebInfo|x64.ActiveCfg = Release|x64
 		{DC9A8975-8211-4FC9-A9BA-C8B9D26AD481}.RelWithDebInfo|x64.Build.0 = Release|x64
+		{FDC3A021-386E-3A2C-A7EB-CBE94A95BE25}.Debug|x64.ActiveCfg = Debug|x64
+		{FDC3A021-386E-3A2C-A7EB-CBE94A95BE25}.Debug|x64.Build.0 = Debug|x64
+		{FDC3A021-386E-3A2C-A7EB-CBE94A95BE25}.MinSizeRel|x64.ActiveCfg = MinSizeRel|x64
+		{FDC3A021-386E-3A2C-A7EB-CBE94A95BE25}.MinSizeRel|x64.Build.0 = MinSizeRel|x64
+		{FDC3A021-386E-3A2C-A7EB-CBE94A95BE25}.Release|x64.ActiveCfg = Release|x64
+		{FDC3A021-386E-3A2C-A7EB-CBE94A95BE25}.Release|x64.Build.0 = Release|x64
+		{FDC3A021-386E-3A2C-A7EB-CBE94A95BE25}.RelWithDebInfo|x64.ActiveCfg = RelWithDebInfo|x64
+		{FDC3A021-386E-3A2C-A7EB-CBE94A95BE25}.RelWithDebInfo|x64.Build.0 = RelWithDebInfo|x64
 		{9A4D4D07-1AB6-4B2B-B111-A4F34D6C267E}.Debug|x64.ActiveCfg = Debug|x64
 		{9A4D4D07-1AB6-4B2B-B111-A4F34D6C267E}.Debug|x64.Build.0 = Debug|x64
 		{9A4D4D07-1AB6-4B2B-B111-A4F34D6C267E}.MinSizeRel|x64.ActiveCfg = Release|x64
@@ -1,37 +0,0 @@
-namespace Bts.ArithmeticExpressions;
-
-using System.Numerics;
-
-class AdditiveInverse : IArithmeticExpression<double> {
-   readonly IArithmeticExpression expression;
-
-   public AdditiveInverse(IArithmeticExpression expression) =>
-      this.expression = expression;
-
-   public static AdditiveInverse<T> Create<T>(IArithmeticExpression<T> expression)
-      where T : INumber<T> =>
-      new(expression);
-
-   public double Evaluate(IDictionary<string, object?> env) =>
-      -evaluateArg(expression, nameof(expression), env);
-
-   static double evaluateArg(
-      IArithmeticExpression expr, string name, IDictionary<string, object?> env) {
-      var obj = expr.Evaluate(env);
-      return ConvertUtils.try_convert(expr.Evaluate(env), out double dbl) ? dbl :
-         throw new Exception(
-            $"Invalid AdditiveInverse. {name} is of type {obj?.GetType()} " +
-            $"(expected {typeof(double)})");
-   }
-}
-
-class AdditiveInverse<T> : IArithmeticExpression<T>
-   where T : INumber<T> {
-   readonly IArithmeticExpression<T> expression;
-
-   public AdditiveInverse(IArithmeticExpression<T> expression) =>
-      this.expression = expression;
-
-   public T Evaluate(IDictionary<string, object?> env) =>
-      -expression.Evaluate(env);
-}
@@ -1,45 +0,0 @@
-namespace Bts.ArithmeticExpressions;
-
-using System.Numerics;
-
-public static class ArithmeticExpressionExtensions {
-   public static IArithmeticExpression<TResult> Add<TLeft, TRight, TResult>(
-      this IArithmeticExpression<TLeft> left, IArithmeticExpression<TRight> right)
-      where TLeft :
-         INumber<TLeft>,
-         IAdditionOperators<TLeft, TRight, TResult>
-      where TRight : INumber<TRight>
-      where TResult : INumber<TResult> =>
-      new Sum<TLeft, TRight, TResult>(left, right);
-
-   public static IArithmeticExpression<TResult> Subtract<TLeft, TRight, TResult>(
-      this IArithmeticExpression<TLeft> left, IArithmeticExpression<TRight> right)
-      where TLeft :
-         INumber<TLeft>,
-         ISubtractionOperators<TLeft, TRight, TResult>
-      where TRight : INumber<TRight>
-      where TResult : INumber<TResult> =>
-      new Difference<TLeft, TRight, TResult>(left, right);
-
-   public static IArithmeticExpression<TResult> Multiply<TLeft, TRight, TResult>(
-      this IArithmeticExpression<TLeft> left, IArithmeticExpression<TRight> right)
-      where TLeft :
-         INumber<TLeft>,
-         IMultiplyOperators<TLeft, TRight, TResult>
-      where TRight : INumber<TRight>
-      where TResult : INumber<TResult> =>
-      new Product<TLeft, TRight, TResult>(left, right);
-
-   public static IArithmeticExpression<TResult> Divide<TLeft, TRight, TResult>(
-      this IArithmeticExpression<TLeft> left, IArithmeticExpression<TRight> right)
-      where TLeft :
-         INumber<TLeft>,
-         IDivisionOperators<TLeft, TRight, TResult>
-      where TRight : INumber<TRight>
-      where TResult : INumber<TResult> =>
-      new Quotient<TLeft, TRight, TResult>(left, right);
-
-   public static IArithmeticExpression<T> Negate<T>(this IArithmeticExpression<T> expression)
-      where T : INumber<T> =>
-      new AdditiveInverse<T>(expression);
-}
@@ -1,99 +0,0 @@
-%namespace Bts.ArithmeticExpressions
-%partial
-%visibility internal
-%tokentype Token
-%parsertype ArithmeticExpressionParserImpl
-
-%union {
-   public int Integer;
-   public double Real;
-   public string Identifier;
-   public DateTime DateTime; 
-   public ImmutableList<IArithmeticExpression> Arguments;
-   public ImmutableList<Assignment> Assignments;
-   public IArithmeticExpression Argument;
-   public Assignment Assignment;
-   public ArithmeticProgram Program;
-}
-
-/* Constants  */
-%token INTEGER_CONSTANT REAL_CONSTANT
-/* Arithmetic Operators */
-%token ADD, SUBTRACT, MULTIPLY, DIVIDE, EQUALS
-/* Syntax */
-%token PARENTHESIS_OPEN, PARENTHESIS_CLOSE, COMMA, IDENTIFIER
-
-%left ADD SUBTRACT
-%left MULTIPLY DIVIDE
-%nonassoc EQUALS
-
-%type <Argument> Argument
-%type <Arguments> Arguments
-%type <Assignment> Assignment
-%type <Assignments> Assignments
-%type <Program> Program
-
-%%
-
-Program :
-   Assignments {
-      $$ = new($1);
-   }
-   ;
-
-Assignments :
-   Assignment {
-      $$ = ImmutableList<Assignment>.Empty.Add($1);
-   }
-   | Assignments Assignment {
-      $$ = $1.Add($2);
-   }
-   ;
-
-Assignment :
-   IDENTIFIER EQUALS Argument {
-      $$ = new($1.Identifier, $3);
-   }
-   ;
-
-Argument :
-   IDENTIFIER PARENTHESIS_OPEN Arguments PARENTHESIS_CLOSE {
-      $$ = new Function($1.Identifier, $3);
-   }
-   | INTEGER_CONSTANT {
-      $$ = new IntegerConstant($1.Integer);
-   }
-   | REAL_CONSTANT {
-      $$ = new RealConstant($1.Real);
-   }
-   | IDENTIFIER {
-      $$ = new Variable($1.Identifier);
-   }
-   | SUBTRACT Argument {
-      $$ = $2.Negate();
-   }
-   | PARENTHESIS_OPEN Argument PARENTHESIS_CLOSE {
-      $$ = $2;
-   }
-   | Argument MULTIPLY Argument {
-      $$ = $1.Multiply($3);
-   }
-   | Argument DIVIDE Argument {
-      $$ = $1.Divide($3);
-   }
-   | Argument ADD Argument {
-      $$ = $1.Add($3);
-   }
-   | Argument SUBTRACT Argument {
-      $$ = $1.Subtract($3);
-   }
-   ;
-
-Arguments :
-   Argument {
-      $$ = ImmutableList<IArithmeticExpression>.Empty.Add($1);
-   }
-   | Arguments COMMA Argument {
-      $$ = $1.Add($3);
-   }
-   ;
@@ -1,19 +0,0 @@
-namespace Bts.ArithmeticExpressions;
-
-using System.Text;
-
-partial class ArithmeticExpressionParserImpl {
-   public ArithmeticExpressionParserImpl() : base(null) { }
-
-   public ValueType Parse(Stream stream) {
-      Scanner = new ArithmeticExpressionScanner(stream);
-      Parse();
-      return CurrentSemanticValue;
-   }
-
-   public ValueType Parse(string str) {
-      var inputBuffer = Encoding.Default.GetBytes(str);
-      using var stream = new MemoryStream(inputBuffer);
-      return Parse(stream);
-   }
-}
@@ -1,11 +0,0 @@
-namespace Bts.ArithmeticExpressions;
-
-using System;
-
-partial class ArithmeticExpressionScanner {
-   public override void yyerror(string format, params object[] args) {
-      base.yyerror(format, args);
-      Console.WriteLine(format, args);
-      Console.WriteLine();
-   }
-}
@@ -1,70 +0,0 @@
-%namespace Bts.ArithmeticExpressions
-%scannertype ArithmeticExpressionScanner
-%visibility internal
-%tokentype Token
-
-%option stack, minimize, parser, verbose, persistbuffer, noembedbuffers 
-
-Letter             [a-zA-Z]
-Identifier         {Letter}({Letter}*[0-9]*_*)*
-IntegerConstant    -?[0-9]+
-RealConstant       -?[0-9]+\.[0-9]+
-ParenthesisOpen    \(
-ParenthesisClose   \)
-Add                \+
-Subtract           \-
-Multiply           \*
-Divide             /
-Equals             =
-Comma              ,
-
-%%
-
-{IntegerConstant} {
-   yylval.Integer = int.Parse(yytext);
-   return (int)Token.INTEGER_CONSTANT;
-}
-
-{RealConstant} {
-   yylval.Real = double.Parse(yytext);
-   return (int)Token.REAL_CONSTANT;
-}
-
-{Identifier} {
-   yylval.Identifier = yytext;
-   return (int)Token.IDENTIFIER;
-}
-
-{ParenthesisOpen} {
-   return (int)Token.PARENTHESIS_OPEN;
-}
-
-{ParenthesisClose} {
-   return (int)Token.PARENTHESIS_CLOSE;
-}
-
-{Add} {
-   return (int)Token.ADD;
-}
-
-{Subtract} {
-   return (int)Token.SUBTRACT;
-}
-
-{Multiply} {
-   return (int)Token.MULTIPLY;
-}
-
-{Divide} {
-   return (int)Token.DIVIDE;
-}
-
-{Equals} {
-   return (int)Token.EQUALS;
-}
-
-{Comma} {
-   return (int)Token.COMMA;
-}
-
-%%
@@ -1,24 +0,0 @@
-<Project Sdk="Microsoft.NET.Sdk">
-
-  <PropertyGroup>
-    <TargetFramework>net7.0</TargetFramework>
-    <ImplicitUsings>enable</ImplicitUsings>
-    <Nullable>enable</Nullable>
-  </PropertyGroup>
-
-  <ItemGroup>
-    <PackageReference Include="Google.Protobuf" Version="3.24.3" />
-    <PackageReference Include="YaccLexTools" Version="1.2.0" />
-  </ItemGroup>
-
-  <ItemGroup>
-    <ProjectReference Include="..\ExpressionCore\ExpressionCore.csproj" />
-    <ProjectReference Include="..\..\client\spark_core\spark_core.csproj" />
-  </ItemGroup>
-
-  <ItemGroup Label="ArithmeticExpression">
-    <Scanner Include="ArithmeticExpressionTokens.lex" />
-    <Parser Include="ArithmeticExpressionGrammar.y" />
-  </ItemGroup>
-
-</Project>
@@ -1,21 +0,0 @@
-namespace Bts.ArithmeticExpressions;
-
-using System.Collections.Immutable;
-
-class ArithmeticProgram : IArithmeticProgram {
-   readonly ImmutableList<Assignment>? assignments;
-
-   public ArithmeticProgram(Assignment assignment) =>
-      assignments = ImmutableList<Assignment>.Empty.Add(assignment);
-
-   public ArithmeticProgram(ImmutableList<Assignment> assignments) =>
-      this.assignments = assignments;
-
-   IEnumerable<string> IArithmeticProgram.OutputIdentifiers =>
-      assignments.empty_if_null()
-         .Select(a => a.Identifier ?? throw new Exception("Identifier string is null"))
-         .Distinct();
-
-   IDictionary<string, object?> IArithmeticProgram.Evaluate(IDictionary<string, object?> env) =>
-      assignments.empty_if_null().Aggregate(env, (e, a) => a.Evaluate(e));
-}
@@ -1,16 +0,0 @@
-namespace Bts.ArithmeticExpressions;
-
-using Bts.ExpressionCore;
-
-public static class ArithmeticProgramParser {
-   public static IArithmeticProgram Parse(Stream expression) =>
-      new Parser().Parse(expression);
-
-   public static IArithmeticProgram Parse(string expression) =>
-      new Parser().Parse(expression);
-
-   class Parser : IParser<ArithmeticProgram> {
-      public ArithmeticProgram Parse(Stream expression) =>
-         new ArithmeticExpressionParserImpl().Parse(expression).Program;
-   }
-}
@@ -1,24 +0,0 @@
-namespace Bts.ArithmeticExpressions;
-
-public class Assignment {
-   public Assignment(string? identifier, IArithmeticExpression? value) {
-      Identifier = identifier ?? throw new ArgumentNullException(nameof(identifier));
-      Value = value ?? throw new ArgumentNullException(nameof(identifier));
-   }
-
-   public string? Identifier { get; }
-   public IArithmeticExpression? Value { get; }
-
-   public IDictionary<string, object?> Evaluate(IDictionary<string, object?> env) {
-      if (Identifier is null) {
-         throw new InvalidOperationException("Identifier is null");
-      }
-      if (Value is null) {
-         throw new InvalidOperationException($"Value is null (Identifier '{Identifier}')");
-      }
-      env[Identifier] = Value.Evaluate(env) ?? throw new Exception(
-         $"{nameof(Assignment)}.{nameof(Value)} (of type '{Value.GetType()}') " +
-         $"evaluated to null (Identifier '{Identifier}')");
-      return env;
-   }
-}
@@ -1,45 +0,0 @@
-namespace Bts.ArithmeticExpressions;
-
-using System.Numerics;
-
-public class Difference : IArithmeticExpression<double> {
-   readonly IArithmeticExpression lhs;
-   readonly IArithmeticExpression rhs;
-
-   public Difference(IArithmeticExpression lhs, IArithmeticExpression rhs) {
-      this.lhs = lhs;
-      this.rhs = rhs;
-   }
-
-   public static Difference<T, T, T> Create<T>(
-      IArithmeticExpression<T> left, IArithmeticExpression<T> right)
-      where T : INumber<T>, ISubtractionOperators<T, T, T> =>
-      new(left, right);
-
-   public double Evaluate(IDictionary<string, object?> env) =>
-      evaluateArg(lhs, nameof(lhs), env) - evaluateArg(rhs, nameof(rhs), env);
-
-   static double evaluateArg(
-      IArithmeticExpression expr, string name, IDictionary<string, object?> env) {
-      var obj = expr.Evaluate(env);
-      return ConvertUtils.try_convert(expr.Evaluate(env), out double dbl) ? dbl :
-         throw new Exception(
-            $"Invalid Difference. {name} is of type {obj?.GetType()} (expected {typeof(double)})");
-   }
-}
-
-public class Difference<TLeft, TRight, TResult> : IArithmeticExpression<TResult>
-   where TLeft : INumber<TLeft>, ISubtractionOperators<TLeft, TRight, TResult>
-   where TRight : INumber<TRight>
-   where TResult : INumber<TResult> {
-   readonly IArithmeticExpression<TLeft> left;
-   readonly IArithmeticExpression<TRight> right;
-
-   public Difference(IArithmeticExpression<TLeft> left, IArithmeticExpression<TRight> right) {
-      this.left = left;
-      this.right = right;
-   }
-
-   public TResult Evaluate(IDictionary<string, object?> env) =>
-      left.Evaluate(env) - right.Evaluate(env);
-}
@@ -1,208 +0,0 @@
-namespace Bts.ArithmeticExpressions;
-
-using System.Collections;
-using System.Diagnostics.CodeAnalysis;
-
-class EvaluationEnvironment : IDictionary<string, object?>, IReadOnlyDictionary<string, object?> {
-   IDictionary<string, object?> outerEnv;
-   IDictionary<string, object?> innerEnv = new Dictionary<string, object?>();
-   int? count;
-
-   public EvaluationEnvironment(IDictionary<string, object?> initial) =>
-      outerEnv = initial;
-
-   public object? this[string key] {
-      get {
-         if (innerEnv.TryGetValue(key, out var rv)) {
-            return rv;
-         }
-         if (outerEnv.TryGetValue(key, out rv)) {
-            return rv;
-         }
-         throw new Exception($"Undefined identifier '{key}'");
-      }
-      set {
-         if (count.HasValue && !ContainsKey(key)) {
-            count = count.Value + 1;
-            innerEnv.Add(key, value);
-            return;
-         }
-         innerEnv[key] = value;
-      }
-   }
-
-   public IDictionary<string, object?> Result =>
-      innerEnv;
-
-   public ICollection<string> Keys =>
-      new KeyCollection(outerEnv, innerEnv);
-
-   public ICollection<object?> Values =>
-      new ValueCollection(outerEnv, innerEnv);
-
-   public int Count =>
-      count ??= countKeys(outerEnv, innerEnv);
-
-   public bool IsReadOnly => throw new NotImplementedException();
-
-   public bool ContainsKey(string key) =>
-      innerEnv.ContainsKey(key) || outerEnv.ContainsKey(key);
-
-   public bool TryGetValue(string key, [MaybeNullWhen(false)] out object? value) =>
-      innerEnv.TryGetValue(key, out value) || outerEnv.TryGetValue(key, out value);
-
-   public IEnumerator<KeyValuePair<string, object?>> GetEnumerator() {
-      foreach (var kv in innerEnv) {
-         yield return kv;
-      }
-      foreach (var kv in outerEnv.Except()) {
-         if (!innerEnv.ContainsKey(kv.Key)) {
-            yield return kv;
-         }
-      }
-   }
-
-   public void Add(string key, object? value) {
-      if (ContainsKey(key)) {
-         throw new ArgumentException(
-            $"An element with the same key ({key}) already exists", nameof(key));
-      }
-      innerEnv.Add(key, value);
-   }
-
-   public void Add(KeyValuePair<string, object?> item) =>
-      Add(item.Key, item.Value);
-
-   public void Clear() =>
-      throw new NotSupportedException();
-
-   public bool Contains(KeyValuePair<string, object?> item) =>
-      TryGetValue(item.Key, out var v) && Equals(v, item.Value);
-
-   public void CopyTo(KeyValuePair<string, object?>[] array, int arrayIndex) {
-      foreach (var kv in innerEnv) {
-         array[arrayIndex++] = kv;
-      }
-      foreach (var kv in outerEnv) {
-         if (!innerEnv.ContainsKey(kv.Key)) {
-            array[arrayIndex++] = kv;
-         }
-      }
-   }
-
-   public bool Remove(string key) =>
-      throw new NotSupportedException();
-
-   public bool Remove(KeyValuePair<string, object?> item) =>
-      throw new NotSupportedException();
-
-   static int countKeys(IDictionary<string, object?> d1, IDictionary<string, object?> d2) =>
-      d1.Count > d2.Count ?
-         d1.Count + d2.Keys.WhereNot(d1.ContainsKey).Count() :
-         d2.Count + d1.Keys.WhereNot(d2.ContainsKey).Count();
-
-   IEnumerable<string> IReadOnlyDictionary<string, object?>.Keys => Keys;
-   IEnumerable<object?> IReadOnlyDictionary<string, object?>.Values => Values;
-   IEnumerator IEnumerable.GetEnumerator() => GetEnumerator();
-
-   class KeyCollection : ICollection<string> {
-      readonly IDictionary<string, object?> outerEnv;
-      readonly IDictionary<string, object?> innerEnv;
-
-      public KeyCollection(
-         IDictionary<string, object?> outerEnv, IDictionary<string, object?> innerEnv) {
-         this.outerEnv = outerEnv;
-         this.innerEnv = innerEnv;
-      }
-
-      public int Count =>
-         countKeys(outerEnv, innerEnv);
-
-      public bool IsReadOnly => true;
-
-      public void Add(string item) =>
-         throw new NotSupportedException();
-
-      public void Clear() =>
-         throw new NotSupportedException();
-
-      public bool Contains(string item) =>
-         innerEnv.ContainsKey(item) || outerEnv.ContainsKey(item);
-
-      public void CopyTo(string[] array, int arrayIndex) {
-         foreach (var k in this) {
-            array[arrayIndex++] = k;
-         }
-      }
-
-      public IEnumerator<string> GetEnumerator() {
-         foreach (var k in innerEnv.Keys) {
-            yield return k;
-         }
-         foreach (var k in outerEnv.Keys) {
-            if (!innerEnv.ContainsKey(k)) {
-               yield return k;
-            }
-         }
-      }
-
-      public bool Remove(string item) =>
-         throw new NotSupportedException();
-
-      IEnumerator IEnumerable.GetEnumerator() =>
-         GetEnumerator();
-   }
-
-   class ValueCollection : ICollection<object?> {
-      readonly IDictionary<string, object?> outerEnv;
-      readonly IDictionary<string, object?> innerEnv;
-
-      public ValueCollection(
-         IDictionary<string, object?> outerEnv, IDictionary<string, object?> innerEnv) {
-         this.outerEnv = outerEnv;
-         this.innerEnv = innerEnv;
-      }
-
-      public int Count =>
-         // Not a typo (obv, numValues == numKeys)
-         countKeys(outerEnv, innerEnv);
-
-      public bool IsReadOnly => true;
-
-      public void Add(object? item) =>
-         throw new NotSupportedException();
-
-      public void Clear() =>
-         throw new NotSupportedException();
-
-      public bool Contains(object? item) =>
-         innerEnv.Values.Contains(item) ||
-         outerEnv
-            .Where(kv => !innerEnv.ContainsKey(kv.Key))
-            .Select(kv => kv.Value)
-            .Contains(item);
-
-      public void CopyTo(object?[] array, int arrayIndex) {
-         foreach (var k in this) {
-            array[arrayIndex++] = k;
-         }
-      }
-
-      public IEnumerator<object?> GetEnumerator() {
-         foreach (var k in innerEnv.Values) {
-            yield return k;
-         }
-         foreach (var kv in outerEnv) {
-            if (!innerEnv.ContainsKey(kv.Key)) {
-               yield return kv.Value;
-            }
-         }
-      }
-
-      public bool Remove(object? item) =>
-         throw new NotSupportedException();
-
-      IEnumerator IEnumerable.GetEnumerator() =>
-         GetEnumerator();
-   }
-}
@@ -1,34 +0,0 @@
-namespace Bts.ArithmeticExpressions;
-
-using Spark.Core;
-
-using System.Collections.Immutable;
-using System.Data;
-
-public class Function : IArithmeticExpression {
-   public Function(string? identifier, ImmutableList<IArithmeticExpression>? arguments) {
-      Identifier = identifier;
-      Arguments = arguments;
-   }
-
-   public string? Identifier { get; }
-   public ImmutableList<IArithmeticExpression>? Arguments { get; }
-
-   public object? Evaluate(IDictionary<string, object?> env) {
-      if (Identifier is null) {
-         throw new InvalidOperationException("Identifier is null");
-      }
-      if (Arguments is null) {
-         throw new InvalidOperationException("Arguments is null");
-      }
-      if (Identifier == "ifNull") {
-         throw new NotImplementedException("'ifNull' function not yet implemented");
-      }
-      var argVals = Arguments.Select(e => e.Evaluate(env)).ToArray();
-      var argTypes = Array.ConvertAll(argVals, v => v?.GetType() ?? typeof(object));
-      var method = typeof(Math).GetMethod(Identifier, argTypes) ??
-         throw new EvaluateException(
-            $"Failed to find method '{Identifier}({", ".join(argTypes)})' in {typeof(Math)}");
-      return method.Invoke(null, argVals);
-   }
-}
@@ -1,720 +0,0 @@
-// ==============================================================
-// <auto-generated>
-// This code automatically produced from an embedded resource.
-// Do not edit this file, or it will become incompatible with 
-// the specification from which it was generated.
-// </auto-generated>
-// ==============================================================
-
-using System;
-using System.IO;
-using System.Text;
-using System.Collections.Generic;
-using System.Diagnostics.CodeAnalysis;
-using System.Runtime.Serialization;
-using System.Globalization;
-
-namespace QUT.GplexBuffers
-{
-// Code copied from GPLEX embedded resource
-    [Serializable]
-    internal class BufferException : Exception
-    {
-        public BufferException() { }
-        public BufferException(string message) : base(message) { }
-        public BufferException(string message, Exception innerException)
-            : base(message, innerException) { }
-        protected BufferException(SerializationInfo info, StreamingContext context)
-            : base(info, context) { }
-    }
-
-    internal abstract class ScanBuff
-    {
-        private string fileNm;
-
-        public const int EndOfFile = -1;
-        public const int UnicodeReplacementChar = 0xFFFD;
-
-        public bool IsFile { get { return (fileNm != null); } }
-        public string FileName { get { return fileNm; } set { fileNm = value; } }
-
-        public abstract int Pos { get; set; }
-        public abstract int Read();
-        public virtual void Mark() { }
-
-        public abstract string GetString(int begin, int limit);
-
-        public static ScanBuff GetBuffer(string source)
-        {
-            return new StringBuffer(source);
-        }
-
-        public static ScanBuff GetBuffer(IList<string> source)
-        {
-            return new LineBuffer(source);
-        }
-
-#if (!NOFILES)
-        public static ScanBuff GetBuffer(Stream source)
-        {
-            return new BuildBuffer(source);
-        }
-
-#if (!BYTEMODE)
-        public static ScanBuff GetBuffer(Stream source, int fallbackCodePage)
-        {
-            return new BuildBuffer(source, fallbackCodePage);
-        }
-#endif // !BYTEMODE
-#endif // !NOFILES
-    }
-
-    #region Buffer classes
-
-    // ==============================================================
-    // =====  Definitions for various ScanBuff derived classes   ====
-    // ==============================================================
-    // ===============         String input          ================
-    // ==============================================================
-
-    /// <summary>
-    /// This class reads characters from a single string as
-    /// required, for example, by Visual Studio language services
-    /// </summary>
-    sealed class StringBuffer : ScanBuff
-    {
-        string str;        // input buffer
-        int bPos;          // current position in buffer
-        int sLen;
-
-        public StringBuffer(string source)
-        {
-            this.str = source;
-            this.sLen = source.Length;
-            this.FileName = null;
-        }
-
-        public override int Read()
-        {
-            if (bPos < sLen) return str[bPos++];
-            else if (bPos == sLen) { bPos++; return '\n'; }   // one strike, see new line
-            else { bPos++; return EndOfFile; }                // two strikes and you're out!
-        }
-
-        public override string GetString(int begin, int limit)
-        {
-            //  "limit" can be greater than sLen with the BABEL
-            //  option set.  Read returns a "virtual" EOL if
-            //  an attempt is made to read past the end of the
-            //  string buffer.  Without the guard any attempt 
-            //  to fetch yytext for a token that includes the 
-            //  EOL will throw an index exception.
-            if (limit > sLen) limit = sLen;
-            if (limit <= begin) return "";
-            else return str.Substring(begin, limit - begin);
-        }
-
-        public override int Pos
-        {
-            get { return bPos; }
-            set { bPos = value; }
-        }
-
-        public override string ToString() { return "StringBuffer"; }
-    }
-
-    // ==============================================================
-    //  The LineBuff class contributed by Nigel Horspool, 
-    //  nigelh@cs.uvic.cs
-    // ==============================================================
-
-    sealed class LineBuffer : ScanBuff
-    {
-        IList<string> line;    // list of source lines from a file
-        int numLines;          // number of strings in line list
-        string curLine;        // current line in that list
-        int cLine;             // index of current line in the list
-        int curLen;            // length of current line
-        int curLineStart;      // position of line start in whole file
-        int curLineEnd;        // position of line end in whole file
-        int maxPos;            // max position ever visited in whole file
-        int cPos;              // ordinal number of code in source
-
-        // Constructed from a list of strings, one per source line.
-        // The lines have had trailing '\n' characters removed.
-        public LineBuffer(IList<string> lineList)
-        {
-            line = lineList;
-            numLines = line.Count;
-            cPos = curLineStart = 0;
-            curLine = (numLines > 0 ? line[0] : "");
-            maxPos = curLineEnd = curLen = curLine.Length;
-            cLine = 1;
-            FileName = null;
-        }
-
-        public override int Read()
-        {
-            if (cPos < curLineEnd)
-                return curLine[cPos++ - curLineStart];
-            if (cPos++ == curLineEnd)
-                return '\n';
-            if (cLine >= numLines)
-                return EndOfFile;
-            curLine = line[cLine];
-            curLen = curLine.Length;
-            curLineStart = curLineEnd + 1;
-            curLineEnd = curLineStart + curLen;
-            if (curLineEnd > maxPos)
-                maxPos = curLineEnd;
-            cLine++;
-            return curLen > 0 ? curLine[0] : '\n';
-        }
-
-        // To speed up searches for the line containing a position
-        private int cachedPosition;
-        private int cachedIxdex;
-        private int cachedLineStart;
-
-        // Given a position pos within the entire source, the results are
-        //   ix     -- the index of the containing line
-        //   lstart -- the position of the first character on that line
-        private void findIndex(int pos, out int ix, out int lstart)
-        {
-            if (pos >= cachedPosition)
-            {
-                ix = cachedIxdex; lstart = cachedLineStart;
-            }
-            else
-            {
-                ix = lstart = 0;
-            }
-            while (ix < numLines)
-            {
-                int len = line[ix].Length + 1;
-                if (pos < lstart + len) break;
-                lstart += len;
-                ix++;
-            }
-            cachedPosition = pos;
-            cachedIxdex = ix;
-            cachedLineStart = lstart;
-        }
-
-        public override string GetString(int begin, int limit)
-        {
-            if (begin >= maxPos || limit <= begin) return "";
-            int endIx, begIx, endLineStart, begLineStart;
-            findIndex(begin, out begIx, out begLineStart);
-            int begCol = begin - begLineStart;
-            findIndex(limit, out endIx, out endLineStart);
-            int endCol = limit - endLineStart;
-            string s = line[begIx];
-            if (begIx == endIx)
-            {
-                // the usual case, substring all on one line
-                return (endCol <= s.Length) ?
-                    s.Substring(begCol, endCol - begCol)
-                    : s.Substring(begCol) + "\n";
-            }
-            // the string spans multiple lines, yuk!
-            StringBuilder sb = new StringBuilder();
-            if (begCol < s.Length)
-                sb.Append(s.Substring(begCol));
-            for (; ; )
-            {
-                sb.Append("\n");
-                s = line[++begIx];
-                if (begIx >= endIx) break;
-                sb.Append(s);
-            }
-            if (endCol <= s.Length)
-            {
-                sb.Append(s.Substring(0, endCol));
-            }
-            else
-            {
-                sb.Append(s);
-                sb.Append("\n");
-            }
-            return sb.ToString();
-        }
-
-        public override int Pos
-        {
-            get { return cPos; }
-            set
-            {
-                cPos = value;
-                findIndex(cPos, out cLine, out curLineStart);
-                // cLine should be the *next* line after curLine.
-                curLine = (cLine < numLines ? line[cLine++] : "");
-                curLineEnd = curLineStart + curLine.Length;
-            }
-        }
-
-        public override string ToString() { return "LineBuffer"; }
-    }
-
-#if (!NOFILES)
-    // ==============================================================
-    // =====     class BuildBuff : for unicode text files    ========
-    // ==============================================================
-
-    class BuildBuffer : ScanBuff
-    {
-        // Double buffer for char stream.
-        class BufferElement
-        {
-            StringBuilder bldr = new StringBuilder();
-            StringBuilder next = new StringBuilder();
-            int minIx;
-            int maxIx;
-            int brkIx;
-            bool appendToNext;
-
-            internal BufferElement() { }
-
-            internal int MaxIndex { get { return maxIx; } }
-            // internal int MinIndex { get { return minIx; } }
-
-            internal char this[int index]
-            {
-                get
-                {
-                    if (index < minIx || index >= maxIx)
-                        throw new BufferException("Index was outside data buffer");
-                    else if (index < brkIx)
-                        return bldr[index - minIx];
-                    else
-                        return next[index - brkIx];
-                }
-            }
-
-            internal void Append(char[] block, int count)
-            {
-                maxIx += count;
-                if (appendToNext)
-                    this.next.Append(block, 0, count);
-                else
-                {
-                    this.bldr.Append(block, 0, count);
-                    brkIx = maxIx;
-                    appendToNext = true;
-                }
-            }
-
-            internal string GetString(int start, int limit)
-            {
-                if (limit <= start)
-                    return "";
-                if (start >= minIx && limit <= maxIx)
-                    if (limit < brkIx) // String entirely in bldr builder
-                        return bldr.ToString(start - minIx, limit - start);
-                    else if (start >= brkIx) // String entirely in next builder
-                        return next.ToString(start - brkIx, limit - start);
-                    else // Must do a string-concatenation
-                        return
-                            bldr.ToString(start - minIx, brkIx - start) +
-                            next.ToString(0, limit - brkIx);
-                else
-                    throw new BufferException("String was outside data buffer");
-            }
-
-            internal void Mark(int limit)
-            {
-                if (limit > brkIx + 16) // Rotate blocks
-                {
-                    StringBuilder temp = bldr;
-                    bldr = next;
-                    next = temp;
-                    next.Length = 0;
-                    minIx = brkIx;
-                    brkIx = maxIx;
-                }
-            }
-        }
-
-        BufferElement data = new BufferElement();
-
-        int bPos;            // Postion index in the StringBuilder
-        BlockReader NextBlk; // Delegate that serves char-arrays;
-
-        private string EncodingName
-        {
-            get
-            {
-                StreamReader rdr = NextBlk.Target as StreamReader;
-                return (rdr == null ? "raw-bytes" : rdr.CurrentEncoding.BodyName);
-            }
-        }
-
-        public BuildBuffer(Stream stream)
-        {
-            FileStream fStrm = (stream as FileStream);
-            if (fStrm != null) FileName = fStrm.Name;
-            NextBlk = BlockReaderFactory.Raw(stream);
-        }
-
-#if (!BYTEMODE)
-        public BuildBuffer(Stream stream, int fallbackCodePage)
-        {
-            FileStream fStrm = (stream as FileStream);
-            if (fStrm != null) FileName = fStrm.Name;
-            NextBlk = BlockReaderFactory.Get(stream, fallbackCodePage);
-        }
-#endif
-
-        /// <summary>
-        /// Marks a conservative lower bound for the buffer,
-        /// allowing space to be reclaimed.  If an application 
-        /// needs to call GetString at arbitrary past locations 
-        /// in the input stream, Mark() is not called.
-        /// </summary>
-        public override void Mark() { data.Mark(bPos - 2); }
-
-        public override int Pos
-        {
-            get { return bPos; }
-            set { bPos = value; }
-        }
-
-
-        /// <summary>
-        /// Read returns the ordinal number of the next char, or 
-        /// EOF (-1) for an end of stream.  Note that the next
-        /// code point may require *two* calls of Read().
-        /// </summary>
-        /// <returns></returns>
-        public override int Read()
-        {
-            //
-            //  Characters at positions 
-            //  [data.offset, data.offset + data.bldr.Length)
-            //  are available in data.bldr.
-            //
-            if (bPos < data.MaxIndex)
-            {
-                // ch0 cannot be EOF
-                return (int)data[bPos++];
-            }
-            else // Read from underlying stream
-            {
-                // Experimental code, blocks of page size
-                char[] chrs = new char[4096];
-                int count = NextBlk(chrs, 0, 4096);
-                if (count == 0)
-                    return EndOfFile;
-                else
-                {
-                    data.Append(chrs, count);
-                    return (int)data[bPos++];
-                }
-            }
-        }
-
-        public override string GetString(int begin, int limit)
-        {
-            return data.GetString(begin, limit);
-        }
-
-        public override string ToString()
-        {
-            return "StringBuilder buffer, encoding: " + this.EncodingName;
-        }
-    }
-
-    // =============== End ScanBuff-derived classes ==================
-
-    internal delegate int BlockReader(char[] block, int index, int number);
-
-    // A delegate factory, serving up a delegate that
-    // reads a block of characters from the underlying
-    // encoded stream, via a StreamReader object.
-    //
-    internal static class BlockReaderFactory
-    {
-        public static BlockReader Raw(Stream stream)
-        {
-            return delegate(char[] block, int index, int number)
-            {
-                byte[] b = new byte[number];
-                int count = stream.Read(b, 0, number);
-                int i = 0;
-                int j = index;
-                for (; i < count; i++, j++)
-                    block[j] = (char)b[i];
-                return count;
-            };
-        }
-
-#if (!BYTEMODE)
-        public static BlockReader Get(Stream stream, int fallbackCodePage)
-        {
-            Encoding encoding;
-            int preamble = Preamble(stream);
-
-            if (preamble != 0)  // There is a valid BOM here!
-                encoding = Encoding.GetEncoding(preamble);
-            else if (fallbackCodePage == -1) // Fallback is "raw" bytes
-                return Raw(stream);
-            else if (fallbackCodePage != -2) // Anything but "guess"
-                encoding = Encoding.GetEncoding(fallbackCodePage);
-            else // This is the "guess" option
-            {
-                int guess = new Guesser(stream).GuessCodePage();
-                stream.Seek(0, SeekOrigin.Begin);
-                if (guess == -1) // ==> this is a 7-bit file
-                    encoding = Encoding.ASCII;
-                else if (guess == 65001)
-                    encoding = Encoding.UTF8;
-                else             // ==> use the machine default
-                    encoding = Encoding.Default;
-            }
-            StreamReader reader = new StreamReader(stream, encoding);
-            return reader.Read;
-        }
-
-        static int Preamble(Stream stream)
-        {
-            int b0 = stream.ReadByte();
-            int b1 = stream.ReadByte();
-
-            if (b0 == 0xfe && b1 == 0xff)
-                return 1201; // UTF16BE
-            if (b0 == 0xff && b1 == 0xfe)
-                return 1200; // UTF16LE
-
-            int b2 = stream.ReadByte();
-            if (b0 == 0xef && b1 == 0xbb && b2 == 0xbf)
-                return 65001; // UTF8
-            //
-            // There is no unicode preamble, so we
-            // return denoter for the machine default.
-            //
-            stream.Seek(0, SeekOrigin.Begin);
-            return 0;
-        }
-#endif // !BYTEMODE
-    }
-#endif // !NOFILES
-    #endregion Buffer classes
-
-    // ==============================================================
-    // ============      class CodePageHandling         =============
-    // ==============================================================
-#if (!NOFILES)
-    public static class CodePageHandling
-    {
-        public static int GetCodePage(string option)
-        {
-            string command = option.ToUpperInvariant();
-            if (command.StartsWith("CodePage:", StringComparison.OrdinalIgnoreCase))
-                command = command.Substring(9);
-            try
-            {
-                if (command.Equals("RAW"))
-                    return -1;
-                else if (command.Equals("GUESS"))
-                    return -2;
-                else if (command.Equals("DEFAULT"))
-                    return 0;
-                else if (char.IsDigit(command[0]))
-                    return int.Parse(command, CultureInfo.InvariantCulture);
-                else
-                {
-                    Encoding enc = Encoding.GetEncoding(command);
-                    return enc.CodePage;
-                }
-            }
-            catch (FormatException)
-            {
-                Console.Error.WriteLine(
-                    "Invalid format \"{0}\", using machine default", option);
-            }
-            catch (ArgumentException)
-            {
-                Console.Error.WriteLine(
-                    "Unknown code page \"{0}\", using machine default", option);
-            }
-            return 0;
-        }
-    }
-#region guesser
-#if (!BYTEMODE)
-    // ==============================================================
-    // ============          Encoding Guesser           =============
-    // ==============================================================
-
-    /// <summary>
-    /// This class provides a simple finite state automaton that
-    /// scans the file looking for (1) valid UTF-8 byte patterns,
-    /// (2) bytes >= 0x80 which are not part of a UTF-8 sequence.
-    /// The method then guesses whether it is UTF-8 or maybe some 
-    /// local machine default encoding.  This works well for the
-    /// various Latin encodings.
-    /// </summary>
-    internal class Guesser
-    {
-        ScanBuff buffer;
-
-        public int GuessCodePage() { return Scan(); }
-
-        const int maxAccept = 10;
-        const int initial = 0;
-        const int eofNum = 0;
-        const int goStart = -1;
-        const int INITIAL = 0;
-        const int EndToken = 0;
-
-        #region user code
-        /* 
-         *  Reads the bytes of a file to determine if it is 
-         *  UTF-8 or a single-byte code page file.
-         */
-        public long utfX;
-        public long uppr;
-        #endregion user code
-
-        int state;
-        int currentStart = startState[0];
-        int code;
-
-        #region ScannerTables
-        static int[] startState = new int[] { 11, 0 };
-
-        #region CharacterMap
-        static sbyte[] map = new sbyte[256] {
-/*     '\0' */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 
-/*   '\x10' */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 
-/*   '\x20' */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 
-/*      '0' */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 
-/*      '@' */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 
-/*      'P' */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 
-/*      '`' */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 
-/*      'p' */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 
-/*   '\x80' */ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 
-/*   '\x90' */ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 
-/*   '\xA0' */ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 
-/*   '\xB0' */ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 
-/*   '\xC0' */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 
-/*   '\xD0' */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 
-/*   '\xE0' */ 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 
-/*   '\xF0' */ 4, 4, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 5, 5, 5, 5 };
-        #endregion
-
-        static sbyte[][] nextState = new sbyte[][] {
-            new sbyte[] {0, 0, 0, 0, 0, 0},
-            new sbyte[] {-1, -1, 10, -1, -1, -1},
-            new sbyte[] {-1, -1, -1, -1, -1, -1},
-            new sbyte[] {-1, -1, 8, -1, -1, -1},
-            new sbyte[] {-1, -1, 5, -1, -1, -1},
-            new sbyte[] {-1, -1, 6, -1, -1, -1},
-            new sbyte[] {-1, -1, 7, -1, -1, -1},
-            null,
-            new sbyte[] {-1, -1, 9, -1, -1, -1},
-            null,
-            null,
-            new sbyte[] {-1, 1, 2, 3, 4, 2}
-        };
-
-
-        [SuppressMessage("Microsoft.Performance", "CA1810:InitializeReferenceTypeStaticFieldsInline")]
-        // Reason for suppression: cannot have self-reference in array initializer.
-        static Guesser()
-        {
-            nextState[7] = nextState[2];
-            nextState[9] = nextState[2];
-            nextState[10] = nextState[2];
-        }
-
-        int NextState()
-        {
-            if (code == ScanBuff.EndOfFile)
-                return eofNum;
-            else
-                return nextState[state][map[code]];
-        }
-        #endregion
-
-        public Guesser(System.IO.Stream file) { SetSource(file); }
-
-        public void SetSource(System.IO.Stream source)
-        {
-            this.buffer = new BuildBuffer(source);
-            code = buffer.Read();
-        }
-
-        int Scan()
-        {
-            for (; ; )
-            {
-                int next;
-                state = currentStart;
-                while ((next = NextState()) == goStart)
-                    code = buffer.Read();
-
-                state = next;
-                code = buffer.Read();
-
-                while ((next = NextState()) > eofNum)
-                {
-                    state = next;
-                    code = buffer.Read();
-                }
-                if (state <= maxAccept)
-                {
-                    #region ActionSwitch
-#pragma warning disable 162
-                    switch (state)
-                    {
-                        case eofNum:
-                            switch (currentStart)
-                            {
-                                case 11:
-                                    if (utfX == 0 && uppr == 0) return -1; /* raw ascii */
-                                    else if (uppr * 10 > utfX) return 0;   /* default code page */
-                                    else return 65001;                     /* UTF-8 encoding */
-                                    break;
-                            }
-                            return EndToken;
-                        case 1: // Recognized '{Upper128}',	Shortest string "\xC0"
-                        case 2: // Recognized '{Upper128}',	Shortest string "\x80"
-                        case 3: // Recognized '{Upper128}',	Shortest string "\xE0"
-                        case 4: // Recognized '{Upper128}',	Shortest string "\xF0"
-                            uppr++;
-                            break;
-                        case 5: // Recognized '{Utf8pfx4}{Utf8cont}',	Shortest string "\xF0\x80"
-                            uppr += 2;
-                            break;
-                        case 6: // Recognized '{Utf8pfx4}{Utf8cont}{2}',	Shortest string "\xF0\x80\x80"
-                            uppr += 3;
-                            break;
-                        case 7: // Recognized '{Utf8pfx4}{Utf8cont}{3}',	Shortest string "\xF0\x80\x80\x80"
-                            utfX += 3;
-                            break;
-                        case 8: // Recognized '{Utf8pfx3}{Utf8cont}',	Shortest string "\xE0\x80"
-                            uppr += 2;
-                            break;
-                        case 9: // Recognized '{Utf8pfx3}{Utf8cont}{2}',	Shortest string "\xE0\x80\x80"
-                            utfX += 2;
-                            break;
-                        case 10: // Recognized '{Utf8pfx2}{Utf8cont}',	Shortest string "\xC0\x80"
-                            utfX++;
-                            break;
-                        default:
-                            break;
-                    }
-#pragma warning restore 162
-                    #endregion
-                }
-            }
-        }
-    } // end class Guesser
-    
-#endif // !BYTEMODE
-#endregion
-#endif // !NOFILES
-
-// End of code copied from embedded resource
-}
@@ -1,19 +0,0 @@
-namespace Bts.ArithmeticExpressions;
-
-using System.Numerics;
-
-public interface IArithmeticExpression {
-   IArithmeticExpression Add(IArithmeticExpression factor) => new Sum(this, factor);
-   IArithmeticExpression Divide(IArithmeticExpression other) => new Quotient(this, other);
-   IArithmeticExpression Multiply(IArithmeticExpression other) => new Product(this, other);
-   IArithmeticExpression Subtract(IArithmeticExpression other) => new Difference(this, other);
-   IArithmeticExpression Negate() => new AdditiveInverse(this);
-   object? Evaluate(IDictionary<string, object?> env);
-}
-
-public interface IArithmeticExpression<T> : IArithmeticExpression where T : INumber<T> {
-   new T Evaluate(IDictionary<string, object?> env);
-
-   object? IArithmeticExpression.Evaluate(IDictionary<string, object?> env) =>
-      Evaluate(env);
-}
@@ -1,7 +0,0 @@
-namespace Bts.ArithmeticExpressions;
-
-public interface IArithmeticProgram {
-   IEnumerable<string> OutputIdentifiers { get; }
-
-   IDictionary<string, object?> Evaluate(IDictionary<string, object?> env);
-}
@@ -1,11 +0,0 @@
-namespace Bts.ArithmeticExpressions;
-
-class IntegerConstant : IArithmeticExpression<int> {
-   readonly int value;
-
-   public IntegerConstant(int value) =>
-      this.value = value;
-
-   public int Evaluate(IDictionary<string, object?> env) =>
-      value;
-}
@@ -1,45 +0,0 @@
-namespace Bts.ArithmeticExpressions;
-
-using System.Numerics;
-
-class Product : IArithmeticExpression<double> {
-   readonly IArithmeticExpression left;
-   readonly IArithmeticExpression right;
-
-   public Product(IArithmeticExpression left, IArithmeticExpression right) {
-      this.left = left;
-      this.right = right;
-   }
-
-   public static Product<T, T, T> Create<T>(
-      IArithmeticExpression<T> left, IArithmeticExpression<T> right)
-      where T : INumber<T>, IMultiplyOperators<T, T, T> =>
-      new(left, right);
-
-   public double Evaluate(IDictionary<string, object?> env) =>
-      evaluateArg(left, nameof(left), env) * evaluateArg(right, nameof(right), env);
-
-   static double evaluateArg(
-      IArithmeticExpression expr, string name, IDictionary<string, object?> env) {
-      var obj = expr.Evaluate(env);
-      return ConvertUtils.try_convert(expr.Evaluate(env), out double dbl) ? dbl :
-         throw new Exception(
-            $"Invalid Product. {name} is of type {obj?.GetType()} (expected {typeof(double)})");
-   }
-}
-
-class Product<TLeft, TRight, TResult> : IArithmeticExpression<TResult>
-   where TLeft : INumber<TLeft>, IMultiplyOperators<TLeft, TRight, TResult>
-   where TRight : INumber<TRight>
-   where TResult : INumber<TResult> {
-   readonly IArithmeticExpression<TLeft> left;
-   readonly IArithmeticExpression<TRight> right;
-
-   public Product(IArithmeticExpression<TLeft> left, IArithmeticExpression<TRight> right) {
-      this.left = left;
-      this.right = right;
-   }
-
-   public TResult Evaluate(IDictionary<string, object?> env) =>
-      left.Evaluate(env) * right.Evaluate(env);
-}
@@ -1,45 +0,0 @@
-namespace Bts.ArithmeticExpressions;
-
-using System.Numerics;
-
-class Quotient : IArithmeticExpression<double> {
-   readonly IArithmeticExpression left;
-   readonly IArithmeticExpression right;
-
-   public Quotient(IArithmeticExpression left, IArithmeticExpression right) {
-      this.left = left;
-      this.right = right;
-   }
-
-   public static Quotient<T, T, T> Create<T>(
-      IArithmeticExpression<T> left, IArithmeticExpression<T> right)
-      where T : INumber<T>, IDivisionOperators<T, T, T> =>
-      new(left, right);
-
-   public double Evaluate(IDictionary<string, object?> env) =>
-      evaluateArg(left, nameof(left), env) / evaluateArg(right, nameof(right), env);
-
-   static double evaluateArg(
-      IArithmeticExpression expr, string name, IDictionary<string, object?> env) {
-      var obj = expr.Evaluate(env);
-      return ConvertUtils.try_convert(expr.Evaluate(env), out double dbl) ? dbl :
-         throw new Exception(
-            $"Invalid Quotient. {name} is of type {obj?.GetType()} (expected {typeof(double)})");
-   }
-}
-
-class Quotient<TLeft, TRight, TResult> : IArithmeticExpression<TResult>
-   where TLeft : INumber<TLeft>, IDivisionOperators<TLeft, TRight, TResult>
-   where TRight : INumber<TRight>
-   where TResult : INumber<TResult> {
-   readonly IArithmeticExpression<TLeft> left;
-   readonly IArithmeticExpression<TRight> right;
-
-   public Quotient(IArithmeticExpression<TLeft> left, IArithmeticExpression<TRight> right) {
-      this.left = left;
-      this.right = right;
-   }
-
-   public TResult Evaluate(IDictionary<string, object?> env) =>
-      left.Evaluate(env) / right.Evaluate(env);
-}
@@ -1,11 +0,0 @@
-namespace Bts.ArithmeticExpressions;
-
-class RealConstant : IArithmeticExpression<double> {
-   readonly double value;
-
-   public RealConstant(double value) =>
-      this.value = value;
-
-   public double Evaluate(IDictionary<string, object?> env) =>
-      value;
-}
@@ -1,884 +0,0 @@
-// ==============================================================
-// <auto-generated>
-// This code automatically produced from an embedded resource.
-// Do not edit this file, or it will become incompatible with 
-// the specification from which it was generated.
-// </auto-generated>
-// ==============================================================
-
-// Gardens Point Parser Generator
-// Copyright (c) Wayne Kelly, QUT 2005-2010
-// (see accompanying GPPGcopyright.rtf)
-
-using System;
-using System.Text;
-using System.Globalization;
-using System.Collections.Generic;
-using System.Runtime.Serialization;
-using System.Diagnostics.CodeAnalysis;
-
-namespace QUT.Gppg {
-    /// <summary>
-    /// Abstract class for GPPG shift-reduce parsers.
-    /// Parsers generated by GPPG derive from this base
-    /// class, overriding the abstract Initialize() and
-    /// DoAction() methods.
-    /// </summary>
-    /// <typeparam name="TValue">Semantic value type</typeparam>
-    /// <typeparam name="TSpan">Location type</typeparam>
-#if EXPORT_GPPG
-    public abstract class ShiftReduceParser<TValue, TSpan>
-#else
-    internal abstract class ShiftReduceParser<TValue, TSpan>
-#endif
- where TSpan : IMerge<TSpan>, new() {
-        private AbstractScanner<TValue, TSpan> scanner;
-        /// <summary>
-        /// The abstract scanner for this parser.
-        /// </summary>
-        protected AbstractScanner<TValue, TSpan> Scanner {
-            get { return scanner; }
-            set { scanner = value; }
-        }
-
-        /// <summary>
-        /// Constructor for base class
-        /// </summary>
-        /// <param name="scanner">Scanner instance for this parser</param>
-        protected ShiftReduceParser( AbstractScanner<TValue, TSpan> scanner ) {
-            this.scanner = scanner;
-        }
-
-        // ==============================================================
-        //                    TECHNICAL EXPLANATION.
-        //   Why the next two fields are not exposed via properties.
-        // ==============================================================
-        // These fields are of the generic parameter types, and are
-        // frequently instantiated as struct types in derived classes.
-        // Semantic actions are defined in the derived classes and refer
-        // to instance fields of these structs.  In such cases the code
-        // "get_CurrentSemanticValue().myField = blah;" will fail since
-        // the getter pushes the value of the field, not the reference.
-        // So, in the presence of properties, gppg would need to encode
-        // such field accesses as ... 
-        //  "tmp = get_CurrentSemanticValue(); // Fetch value
-        //   tmp.myField = blah;               // update
-        //   set_CurrentSemanticValue(tmp); "  // Write update back.
-        // There is no issue if TValue is restricted to be a ref type.
-        // The same explanation applies to scanner.yylval.
-        // ==============================================================
-        /// <summary>
-        /// The current value of the "$$" symbolic variable in the parser
-        /// </summary>
-        [SuppressMessage( "Microsoft.Design", "CA1051:DoNotDeclareVisibleInstanceFields" )]
-        protected TValue CurrentSemanticValue;
-
-        /// <summary>
-        /// The current value of the "@$" symbolic variable in the parser
-        /// </summary>
-        [SuppressMessage( "Microsoft.Design", "CA1051:DoNotDeclareVisibleInstanceFields" )]
-        protected TSpan CurrentLocationSpan;
-        protected int NextToken;
-
-        private TSpan LastSpan;
-        private State FsaState;
-        private bool recovering;
-        private int tokensSinceLastError;
-
-        private PushdownPrefixState<State> StateStack = new PushdownPrefixState<State>();
-        private PushdownPrefixState<TValue> valueStack = new PushdownPrefixState<TValue>();
-        private PushdownPrefixState<TSpan> locationStack = new PushdownPrefixState<TSpan>();
-
-        /// <summary>
-        /// The stack of semantic value (YYSTYPE) values.
-        /// </summary>
-        protected PushdownPrefixState<TValue> ValueStack { get { return valueStack; } }
-
-        /// <summary>
-        /// The stack of location value (YYLTYPE) varlues.
-        /// </summary>
-        protected PushdownPrefixState<TSpan> LocationStack { get { return locationStack; } }
-
-        private int errorToken;
-        private int endOfFileToken;
-        private string[] nonTerminals;
-        private State[] states;
-        private Rule[] rules;
-
-        /// <summary>
-        /// Initialization method to allow derived classes
-        /// to insert the rule list into this base class.
-        /// </summary>
-        /// <param name="rules">The array of Rule objects</param>
-        protected void InitRules( Rule[] rules ) { this.rules = rules; }
-
-        /// <summary>
-        /// Initialization method to allow derived classes to
-        /// insert the states table into this base class.
-        /// </summary>
-        /// <param name="states">The pre-initialized states table</param>
-        protected void InitStates( State[] states ) { this.states = states; }
-
-        /// <summary>
-        /// OBSOLETE FOR VERSION 1.4.0
-        /// </summary>
-        /// <param name="size"></param>
-        protected void InitStateTable( int size ) { states = new State[size]; }
-
-        /// <summary>
-        /// Initialization method to allow derived classes
-        /// to insert the special value for the error and EOF tokens.
-        /// </summary>
-        /// <param name="err">The error state ordinal</param>
-        /// <param name="end">The EOF stat ordinal</param>
-        protected void InitSpecialTokens( int err, int end ) {
-            errorToken = err;
-            endOfFileToken = end;
-        }
-
-        /// <summary>
-        /// Initialization method to allow derived classes to
-        /// insert the non-terminal symbol names into this base class.
-        /// </summary>
-        /// <param name="names">Non-terminal symbol names</param>
-        protected void InitNonTerminals( string[] names ) { nonTerminals = names; }
-
-        #region YYAbort, YYAccept etcetera.
-        [Serializable]
-        [SuppressMessage( "Microsoft.Design", "CA1064:ExceptionsShouldBePublic" )]
-        // Reason for FxCop message suppression -
-        // This exception cannot escape from the local context
-        private class AcceptException : Exception {
-            internal AcceptException() { }
-            protected AcceptException( SerializationInfo i, StreamingContext c ) : base( i, c ) { }
-        }
-        [Serializable]
-        [SuppressMessage( "Microsoft.Design", "CA1064:ExceptionsShouldBePublic" )]
-        // Reason for FxCop message suppression -
-        // This exception cannot escape from the local context
-        private class AbortException : Exception {
-            internal AbortException() { }
-            protected AbortException( SerializationInfo i, StreamingContext c ) : base( i, c ) { }
-        }
-        [Serializable]
-        [SuppressMessage( "Microsoft.Design", "CA1064:ExceptionsShouldBePublic" )]
-        // Reason for FxCop message suppression -
-        // This exception cannot escape from the local context
-        private class ErrorException : Exception {
-            internal ErrorException() { }
-            protected ErrorException( SerializationInfo i, StreamingContext c ) : base( i, c ) { }
-        }
-
-        // The following methods are only called from within
-        // a semantic action. The thrown exceptions can never
-        // propagate outside the ShiftReduceParser class in 
-        // which they are nested.
-
-        /// <summary>
-        /// Force parser to terminate, returning "true"
-        /// </summary>
-        protected static void YYAccept() { throw new AcceptException(); }
-
-        /// <summary>
-        /// Force parser to terminate, returning "false"
-        /// </summary>
-        protected static void YYAbort() { throw new AbortException(); }
-
-        /// <summary>
-        /// Force parser to terminate, returning
-        /// "false" if error recovery fails.
-        /// </summary>
-        protected static void YYError() { throw new ErrorException(); }
-
-        /// <summary>
-        /// Check if parser in error recovery state.
-        /// </summary>
-        protected bool YYRecovering { get { return recovering; } }
-        #endregion
-
-        /// <summary>
-        /// Abstract base method. ShiftReduceParser calls this
-        /// to initialize the base class data structures.  Concrete
-        /// parser classes must override this method.
-        /// </summary>
-        protected abstract void Initialize();
-
-        /// <summary>
-        /// Main entry point of the Shift-Reduce Parser.
-        /// </summary>
-        /// <returns>True if parse succeeds, else false for
-        /// unrecoverable errors</returns>
-        public bool Parse() {
-            Initialize();	// allow derived classes to instantiate rules, states and nonTerminals
-
-            NextToken = 0;
-            FsaState = states[0];
-
-            StateStack.Push( FsaState );
-            valueStack.Push( CurrentSemanticValue );
-            LocationStack.Push( CurrentLocationSpan );
-
-            while (true) {
-#if TRACE_ACTIONS
-                Console.Error.WriteLine("Entering state {0} ", FsaState.number);
-                DisplayStack();
-#endif
-                int action = FsaState.defaultAction;
-
-                if (FsaState.ParserTable != null) {
-                    if (NextToken == 0) {
-                        // We save the last token span, so that the location span
-                        // of production right hand sides that begin or end with a
-                        // nullable production will be correct.
-                        LastSpan = scanner.yylloc;
-                        NextToken = scanner.yylex();
-#if TRACE_ACTIONS
-                       Console.Error.WriteLine( "Reading: Next token is {0}", TerminalToString( NextToken ) );
-#endif
-                    }
-#if TRACE_ACTIONS
-                    else 
-                        Console.Error.WriteLine( "Next token is still {0}", TerminalToString( NextToken ) );
-#endif
-                    if (FsaState.ParserTable.ContainsKey( NextToken ))
-                        action = FsaState.ParserTable[NextToken];
-                }
-
-                if (action > 0)         // shift
-                {
-                    Shift( action );
-                }
-                else if (action < 0)   // reduce
-                {
-                    try {
-                        Reduce( -action );
-                        if (action == -1)	// accept
-                            return true;
-                    }
-                    catch (AbortException) {
-                            return false;
-                    }
-                    catch (AcceptException) {
-                        return true;
-                    }
-                    catch (ErrorException) {
-                        if (!ErrorRecovery())
-                            return false;
-                        else
-                            throw;  // Rethrow x, preserving information.
-                    }
-                }
-                else if (action == 0 && !ErrorRecovery()) // error
-                    return false;
-            }
-        }
-
-        private void Shift( int stateIndex ) {
-#if TRACE_ACTIONS
-				Console.Error.Write("Shifting token {0}, ", TerminalToString(NextToken));
-#endif
-            FsaState = states[stateIndex];
-
-            valueStack.Push( scanner.yylval );
-            StateStack.Push( FsaState );
-            LocationStack.Push( scanner.yylloc );
-
-            if (recovering) {
-                if (NextToken != errorToken)
-                    tokensSinceLastError++;
-
-                if (tokensSinceLastError > 5)
-                    recovering = false;
-            }
-
-            if (NextToken != endOfFileToken)
-                NextToken = 0;
-        }
-
-        private void Reduce( int ruleNumber ) {
-#if TRACE_ACTIONS
-				DisplayRule(ruleNumber);
-#endif
-            Rule rule = rules[ruleNumber];
-            int rhLen = rule.RightHandSide.Length;
-            //
-            //  Default actions for unit productions.
-            //
-            if (rhLen == 1) {
-                CurrentSemanticValue = valueStack.TopElement();   // Default action: $$ = $1;
-                CurrentLocationSpan = LocationStack.TopElement(); // Default action "@$ = @1;
-            }
-            else if (rhLen == 0) {
-                // Create a new blank value.
-                // Explicit semantic action may mutate this value
-                CurrentSemanticValue = default( TValue );
-                // The location span for an empty production will start with the
-                // beginning of the next lexeme, and end with the finish of the
-                // previous lexeme.  This gives the correct behaviour when this
-                // nonsense value is used in later Merge operations.
-                CurrentLocationSpan = (scanner.yylloc != null && LastSpan != null ?
-                    scanner.yylloc.Merge( LastSpan ) :
-                    default( TSpan ));
-            }
-            else {
-                // Default action: $$ = $1;
-                CurrentSemanticValue = valueStack[LocationStack.Depth - rhLen];
-                //  Default action "@$ = @1.Merge(@N)" for location info.
-                TSpan at1 = LocationStack[LocationStack.Depth - rhLen];
-                TSpan atN = LocationStack[LocationStack.Depth - 1];
-                CurrentLocationSpan =
-                    ((at1 != null && atN != null) ? at1.Merge( atN ) : default( TSpan ));
-            }
-
-            DoAction( ruleNumber );
-
-            for (int i = 0; i < rule.RightHandSide.Length; i++) {
-                StateStack.Pop();
-                valueStack.Pop();
-                LocationStack.Pop();
-            }
-            FsaState = StateStack.TopElement();
-
-            if (FsaState.Goto.ContainsKey( rule.LeftHandSide ))
-                FsaState = states[FsaState.Goto[rule.LeftHandSide]];
-
-            StateStack.Push( FsaState );
-            valueStack.Push( CurrentSemanticValue );
-            LocationStack.Push( CurrentLocationSpan );
-        }
-
-        /// <summary>
-        /// Execute the selected action from array.
-        /// Must be overriden in derived classes.
-        /// </summary>
-        /// <param name="actionNumber">Index of the action to perform</param>
-        protected abstract void DoAction( int actionNumber );
-
-        private bool ErrorRecovery() {
-            bool discard;
-
-            if (!recovering) // if not recovering from previous error
-                ReportError();
-
-            if (!FindErrorRecoveryState())
-                return false;
-            //
-            //  The interim fix for the "looping in error recovery"
-            //  artifact involved moving the setting of the recovering 
-            //  bool until after invalid tokens have been discarded.
-            //
-            ShiftErrorToken();
-            discard = DiscardInvalidTokens();
-            recovering = true;
-            tokensSinceLastError = 0;
-            return discard;
-        }
-
-        private void ReportError() {
-            StringBuilder errorMsg = new StringBuilder();
-            errorMsg.AppendFormat( "Syntax error, unexpected {0}", TerminalToString( NextToken ) );
-
-            if (FsaState.ParserTable.Count < 7) {
-                bool first = true;
-                foreach (int terminal in FsaState.ParserTable.Keys) {
-                    if (first)
-                        errorMsg.Append( ", expecting " );
-                    else
-                        errorMsg.Append( ", or " );
-
-                    errorMsg.Append( TerminalToString( terminal ) );
-                    first = false;
-                }
-            }
-            scanner.yyerror( errorMsg.ToString() );
-        }
-
-        private void ShiftErrorToken() {
-            int old_next = NextToken;
-            NextToken = errorToken;
-
-            Shift( FsaState.ParserTable[NextToken] );
-
-#if TRACE_ACTIONS
-				Console.Error.WriteLine("Entering state {0} ", FsaState.number);
-#endif
-            NextToken = old_next;
-        }
-
-        private bool FindErrorRecoveryState() {
-            while (true)    // pop states until one found that accepts error token
-            {
-                if (FsaState.ParserTable != null &&
-                    FsaState.ParserTable.ContainsKey( errorToken ) &&
-                    FsaState.ParserTable[errorToken] > 0) // shift
-                    return true;
-
-#if TRACE_ACTIONS
-					Console.Error.WriteLine("Error: popping state {0}", StateStack.TopElement().number);
-#endif
-                StateStack.Pop();
-                valueStack.Pop();
-                LocationStack.Pop();
-
-#if TRACE_ACTIONS
-			    DisplayStack();
-#endif
-                if (StateStack.IsEmpty()) {
-#if TRACE_ACTIONS
-                        Console.Error.WriteLine("Aborting: didn't find a state that accepts error token");
-#endif
-                    return false;
-                }
-                else
-                    FsaState = StateStack.TopElement();
-            }
-        }
-
-        private bool DiscardInvalidTokens() {
-
-            int action = FsaState.defaultAction;
-
-            if (FsaState.ParserTable != null) {
-                // Discard tokens until find one that works ...
-                while (true) {
-                    if (NextToken == 0) {
-#if TRACE_ACTIONS
-                            Console.Error.Write("Reading a token: ");
-#endif
-                        NextToken = scanner.yylex();
-                    }
-#if TRACE_ACTIONS
-                        Console.Error.WriteLine("Next token is {0}", TerminalToString(NextToken));
-#endif
-                    if (NextToken == endOfFileToken)
-                        return false;
-
-                    if (FsaState.ParserTable.ContainsKey( NextToken ))
-                        action = FsaState.ParserTable[NextToken];
-
-                    if (action != 0)
-                        return true;
-                    else {
-#if TRACE_ACTIONS
-                            Console.Error.WriteLine("Error: Discarding {0}", TerminalToString(NextToken));
-#endif
-                        NextToken = 0;
-                    }
-                }
-            }
-            else if (recovering && tokensSinceLastError == 0) {
-                // 
-                //  Boolean recovering is not set until after the first
-                //  error token has been shifted.  Thus if we get back 
-                //  here with recovering set and no tokens read we are
-                //  looping on the same error recovery action.  This 
-                //  happens if current_state.ParserTable is null because
-                //  the state has an LR(0) reduction, but not all
-                //  lookahead tokens are valid.  This only occurs for
-                //  error productions that *end* on "error".
-                //
-                //  This action discards tokens one at a time until
-                //  the looping stops.  Another attack would be to always
-                //  use the LALR(1) table if a production ends on "error"
-                //
-#if TRACE_ACTIONS
-                    Console.Error.WriteLine("Error: panic discard of {0}", TerminalToString(NextToken));
-#endif
-                if (NextToken == endOfFileToken)
-                    return false;
-                NextToken = 0;
-                return true;
-            }
-            else
-                return true;
-        }
-
-        /// <summary>
-        /// Traditional YACC method.  Discards the next input token.
-        /// </summary>
-        [SuppressMessage( "Microsoft.Naming", "CA1709:IdentifiersShouldBeCasedCorrectly", MessageId = "yyclearin" )]
-        [SuppressMessage( "Microsoft.Naming", "CA1704:IdentifiersShouldBeSpelledCorrectly", MessageId = "yyclearin" )]
-        // Reason for FxCop message suppression -
-        // This is a traditional name for YACC-like functionality
-        protected void yyclearin() { NextToken = 0; }
-
-        /// <summary>
-        /// Tradional YACC method. Clear the "recovering" flag.
-        /// </summary>
-        [SuppressMessage( "Microsoft.Naming", "CA1709:IdentifiersShouldBeCasedCorrectly", MessageId = "yyerrok" )]
-        [SuppressMessage( "Microsoft.Naming", "CA1704:IdentifiersShouldBeSpelledCorrectly", MessageId = "yyerrok" )]
-        // Reason for FxCop message suppression -
-        // This is a traditional name for YACC-like functionality
-        protected void yyerrok() { recovering = false; }
-
-        /// <summary>
-        /// OBSOLETE FOR VERSION 1.4.0
-        /// Method used by derived types to insert new
-        /// state instances in the "states" array.
-        /// </summary>
-        /// <param name="stateNumber">index of the state</param>
-        /// <param name="state">data for the state</param>
-        protected void AddState( int stateNumber, State state ) {
-            states[stateNumber] = state;
-            state.number = stateNumber;
-        }
-
-        private void DisplayStack() {
-            Console.Error.Write( "State stack is now:" );
-            for (int i = 0; i < StateStack.Depth; i++)
-                Console.Error.Write( " {0}", StateStack[i].number );
-            Console.Error.WriteLine();
-        }
-
-        private void DisplayRule( int ruleNumber ) {
-            Console.Error.Write( "Reducing stack by rule {0}, ", ruleNumber );
-            DisplayProduction( rules[ruleNumber] );
-        }
-
-        private void DisplayProduction( Rule rule ) {
-            if (rule.RightHandSide.Length == 0)
-                Console.Error.Write( "/* empty */ " );
-            else
-                foreach (int symbol in rule.RightHandSide)
-                    Console.Error.Write( "{0} ", SymbolToString( symbol ) );
-
-            Console.Error.WriteLine( "-> {0}", SymbolToString( rule.LeftHandSide ) );
-        }
-
-        /// <summary>
-        /// Abstract state class naming terminal symbols.
-        /// This is overridden by derived classes with the
-        /// name (or alias) to be used in error messages.
-        /// </summary>
-        /// <param name="terminal">The terminal ordinal</param>
-        /// <returns></returns>
-        protected abstract string TerminalToString( int terminal );
-
-        private string SymbolToString( int symbol ) {
-            if (symbol < 0)
-                return nonTerminals[-symbol - 1];
-            else
-                return TerminalToString( symbol );
-        }
-
-        /// <summary>
-        /// Return text representation of argument character
-        /// </summary>
-        /// <param name="input">The character to convert</param>
-        /// <returns>String representation of the character</returns>
-        protected static string CharToString( char input ) {
-            switch (input) {
-                case '\a': return @"'\a'";
-                case '\b': return @"'\b'";
-                case '\f': return @"'\f'";
-                case '\n': return @"'\n'";
-                case '\r': return @"'\r'";
-                case '\t': return @"'\t'";
-                case '\v': return @"'\v'";
-                case '\0': return @"'\0'";
-                default: return string.Format( CultureInfo.InvariantCulture, "'{0}'", input );
-            }
-        }
-    }
-
-    /// <summary>
-    /// Classes implementing this interface must supply a
-    /// method that merges two location objects to return
-    /// a new object of the same type.
-    /// GPPG-generated parsers have the default location
-    /// action equivalent to "@$ = @1.Merge(@N);" where N
-    /// is the right-hand-side length of the production.
-    /// </summary>
-    /// <typeparam name="TSpan">The Location type</typeparam>
-#if EXPORT_GPPG
-    public interface IMerge<TSpan>
-#else
-    internal interface IMerge<TSpan>
-#endif
- {
-        /// <summary>
-        /// Interface method that creates a location object from
-        /// the current and last object.  Typically used to create
-        /// a location object extending from the start of the @1
-        /// object to the end of the @N object.
-        /// </summary>
-        /// <param name="last">The lexically last object to merge</param>
-        /// <returns>The merged location object</returns>
-        TSpan Merge( TSpan last );
-    }
-
-    /// <summary>
-    /// This is the default class that carries location
-    /// information from the scanner to the parser.
-    /// If you don't declare "%YYLTYPE Foo" the parser
-    /// will expect to deal with this type.
-    /// </summary>
-#if EXPORT_GPPG
-    public class LexLocation : IMerge<LexLocation>
-#else
-    [SuppressMessage( "Microsoft.Performance", "CA1812:AvoidUninstantiatedInternalClasses" )]
-    internal class LexLocation : IMerge<LexLocation>
-#endif
- {
-        private int startLine;   // start line
-        private int startColumn; // start column
-        private int endLine;     // end line
-        private int endColumn;   // end column
-
-        /// <summary>
-        /// The line at which the text span starts.
-        /// </summary>
-        public int StartLine { get { return startLine; } }
-
-        /// <summary>
-        /// The column at which the text span starts.
-        /// </summary>
-        public int StartColumn { get { return startColumn; } }
-
-        /// <summary>
-        /// The line on which the text span ends.
-        /// </summary>
-        public int EndLine { get { return endLine; } }
-
-        /// <summary>
-        /// The column of the first character
-        /// beyond the end of the text span.
-        /// </summary>
-        public int EndColumn { get { return endColumn; } }
-
-        /// <summary>
-        /// Default no-arg constructor.
-        /// </summary>
-        public LexLocation() { }
-
-        /// <summary>
-        /// Constructor for text-span with given start and end.
-        /// </summary>
-        /// <param name="sl">start line</param>
-        /// <param name="sc">start column</param>
-        /// <param name="el">end line </param>
-        /// <param name="ec">end column</param>
-        public LexLocation( int sl, int sc, int el, int ec ) { startLine = sl; startColumn = sc; endLine = el; endColumn = ec; }
-
-        /// <summary>
-        /// Create a text location which spans from the 
-        /// start of "this" to the end of the argument "last"
-        /// </summary>
-        /// <param name="last">The last location in the result span</param>
-        /// <returns>The merged span</returns>
-        public LexLocation Merge( LexLocation last ) { return new LexLocation( this.startLine, this.startColumn, last.endLine, last.endColumn ); }
-    }
-
-    /// <summary>
-    /// Abstract scanner class that GPPG expects its scanners to 
-    /// extend.
-    /// </summary>
-    /// <typeparam name="TValue">Semantic value type YYSTYPE</typeparam>
-    /// <typeparam name="TSpan">Source location type YYLTYPE</typeparam>
-#if EXPORT_GPPG
-    public abstract class AbstractScanner<TValue, TSpan>
-#else
-    internal abstract class AbstractScanner<TValue, TSpan>
-#endif
- where TSpan : IMerge<TSpan> {
-        /// <summary>
-        /// Lexical value optionally set by the scanner. The value
-        /// is of the %YYSTYPE type declared in the parser spec.
-        /// </summary>
-        [SuppressMessage( "Microsoft.Design", "CA1051:DoNotDeclareVisibleInstanceFields" )]
-        [SuppressMessage( "Microsoft.Naming", "CA1709:IdentifiersShouldBeCasedCorrectly", MessageId = "yylval" )]
-        [SuppressMessage( "Microsoft.Naming", "CA1704:IdentifiersShouldBeSpelledCorrectly", MessageId = "yylval" )]
-        // Reason for FxCop message suppression -
-        // This is a traditional name for YACC-like functionality
-        // A field must be declared for this value of parametric type,
-        // since it may be instantiated by a value struct.  If it were 
-        // implemented as a property, machine generated code in derived
-        // types would not be able to select on the returned value.
-#pragma warning disable 649
-        public TValue yylval;                     // Lexical value: set by scanner
-#pragma warning restore 649
-
-        /// <summary>
-        /// Current scanner location property. The value is of the
-        /// type declared by %YYLTYPE in the parser specification.
-        /// </summary>
-        [SuppressMessage( "Microsoft.Naming", "CA1709:IdentifiersShouldBeCasedCorrectly", MessageId = "yylloc" )]
-        [SuppressMessage( "Microsoft.Naming", "CA1704:IdentifiersShouldBeSpelledCorrectly", MessageId = "yylloc" )]
-        // Reason for FxCop message suppression -
-        // This is a traditional name for YACC-like functionality
-        public virtual TSpan yylloc {
-            get { return default( TSpan ); }       // Empty implementation allowing
-            set { /* skip */ }                   // yylloc to be ignored entirely.
-        }
-
-        /// <summary>
-        /// Main call point for LEX-like scanners.  Returns an int
-        /// corresponding to the token recognized by the scanner.
-        /// </summary>
-        /// <returns>An int corresponding to the token</returns>
-        [SuppressMessage( "Microsoft.Naming", "CA1709:IdentifiersShouldBeCasedCorrectly", MessageId = "yylex" )]
-        [SuppressMessage( "Microsoft.Naming", "CA1704:IdentifiersShouldBeSpelledCorrectly", MessageId = "yylex" )]
-        // Reason for FxCop message suppression -
-        // This is a traditional name for YACC-like functionality
-        public abstract int yylex();
-
-        /// <summary>
-        /// Traditional error reporting provided by LEX-like scanners
-        /// to their YACC-like clients.
-        /// </summary>
-        /// <param name="format">Message format string</param>
-        /// <param name="args">Optional array of args</param>
-        [SuppressMessage( "Microsoft.Naming", "CA1709:IdentifiersShouldBeCasedCorrectly", MessageId = "yyerror" )]
-        [SuppressMessage( "Microsoft.Naming", "CA1704:IdentifiersShouldBeSpelledCorrectly", MessageId = "yyerror" )]
-        // Reason for FxCop message suppression -
-        // This is a traditional name for YACC-like functionality
-        public virtual void yyerror( string format, params object[] args ) { }
-    }
-
-    /// <summary>
-    /// Encapsulated state for the parser.
-    /// Opaque to users, visible to the tool-generated code.
-    /// </summary>
-#if EXPORT_GPPG
-    public class State
-    {
-        /// <summary>
-        /// The number of states in the automaton.
-        /// </summary>
-        public int number;
-#else
-    internal class State {
-        /// <summary>
-        /// The index of this state in the states array.
-        /// </summary>
-        internal int number;
-#endif
-        internal Dictionary<int, int> ParserTable;   // Terminal -> ParseAction
-        internal Dictionary<int, int> Goto;          // NonTerminal -> State;
-        internal int defaultAction; // = 0;		     // ParseAction
-
-        /// <summary>
-        /// State transition data for this state. Pairs of elements of the 
-        /// goto array associate symbol ordinals with next state indices.
-        /// The actions array is passed to another constructor. 
-        /// </summary>
-        /// <param name="actions">The action list</param>c
-        /// <param name="goToList">Next state data</param>
-        public State( int[] actions, int[] goToList )
-            : this( actions ) {
-            Goto = new Dictionary<int, int>();
-            for (int i = 0; i < goToList.Length; i += 2)
-                Goto.Add( goToList[i], goToList[i + 1] );
-        }
-
-        /// <summary>
-        /// Action data for this state. Pairs of elements of the 
-        /// action array associate action ordinals with each of
-        /// those symbols that have actions in the current state.
-        /// </summary>
-        /// <param name="actions">The action array</param>
-        public State( int[] actions ) {
-            ParserTable = new Dictionary<int, int>();
-            for (int i = 0; i < actions.Length; i += 2)
-                ParserTable.Add( actions[i], actions[i + 1] );
-        }
-
-        /// <summary>
-        /// Set the default action for this state.
-        /// </summary>
-        /// <param name="defaultAction">Ordinal of the default action</param>
-        public State( int defaultAction ) {
-            this.defaultAction = defaultAction;
-        }
-
-        /// <summary>
-        /// Set the default action and the state transition table.
-        /// </summary>
-        /// <param name="defaultAction">The default action</param>
-        /// <param name="goToList">Transitions from this state</param>
-        public State( int defaultAction, int[] goToList )
-            : this( defaultAction ) {
-            Goto = new Dictionary<int, int>();
-            for (int i = 0; i < goToList.Length; i += 2)
-                Goto.Add( goToList[i], goToList[i + 1] );
-        }
-    }
-
-    /// <summary>
-    /// Rule representation at runtime.
-    /// </summary>
-#if EXPORT_GPPG
-    public class Rule
-#else
-    internal class Rule
-#endif
- {
-        internal int LeftHandSide; // symbol
-        internal int[] RightHandSide; // symbols
-
-        /// <summary>
-        /// Rule constructor.  This holds the ordinal of
-        /// the left hand side symbol, and the list of
-        /// right hand side symbols, in lexical order.
-        /// </summary>
-        /// <param name="left">The LHS non-terminal</param>
-        /// <param name="right">The RHS symbols, in lexical order</param>
-        public Rule( int left, int[] right ) {
-            this.LeftHandSide = left;
-            this.RightHandSide = right;
-        }
-    }
-
-    /// <summary>
-    /// Stack utility for the shift-reduce parser.
-    /// GPPG parsers have three instances:
-    /// (1) The parser state stack, T = QUT.Gppg.State,
-    /// (2) The semantic value stack, T = TValue,
-    /// (3) The location stack, T = TSpan.
-    /// </summary>
-    /// <typeparam name="T"></typeparam>
-#if EXPORT_GPPG
-    public class PushdownPrefixState<T>
-#else
-    internal class PushdownPrefixState<T>
-#endif
- {
-        //  Note that we cannot use the BCL Stack<T> class
-        //  here as derived types need to index into stacks.
-        //
-        private T[] array = new T[8];
-        private int tos = 0;
-
-        /// <summary>
-        /// Indexer for values of the stack below the top.
-        /// </summary>
-        /// <param name="index">index of the element, starting from the bottom</param>
-        /// <returns>the selected element</returns>
-        public T this[int index] { get { return array[index]; } }
-
-        /// <summary>
-        /// The current depth of the stack.
-        /// </summary>
-        public int Depth { get { return tos; } }
-
-        internal void Push( T value ) {
-            if (tos >= array.Length) {
-                T[] newarray = new T[array.Length * 2];
-                System.Array.Copy( array, newarray, tos );
-                array = newarray;
-            }
-            array[tos++] = value;
-        }
-
-        internal T Pop() {
-            T rslt = array[--tos];
-            array[tos] = default( T );
-            return rslt;
-        }
-
-        internal T TopElement() { return array[tos - 1]; }
-
-        internal bool IsEmpty() { return tos == 0; }
-    }
-}
-
@@ -1,45 +0,0 @@
-namespace Bts.ArithmeticExpressions;
-
-using System.Numerics;
-
-class Sum : IArithmeticExpression<double> {
-   readonly IArithmeticExpression left;
-   readonly IArithmeticExpression right;
-
-   public Sum(IArithmeticExpression left, IArithmeticExpression right) {
-      this.left = left;
-      this.right = right;
-   }
-
-   public static Sum<T, T, T> Create<T>(
-      IArithmeticExpression<T> left, IArithmeticExpression<T> right)
-      where T : INumber<T>, IAdditionOperators<T, T, T> =>
-      new(left, right);
-
-   public double Evaluate(IDictionary<string, object?> env) =>
-      evaluateArg(left, nameof(left), env) + evaluateArg(right, nameof(right), env);
-
-   static double evaluateArg(
-      IArithmeticExpression expr, string name, IDictionary<string, object?> env) {
-      var obj = expr.Evaluate(env);
-      return ConvertUtils.try_convert(expr.Evaluate(env), out double dbl) ? dbl :
-         throw new Exception(
-            $"Invalid Sum. {name} is of type {obj?.GetType()} (expected {typeof(double)})");
-   }
-}
-
-class Sum<TLeft, TRight, TResult> : IArithmeticExpression<TResult>
-   where TLeft : INumber<TLeft>, IAdditionOperators<TLeft, TRight, TResult>
-   where TRight : INumber<TRight>
-   where TResult : INumber<TResult> {
-   readonly IArithmeticExpression<TLeft> left;
-   readonly IArithmeticExpression<TRight> right;
-
-   public Sum(IArithmeticExpression<TLeft> left, IArithmeticExpression<TRight> right) {
-      this.left = left;
-      this.right = right;
-   }
-
-   public TResult Evaluate(IDictionary<string, object?> env) =>
-      left.Evaluate(env) + right.Evaluate(env);
-}
@@ -1,4 +0,0 @@
-global using System;
-global using System.Linq;
-global using System.Collections.Generic;
-global using System.Collections.Immutable;
@@ -1,15 +0,0 @@
-namespace Bts.ArithmeticExpressions;
-
-using System.Collections.Generic;
-
-class Variable : IArithmeticExpression {
-   readonly string identifier;
-
-   public Variable(string identifier) =>
-      this.identifier = identifier;
-
-   public object? Evaluate(IDictionary<string, object?> env) =>
-      env.TryGetValue(identifier, out var val) ? val :
-         throw new KeyNotFoundException(
-            $"Failed to find {nameof(Variable)} '{identifier}'");
-}
@@ -1,13 +0,0 @@
-<Project Sdk="Microsoft.NET.Sdk">
-
-  <PropertyGroup>
-    <TargetFramework>net7.0</TargetFramework>
-    <ImplicitUsings>enable</ImplicitUsings>
-    <Nullable>enable</Nullable>
-  </PropertyGroup>
-
-  <ItemGroup>
-    <ProjectReference Include="..\..\client\spark_core\spark_core.csproj" />
-  </ItemGroup>
-
-</Project>
@@ -1,41 +0,0 @@
-using mbts.spark;
-
-using System;
-using System.Runtime;
-
-namespace BCG.Utilities.General
-{
-	/// <summary>
-	/// Summary description for Crono.
-	/// </summary>
-	public class Crono
-	{
-      public Crono()
-      {
-         myTimer = new HighPerformanceTimer();
-      }
-
-      public void start() 
-      {myTimer.start();}
-
-      public void stop()
-      {myTimer.stop();}
-
-      public TimeSpan time
-      {
-         get 
-         {
-            return new TimeSpan((long) (myTimer.totalMilliseconds * TimeSpan.TicksPerMillisecond));
-         }
-      }
-
-      public double miliseconds
-      {
-         get
-         {return myTimer.totalMilliseconds;}
-      }
-
-      private HighPerformanceTimer myTimer;
-	}
-
-}
@@ -1,60 +0,0 @@
-using System;
-using Microsoft.Win32;
-
-namespace BCG
-{
-   internal static class ArrayRegistryHandler
-   {
-      public static void setValue (RegistryKey rk, string name, Array array)
-      {
-         rk.SetValue (name, array.Length);
-         Type t = array.GetType ().GetElementType ();
-
-         for (int i = 0; i < array.Length; i++)
-         {
-            if (t == typeof (int))
-               rk.SetValue (string.Concat (name, i.ToString ()), (int) array.GetValue (i));
-            else if (t == typeof (bool))
-               rk.SetValue (string.Concat (name, i.ToString ()), (bool) array.GetValue (i));
-            else
-               rk.SetValue (string.Concat (name, i.ToString ()), array.GetValue (i));
-         }
-      }
-
-      public static Array getValue (RegistryKey rk, string name, Type elementType)
-      {
-         object c = rk.GetValue (name, 0);
-         int count = (int) c;
-
-         Array result;
-
-         if (elementType == typeof (int) || elementType == typeof (System.Int32))
-            result = new int[count];
-         else if (elementType == typeof (bool))
-            result = new bool[count];
-         else if (elementType == typeof (double))
-            result = new double[count];
-         else if (elementType == typeof (DateTime))
-            result = new DateTime[count];
-         else
-            result = new string[count];
-
-         for (int i = 0; i < count; i++)
-         {
-            object val = rk.GetValue (string.Concat (name, i.ToString ()));
-            if (elementType == typeof (int) || elementType == typeof (System.Int32))
-               result.SetValue (int.Parse (val.ToString ()), i);
-            else if (elementType == typeof (bool))
-               result.SetValue (bool.Parse (val.ToString ()), i);
-            else if (elementType == typeof (double))
-               result.SetValue (double.Parse (val.ToString ()), i);
-            else if (elementType == typeof (DateTime))
-               result.SetValue (DateTime.Parse (val.ToString ()), i);
-            else
-               result.SetValue (val.ToString (), i);
-         }
-
-         return result;
-      }
-   }
-}
@@ -1,192 +0,0 @@
-using System;
-using System.Collections;
-using System.Collections.Generic;
-using System.Collections.Concurrent;
-using System.Reflection;
-using Microsoft.Win32;
-
-namespace BCG
-{
-   public enum RegistryRoot { HKCU, HKLM }
-
-   [Serializable]
-   public class BlueRegistry
-   {
-      public const string BlueSubKey = @"Software\Blue Capital Group\";
-      public static readonly string ApplicationPrefix;
-      protected string myFullPath;
-
-      public BlueRegistry(string subPath)
-      {
-         myFullPath = string.Concat(BlueRegistry.ApplicationPrefix, @"\", subPath);
-      }
-
-      public BlueRegistry(BlueRegistry parent, string subPath)
-      {
-         myFullPath = string.Concat(parent.myFullPath, @"\", subPath);
-      }
-
-      static BlueRegistry()
-      {
-         string app = "Applications";
-
-         Assembly ass = Assembly.GetEntryAssembly();
-         if (ass != null)
-         {
-            app = ass.GetName().Name;
-
-            object[] attrs = ass.GetCustomAttributes(
-               Type.GetType("System.Reflection.AssemblyTitleAttribute"), true);
-
-            if (attrs.Length > 0 && ((AssemblyTitleAttribute)attrs[0]).Title != string.Empty)
-            {
-               app = ((AssemblyTitleAttribute)attrs[0]).Title;
-            }
-         }
-
-         ApplicationPrefix = string.Concat(BlueRegistry.BlueSubKey, app);
-      }
-
-      public object getValue(string name)
-      {
-         return getValue(RegistryRoot.HKCU, name);
-      }
-
-      public object getValue(string name, object defaultValue)
-      {
-         return getValue(RegistryRoot.HKCU, name, defaultValue);
-      }
-
-      public void setValue(string name, object value)
-      {
-         setValue(RegistryRoot.HKCU, name, value);
-      }
-
-      public void deleteValue(string name)
-      {
-         deleteValue(RegistryRoot.HKCU, name);
-      }
-
-      private RegistryKey myGetRegistryKey(RegistryRoot root)
-      {
-         if (root == RegistryRoot.HKCU)
-            return Registry.CurrentUser.CreateSubKey(myFullPath);
-         else
-            return Registry.LocalMachine.CreateSubKey(myFullPath);
-      }
-
-      #region Generic Methods
-      internal virtual void setValue(RegistryRoot root, string name, object value)
-      {
-         using (RegistryKey rk = myGetRegistryKey(root))
-         {
-            rk.SetValue(name, value);
-         }
-      }
-
-      internal virtual object getValue(RegistryRoot root, string name)
-      {
-         using (RegistryKey rk = myGetRegistryKey(root))
-         {
-            return rk.GetValue(name);
-         }
-      }
-
-      internal virtual void deleteValue(RegistryRoot root, string name)
-      {
-         using (RegistryKey rk = myGetRegistryKey(root))
-         {
-            rk.DeleteValue(name);
-         }
-      }
-
-      internal virtual object getValue(RegistryRoot root, string name, object defaultValue)
-      {
-         using (RegistryKey rk = myGetRegistryKey(root))
-         {
-            return rk.GetValue(name, defaultValue);
-         }
-      }
-      #endregion
-
-      #region Double
-      internal virtual void setDouble(RegistryRoot root, string name, double value)
-      {
-         using (RegistryKey rk = myGetRegistryKey(root))
-         {
-            DoubleRegistryHandler.setValue(rk, name, value);
-         }
-      }
-
-      internal virtual double getDouble(RegistryRoot root, string name)
-      {
-         using (RegistryKey rk = myGetRegistryKey(root))
-         {
-            return DoubleRegistryHandler.getValue(rk, name);
-         }
-      }
-      #endregion
-
-      #region Enum
-      internal virtual void setEnum(RegistryRoot root, string name, Enum value)
-      {
-         using (RegistryKey rk = myGetRegistryKey(root))
-         {
-            EnumRegistryHandler.setValue(rk, name, value);
-         }
-      }
-
-      internal virtual Enum getEnum(RegistryRoot root, string name, Type enumType)
-      {
-         using (RegistryKey rk = myGetRegistryKey(root))
-         {
-            return EnumRegistryHandler.getValue(rk, name, enumType);
-         }
-      }
-      #endregion
-
-      #region Array
-      internal virtual void setArray(RegistryRoot root, string name, Array array)
-      {
-         using (RegistryKey rk = myGetRegistryKey(root))
-         {
-            ArrayRegistryHandler.setValue(rk, name, array);
-         }
-      }
-
-      internal virtual Array getArray(RegistryRoot root, string name, Type elementType)
-      {
-         using (RegistryKey rk = myGetRegistryKey(root))
-         {
-            return ArrayRegistryHandler.getValue(rk, name, elementType);
-         }
-      }
-      #endregion
-
-      #region SortedList
-      internal virtual void setSortedList(RegistryRoot root, string name, SortedList slist)
-      {
-         using (RegistryKey rk = myGetRegistryKey(root))
-         {
-            SortedListRegistryHandler.setValue(rk, name, slist);
-         }
-      }
-
-      internal virtual SortedList getSortedList(RegistryRoot root, string name)
-      {
-         using (RegistryKey rk = myGetRegistryKey(root))
-         {
-            return SortedListRegistryHandler.getValue(rk, name);
-         }
-      }
-
-      internal virtual void deleteSortedList(RegistryRoot root, string name)
-      {
-         using (RegistryKey rk = myGetRegistryKey(root))
-         {
-            SortedListRegistryHandler.deleteValue(rk, name);
-         }
-      }
-      #endregion
-   }
-}
@@ -1,10 +0,0 @@
-<Project Sdk="Microsoft.NET.Sdk">
-
-  <PropertyGroup>
-    <TargetFramework>net7.0-windows</TargetFramework>
-    <ImplicitUsings>enable</ImplicitUsings>
-    <Nullable>enable</Nullable>
-    <UseWindowsForms>true</UseWindowsForms>
-  </PropertyGroup>
-
-</Project>
@@ -1,22 +0,0 @@
-using System;
-using Microsoft.Win32;
-
-namespace BCG
-{
-   internal static class DoubleRegistryHandler
-   {
-      public static void setValue (RegistryKey rk, string name, double value)
-      {
-         rk.SetValue (name, value.ToString ());
-      }
-
-      public static double getValue (RegistryKey rk, string name)
-      {
-         object v = rk.GetValue (name);
-         if (v != null) 
-            return double.Parse (v.ToString ());
-         else
-            return double.NaN;
-      }
-   }
-}
@@ -1,22 +0,0 @@
-using System;
-using Microsoft.Win32;
-
-namespace BCG
-{
-   internal static class EnumRegistryHandler
-   {
-      public static void setValue (RegistryKey rk, string name, Enum value)
-      {
-         rk.SetValue (name, value.ToString ());
-      }
-
-      public static Enum getValue (RegistryKey rk, string name, Type enumType)
-      {
-         object v = rk.GetValue (name);
-         if (v != null)
-            return (Enum) Enum.Parse (enumType, v.ToString ());
-         else
-            return null;
-      }
-   }
-}
@@ -1,166 +0,0 @@
-using System;
-using System.Reflection;
-using System.Windows.Forms;
-using System.Drawing;
-using System.Diagnostics;
-using Microsoft.Win32;
-
-namespace BCG
-{
-   public class PersistWindowState
-   {
-      // event info that allows form to persist extra window state data
-      public delegate void WindowStateHandler (object sender, BlueRegistry bluereg);
-      public event WindowStateHandler LoadState;
-      public event WindowStateHandler SaveState;
-
-      private Form myParent;
-      private BlueRegistry myRegistry;
-
-      private int myNormalLeft;
-      private int myNormalTop;
-      private int myNormalWidth;
-      private int myNormalHeight;
-      private bool myResizable = true;
-      private FormWindowState myWindowState;
-      private bool myAllowSaveMinimized = false;
-      private bool mySavePosition = true;
-      private bool mySaveState = true;
-
-      public PersistWindowState (bool savePosition)
-      {
-         mySavePosition = savePosition;
-      }
-
-      public PersistWindowState ()
-      {
-      }
-
-      public bool saveState
-      {
-         [DebuggerStepThrough]
-         set { mySaveState = value; }
-      }
-
-      public Form parent
-      {
-         [DebuggerStepThrough]
-         get { return myParent; }
-         set
-         {
-            myParent = value;
-            myRegistry = new BlueRegistry (myParent.Text);
-
-            // subscribe to parent form's events
-            myParent.Closing += new System.ComponentModel.CancelEventHandler(myOnClosing);
-            myParent.Resize += new System.EventHandler(myOnResize);
-            myParent.Move += new System.EventHandler(myOnMove);
-            myParent.Load += new System.EventHandler(myOnLoad);
-
-            // get initial width and height in case form is never resized
-            myNormalWidth = myParent.Width;
-            myNormalHeight = myParent.Height;
-         }
-      }
-
-      public BlueRegistry blueRegistry
-      {
-         [DebuggerStepThrough]
-         get { return myRegistry; }
-         [DebuggerStepThrough]
-         set { myRegistry = value; }
-      }
-
-      public bool resizable
-      {
-         [DebuggerStepThrough]
-         set { myResizable = value; }
-      }
-
-      public bool allowSaveMinimized
-      {
-         [DebuggerStepThrough]
-         set { myAllowSaveMinimized = value; }
-      }
-
-      private void myOnResize(object sender, System.EventArgs e)
-      {
-         // save width and height
-         if (myParent.WindowState == FormWindowState.Normal && myResizable)
-         {
-            myNormalWidth = myParent.Width;
-            myNormalHeight = myParent.Height;
-         }
-      }
-
-      private void myOnMove(object sender, System.EventArgs e)
-      {
-         // save position
-         if(myParent.WindowState == FormWindowState.Normal)
-         {
-            myNormalLeft = myParent.Left;
-            myNormalTop = myParent.Top;
-         }
-         // save state
-         myWindowState = myParent.WindowState;
-      }
-
-      private void myOnClosing(object sender, System.ComponentModel.CancelEventArgs e)
-      {
-         // save position, size and state
-         if (mySavePosition)
-         {
-            myRegistry.setValue (RegistryRoot.HKCU, "Left", myNormalLeft);
-            myRegistry.setValue (RegistryRoot.HKCU, "Top", myNormalTop);
-         }
-
-         if (myResizable)
-         {
-            myRegistry.setValue (RegistryRoot.HKCU, "Width", myNormalWidth);
-            myRegistry.setValue (RegistryRoot.HKCU, "Height", myNormalHeight);
-         }
-
-         // check if we are allowed to save the state as minimized (not normally)
-         if (!myAllowSaveMinimized)
-         {
-            if(myWindowState == FormWindowState.Minimized)
-               myWindowState = FormWindowState.Normal;
-         }
-
-         if (mySaveState)
-            myRegistry.setValue (RegistryRoot.HKCU, "WindowState", (int) myWindowState);
-        
-         // fire SaveState event
-         if (SaveState != null)
-            SaveState (this, myRegistry);
-      }
-
-      private void myOnLoad (object sender, System.EventArgs e)
-      {
-         if (mySavePosition)
-         {
-            int left = (int) myRegistry.getValue (RegistryRoot.HKCU, "Left", myParent.Left);
-            int top = (int) myRegistry.getValue (RegistryRoot.HKCU, "Top", myParent.Top);
-            myParent.Location = new Point (left, top);
-         }
-
-         if (myResizable)
-         {
-            int width = (int) myRegistry.getValue (RegistryRoot.HKCU, "Width", myParent.Width);
-            int height = (int) myRegistry.getValue (RegistryRoot.HKCU, "Height", myParent.Height);
-            myParent.Size = new Size (width, height);
-         }
-            
-         if (mySaveState)
-         {
-            FormWindowState windowState = (FormWindowState) myRegistry.getValue (RegistryRoot.HKCU, "WindowState", 
-               (int) myParent.WindowState);
-            myParent.WindowState = windowState;
-         }
-
-         // fire LoadState event
-         if(LoadState != null)
-            LoadState (this, myRegistry);
-      }
-   }
-}
@@ -1,58 +0,0 @@
-using System;
-using System.Collections;
-using Microsoft.Win32;
-
-namespace BCG
-{
-   internal static class SortedListRegistryHandler
-   {
-      public static void setValue (RegistryKey rk, string name, SortedList slist)
-      {
-         rk.SetValue (name, slist.Count);
-               
-         for (int i = 0; i < slist.Count; i++)
-         {
-            object key = slist.GetKey (i);
-            object val = slist.GetByIndex (i);
-            rk.SetValue (string.Concat (name, "_key", i.ToString ()), key);
-            rk.SetValue (string.Concat (name, "_val", i.ToString ()), val);
-         }
-      }
-
-      public static SortedList getValue (RegistryKey rk, string name)
-      {
-         object c = rk.GetValue (name, 0);
-
-         SortedList result = new SortedList ();
-         try
-         {
-            int count = (int) c;
-            for (int i = 0; i < count; i++)
-            {
-               object key = rk.GetValue (string.Concat (name, "_key", i.ToString ()));
-               object val = rk.GetValue (string.Concat (name, "_val", i.ToString ()));
-               result.Add (key, val);
-            }
-         }
-         catch (Exception)
-         {
-            result.Clear ();
-         }
-         return result;
-      }
-
-      public static void deleteValue (RegistryKey rk, string name)
-      {
-         object c = rk.GetValue (name, 0);
-         int count = (int) c;
-
-         for (int i = 0; i < count; i++)
-         {
-            rk.DeleteValue (string.Concat (name, "_key", i.ToString ()), false);
-            rk.DeleteValue (string.Concat (name, "_val", i.ToString ()), false);
-         }
-         
-         rk.DeleteValue (name, false);
-      }
-   }
-}
@@ -1,21 +0,0 @@
-namespace Bts.BooleanExpressions.Arguments;
-
-class Argument : IArgument {
-   readonly Func<IDictionary<string, object?>, object?> getValue;
-
-   public Argument(Func<IDictionary<string, object?>, object?> getValue) =>
-      this.getValue = getValue;
-
-   public object? GetValue(IDictionary<string, object?> env) =>
-      getValue(env);
-}
-
-class Argument<T> : IArgument<T> {
-   readonly Func<IDictionary<string, object?>, T> getValue;
-
-   public Argument(Func<IDictionary<string, object?>, T> getValue) =>
-      this.getValue = getValue;
-
-   public T GetValue(IDictionary<string, object?> env) =>
-      getValue(env);
-}
@@ -1,28 +0,0 @@
-namespace Bts.BooleanExpressions.Arguments;
-
-using bts;
-
-using Spark.Core.Collections;
-
-static class ArgumentComparer {
-   public static int Compare(
-      IArgument value1, IArgument value2, IDictionary<string,object?> env) {
-      if (value1 is null) {
-         throw new ArgumentNullException(nameof(value1));
-      }
-      if (value2 is null) {
-         throw new ArgumentNullException(nameof(value2));
-      }
-      var cmp1 = value1.Cast<IComparable>();
-      var cmp2 = value2.Cast<IComparable>();
-      try {
-         var v1 = cmp1.GetValue(env);
-         var v2 = cmp2.GetValue(env);
-         return v1.GetType().IsNumeric() ?
-            new NumericComparer().Compare(v1, v2) : v1.CompareTo(v2);
-      } catch (Exception ex) {
-         Log.Ui.error($"Comparison failed: {ex}");
-         throw;
-      }
-   }
-}
@@ -1,11 +0,0 @@
-namespace Bts.BooleanExpressions.Arguments;
-
-static class ArgumentExtensions {
-   public static IArgument<T> Cast<T>(this IArgument argument) =>
-      new Argument<T>(env => {
-         var obj = argument.GetValue(env);
-         return obj is T t ? t : throw new Exception(
-            $"Expected argument.GetValue to return instance of type {typeof(T)} " +
-            $"(actually {obj?.GetType()})");
-      });
-}
@@ -1,19 +0,0 @@
-namespace Bts.BooleanExpressions.Arguments;
-
-using System.Text.RegularExpressions;
-
-static class ArgumentMatcher {
-   public static bool Match(
-      IArgument arg1, IArgument arg2, IDictionary<string, object?> env) {
-      var lobj = arg1.GetValue(env);
-      var robj = arg2.GetValue(env);
-      if (DBNull.Value.Equals(lobj) && robj is string) {
-         return false;
-      }
-      if (lobj is string lstr && robj is string rstr) {
-         return Regex.IsMatch(lstr, rstr);
-      }
-      throw new Exception(
-         $"Type mismatch, cannot string match {lobj?.GetType()} with {robj?.GetType()}");
-   }
-}
@@ -1,16 +0,0 @@
-namespace Bts.BooleanExpressions.Arguments;
-
-static class Constant {
-   public static Constant<T> Create<T>(T value) =>
-      new(value);
-}
-
-class Constant<T> : IArgument<T> {
-   readonly T value;
-
-   public Constant(T value) =>
-      this.value = value;
-
-   public T GetValue(IDictionary<string, object?> env) =>
-      value;
-}
@@ -1,29 +0,0 @@
-namespace Bts.BooleanExpressions.Arguments;
-
-class Function : IArgument {
-   public const string FunctionPrefix = "function:";
-
-   readonly string name;
-   readonly IEnumerable<IArgument> args;
-
-   public Function(string name, IEnumerable<IArgument>? args = null) {
-      this.name = name;
-      this.args = args ?? Enumerable.Empty<IArgument>();
-   }
-
-   public delegate object? Delegate(List<object?> args);
-
-   public object? GetValue(IDictionary<string, object?> env) {
-      var argValues = args?.Select(a => a.GetValue(env))?.ToList() ?? new(0);
-
-      var k = FunctionPrefix + name;
-      if (!env.TryGetValue(k, out var fnObj)) {
-         throw new BooleanExpressionException($"Did not find function named '{name}'");
-      }
-      if (fnObj is not Delegate fn) {
-         throw new BooleanExpressionException(
-            $"Function {name} is not of type {typeof(Delegate)}");
-      }
-      return fn(argValues);
-   }
-}
@@ -1,12 +0,0 @@
-namespace Bts.BooleanExpressions;
-
-interface IArgument {
-   object? GetValue(IDictionary<string, object?> env);
-}
-
-interface IArgument<T> : IArgument {
-   new T GetValue(IDictionary<string, object?> env);
-   
-   object? IArgument.GetValue(IDictionary<string, object?> env) =>
-      GetValue(env);
-}
@@ -1,12 +0,0 @@
-namespace Bts.BooleanExpressions.Arguments;
-
-class Variable : IArgument {
-   readonly string name;
-
-   public Variable(string name) =>
-      this.name = name;
-
-   public object? GetValue(IDictionary<string, object?> env) =>
-      env.TryGetValue(name, out var res) ?
-         res : throw new BooleanExpressionException($"Did not find variable named '{name}'");
-}
@@ -1,13 +0,0 @@
-namespace Bts.BooleanExpressions;
-
-class BinaryOperator : IBinaryOperator {
-   readonly Func<IArgument?, IArgument?, IDictionary<string, object?>, bool> op;
-
-   public BinaryOperator(
-      Func<IArgument?, IArgument?, IDictionary<string, object?>, bool> op) =>
-      this.op = op;
-
-   public bool Evaluate(
-      IArgument? arg1, IArgument? arg2, IDictionary<string, object?> bindings) =>
-      op(arg1, arg2, bindings);
-}
@@ -1,19 +0,0 @@
-namespace Bts.BooleanExpressions;
-
-using bts;
-
-class BooleanExpression : IBooleanExpression {
-   readonly Func<IDictionary<string, object?>, bool> evaluate;
-
-   public BooleanExpression(Func<IDictionary<string, object?>, bool> evaluate) =>
-      this.evaluate = evaluate;
-
-   public bool Evaluate(IDictionary<string, object?> env) {
-      try {
-         return evaluate(env);
-      } catch (Exception ex) {
-         Log.assert(false, $"BooleanExpression.Evaluate failed: {ex}");
-         throw;
-      }
-   }
-}
@@ -1,6 +0,0 @@
-namespace Bts.BooleanExpressions;
-
-public class BooleanExpressionException : Exception {
-   public BooleanExpressionException(string format, params object[] args)
-      : base(string.Format(format, args)) { }
-}
@@ -1,176 +0,0 @@
-%namespace Bts.BooleanExpressions
-%partial
-%visibility internal
-%tokentype Token
-%parsertype BooleanExpressionParserImpl
-
-%union {
-   public int Integer;
-   public double Real;
-   public bool Boolean;
-   public string String;
-   public string Identifier;
-   public DateTime DateTime;
-   public ImmutableList<Definition> Definitions;
-   public Definition Definition;
-   public ImmutableList<string> Parameters;
-   public ImmutableList<IArgument> Arguments;
-   public IArgument Argument;
-   public BooleanExpression Expression;
-   public BoundBooleanExpression BoundExpression;
-}
-
-/* Constants */
-%token BOOLEAN_CONSTANT, INTEGER_CONSTANT, STRING_CONSTANT, NULL_CONSTANT, DATE_TIME_CONSTANT, REAL_CONSTANT
-/* Logical Operators */
-%token OR, AND, XOR, NOT
-/* Syntax */
-%token PARENTHESIS_OPEN, PARENTHESIS_CLOSE, COMMA, IDENTIFIER, DEFINE, BEGIN_DEF, END_DEF
-/* Relational */
-%token EQUAL, LESS_EQUAL, GREATER_EQUAL, LESS, GREATER, DIFFERENT, DIFFERENT2, MATCHES
-
-%left OR AND XOR
-%right NOT
-%nonassoc EQUAL
-
-%type <BoundExpression> BoundExpression
-%type <Definitions> Definitions
-%type <Definition> Definition
-%type <Expression> Expression
-%type <Parameters> Parameters
-%type <Arguments> Arguments
-%type <Argument> Argument
-
-%%
-
-BoundExpression : Definitions Expression { $$ = new($2, $1); }
-   | Expression { $$ = new($1, ImmutableList<Definition>.Empty); };
-
-Definitions :
-   Definition { $$ = ImmutableList<Definition>.Empty.Add($1); }
-   | Definitions Definition { $$ = $1.Add($2); };
-
-Definition :
-   DEFINE IDENTIFIER PARENTHESIS_OPEN Parameters PARENTHESIS_CLOSE BEGIN_DEF Expression END_DEF {
-      $$ = new($2.Identifier, $4, $7);
-   };
-
-Expression :
-   Expression OR Expression {
-      var left = $1;
-      var right = $3;
-      $$ = new(env => left.Evaluate(env) || right.Evaluate(env));
-   }
-   | Expression AND Expression {
-      var left = $1;
-      var right = $3;
-      $$ = new(env => left.Evaluate(env) && right.Evaluate(env));
-   }
-   | Expression XOR Expression {
-      var left = $1;
-      var right = $3;
-      $$ = new(env => left.Evaluate(env) != right.Evaluate(env));
-   }
-   | NOT Expression {
-      var exp = $2;
-      $$ = new(env => !exp.Evaluate(env));
-   }
-   | PARENTHESIS_OPEN Expression PARENTHESIS_CLOSE {
-      $$ = $2; 
-   }
-   | Argument GREATER Argument {
-      var left = $1;
-      var right = $3;
-      $$ = new(env => Arguments.ArgumentComparer.Compare(left, right, env) > 0);
-   }
-   | Argument GREATER_EQUAL Argument {
-      var left = $1;
-      var right = $3;
-      $$ = new(env => Arguments.ArgumentComparer.Compare(left, right, env) >= 0);
-   }
-   | Argument EQUAL Argument {
-      var left = $1;
-      var right = $3;
-      $$ = new(env => Arguments.ArgumentComparer.Compare(left, right, env) == 0);
-   }
-   | Argument LESS_EQUAL Argument {
-      var left = $1;
-      var right = $3;
-      $$ = new(env => Arguments.ArgumentComparer.Compare(left, right, env) <= 0);
-   }
-   | Argument LESS Argument {
-      var left = $1;
-      var right = $3;
-      $$ = new(env => Arguments.ArgumentComparer.Compare(left, right, env) < 0);
-   }
-   | Argument DIFFERENT Argument {
-      var left = $1;
-      var right = $3;
-      $$ = new(env => Arguments.ArgumentComparer.Compare(left, right, env) != 0);
-   }
-   | Argument DIFFERENT2 Argument {
-      var left = $1;
-      var right = $3;
-      $$ = new(env => Arguments.ArgumentComparer.Compare(left, right, env) != 0);
-   }
-   | Argument MATCHES Argument {
-      var left = $1;
-      var right = $3;
-      $$ = new(env => Arguments.ArgumentMatcher.Match(left, right, env));
-   }
-   | Argument {
-      var arg = $1;
-      $$ = new(env => (bool)arg.GetValue(env));
-   }
-   ;
-
-Parameters :
-   {
-      $$ = ImmutableList<string>.Empty; 
-   }
-   | IDENTIFIER {
-      $$ = ImmutableList<string>.Empty.Add($1.Identifier); 
-   }
-   | IDENTIFIER COMMA Parameters {
-      $$ = $3.Insert(0, $1.Identifier); 
-   }
-   ;
-
-Arguments :
-   {
-      $$ = ImmutableList<IArgument>.Empty; 
-   }
-   | Argument {
-      $$ = ImmutableList<IArgument>.Empty.Add($1); 
-   }
-   | Arguments COMMA Argument {
-      $$ = $1.Add($3); 
-   }
-   ;
-
-Argument : IDENTIFIER 
-   {
-      $$ = new Arguments.Variable($1.Identifier);
-   }
-   | BOOLEAN_CONSTANT {
-      $$ = Arguments.Constant.Create($1.Boolean); 
-   }
-   | NULL_CONSTANT {
-      $$ = Arguments.Constant.Create(DBNull.Value); 
-   }
-   | REAL_CONSTANT {
-      $$ = Arguments.Constant.Create($1.Real); 
-   }
-   | STRING_CONSTANT {
-      $$ = Arguments.Constant.Create($1.String); 
-   }
-   | INTEGER_CONSTANT {
-      $$ = Arguments.Constant.Create($1.Integer); 
-   }
-   | DATE_TIME_CONSTANT {
-      $$ = Arguments.Constant.Create($1.DateTime); 
-   }
-   | IDENTIFIER PARENTHESIS_OPEN Arguments PARENTHESIS_CLOSE {
-      $$ = new Arguments.Function($1.Identifier, $3); 
-   }
-   ;
@@ -1,6 +0,0 @@
-namespace Bts.BooleanExpressions;
-
-public class BooleanExpressionInterpreterException : System.Exception {
-   public BooleanExpressionInterpreterException(string message)
-      : base(message) { }
-}
@@ -1,16 +0,0 @@
-namespace Bts.BooleanExpressions;
-
-using Bts.ExpressionCore;
-
-public static class BooleanExpressionParser {
-   public static IBooleanExpression Parse(Stream expression) =>
-      new Parser().Parse(expression);
-
-   public static IBooleanExpression Parse(string expression) =>
-      new Parser().Parse(expression);
-
-   class Parser : IParser<IBooleanExpression> {
-      public IBooleanExpression Parse(Stream expression) =>
-         new BooleanExpressionParserImpl().Parse(expression).BoundExpression;
-   }
-}
@@ -1,22 +0,0 @@
-namespace Bts.BooleanExpressions;
-
-using QUT.Gppg;
-
-using System.IO;
-using System.Text;
-
-partial class BooleanExpressionParserImpl {
-   public BooleanExpressionParserImpl(AbstractScanner<ValueType, LexLocation>? scanner = null)
-      : base(scanner) { }
-
-   public ValueType Parse(string s) {
-      using var ms = new MemoryStream(Encoding.Default.GetBytes(s));
-      return Parse(ms);
-   }
-
-   public ValueType Parse(Stream stream) {
-      Scanner = new BooleanExpressionScanner(stream);
-      Parse();
-      return CurrentSemanticValue;
-   }
-}
@@ -1,13 +0,0 @@
-namespace Bts.BooleanExpressions;
-
-using System;
-
-partial class BooleanExpressionScanner {
-   bts.Logger Logger => bts.Log.Gen;
-
-   public override void yyerror(string format, params object[] args) {
-      base.yyerror(format, args);
-      Console.WriteLine(format, args);
-      Console.WriteLine();
-   }
-}
@@ -1,174 +0,0 @@
-%namespace Bts.BooleanExpressions
-%scannertype BooleanExpressionScanner
-%visibility internal
-%tokentype Token
-
-%option stack, minimize, parser, verbose, persistbuffer, noembedbuffers 
-
-/* Literal Constants */
-Letter                   [a-zA-Z]
-BooleanConstant          'true'|'false'
-CSStringConstant         \"([^\"\\]*|\\.)*\"
-DateTimeConstant         ([1-9]|'10'|'11'|'12')\/([1-9]|([1-2][0-9])|'30'|'31')\/[0-9][0-9][0-9]*
-IntegerConstant          -?[0-9]+
-NullConstant             'null'
-RealConstant             -?[0-9]+\.[0-9]+
-StringConstant           \'([^\'\\]*|\\.)*\'
-
-/* Relational Operators */
-Equal          =
-LessEqual       <=
-GreaterEqual    >=
-Less            <
-Greater         >
-Different       !=
-Different2      <>
-Matches         ~=
-
-/* Logical Operators */
-Or              or
-And             and
-Not             not
-Xor             xor
-
-Define define
-BeginDef \{
-EndDef \}
-
-Identifier               {Letter}({Letter}*[0-9]*_*)*
-
-/* Utility Tokens */
-OpenParenthesis          \(
-CloseParenthesis         \)
-Comma                    ,
-Negate                   '!'
-MapsTo                   ':'
-IsOfType                 '/'
-
-%%
-
-{StringConstant} {
-   yylval.String = yytext.Substring(1, yytext.Length - 2).Replace(@"\'", "'");
-   return (int)Token.STRING_CONSTANT;
-} 
-
-{BooleanConstant} {
-   yylval.Boolean = yytext.ToLower() switch {
-      "true" => true,
-      "false" => false,
-      _ => throw new Exception(
-         string.Format("Expected yytext to be 'true' or 'false' (actually '{0}')", yytext))
-   };
-   return (int)Token.BOOLEAN_CONSTANT;
-}
-
-{NullConstant} {
-   yylval.Null = DBNull.Value;
-   return (int)Token.NULL_CONSTANT;
-}
-
-{DateTimeConstant} {
-   yylval.DateTime = DateTime.Parse(yytext);
-   return (int)Token.DATE_TIME_CONSTANT;
-}
-
-{IntegerConstant} {
-   yylval.Integer = int.Parse(yytext);
-   return (int)Token.INTEGER_CONSTANT;
-}
-
-{RealConstant} {
-   yylval.Real = double.Parse(yytext);
-   return (int)Token.REAL_CONSTANT;
-}
-
-{OpenParenthesis} {
-   return (int)Token.PARENTHESIS_OPEN;
-}
-
-{CloseParenthesis} {
-   return (int)Token.PARENTHESIS_CLOSE;
-}
-
-{Comma} {
-   return (int)Token.COMMA;
-}
-
-{Negate} {
-   return (int)Token.NEGATE;
-}
-
-{MapsTo} {
-   return (int)Token.MAPS_TO;
-}
-
-{Equal} {
-   return (int)Token.EQUAL;
-}
-
-{LessEqual} {
-   return (int)Token.LESS_EQUAL;
-}
-
-{GreaterEqual} {
-   return (int)Token.GREATER_EQUAL;
-}
-
-{Less} {
-   return (int)Token.LESS;
-}
-
-{Greater} {
-   return (int)Token.GREATER;
-}
-
-{Different} {
-   return (int)Token.DIFFERENT;
-}
-
-{Different2} {
-   return (int)Token.DIFFERENT2;
-}
-
-{Matches} {
-   return (int)Token.MATCHES;
-}
-
-{Or} {
-   return (int)Token.OR;
-}
-
-{And} {
-   return (int)Token.AND;
-}
-
-{Not} {
-   return (int)Token.NOT;
-}
-
-{Xor} {
-   return (int)Token.XOR;
-}
-
-{IsOfType} {
-   return (int)Token.IS_OF_TYPE;
-}
-
-{Define} {
-   return (int)Token.DEFINE;
-}
-
-{BeginDef} {
-   return (int)Token.BEGIN_DEF;
-}
-
-{EndDef} {
-   return (int)Token.END_DEF;
-}
-
-{Identifier} {
-   yylval.Identifier = yytext;
-   return (int)Token.IDENTIFIER;
-}
-
-%%
@@ -1,24 +0,0 @@
-<Project Sdk="Microsoft.NET.Sdk">
-
-  <PropertyGroup>
-    <TargetFramework>net7.0</TargetFramework>
-    <ImplicitUsings>enable</ImplicitUsings>
-    <Nullable>enable</Nullable>
-  </PropertyGroup>
-
-  <ItemGroup>
-    <PackageReference Include="Google.Protobuf" Version="3.24.3" />
-    <PackageReference Include="YaccLexTools" Version="1.2.0" />
-  </ItemGroup>
-
-  <ItemGroup>
-    <ProjectReference Include="..\ExpressionCore\ExpressionCore.csproj" />
-    <ProjectReference Include="..\..\client\spark_core\spark_core.csproj" />
-  </ItemGroup>
-  
-  <ItemGroup>
-    <Scanner Include="BooleanExpressionTokens.lex" />
-    <Parser Include="BooleanExpressionGrammar.y" />
-  </ItemGroup>
-
-</Project>
@@ -1,32 +0,0 @@
-namespace Bts.BooleanExpressions;
-
-using Bts.BooleanExpressions.Arguments;
-
-class BoundBooleanExpression : IBooleanExpression {
-   readonly IBooleanExpression expression;
-   readonly IDictionary<string, FunctionDefinition> definitions;
-   readonly Dictionary<string, object?> identifiers;
-
-   public BoundBooleanExpression(
-      IBooleanExpression expression, IEnumerable<Definition>? definitions = null) {
-      this.expression = expression;
-      var defs = definitions ?? Enumerable.Empty<Definition>();
-      identifiers = defs.ToDictionary(
-         kv => kv.id, kv => (object?)kv.exp);
-      this.definitions = extractFunctions(defs).ToDictionary(kv => kv.Key, kv => kv.Value);
-   }
-
-   public bool Evaluate(IDictionary<string, object?> env) {
-      foreach (var kv in env) {
-         identifiers[kv.Key] = kv.Value;
-      }
-      env = new EvaluationEnvironment(identifiers, definitions);
-      return expression.Evaluate(env);
-   }
-
-   static IEnumerable<KeyValuePair<string, FunctionDefinition>> extractFunctions(
-      IEnumerable<Definition> definitions) =>
-      definitions.Select(d =>
-         new KeyValuePair<string, FunctionDefinition>(
-            Function.FunctionPrefix + d.id, new(d.id, d.args.ToList(), d.exp)));
-}
@@ -1,18 +0,0 @@
-namespace Bts.BooleanExpressions;
-
-using System.Collections.Immutable;
-
-public class Definition {
-   public Definition(string id, ImmutableList<string> args, IBooleanExpression exp) {
-      this.id = id;
-      this.args = args;
-      this.exp = exp;
-   }
-
-   public string id { get; }
-   public ImmutableList<string> args { get; }
-   public IBooleanExpression exp { get; }
-
-   public override string ToString() =>
-      $"{id}({string.Join(", ", args)} | {exp?.GetType()})";
-}
@@ -1,123 +0,0 @@
-namespace Bts.BooleanExpressions;
-
-using Bts.BooleanExpressions.Arguments;
-
-using Spark.Core.Collections;
-
-using System.Collections;
-
-class EvaluationEnvironment : IDictionary<string, object?> {
-   IDictionary<string, object?> userBindings;
-   IDictionary<string, FunctionDefinition> definitions;
-
-   public EvaluationEnvironment(
-      IDictionary<string, object?> userBindings,
-      IDictionary<string, FunctionDefinition> definitions) {
-      this.userBindings = userBindings;
-      this.definitions = definitions;
-   }
-
-   public int Count =>
-      definitions.Count + userBindings.Count;
-
-   public bool IsReadOnly => true;
-
-   public ICollection<string> Keys =>
-      AggregateCollection.Create(userBindings.Keys, definitions.Keys);
-
-   public ICollection<object?> Values =>
-      AggregateCollection.Create(
-         userBindings.Values, SelectorCollection.Create(definitions.Values, v => (object?)v));
-
-   public object? this[string key] {
-      get {
-         var keystr = key.ToString();
-         if (keystr is null || !definitions.TryGetValue(keystr, out var fd)) {
-            return userBindings.TryGetValue(key, out var ubnd) ? ubnd :
-               throw new KeyNotFoundException(
-                  $"EvaluationEnvironment does not contain key '{key}'");
-         }
-         return new Function.Delegate(Evaluate);
-
-         object? Evaluate(List<object?> args) {
-            if (args.Count != fd.args.Count)
-               throw new BooleanExpressionInterpreterException(
-                  $"Parameter count mismatch for {fd.name}. Expected: {fd.args} Got: {args.Count}");
-            else {
-               var newBindings = fd.args.Zip(args).ToDictionary();
-               return fd.expression.Evaluate(new EvaluationEnvironment(
-                  AggregateDictionary.Create(newBindings, userBindings), definitions));
-            }
-         }
-      }
-      set => throw new NotSupportedException();
-   }
-
-   public bool ContainsKey(string key) {
-      var keystr = key.ToString();
-      return
-         (keystr is not null && definitions.ContainsKey(keystr)) ||
-         userBindings.ContainsKey(key);
-   }
-
-   public IEnumerator<KeyValuePair<string, object?>> GetEnumerator() {
-      foreach (var kv in userBindings) {
-         yield return kv;
-      }
-      foreach (var kv in definitions) {
-         if (!userBindings.ContainsKey(kv.Key)) {
-            yield return new(kv.Key, kv.Value);
-         }
-      }
-   }
-
-   public bool TryGetValue(string key, out object? value) {
-      var keystr = key.ToString();
-      if (keystr is null || !definitions.TryGetValue(keystr, out var fd)) {
-         return userBindings.TryGetValue(key, out value);
-      }
-      value = new Function.Delegate(Evaluate);
-      return true;
-
-      object? Evaluate(List<object?> args) {
-         if (args.Count != fd.args.Count)
-            throw new BooleanExpressionInterpreterException(
-               $"Parameter count mismatch for {fd.name}. Expected: {fd.args} Got: {args.Count}");
-         else {
-            var newBindings = fd.args.Zip(args).ToDictionary();
-            return fd.expression.Evaluate(new EvaluationEnvironment(
-               AggregateDictionary.Create(newBindings, userBindings), definitions));
-         }
-      }
-   }
-
-   public void CopyTo(KeyValuePair<string, object?>[] array, int arrayIndex) {
-      foreach (var kv in userBindings) {
-         array[arrayIndex++] = kv;
-      }
-      foreach (var kv in definitions) {
-         array[arrayIndex++] = new(kv.Key, kv.Value);
-      }
-   }
-
-   void IDictionary<string, object?>.Add(string key, object? value) =>
-      throw new NotSupportedException();
-
-   void ICollection<KeyValuePair<string, object?>>.Add(KeyValuePair<string, object?> item) =>
-      throw new NotSupportedException();
-
-   void ICollection<KeyValuePair<string, object?>>.Clear() =>
-      throw new NotSupportedException();
-
-   bool ICollection<KeyValuePair<string, object?>>.Contains(KeyValuePair<string, object?> item) =>
-      TryGetValue(item.Key, out var v) && Equals(v, item.Value);
-
-   IEnumerator IEnumerable.GetEnumerator() =>
-      GetEnumerator();
-
-   bool IDictionary<string, object?>.Remove(string key) =>
-      throw new NotSupportedException();
-
-   bool ICollection<KeyValuePair<string, object?>>.Remove(KeyValuePair<string, object?> item) =>
-      throw new NotSupportedException();
-}
@@ -1,14 +0,0 @@
-namespace Bts.BooleanExpressions;
-
-class FunctionDefinition {
-   public FunctionDefinition(
-      string name, IList<string> args, IBooleanExpression expression) {
-      this.name = name;
-      this.args = args;
-      this.expression = expression;
-   }
-
-   public string name { get; }
-   public IList<string> args { get; }
-   public IBooleanExpression expression { get; }
-}
@@ -1,720 +0,0 @@
-// ==============================================================
-// <auto-generated>
-// This code automatically produced from an embedded resource.
-// Do not edit this file, or it will become incompatible with 
-// the specification from which it was generated.
-// </auto-generated>
-// ==============================================================
-
-using System;
-using System.IO;
-using System.Text;
-using System.Collections.Generic;
-using System.Diagnostics.CodeAnalysis;
-using System.Runtime.Serialization;
-using System.Globalization;
-
-namespace QUT.GplexBuffers
-{
-// Code copied from GPLEX embedded resource
-    [Serializable]
-    internal class BufferException : Exception
-    {
-        public BufferException() { }
-        public BufferException(string message) : base(message) { }
-        public BufferException(string message, Exception innerException)
-            : base(message, innerException) { }
-        protected BufferException(SerializationInfo info, StreamingContext context)
-            : base(info, context) { }
-    }
-
-    internal abstract class ScanBuff
-    {
-        private string fileNm;
-
-        public const int EndOfFile = -1;
-        public const int UnicodeReplacementChar = 0xFFFD;
-
-        public bool IsFile { get { return (fileNm != null); } }
-        public string FileName { get { return fileNm; } set { fileNm = value; } }
-
-        public abstract int Pos { get; set; }
-        public abstract int Read();
-        public virtual void Mark() { }
-
-        public abstract string GetString(int begin, int limit);
-
-        public static ScanBuff GetBuffer(string source)
-        {
-            return new StringBuffer(source);
-        }
-
-        public static ScanBuff GetBuffer(IList<string> source)
-        {
-            return new LineBuffer(source);
-        }
-
-#if (!NOFILES)
-        public static ScanBuff GetBuffer(Stream source)
-        {
-            return new BuildBuffer(source);
-        }
-
-#if (!BYTEMODE)
-        public static ScanBuff GetBuffer(Stream source, int fallbackCodePage)
-        {
-            return new BuildBuffer(source, fallbackCodePage);
-        }
-#endif // !BYTEMODE
-#endif // !NOFILES
-    }
-
-    #region Buffer classes
-
-    // ==============================================================
-    // =====  Definitions for various ScanBuff derived classes   ====
-    // ==============================================================
-    // ===============         String input          ================
-    // ==============================================================
-
-    /// <summary>
-    /// This class reads characters from a single string as
-    /// required, for example, by Visual Studio language services
-    /// </summary>
-    sealed class StringBuffer : ScanBuff
-    {
-        string str;        // input buffer
-        int bPos;          // current position in buffer
-        int sLen;
-
-        public StringBuffer(string source)
-        {
-            this.str = source;
-            this.sLen = source.Length;
-            this.FileName = null;
-        }
-
-        public override int Read()
-        {
-            if (bPos < sLen) return str[bPos++];
-            else if (bPos == sLen) { bPos++; return '\n'; }   // one strike, see new line
-            else { bPos++; return EndOfFile; }                // two strikes and you're out!
-        }
-
-        public override string GetString(int begin, int limit)
-        {
-            //  "limit" can be greater than sLen with the BABEL
-            //  option set.  Read returns a "virtual" EOL if
-            //  an attempt is made to read past the end of the
-            //  string buffer.  Without the guard any attempt 
-            //  to fetch yytext for a token that includes the 
-            //  EOL will throw an index exception.
-            if (limit > sLen) limit = sLen;
-            if (limit <= begin) return "";
-            else return str.Substring(begin, limit - begin);
-        }
-
-        public override int Pos
-        {
-            get { return bPos; }
-            set { bPos = value; }
-        }
-
-        public override string ToString() { return "StringBuffer"; }
-    }
-
-    // ==============================================================
-    //  The LineBuff class contributed by Nigel Horspool, 
-    //  nigelh@cs.uvic.cs
-    // ==============================================================
-
-    sealed class LineBuffer : ScanBuff
-    {
-        IList<string> line;    // list of source lines from a file
-        int numLines;          // number of strings in line list
-        string curLine;        // current line in that list
-        int cLine;             // index of current line in the list
-        int curLen;            // length of current line
-        int curLineStart;      // position of line start in whole file
-        int curLineEnd;        // position of line end in whole file
-        int maxPos;            // max position ever visited in whole file
-        int cPos;              // ordinal number of code in source
-
-        // Constructed from a list of strings, one per source line.
-        // The lines have had trailing '\n' characters removed.
-        public LineBuffer(IList<string> lineList)
-        {
-            line = lineList;
-            numLines = line.Count;
-            cPos = curLineStart = 0;
-            curLine = (numLines > 0 ? line[0] : "");
-            maxPos = curLineEnd = curLen = curLine.Length;
-            cLine = 1;
-            FileName = null;
-        }
-
-        public override int Read()
-        {
-            if (cPos < curLineEnd)
-                return curLine[cPos++ - curLineStart];
-            if (cPos++ == curLineEnd)
-                return '\n';
-            if (cLine >= numLines)
-                return EndOfFile;
-            curLine = line[cLine];
-            curLen = curLine.Length;
-            curLineStart = curLineEnd + 1;
-            curLineEnd = curLineStart + curLen;
-            if (curLineEnd > maxPos)
-                maxPos = curLineEnd;
-            cLine++;
-            return curLen > 0 ? curLine[0] : '\n';
-        }
-
-        // To speed up searches for the line containing a position
-        private int cachedPosition;
-        private int cachedIxdex;
-        private int cachedLineStart;
-
-        // Given a position pos within the entire source, the results are
-        //   ix     -- the index of the containing line
-        //   lstart -- the position of the first character on that line
-        private void findIndex(int pos, out int ix, out int lstart)
-        {
-            if (pos >= cachedPosition)
-            {
-                ix = cachedIxdex; lstart = cachedLineStart;
-            }
-            else
-            {
-                ix = lstart = 0;
-            }
-            while (ix < numLines)
-            {
-                int len = line[ix].Length + 1;
-                if (pos < lstart + len) break;
-                lstart += len;
-                ix++;
-            }
-            cachedPosition = pos;
-            cachedIxdex = ix;
-            cachedLineStart = lstart;
-        }
-
-        public override string GetString(int begin, int limit)
-        {
-            if (begin >= maxPos || limit <= begin) return "";
-            int endIx, begIx, endLineStart, begLineStart;
-            findIndex(begin, out begIx, out begLineStart);
-            int begCol = begin - begLineStart;
-            findIndex(limit, out endIx, out endLineStart);
-            int endCol = limit - endLineStart;
-            string s = line[begIx];
-            if (begIx == endIx)
-            {
-                // the usual case, substring all on one line
-                return (endCol <= s.Length) ?
-                    s.Substring(begCol, endCol - begCol)
-                    : s.Substring(begCol) + "\n";
-            }
-            // the string spans multiple lines, yuk!
-            StringBuilder sb = new StringBuilder();
-            if (begCol < s.Length)
-                sb.Append(s.Substring(begCol));
-            for (; ; )
-            {
-                sb.Append("\n");
-                s = line[++begIx];
-                if (begIx >= endIx) break;
-                sb.Append(s);
-            }
-            if (endCol <= s.Length)
-            {
-                sb.Append(s.Substring(0, endCol));
-            }
-            else
-            {
-                sb.Append(s);
-                sb.Append("\n");
-            }
-            return sb.ToString();
-        }
-
-        public override int Pos
-        {
-            get { return cPos; }
-            set
-            {
-                cPos = value;
-                findIndex(cPos, out cLine, out curLineStart);
-                // cLine should be the *next* line after curLine.
-                curLine = (cLine < numLines ? line[cLine++] : "");
-                curLineEnd = curLineStart + curLine.Length;
-            }
-        }
-
-        public override string ToString() { return "LineBuffer"; }
-    }
-
-#if (!NOFILES)
-    // ==============================================================
-    // =====     class BuildBuff : for unicode text files    ========
-    // ==============================================================
-
-    class BuildBuffer : ScanBuff
-    {
-        // Double buffer for char stream.
-        class BufferElement
-        {
-            StringBuilder bldr = new StringBuilder();
-            StringBuilder next = new StringBuilder();
-            int minIx;
-            int maxIx;
-            int brkIx;
-            bool appendToNext;
-
-            internal BufferElement() { }
-
-            internal int MaxIndex { get { return maxIx; } }
-            // internal int MinIndex { get { return minIx; } }
-
-            internal char this[int index]
-            {
-                get
-                {
-                    if (index < minIx || index >= maxIx)
-                        throw new BufferException("Index was outside data buffer");
-                    else if (index < brkIx)
-                        return bldr[index - minIx];
-                    else
-                        return next[index - brkIx];
-                }
-            }
-
-            internal void Append(char[] block, int count)
-            {
-                maxIx += count;
-                if (appendToNext)
-                    this.next.Append(block, 0, count);
-                else
-                {
-                    this.bldr.Append(block, 0, count);
-                    brkIx = maxIx;
-                    appendToNext = true;
-                }
-            }
-
-            internal string GetString(int start, int limit)
-            {
-                if (limit <= start)
-                    return "";
-                if (start >= minIx && limit <= maxIx)
-                    if (limit < brkIx) // String entirely in bldr builder
-                        return bldr.ToString(start - minIx, limit - start);
-                    else if (start >= brkIx) // String entirely in next builder
-                        return next.ToString(start - brkIx, limit - start);
-                    else // Must do a string-concatenation
-                        return
-                            bldr.ToString(start - minIx, brkIx - start) +
-                            next.ToString(0, limit - brkIx);
-                else
-                    throw new BufferException("String was outside data buffer");
-            }
-
-            internal void Mark(int limit)
-            {
-                if (limit > brkIx + 16) // Rotate blocks
-                {
-                    StringBuilder temp = bldr;
-                    bldr = next;
-                    next = temp;
-                    next.Length = 0;
-                    minIx = brkIx;
-                    brkIx = maxIx;
-                }
-            }
-        }
-
-        BufferElement data = new BufferElement();
-
-        int bPos;            // Postion index in the StringBuilder
-        BlockReader NextBlk; // Delegate that serves char-arrays;
-
-        private string EncodingName
-        {
-            get
-            {
-                StreamReader rdr = NextBlk.Target as StreamReader;
-                return (rdr == null ? "raw-bytes" : rdr.CurrentEncoding.BodyName);
-            }
-        }
-
-        public BuildBuffer(Stream stream)
-        {
-            FileStream fStrm = (stream as FileStream);
-            if (fStrm != null) FileName = fStrm.Name;
-            NextBlk = BlockReaderFactory.Raw(stream);
-        }
-
-#if (!BYTEMODE)
-        public BuildBuffer(Stream stream, int fallbackCodePage)
-        {
-            FileStream fStrm = (stream as FileStream);
-            if (fStrm != null) FileName = fStrm.Name;
-            NextBlk = BlockReaderFactory.Get(stream, fallbackCodePage);
-        }
-#endif
-
-        /// <summary>
-        /// Marks a conservative lower bound for the buffer,
-        /// allowing space to be reclaimed.  If an application 
-        /// needs to call GetString at arbitrary past locations 
-        /// in the input stream, Mark() is not called.
-        /// </summary>
-        public override void Mark() { data.Mark(bPos - 2); }
-
-        public override int Pos
-        {
-            get { return bPos; }
-            set { bPos = value; }
-        }
-
-
-        /// <summary>
-        /// Read returns the ordinal number of the next char, or 
-        /// EOF (-1) for an end of stream.  Note that the next
-        /// code point may require *two* calls of Read().
-        /// </summary>
-        /// <returns></returns>
-        public override int Read()
-        {
-            //
-            //  Characters at positions 
-            //  [data.offset, data.offset + data.bldr.Length)
-            //  are available in data.bldr.
-            //
-            if (bPos < data.MaxIndex)
-            {
-                // ch0 cannot be EOF
-                return (int)data[bPos++];
-            }
-            else // Read from underlying stream
-            {
-                // Experimental code, blocks of page size
-                char[] chrs = new char[4096];
-                int count = NextBlk(chrs, 0, 4096);
-                if (count == 0)
-                    return EndOfFile;
-                else
-                {
-                    data.Append(chrs, count);
-                    return (int)data[bPos++];
-                }
-            }
-        }
-
-        public override string GetString(int begin, int limit)
-        {
-            return data.GetString(begin, limit);
-        }
-
-        public override string ToString()
-        {
-            return "StringBuilder buffer, encoding: " + this.EncodingName;
-        }
-    }
-
-    // =============== End ScanBuff-derived classes ==================
-
-    internal delegate int BlockReader(char[] block, int index, int number);
-
-    // A delegate factory, serving up a delegate that
-    // reads a block of characters from the underlying
-    // encoded stream, via a StreamReader object.
-    //
-    internal static class BlockReaderFactory
-    {
-        public static BlockReader Raw(Stream stream)
-        {
-            return delegate(char[] block, int index, int number)
-            {
-                byte[] b = new byte[number];
-                int count = stream.Read(b, 0, number);
-                int i = 0;
-                int j = index;
-                for (; i < count; i++, j++)
-                    block[j] = (char)b[i];
-                return count;
-            };
-        }
-
-#if (!BYTEMODE)
-        public static BlockReader Get(Stream stream, int fallbackCodePage)
-        {
-            Encoding encoding;
-            int preamble = Preamble(stream);
-
-            if (preamble != 0)  // There is a valid BOM here!
-                encoding = Encoding.GetEncoding(preamble);
-            else if (fallbackCodePage == -1) // Fallback is "raw" bytes
-                return Raw(stream);
-            else if (fallbackCodePage != -2) // Anything but "guess"
-                encoding = Encoding.GetEncoding(fallbackCodePage);
-            else // This is the "guess" option
-            {
-                int guess = new Guesser(stream).GuessCodePage();
-                stream.Seek(0, SeekOrigin.Begin);
-                if (guess == -1) // ==> this is a 7-bit file
-                    encoding = Encoding.ASCII;
-                else if (guess == 65001)
-                    encoding = Encoding.UTF8;
-                else             // ==> use the machine default
-                    encoding = Encoding.Default;
-            }
-            StreamReader reader = new StreamReader(stream, encoding);
-            return reader.Read;
-        }
-
-        static int Preamble(Stream stream)
-        {
-            int b0 = stream.ReadByte();
-            int b1 = stream.ReadByte();
-
-            if (b0 == 0xfe && b1 == 0xff)
-                return 1201; // UTF16BE
-            if (b0 == 0xff && b1 == 0xfe)
-                return 1200; // UTF16LE
-
-            int b2 = stream.ReadByte();
-            if (b0 == 0xef && b1 == 0xbb && b2 == 0xbf)
-                return 65001; // UTF8
-            //
-            // There is no unicode preamble, so we
-            // return denoter for the machine default.
-            //
-            stream.Seek(0, SeekOrigin.Begin);
-            return 0;
-        }
-#endif // !BYTEMODE
-    }
-#endif // !NOFILES
-    #endregion Buffer classes
-
-    // ==============================================================
-    // ============      class CodePageHandling         =============
-    // ==============================================================
-#if (!NOFILES)
-    public static class CodePageHandling
-    {
-        public static int GetCodePage(string option)
-        {
-            string command = option.ToUpperInvariant();
-            if (command.StartsWith("CodePage:", StringComparison.OrdinalIgnoreCase))
-                command = command.Substring(9);
-            try
-            {
-                if (command.Equals("RAW"))
-                    return -1;
-                else if (command.Equals("GUESS"))
-                    return -2;
-                else if (command.Equals("DEFAULT"))
-                    return 0;
-                else if (char.IsDigit(command[0]))
-                    return int.Parse(command, CultureInfo.InvariantCulture);
-                else
-                {
-                    Encoding enc = Encoding.GetEncoding(command);
-                    return enc.CodePage;
-                }
-            }
-            catch (FormatException)
-            {
-                Console.Error.WriteLine(
-                    "Invalid format \"{0}\", using machine default", option);
-            }
-            catch (ArgumentException)
-            {
-                Console.Error.WriteLine(
-                    "Unknown code page \"{0}\", using machine default", option);
-            }
-            return 0;
-        }
-    }
-#region guesser
-#if (!BYTEMODE)
-    // ==============================================================
-    // ============          Encoding Guesser           =============
-    // ==============================================================
-
-    /// <summary>
-    /// This class provides a simple finite state automaton that
-    /// scans the file looking for (1) valid UTF-8 byte patterns,
-    /// (2) bytes >= 0x80 which are not part of a UTF-8 sequence.
-    /// The method then guesses whether it is UTF-8 or maybe some 
-    /// local machine default encoding.  This works well for the
-    /// various Latin encodings.
-    /// </summary>
-    internal class Guesser
-    {
-        ScanBuff buffer;
-
-        public int GuessCodePage() { return Scan(); }
-
-        const int maxAccept = 10;
-        const int initial = 0;
-        const int eofNum = 0;
-        const int goStart = -1;
-        const int INITIAL = 0;
-        const int EndToken = 0;
-
-        #region user code
-        /* 
-         *  Reads the bytes of a file to determine if it is 
-         *  UTF-8 or a single-byte code page file.
-         */
-        public long utfX;
-        public long uppr;
-        #endregion user code
-
-        int state;
-        int currentStart = startState[0];
-        int code;
-
-        #region ScannerTables
-        static int[] startState = new int[] { 11, 0 };
-
-        #region CharacterMap
-        static sbyte[] map = new sbyte[256] {
-/*     '\0' */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 
-/*   '\x10' */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 
-/*   '\x20' */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 
-/*      '0' */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 
-/*      '@' */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 
-/*      'P' */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 
-/*      '`' */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 
-/*      'p' */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 
-/*   '\x80' */ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 
-/*   '\x90' */ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 
-/*   '\xA0' */ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 
-/*   '\xB0' */ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 
-/*   '\xC0' */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 
-/*   '\xD0' */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 
-/*   '\xE0' */ 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 
-/*   '\xF0' */ 4, 4, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 5, 5, 5, 5 };
-        #endregion
-
-        static sbyte[][] nextState = new sbyte[][] {
-            new sbyte[] {0, 0, 0, 0, 0, 0},
-            new sbyte[] {-1, -1, 10, -1, -1, -1},
-            new sbyte[] {-1, -1, -1, -1, -1, -1},
-            new sbyte[] {-1, -1, 8, -1, -1, -1},
-            new sbyte[] {-1, -1, 5, -1, -1, -1},
-            new sbyte[] {-1, -1, 6, -1, -1, -1},
-            new sbyte[] {-1, -1, 7, -1, -1, -1},
-            null,
-            new sbyte[] {-1, -1, 9, -1, -1, -1},
-            null,
-            null,
-            new sbyte[] {-1, 1, 2, 3, 4, 2}
-        };
-
-
-        [SuppressMessage("Microsoft.Performance", "CA1810:InitializeReferenceTypeStaticFieldsInline")]
-        // Reason for suppression: cannot have self-reference in array initializer.
-        static Guesser()
-        {
-            nextState[7] = nextState[2];
-            nextState[9] = nextState[2];
-            nextState[10] = nextState[2];
-        }
-
-        int NextState()
-        {
-            if (code == ScanBuff.EndOfFile)
-                return eofNum;
-            else
-                return nextState[state][map[code]];
-        }
-        #endregion
-
-        public Guesser(System.IO.Stream file) { SetSource(file); }
-
-        public void SetSource(System.IO.Stream source)
-        {
-            this.buffer = new BuildBuffer(source);
-            code = buffer.Read();
-        }
-
-        int Scan()
-        {
-            for (; ; )
-            {
-                int next;
-                state = currentStart;
-                while ((next = NextState()) == goStart)
-                    code = buffer.Read();
-
-                state = next;
-                code = buffer.Read();
-
-                while ((next = NextState()) > eofNum)
-                {
-                    state = next;
-                    code = buffer.Read();
-                }
-                if (state <= maxAccept)
-                {
-                    #region ActionSwitch
-#pragma warning disable 162
-                    switch (state)
-                    {
-                        case eofNum:
-                            switch (currentStart)
-                            {
-                                case 11:
-                                    if (utfX == 0 && uppr == 0) return -1; /* raw ascii */
-                                    else if (uppr * 10 > utfX) return 0;   /* default code page */
-                                    else return 65001;                     /* UTF-8 encoding */
-                                    break;
-                            }
-                            return EndToken;
-                        case 1: // Recognized '{Upper128}',	Shortest string "\xC0"
-                        case 2: // Recognized '{Upper128}',	Shortest string "\x80"
-                        case 3: // Recognized '{Upper128}',	Shortest string "\xE0"
-                        case 4: // Recognized '{Upper128}',	Shortest string "\xF0"
-                            uppr++;
-                            break;
-                        case 5: // Recognized '{Utf8pfx4}{Utf8cont}',	Shortest string "\xF0\x80"
-                            uppr += 2;
-                            break;
-                        case 6: // Recognized '{Utf8pfx4}{Utf8cont}{2}',	Shortest string "\xF0\x80\x80"
-                            uppr += 3;
-                            break;
-                        case 7: // Recognized '{Utf8pfx4}{Utf8cont}{3}',	Shortest string "\xF0\x80\x80\x80"
-                            utfX += 3;
-                            break;
-                        case 8: // Recognized '{Utf8pfx3}{Utf8cont}',	Shortest string "\xE0\x80"
-                            uppr += 2;
-                            break;
-                        case 9: // Recognized '{Utf8pfx3}{Utf8cont}{2}',	Shortest string "\xE0\x80\x80"
-                            utfX += 2;
-                            break;
-                        case 10: // Recognized '{Utf8pfx2}{Utf8cont}',	Shortest string "\xC0\x80"
-                            utfX++;
-                            break;
-                        default:
-                            break;
-                    }
-#pragma warning restore 162
-                    #endregion
-                }
-            }
-        }
-    } // end class Guesser
-    
-#endif // !BYTEMODE
-#endregion
-#endif // !NOFILES
-
-// End of code copied from embedded resource
-}
@@ -1,5 +0,0 @@
-namespace Bts.BooleanExpressions;
-
-interface IBinaryOperator {
-   bool Evaluate(IArgument? left, IArgument? right, IDictionary<string, object?> env);
-}
@@ -1,5 +0,0 @@
-namespace Bts.BooleanExpressions;
-
-public interface IBooleanExpression {
-   bool Evaluate(IDictionary<string, object?> env);
-}
@@ -1,884 +0,0 @@
-// ==============================================================
-// <auto-generated>
-// This code automatically produced from an embedded resource.
-// Do not edit this file, or it will become incompatible with 
-// the specification from which it was generated.
-// </auto-generated>
-// ==============================================================
-
-// Gardens Point Parser Generator
-// Copyright (c) Wayne Kelly, QUT 2005-2010
-// (see accompanying GPPGcopyright.rtf)
-
-using System;
-using System.Text;
-using System.Globalization;
-using System.Collections.Generic;
-using System.Runtime.Serialization;
-using System.Diagnostics.CodeAnalysis;
-
-namespace QUT.Gppg {
-    /// <summary>
-    /// Abstract class for GPPG shift-reduce parsers.
-    /// Parsers generated by GPPG derive from this base
-    /// class, overriding the abstract Initialize() and
-    /// DoAction() methods.
-    /// </summary>
-    /// <typeparam name="TValue">Semantic value type</typeparam>
-    /// <typeparam name="TSpan">Location type</typeparam>
-#if EXPORT_GPPG
-    public abstract class ShiftReduceParser<TValue, TSpan>
-#else
-    internal abstract class ShiftReduceParser<TValue, TSpan>
-#endif
- where TSpan : IMerge<TSpan>, new() {
-        private AbstractScanner<TValue, TSpan> scanner;
-        /// <summary>
-        /// The abstract scanner for this parser.
-        /// </summary>
-        protected AbstractScanner<TValue, TSpan> Scanner {
-            get { return scanner; }
-            set { scanner = value; }
-        }
-
-        /// <summary>
-        /// Constructor for base class
-        /// </summary>
-        /// <param name="scanner">Scanner instance for this parser</param>
-        protected ShiftReduceParser( AbstractScanner<TValue, TSpan> scanner ) {
-            this.scanner = scanner;
-        }
-
-        // ==============================================================
-        //                    TECHNICAL EXPLANATION.
-        //   Why the next two fields are not exposed via properties.
-        // ==============================================================
-        // These fields are of the generic parameter types, and are
-        // frequently instantiated as struct types in derived classes.
-        // Semantic actions are defined in the derived classes and refer
-        // to instance fields of these structs.  In such cases the code
-        // "get_CurrentSemanticValue().myField = blah;" will fail since
-        // the getter pushes the value of the field, not the reference.
-        // So, in the presence of properties, gppg would need to encode
-        // such field accesses as ... 
-        //  "tmp = get_CurrentSemanticValue(); // Fetch value
-        //   tmp.myField = blah;               // update
-        //   set_CurrentSemanticValue(tmp); "  // Write update back.
-        // There is no issue if TValue is restricted to be a ref type.
-        // The same explanation applies to scanner.yylval.
-        // ==============================================================
-        /// <summary>
-        /// The current value of the "$$" symbolic variable in the parser
-        /// </summary>
-        [SuppressMessage( "Microsoft.Design", "CA1051:DoNotDeclareVisibleInstanceFields" )]
-        protected TValue CurrentSemanticValue;
-
-        /// <summary>
-        /// The current value of the "@$" symbolic variable in the parser
-        /// </summary>
-        [SuppressMessage( "Microsoft.Design", "CA1051:DoNotDeclareVisibleInstanceFields" )]
-        protected TSpan CurrentLocationSpan;
-        protected int NextToken;
-
-        private TSpan LastSpan;
-        private State FsaState;
-        private bool recovering;
-        private int tokensSinceLastError;
-
-        private PushdownPrefixState<State> StateStack = new PushdownPrefixState<State>();
-        private PushdownPrefixState<TValue> valueStack = new PushdownPrefixState<TValue>();
-        private PushdownPrefixState<TSpan> locationStack = new PushdownPrefixState<TSpan>();
-
-        /// <summary>
-        /// The stack of semantic value (YYSTYPE) values.
-        /// </summary>
-        protected PushdownPrefixState<TValue> ValueStack { get { return valueStack; } }
-
-        /// <summary>
-        /// The stack of location value (YYLTYPE) varlues.
-        /// </summary>
-        protected PushdownPrefixState<TSpan> LocationStack { get { return locationStack; } }
-
-        private int errorToken;
-        private int endOfFileToken;
-        private string[] nonTerminals;
-        private State[] states;
-        private Rule[] rules;
-
-        /// <summary>
-        /// Initialization method to allow derived classes
-        /// to insert the rule list into this base class.
-        /// </summary>
-        /// <param name="rules">The array of Rule objects</param>
-        protected void InitRules( Rule[] rules ) { this.rules = rules; }
-
-        /// <summary>
-        /// Initialization method to allow derived classes to
-        /// insert the states table into this base class.
-        /// </summary>
-        /// <param name="states">The pre-initialized states table</param>
-        protected void InitStates( State[] states ) { this.states = states; }
-
-        /// <summary>
-        /// OBSOLETE FOR VERSION 1.4.0
-        /// </summary>
-        /// <param name="size"></param>
-        protected void InitStateTable( int size ) { states = new State[size]; }
-
-        /// <summary>
-        /// Initialization method to allow derived classes
-        /// to insert the special value for the error and EOF tokens.
-        /// </summary>
-        /// <param name="err">The error state ordinal</param>
-        /// <param name="end">The EOF stat ordinal</param>
-        protected void InitSpecialTokens( int err, int end ) {
-            errorToken = err;
-            endOfFileToken = end;
-        }
-
-        /// <summary>
-        /// Initialization method to allow derived classes to
-        /// insert the non-terminal symbol names into this base class.
-        /// </summary>
-        /// <param name="names">Non-terminal symbol names</param>
-        protected void InitNonTerminals( string[] names ) { nonTerminals = names; }
-
-        #region YYAbort, YYAccept etcetera.
-        [Serializable]
-        [SuppressMessage( "Microsoft.Design", "CA1064:ExceptionsShouldBePublic" )]
-        // Reason for FxCop message suppression -
-        // This exception cannot escape from the local context
-        private class AcceptException : Exception {
-            internal AcceptException() { }
-            protected AcceptException( SerializationInfo i, StreamingContext c ) : base( i, c ) { }
-        }
-        [Serializable]
-        [SuppressMessage( "Microsoft.Design", "CA1064:ExceptionsShouldBePublic" )]
-        // Reason for FxCop message suppression -
-        // This exception cannot escape from the local context
-        private class AbortException : Exception {
-            internal AbortException() { }
-            protected AbortException( SerializationInfo i, StreamingContext c ) : base( i, c ) { }
-        }
-        [Serializable]
-        [SuppressMessage( "Microsoft.Design", "CA1064:ExceptionsShouldBePublic" )]
-        // Reason for FxCop message suppression -
-        // This exception cannot escape from the local context
-        private class ErrorException : Exception {
-            internal ErrorException() { }
-            protected ErrorException( SerializationInfo i, StreamingContext c ) : base( i, c ) { }
-        }
-
-        // The following methods are only called from within
-        // a semantic action. The thrown exceptions can never
-        // propagate outside the ShiftReduceParser class in 
-        // which they are nested.
-
-        /// <summary>
-        /// Force parser to terminate, returning "true"
-        /// </summary>
-        protected static void YYAccept() { throw new AcceptException(); }
-
-        /// <summary>
-        /// Force parser to terminate, returning "false"
-        /// </summary>
-        protected static void YYAbort() { throw new AbortException(); }
-
-        /// <summary>
-        /// Force parser to terminate, returning
-        /// "false" if error recovery fails.
-        /// </summary>
-        protected static void YYError() { throw new ErrorException(); }
-
-        /// <summary>
-        /// Check if parser in error recovery state.
-        /// </summary>
-        protected bool YYRecovering { get { return recovering; } }
-        #endregion
-
-        /// <summary>
-        /// Abstract base method. ShiftReduceParser calls this
-        /// to initialize the base class data structures.  Concrete
-        /// parser classes must override this method.
-        /// </summary>
-        protected abstract void Initialize();
-
-        /// <summary>
-        /// Main entry point of the Shift-Reduce Parser.
-        /// </summary>
-        /// <returns>True if parse succeeds, else false for
-        /// unrecoverable errors</returns>
-        public bool Parse() {
-            Initialize();	// allow derived classes to instantiate rules, states and nonTerminals
-
-            NextToken = 0;
-            FsaState = states[0];
-
-            StateStack.Push( FsaState );
-            valueStack.Push( CurrentSemanticValue );
-            LocationStack.Push( CurrentLocationSpan );
-
-            while (true) {
-#if TRACE_ACTIONS
-                Console.Error.WriteLine("Entering state {0} ", FsaState.number);
-                DisplayStack();
-#endif
-                int action = FsaState.defaultAction;
-
-                if (FsaState.ParserTable != null) {
-                    if (NextToken == 0) {
-                        // We save the last token span, so that the location span
-                        // of production right hand sides that begin or end with a
-                        // nullable production will be correct.
-                        LastSpan = scanner.yylloc;
-                        NextToken = scanner.yylex();
-#if TRACE_ACTIONS
-                       Console.Error.WriteLine( "Reading: Next token is {0}", TerminalToString( NextToken ) );
-#endif
-                    }
-#if TRACE_ACTIONS
-                    else 
-                        Console.Error.WriteLine( "Next token is still {0}", TerminalToString( NextToken ) );
-#endif
-                    if (FsaState.ParserTable.ContainsKey( NextToken ))
-                        action = FsaState.ParserTable[NextToken];
-                }
-
-                if (action > 0)         // shift
-                {
-                    Shift( action );
-                }
-                else if (action < 0)   // reduce
-                {
-                    try {
-                        Reduce( -action );
-                        if (action == -1)	// accept
-                            return true;
-                    }
-                    catch (AbortException) {
-                            return false;
-                    }
-                    catch (AcceptException) {
-                        return true;
-                    }
-                    catch (ErrorException) {
-                        if (!ErrorRecovery())
-                            return false;
-                        else
-                            throw;  // Rethrow x, preserving information.
-                    }
-                }
-                else if (action == 0 && !ErrorRecovery()) // error
-                    return false;
-            }
-        }
-
-        private void Shift( int stateIndex ) {
-#if TRACE_ACTIONS
-				Console.Error.Write("Shifting token {0}, ", TerminalToString(NextToken));
-#endif
-            FsaState = states[stateIndex];
-
-            valueStack.Push( scanner.yylval );
-            StateStack.Push( FsaState );
-            LocationStack.Push( scanner.yylloc );
-
-            if (recovering) {
-                if (NextToken != errorToken)
-                    tokensSinceLastError++;
-
-                if (tokensSinceLastError > 5)
-                    recovering = false;
-            }
-
-            if (NextToken != endOfFileToken)
-                NextToken = 0;
-        }
-
-        private void Reduce( int ruleNumber ) {
-#if TRACE_ACTIONS
-				DisplayRule(ruleNumber);
-#endif
-            Rule rule = rules[ruleNumber];
-            int rhLen = rule.RightHandSide.Length;
-            //
-            //  Default actions for unit productions.
-            //
-            if (rhLen == 1) {
-                CurrentSemanticValue = valueStack.TopElement();   // Default action: $$ = $1;
-                CurrentLocationSpan = LocationStack.TopElement(); // Default action "@$ = @1;
-            }
-            else if (rhLen == 0) {
-                // Create a new blank value.
-                // Explicit semantic action may mutate this value
-                CurrentSemanticValue = default( TValue );
-                // The location span for an empty production will start with the
-                // beginning of the next lexeme, and end with the finish of the
-                // previous lexeme.  This gives the correct behaviour when this
-                // nonsense value is used in later Merge operations.
-                CurrentLocationSpan = (scanner.yylloc != null && LastSpan != null ?
-                    scanner.yylloc.Merge( LastSpan ) :
-                    default( TSpan ));
-            }
-            else {
-                // Default action: $$ = $1;
-                CurrentSemanticValue = valueStack[LocationStack.Depth - rhLen];
-                //  Default action "@$ = @1.Merge(@N)" for location info.
-                TSpan at1 = LocationStack[LocationStack.Depth - rhLen];
-                TSpan atN = LocationStack[LocationStack.Depth - 1];
-                CurrentLocationSpan =
-                    ((at1 != null && atN != null) ? at1.Merge( atN ) : default( TSpan ));
-            }
-
-            DoAction( ruleNumber );
-
-            for (int i = 0; i < rule.RightHandSide.Length; i++) {
-                StateStack.Pop();
-                valueStack.Pop();
-                LocationStack.Pop();
-            }
-            FsaState = StateStack.TopElement();
-
-            if (FsaState.Goto.ContainsKey( rule.LeftHandSide ))
-                FsaState = states[FsaState.Goto[rule.LeftHandSide]];
-
-            StateStack.Push( FsaState );
-            valueStack.Push( CurrentSemanticValue );
-            LocationStack.Push( CurrentLocationSpan );
-        }
-
-        /// <summary>
-        /// Execute the selected action from array.
-        /// Must be overriden in derived classes.
-        /// </summary>
-        /// <param name="actionNumber">Index of the action to perform</param>
-        protected abstract void DoAction( int actionNumber );
-
-        private bool ErrorRecovery() {
-            bool discard;
-
-            if (!recovering) // if not recovering from previous error
-                ReportError();
-
-            if (!FindErrorRecoveryState())
-                return false;
-            //
-            //  The interim fix for the "looping in error recovery"
-            //  artifact involved moving the setting of the recovering 
-            //  bool until after invalid tokens have been discarded.
-            //
-            ShiftErrorToken();
-            discard = DiscardInvalidTokens();
-            recovering = true;
-            tokensSinceLastError = 0;
-            return discard;
-        }
-
-        private void ReportError() {
-            StringBuilder errorMsg = new StringBuilder();
-            errorMsg.AppendFormat( "Syntax error, unexpected {0}", TerminalToString( NextToken ) );
-
-            if (FsaState.ParserTable.Count < 7) {
-                bool first = true;
-                foreach (int terminal in FsaState.ParserTable.Keys) {
-                    if (first)
-                        errorMsg.Append( ", expecting " );
-                    else
-                        errorMsg.Append( ", or " );
-
-                    errorMsg.Append( TerminalToString( terminal ) );
-                    first = false;
-                }
-            }
-            scanner.yyerror( errorMsg.ToString() );
-        }
-
-        private void ShiftErrorToken() {
-            int old_next = NextToken;
-            NextToken = errorToken;
-
-            Shift( FsaState.ParserTable[NextToken] );
-
-#if TRACE_ACTIONS
-				Console.Error.WriteLine("Entering state {0} ", FsaState.number);
-#endif
-            NextToken = old_next;
-        }
-
-        private bool FindErrorRecoveryState() {
-            while (true)    // pop states until one found that accepts error token
-            {
-                if (FsaState.ParserTable != null &&
-                    FsaState.ParserTable.ContainsKey( errorToken ) &&
-                    FsaState.ParserTable[errorToken] > 0) // shift
-                    return true;
-
-#if TRACE_ACTIONS
-					Console.Error.WriteLine("Error: popping state {0}", StateStack.TopElement().number);
-#endif
-                StateStack.Pop();
-                valueStack.Pop();
-                LocationStack.Pop();
-
-#if TRACE_ACTIONS
-			    DisplayStack();
-#endif
-                if (StateStack.IsEmpty()) {
-#if TRACE_ACTIONS
-                        Console.Error.WriteLine("Aborting: didn't find a state that accepts error token");
-#endif
-                    return false;
-                }
-                else
-                    FsaState = StateStack.TopElement();
-            }
-        }
-
-        private bool DiscardInvalidTokens() {
-
-            int action = FsaState.defaultAction;
-
-            if (FsaState.ParserTable != null) {
-                // Discard tokens until find one that works ...
-                while (true) {
-                    if (NextToken == 0) {
-#if TRACE_ACTIONS
-                            Console.Error.Write("Reading a token: ");
-#endif
-                        NextToken = scanner.yylex();
-                    }
-#if TRACE_ACTIONS
-                        Console.Error.WriteLine("Next token is {0}", TerminalToString(NextToken));
-#endif
-                    if (NextToken == endOfFileToken)
-                        return false;
-
-                    if (FsaState.ParserTable.ContainsKey( NextToken ))
-                        action = FsaState.ParserTable[NextToken];
-
-                    if (action != 0)
-                        return true;
-                    else {
-#if TRACE_ACTIONS
-                            Console.Error.WriteLine("Error: Discarding {0}", TerminalToString(NextToken));
-#endif
-                        NextToken = 0;
-                    }
-                }
-            }
-            else if (recovering && tokensSinceLastError == 0) {
-                // 
-                //  Boolean recovering is not set until after the first
-                //  error token has been shifted.  Thus if we get back 
-                //  here with recovering set and no tokens read we are
-                //  looping on the same error recovery action.  This 
-                //  happens if current_state.ParserTable is null because
-                //  the state has an LR(0) reduction, but not all
-                //  lookahead tokens are valid.  This only occurs for
-                //  error productions that *end* on "error".
-                //
-                //  This action discards tokens one at a time until
-                //  the looping stops.  Another attack would be to always
-                //  use the LALR(1) table if a production ends on "error"
-                //
-#if TRACE_ACTIONS
-                    Console.Error.WriteLine("Error: panic discard of {0}", TerminalToString(NextToken));
-#endif
-                if (NextToken == endOfFileToken)
-                    return false;
-                NextToken = 0;
-                return true;
-            }
-            else
-                return true;
-        }
-
-        /// <summary>
-        /// Traditional YACC method.  Discards the next input token.
-        /// </summary>
-        [SuppressMessage( "Microsoft.Naming", "CA1709:IdentifiersShouldBeCasedCorrectly", MessageId = "yyclearin" )]
-        [SuppressMessage( "Microsoft.Naming", "CA1704:IdentifiersShouldBeSpelledCorrectly", MessageId = "yyclearin" )]
-        // Reason for FxCop message suppression -
-        // This is a traditional name for YACC-like functionality
-        protected void yyclearin() { NextToken = 0; }
-
-        /// <summary>
-        /// Tradional YACC method. Clear the "recovering" flag.
-        /// </summary>
-        [SuppressMessage( "Microsoft.Naming", "CA1709:IdentifiersShouldBeCasedCorrectly", MessageId = "yyerrok" )]
-        [SuppressMessage( "Microsoft.Naming", "CA1704:IdentifiersShouldBeSpelledCorrectly", MessageId = "yyerrok" )]
-        // Reason for FxCop message suppression -
-        // This is a traditional name for YACC-like functionality
-        protected void yyerrok() { recovering = false; }
-
-        /// <summary>
-        /// OBSOLETE FOR VERSION 1.4.0
-        /// Method used by derived types to insert new
-        /// state instances in the "states" array.
-        /// </summary>
-        /// <param name="stateNumber">index of the state</param>
-        /// <param name="state">data for the state</param>
-        protected void AddState( int stateNumber, State state ) {
-            states[stateNumber] = state;
-            state.number = stateNumber;
-        }
-
-        private void DisplayStack() {
-            Console.Error.Write( "State stack is now:" );
-            for (int i = 0; i < StateStack.Depth; i++)
-                Console.Error.Write( " {0}", StateStack[i].number );
-            Console.Error.WriteLine();
-        }
-
-        private void DisplayRule( int ruleNumber ) {
-            Console.Error.Write( "Reducing stack by rule {0}, ", ruleNumber );
-            DisplayProduction( rules[ruleNumber] );
-        }
-
-        private void DisplayProduction( Rule rule ) {
-            if (rule.RightHandSide.Length == 0)
-                Console.Error.Write( "/* empty */ " );
-            else
-                foreach (int symbol in rule.RightHandSide)
-                    Console.Error.Write( "{0} ", SymbolToString( symbol ) );
-
-            Console.Error.WriteLine( "-> {0}", SymbolToString( rule.LeftHandSide ) );
-        }
-
-        /// <summary>
-        /// Abstract state class naming terminal symbols.
-        /// This is overridden by derived classes with the
-        /// name (or alias) to be used in error messages.
-        /// </summary>
-        /// <param name="terminal">The terminal ordinal</param>
-        /// <returns></returns>
-        protected abstract string TerminalToString( int terminal );
-
-        private string SymbolToString( int symbol ) {
-            if (symbol < 0)
-                return nonTerminals[-symbol - 1];
-            else
-                return TerminalToString( symbol );
-        }
-
-        /// <summary>
-        /// Return text representation of argument character
-        /// </summary>
-        /// <param name="input">The character to convert</param>
-        /// <returns>String representation of the character</returns>
-        protected static string CharToString( char input ) {
-            switch (input) {
-                case '\a': return @"'\a'";
-                case '\b': return @"'\b'";
-                case '\f': return @"'\f'";
-                case '\n': return @"'\n'";
-                case '\r': return @"'\r'";
-                case '\t': return @"'\t'";
-                case '\v': return @"'\v'";
-                case '\0': return @"'\0'";
-                default: return string.Format( CultureInfo.InvariantCulture, "'{0}'", input );
-            }
-        }
-    }
-
-    /// <summary>
-    /// Classes implementing this interface must supply a
-    /// method that merges two location objects to return
-    /// a new object of the same type.
-    /// GPPG-generated parsers have the default location
-    /// action equivalent to "@$ = @1.Merge(@N);" where N
-    /// is the right-hand-side length of the production.
-    /// </summary>
-    /// <typeparam name="TSpan">The Location type</typeparam>
-#if EXPORT_GPPG
-    public interface IMerge<TSpan>
-#else
-    internal interface IMerge<TSpan>
-#endif
- {
-        /// <summary>
-        /// Interface method that creates a location object from
-        /// the current and last object.  Typically used to create
-        /// a location object extending from the start of the @1
-        /// object to the end of the @N object.
-        /// </summary>
-        /// <param name="last">The lexically last object to merge</param>
-        /// <returns>The merged location object</returns>
-        TSpan Merge( TSpan last );
-    }
-
-    /// <summary>
-    /// This is the default class that carries location
-    /// information from the scanner to the parser.
-    /// If you don't declare "%YYLTYPE Foo" the parser
-    /// will expect to deal with this type.
-    /// </summary>
-#if EXPORT_GPPG
-    public class LexLocation : IMerge<LexLocation>
-#else
-    [SuppressMessage( "Microsoft.Performance", "CA1812:AvoidUninstantiatedInternalClasses" )]
-    internal class LexLocation : IMerge<LexLocation>
-#endif
- {
-        private int startLine;   // start line
-        private int startColumn; // start column
-        private int endLine;     // end line
-        private int endColumn;   // end column
-
-        /// <summary>
-        /// The line at which the text span starts.
-        /// </summary>
-        public int StartLine { get { return startLine; } }
-
-        /// <summary>
-        /// The column at which the text span starts.
-        /// </summary>
-        public int StartColumn { get { return startColumn; } }
-
-        /// <summary>
-        /// The line on which the text span ends.
-        /// </summary>
-        public int EndLine { get { return endLine; } }
-
-        /// <summary>
-        /// The column of the first character
-        /// beyond the end of the text span.
-        /// </summary>
-        public int EndColumn { get { return endColumn; } }
-
-        /// <summary>
-        /// Default no-arg constructor.
-        /// </summary>
-        public LexLocation() { }
-
-        /// <summary>
-        /// Constructor for text-span with given start and end.
-        /// </summary>
-        /// <param name="sl">start line</param>
-        /// <param name="sc">start column</param>
-        /// <param name="el">end line </param>
-        /// <param name="ec">end column</param>
-        public LexLocation( int sl, int sc, int el, int ec ) { startLine = sl; startColumn = sc; endLine = el; endColumn = ec; }
-
-        /// <summary>
-        /// Create a text location which spans from the 
-        /// start of "this" to the end of the argument "last"
-        /// </summary>
-        /// <param name="last">The last location in the result span</param>
-        /// <returns>The merged span</returns>
-        public LexLocation Merge( LexLocation last ) { return new LexLocation( this.startLine, this.startColumn, last.endLine, last.endColumn ); }
-    }
-
-    /// <summary>
-    /// Abstract scanner class that GPPG expects its scanners to 
-    /// extend.
-    /// </summary>
-    /// <typeparam name="TValue">Semantic value type YYSTYPE</typeparam>
-    /// <typeparam name="TSpan">Source location type YYLTYPE</typeparam>
-#if EXPORT_GPPG
-    public abstract class AbstractScanner<TValue, TSpan>
-#else
-    internal abstract class AbstractScanner<TValue, TSpan>
-#endif
- where TSpan : IMerge<TSpan> {
-        /// <summary>
-        /// Lexical value optionally set by the scanner. The value
-        /// is of the %YYSTYPE type declared in the parser spec.
-        /// </summary>
-        [SuppressMessage( "Microsoft.Design", "CA1051:DoNotDeclareVisibleInstanceFields" )]
-        [SuppressMessage( "Microsoft.Naming", "CA1709:IdentifiersShouldBeCasedCorrectly", MessageId = "yylval" )]
-        [SuppressMessage( "Microsoft.Naming", "CA1704:IdentifiersShouldBeSpelledCorrectly", MessageId = "yylval" )]
-        // Reason for FxCop message suppression -
-        // This is a traditional name for YACC-like functionality
-        // A field must be declared for this value of parametric type,
-        // since it may be instantiated by a value struct.  If it were 
-        // implemented as a property, machine generated code in derived
-        // types would not be able to select on the returned value.
-#pragma warning disable 649
-        public TValue yylval;                     // Lexical value: set by scanner
-#pragma warning restore 649
-
-        /// <summary>
-        /// Current scanner location property. The value is of the
-        /// type declared by %YYLTYPE in the parser specification.
-        /// </summary>
-        [SuppressMessage( "Microsoft.Naming", "CA1709:IdentifiersShouldBeCasedCorrectly", MessageId = "yylloc" )]
-        [SuppressMessage( "Microsoft.Naming", "CA1704:IdentifiersShouldBeSpelledCorrectly", MessageId = "yylloc" )]
-        // Reason for FxCop message suppression -
-        // This is a traditional name for YACC-like functionality
-        public virtual TSpan yylloc {
-            get { return default( TSpan ); }       // Empty implementation allowing
-            set { /* skip */ }                   // yylloc to be ignored entirely.
-        }
-
-        /// <summary>
-        /// Main call point for LEX-like scanners.  Returns an int
-        /// corresponding to the token recognized by the scanner.
-        /// </summary>
-        /// <returns>An int corresponding to the token</returns>
-        [SuppressMessage( "Microsoft.Naming", "CA1709:IdentifiersShouldBeCasedCorrectly", MessageId = "yylex" )]
-        [SuppressMessage( "Microsoft.Naming", "CA1704:IdentifiersShouldBeSpelledCorrectly", MessageId = "yylex" )]
-        // Reason for FxCop message suppression -
-        // This is a traditional name for YACC-like functionality
-        public abstract int yylex();
-
-        /// <summary>
-        /// Traditional error reporting provided by LEX-like scanners
-        /// to their YACC-like clients.
-        /// </summary>
-        /// <param name="format">Message format string</param>
-        /// <param name="args">Optional array of args</param>
-        [SuppressMessage( "Microsoft.Naming", "CA1709:IdentifiersShouldBeCasedCorrectly", MessageId = "yyerror" )]
-        [SuppressMessage( "Microsoft.Naming", "CA1704:IdentifiersShouldBeSpelledCorrectly", MessageId = "yyerror" )]
-        // Reason for FxCop message suppression -
-        // This is a traditional name for YACC-like functionality
-        public virtual void yyerror( string format, params object[] args ) { }
-    }
-
-    /// <summary>
-    /// Encapsulated state for the parser.
-    /// Opaque to users, visible to the tool-generated code.
-    /// </summary>
-#if EXPORT_GPPG
-    public class State
-    {
-        /// <summary>
-        /// The number of states in the automaton.
-        /// </summary>
-        public int number;
-#else
-    internal class State {
-        /// <summary>
-        /// The index of this state in the states array.
-        /// </summary>
-        internal int number;
-#endif
-        internal Dictionary<int, int> ParserTable;   // Terminal -> ParseAction
-        internal Dictionary<int, int> Goto;          // NonTerminal -> State;
-        internal int defaultAction; // = 0;		     // ParseAction
-
-        /// <summary>
-        /// State transition data for this state. Pairs of elements of the 
-        /// goto array associate symbol ordinals with next state indices.
-        /// The actions array is passed to another constructor. 
-        /// </summary>
-        /// <param name="actions">The action list</param>c
-        /// <param name="goToList">Next state data</param>
-        public State( int[] actions, int[] goToList )
-            : this( actions ) {
-            Goto = new Dictionary<int, int>();
-            for (int i = 0; i < goToList.Length; i += 2)
-                Goto.Add( goToList[i], goToList[i + 1] );
-        }
-
-        /// <summary>
-        /// Action data for this state. Pairs of elements of the 
-        /// action array associate action ordinals with each of
-        /// those symbols that have actions in the current state.
-        /// </summary>
-        /// <param name="actions">The action array</param>
-        public State( int[] actions ) {
-            ParserTable = new Dictionary<int, int>();
-            for (int i = 0; i < actions.Length; i += 2)
-                ParserTable.Add( actions[i], actions[i + 1] );
-        }
-
-        /// <summary>
-        /// Set the default action for this state.
-        /// </summary>
-        /// <param name="defaultAction">Ordinal of the default action</param>
-        public State( int defaultAction ) {
-            this.defaultAction = defaultAction;
-        }
-
-        /// <summary>
-        /// Set the default action and the state transition table.
-        /// </summary>
-        /// <param name="defaultAction">The default action</param>
-        /// <param name="goToList">Transitions from this state</param>
-        public State( int defaultAction, int[] goToList )
-            : this( defaultAction ) {
-            Goto = new Dictionary<int, int>();
-            for (int i = 0; i < goToList.Length; i += 2)
-                Goto.Add( goToList[i], goToList[i + 1] );
-        }
-    }
-
-    /// <summary>
-    /// Rule representation at runtime.
-    /// </summary>
-#if EXPORT_GPPG
-    public class Rule
-#else
-    internal class Rule
-#endif
- {
-        internal int LeftHandSide; // symbol
-        internal int[] RightHandSide; // symbols
-
-        /// <summary>
-        /// Rule constructor.  This holds the ordinal of
-        /// the left hand side symbol, and the list of
-        /// right hand side symbols, in lexical order.
-        /// </summary>
-        /// <param name="left">The LHS non-terminal</param>
-        /// <param name="right">The RHS symbols, in lexical order</param>
-        public Rule( int left, int[] right ) {
-            this.LeftHandSide = left;
-            this.RightHandSide = right;
-        }
-    }
-
-    /// <summary>
-    /// Stack utility for the shift-reduce parser.
-    /// GPPG parsers have three instances:
-    /// (1) The parser state stack, T = QUT.Gppg.State,
-    /// (2) The semantic value stack, T = TValue,
-    /// (3) The location stack, T = TSpan.
-    /// </summary>
-    /// <typeparam name="T"></typeparam>
-#if EXPORT_GPPG
-    public class PushdownPrefixState<T>
-#else
-    internal class PushdownPrefixState<T>
-#endif
- {
-        //  Note that we cannot use the BCL Stack<T> class
-        //  here as derived types need to index into stacks.
-        //
-        private T[] array = new T[8];
-        private int tos = 0;
-
-        /// <summary>
-        /// Indexer for values of the stack below the top.
-        /// </summary>
-        /// <param name="index">index of the element, starting from the bottom</param>
-        /// <returns>the selected element</returns>
-        public T this[int index] { get { return array[index]; } }
-
-        /// <summary>
-        /// The current depth of the stack.
-        /// </summary>
-        public int Depth { get { return tos; } }
-
-        internal void Push( T value ) {
-            if (tos >= array.Length) {
-                T[] newarray = new T[array.Length * 2];
-                System.Array.Copy( array, newarray, tos );
-                array = newarray;
-            }
-            array[tos++] = value;
-        }
-
-        internal T Pop() {
-            T rslt = array[--tos];
-            array[tos] = default( T );
-            return rslt;
-        }
-
-        internal T TopElement() { return array[tos - 1]; }
-
-        internal bool IsEmpty() { return tos == 0; }
-    }
-}
-
@@ -1,4 +0,0 @@
-global using System;
-global using System.Linq;
-global using System.Collections.Generic;
-global using System.Collections.Immutable;
@@ -1,26 +0,0 @@
-namespace Bts.ColumnMapExpressions;
-
-using Bts.ExpressionCore;
-
-using System.Collections.Immutable;
-
-public class ColumnMapExpression {
-   public ColumnMapExpression(ImmutableDictionary<string, string> columns, bool isInclusive) {
-      Columns = columns;
-      IsInclusive = isInclusive;
-   }
-
-   public ImmutableDictionary<string, string> Columns { get; }
-   public bool IsInclusive { get; }
-
-   public static ColumnMapExpression? Parse(string expression) =>
-      new Parser().Parse(expression);
-
-   public static ColumnMapExpression? Parse(Stream expression) =>
-      new Parser().Parse(expression);
-
-   class Parser : IParser<ColumnMapExpression?> {
-      public ColumnMapExpression? Parse(Stream expression) =>
-         new ColumnMapExpressionParser().Parse(expression)?.Expression;
-   }
-}
@@ -1,40 +0,0 @@
-%namespace Bts.ColumnMapExpressions
-%partial
-%visibility internal
-%tokentype ColumnMapExpressionToken
-%parsertype ColumnMapExpressionParser
-
-%union {
-   public string Identifier;
-   public KeyValuePair<string, string> MappedColumn;
-   public System.Collections.Immutable.ImmutableDictionary<string, string> MappedColumns;
-   public ColumnMapExpression Expression;
-}
-
-%token IDENTIFIER, MAP, NEGATE 
-
-%type <MappedColumns> MappedColumns
-%type <Expression> Expression
-%type <MappedColumn> MappedColumn
-
-%%
-
-Expression :
-   NEGATE MappedColumns { $$ = new($2, false); }
-   | NEGATE { $$ = new(System.Collections.Immutable.ImmutableDictionary<string, string>.Empty, false); }
-   | MappedColumns { $$ = new($1, true); }
-   ;
-
-MappedColumn :
-   IDENTIFIER {
-      $$ = new($1.Identifier, $1.Identifier);
-   }
-   | IDENTIFIER MAP IDENTIFIER {
-      $$ = new($1.Identifier, $3.Identifier);
-   }
-   ;
-
-MappedColumns :
-   MappedColumn { $$ = System.Collections.Immutable.ImmutableDictionary<string, string>.Empty.Add($1.Key, $1.Value); }
-   | MappedColumn MappedColumns { $$ = $2.Add($1.Key, $1.Value); }
-   ;
@@ -1,18 +0,0 @@
-namespace Bts.ColumnMapExpressions;
-
-using System.Text;
-
-partial class ColumnMapExpressionParser {
-   public ColumnMapExpressionParser() : base(null) { }
-
-   public ValueType? Parse(string s) {
-      using var ms = new MemoryStream(Encoding.Default.GetBytes(s));
-      return Parse(ms);
-   }
-
-   public ValueType? Parse(Stream stream) {
-      Scanner = new ColumnMapExpressionScanner(stream);
-      Parse();
-      return CurrentSemanticValue;
-   }
-}
@@ -1,30 +0,0 @@
-%namespace Bts.ColumnMapExpressions
-%scannertype ColumnMapExpressionScanner
-%visibility internal
-%tokentype ColumnMapExpressionToken
-
-%option stack, minimize, parser, verbose, persistbuffer, noembedbuffers 
-
-/* Literal Constants */
-Letter                   [a-zA-Z]
-
-Identifier               {Letter}({Letter}*[0-9]*_*)*
-Map                      :
-Negate                   !
-
-%%
-
-{Identifier} {
-   yylval.Identifier = yytext;
-   return (int)ColumnMapExpressionToken.IDENTIFIER;
-}
-
-{Map} {
-   return (int)ColumnMapExpressionToken.MAP;
-}
-
-{Negate} {
-   return (int)ColumnMapExpressionToken.NEGATE;
-}
-
-%%
@@ -1,25 +0,0 @@
-<Project Sdk="Microsoft.NET.Sdk">
-
-  <PropertyGroup>
-    <TargetFramework>net7.0</TargetFramework>
-    <ImplicitUsings>enable</ImplicitUsings>
-    <Nullable>enable</Nullable>
-  </PropertyGroup>
-
-  <ItemGroup>
-    <PackageReference Include="Google.Protobuf" Version="3.24.3" />
-    <PackageReference Include="YaccLexTools" Version="1.2.0" />
-  </ItemGroup>
-
-  <ItemGroup>
-    <ProjectReference Include="..\DataStreamCore\DataStreamCore.csproj" />
-    <ProjectReference Include="..\ExpressionCore\ExpressionCore.csproj" />
-    <ProjectReference Include="..\..\client\spark_core\spark_core.csproj" />
-  </ItemGroup>
-
-  <ItemGroup Label="ColumnMapExpression">
-    <Scanner Include="ColumnMapExpressionTokens.lex" />
-    <Parser Include="ColumnMapExpressionGrammar.y" />
-  </ItemGroup>
-
-</Project>
@@ -1,720 +0,0 @@
-// ==============================================================
-// <auto-generated>
-// This code automatically produced from an embedded resource.
-// Do not edit this file, or it will become incompatible with 
-// the specification from which it was generated.
-// </auto-generated>
-// ==============================================================
-
-using System;
-using System.IO;
-using System.Text;
-using System.Collections.Generic;
-using System.Diagnostics.CodeAnalysis;
-using System.Runtime.Serialization;
-using System.Globalization;
-
-namespace QUT.GplexBuffers
-{
-// Code copied from GPLEX embedded resource
-    [Serializable]
-    internal class BufferException : Exception
-    {
-        public BufferException() { }
-        public BufferException(string message) : base(message) { }
-        public BufferException(string message, Exception innerException)
-            : base(message, innerException) { }
-        protected BufferException(SerializationInfo info, StreamingContext context)
-            : base(info, context) { }
-    }
-
-    internal abstract class ScanBuff
-    {
-        private string fileNm;
-
-        public const int EndOfFile = -1;
-        public const int UnicodeReplacementChar = 0xFFFD;
-
-        public bool IsFile { get { return (fileNm != null); } }
-        public string FileName { get { return fileNm; } set { fileNm = value; } }
-
-        public abstract int Pos { get; set; }
-        public abstract int Read();
-        public virtual void Mark() { }
-
-        public abstract string GetString(int begin, int limit);
-
-        public static ScanBuff GetBuffer(string source)
-        {
-            return new StringBuffer(source);
-        }
-
-        public static ScanBuff GetBuffer(IList<string> source)
-        {
-            return new LineBuffer(source);
-        }
-
-#if (!NOFILES)
-        public static ScanBuff GetBuffer(Stream source)
-        {
-            return new BuildBuffer(source);
-        }
-
-#if (!BYTEMODE)
-        public static ScanBuff GetBuffer(Stream source, int fallbackCodePage)
-        {
-            return new BuildBuffer(source, fallbackCodePage);
-        }
-#endif // !BYTEMODE
-#endif // !NOFILES
-    }
-
-    #region Buffer classes
-
-    // ==============================================================
-    // =====  Definitions for various ScanBuff derived classes   ====
-    // ==============================================================
-    // ===============         String input          ================
-    // ==============================================================
-
-    /// <summary>
-    /// This class reads characters from a single string as
-    /// required, for example, by Visual Studio language services
-    /// </summary>
-    sealed class StringBuffer : ScanBuff
-    {
-        string str;        // input buffer
-        int bPos;          // current position in buffer
-        int sLen;
-
-        public StringBuffer(string source)
-        {
-            this.str = source;
-            this.sLen = source.Length;
-            this.FileName = null;
-        }
-
-        public override int Read()
-        {
-            if (bPos < sLen) return str[bPos++];
-            else if (bPos == sLen) { bPos++; return '\n'; }   // one strike, see new line
-            else { bPos++; return EndOfFile; }                // two strikes and you're out!
-        }
-
-        public override string GetString(int begin, int limit)
-        {
-            //  "limit" can be greater than sLen with the BABEL
-            //  option set.  Read returns a "virtual" EOL if
-            //  an attempt is made to read past the end of the
-            //  string buffer.  Without the guard any attempt 
-            //  to fetch yytext for a token that includes the 
-            //  EOL will throw an index exception.
-            if (limit > sLen) limit = sLen;
-            if (limit <= begin) return "";
-            else return str.Substring(begin, limit - begin);
-        }
-
-        public override int Pos
-        {
-            get { return bPos; }
-            set { bPos = value; }
-        }
-
-        public override string ToString() { return "StringBuffer"; }
-    }
-
-    // ==============================================================
-    //  The LineBuff class contributed by Nigel Horspool, 
-    //  nigelh@cs.uvic.cs
-    // ==============================================================
-
-    sealed class LineBuffer : ScanBuff
-    {
-        IList<string> line;    // list of source lines from a file
-        int numLines;          // number of strings in line list
-        string curLine;        // current line in that list
-        int cLine;             // index of current line in the list
-        int curLen;            // length of current line
-        int curLineStart;      // position of line start in whole file
-        int curLineEnd;        // position of line end in whole file
-        int maxPos;            // max position ever visited in whole file
-        int cPos;              // ordinal number of code in source
-
-        // Constructed from a list of strings, one per source line.
-        // The lines have had trailing '\n' characters removed.
-        public LineBuffer(IList<string> lineList)
-        {
-            line = lineList;
-            numLines = line.Count;
-            cPos = curLineStart = 0;
-            curLine = (numLines > 0 ? line[0] : "");
-            maxPos = curLineEnd = curLen = curLine.Length;
-            cLine = 1;
-            FileName = null;
-        }
-
-        public override int Read()
-        {
-            if (cPos < curLineEnd)
-                return curLine[cPos++ - curLineStart];
-            if (cPos++ == curLineEnd)
-                return '\n';
-            if (cLine >= numLines)
-                return EndOfFile;
-            curLine = line[cLine];
-            curLen = curLine.Length;
-            curLineStart = curLineEnd + 1;
-            curLineEnd = curLineStart + curLen;
-            if (curLineEnd > maxPos)
-                maxPos = curLineEnd;
-            cLine++;
-            return curLen > 0 ? curLine[0] : '\n';
-        }
-
-        // To speed up searches for the line containing a position
-        private int cachedPosition;
-        private int cachedIxdex;
-        private int cachedLineStart;
-
-        // Given a position pos within the entire source, the results are
-        //   ix     -- the index of the containing line
-        //   lstart -- the position of the first character on that line
-        private void findIndex(int pos, out int ix, out int lstart)
-        {
-            if (pos >= cachedPosition)
-            {
-                ix = cachedIxdex; lstart = cachedLineStart;
-            }
-            else
-            {
-                ix = lstart = 0;
-            }
-            while (ix < numLines)
-            {
-                int len = line[ix].Length + 1;
-                if (pos < lstart + len) break;
-                lstart += len;
-                ix++;
-            }
-            cachedPosition = pos;
-            cachedIxdex = ix;
-            cachedLineStart = lstart;
-        }
-
-        public override string GetString(int begin, int limit)
-        {
-            if (begin >= maxPos || limit <= begin) return "";
-            int endIx, begIx, endLineStart, begLineStart;
-            findIndex(begin, out begIx, out begLineStart);
-            int begCol = begin - begLineStart;
-            findIndex(limit, out endIx, out endLineStart);
-            int endCol = limit - endLineStart;
-            string s = line[begIx];
-            if (begIx == endIx)
-            {
-                // the usual case, substring all on one line
-                return (endCol <= s.Length) ?
-                    s.Substring(begCol, endCol - begCol)
-                    : s.Substring(begCol) + "\n";
-            }
-            // the string spans multiple lines, yuk!
-            StringBuilder sb = new StringBuilder();
-            if (begCol < s.Length)
-                sb.Append(s.Substring(begCol));
-            for (; ; )
-            {
-                sb.Append("\n");
-                s = line[++begIx];
-                if (begIx >= endIx) break;
-                sb.Append(s);
-            }
-            if (endCol <= s.Length)
-            {
-                sb.Append(s.Substring(0, endCol));
-            }
-            else
-            {
-                sb.Append(s);
-                sb.Append("\n");
-            }
-            return sb.ToString();
-        }
-
-        public override int Pos
-        {
-            get { return cPos; }
-            set
-            {
-                cPos = value;
-                findIndex(cPos, out cLine, out curLineStart);
-                // cLine should be the *next* line after curLine.
-                curLine = (cLine < numLines ? line[cLine++] : "");
-                curLineEnd = curLineStart + curLine.Length;
-            }
-        }
-
-        public override string ToString() { return "LineBuffer"; }
-    }
-
-#if (!NOFILES)
-    // ==============================================================
-    // =====     class BuildBuff : for unicode text files    ========
-    // ==============================================================
-
-    class BuildBuffer : ScanBuff
-    {
-        // Double buffer for char stream.
-        class BufferElement
-        {
-            StringBuilder bldr = new StringBuilder();
-            StringBuilder next = new StringBuilder();
-            int minIx;
-            int maxIx;
-            int brkIx;
-            bool appendToNext;
-
-            internal BufferElement() { }
-
-            internal int MaxIndex { get { return maxIx; } }
-            // internal int MinIndex { get { return minIx; } }
-
-            internal char this[int index]
-            {
-                get
-                {
-                    if (index < minIx || index >= maxIx)
-                        throw new BufferException("Index was outside data buffer");
-                    else if (index < brkIx)
-                        return bldr[index - minIx];
-                    else
-                        return next[index - brkIx];
-                }
-            }
-
-            internal void Append(char[] block, int count)
-            {
-                maxIx += count;
-                if (appendToNext)
-                    this.next.Append(block, 0, count);
-                else
-                {
-                    this.bldr.Append(block, 0, count);
-                    brkIx = maxIx;
-                    appendToNext = true;
-                }
-            }
-
-            internal string GetString(int start, int limit)
-            {
-                if (limit <= start)
-                    return "";
-                if (start >= minIx && limit <= maxIx)
-                    if (limit < brkIx) // String entirely in bldr builder
-                        return bldr.ToString(start - minIx, limit - start);
-                    else if (start >= brkIx) // String entirely in next builder
-                        return next.ToString(start - brkIx, limit - start);
-                    else // Must do a string-concatenation
-                        return
-                            bldr.ToString(start - minIx, brkIx - start) +
-                            next.ToString(0, limit - brkIx);
-                else
-                    throw new BufferException("String was outside data buffer");
-            }
-
-            internal void Mark(int limit)
-            {
-                if (limit > brkIx + 16) // Rotate blocks
-                {
-                    StringBuilder temp = bldr;
-                    bldr = next;
-                    next = temp;
-                    next.Length = 0;
-                    minIx = brkIx;
-                    brkIx = maxIx;
-                }
-            }
-        }
-
-        BufferElement data = new BufferElement();
-
-        int bPos;            // Postion index in the StringBuilder
-        BlockReader NextBlk; // Delegate that serves char-arrays;
-
-        private string EncodingName
-        {
-            get
-            {
-                StreamReader rdr = NextBlk.Target as StreamReader;
-                return (rdr == null ? "raw-bytes" : rdr.CurrentEncoding.BodyName);
-            }
-        }
-
-        public BuildBuffer(Stream stream)
-        {
-            FileStream fStrm = (stream as FileStream);
-            if (fStrm != null) FileName = fStrm.Name;
-            NextBlk = BlockReaderFactory.Raw(stream);
-        }
-
-#if (!BYTEMODE)
-        public BuildBuffer(Stream stream, int fallbackCodePage)
-        {
-            FileStream fStrm = (stream as FileStream);
-            if (fStrm != null) FileName = fStrm.Name;
-            NextBlk = BlockReaderFactory.Get(stream, fallbackCodePage);
-        }
-#endif
-
-        /// <summary>
-        /// Marks a conservative lower bound for the buffer,
-        /// allowing space to be reclaimed.  If an application 
-        /// needs to call GetString at arbitrary past locations 
-        /// in the input stream, Mark() is not called.
-        /// </summary>
-        public override void Mark() { data.Mark(bPos - 2); }
-
-        public override int Pos
-        {
-            get { return bPos; }
-            set { bPos = value; }
-        }
-
-
-        /// <summary>
-        /// Read returns the ordinal number of the next char, or 
-        /// EOF (-1) for an end of stream.  Note that the next
-        /// code point may require *two* calls of Read().
-        /// </summary>
-        /// <returns></returns>
-        public override int Read()
-        {
-            //
-            //  Characters at positions 
-            //  [data.offset, data.offset + data.bldr.Length)
-            //  are available in data.bldr.
-            //
-            if (bPos < data.MaxIndex)
-            {
-                // ch0 cannot be EOF
-                return (int)data[bPos++];
-            }
-            else // Read from underlying stream
-            {
-                // Experimental code, blocks of page size
-                char[] chrs = new char[4096];
-                int count = NextBlk(chrs, 0, 4096);
-                if (count == 0)
-                    return EndOfFile;
-                else
-                {
-                    data.Append(chrs, count);
-                    return (int)data[bPos++];
-                }
-            }
-        }
-
-        public override string GetString(int begin, int limit)
-        {
-            return data.GetString(begin, limit);
-        }
-
-        public override string ToString()
-        {
-            return "StringBuilder buffer, encoding: " + this.EncodingName;
-        }
-    }
-
-    // =============== End ScanBuff-derived classes ==================
-
-    internal delegate int BlockReader(char[] block, int index, int number);
-
-    // A delegate factory, serving up a delegate that
-    // reads a block of characters from the underlying
-    // encoded stream, via a StreamReader object.
-    //
-    internal static class BlockReaderFactory
-    {
-        public static BlockReader Raw(Stream stream)
-        {
-            return delegate(char[] block, int index, int number)
-            {
-                byte[] b = new byte[number];
-                int count = stream.Read(b, 0, number);
-                int i = 0;
-                int j = index;
-                for (; i < count; i++, j++)
-                    block[j] = (char)b[i];
-                return count;
-            };
-        }
-
-#if (!BYTEMODE)
-        public static BlockReader Get(Stream stream, int fallbackCodePage)
-        {
-            Encoding encoding;
-            int preamble = Preamble(stream);
-
-            if (preamble != 0)  // There is a valid BOM here!
-                encoding = Encoding.GetEncoding(preamble);
-            else if (fallbackCodePage == -1) // Fallback is "raw" bytes
-                return Raw(stream);
-            else if (fallbackCodePage != -2) // Anything but "guess"
-                encoding = Encoding.GetEncoding(fallbackCodePage);
-            else // This is the "guess" option
-            {
-                int guess = new Guesser(stream).GuessCodePage();
-                stream.Seek(0, SeekOrigin.Begin);
-                if (guess == -1) // ==> this is a 7-bit file
-                    encoding = Encoding.ASCII;
-                else if (guess == 65001)
-                    encoding = Encoding.UTF8;
-                else             // ==> use the machine default
-                    encoding = Encoding.Default;
-            }
-            StreamReader reader = new StreamReader(stream, encoding);
-            return reader.Read;
-        }
-
-        static int Preamble(Stream stream)
-        {
-            int b0 = stream.ReadByte();
-            int b1 = stream.ReadByte();
-
-            if (b0 == 0xfe && b1 == 0xff)
-                return 1201; // UTF16BE
-            if (b0 == 0xff && b1 == 0xfe)
-                return 1200; // UTF16LE
-
-            int b2 = stream.ReadByte();
-            if (b0 == 0xef && b1 == 0xbb && b2 == 0xbf)
-                return 65001; // UTF8
-            //
-            // There is no unicode preamble, so we
-            // return denoter for the machine default.
-            //
-            stream.Seek(0, SeekOrigin.Begin);
-            return 0;
-        }
-#endif // !BYTEMODE
-    }
-#endif // !NOFILES
-    #endregion Buffer classes
-
-    // ==============================================================
-    // ============      class CodePageHandling         =============
-    // ==============================================================
-#if (!NOFILES)
-    public static class CodePageHandling
-    {
-        public static int GetCodePage(string option)
-        {
-            string command = option.ToUpperInvariant();
-            if (command.StartsWith("CodePage:", StringComparison.OrdinalIgnoreCase))
-                command = command.Substring(9);
-            try
-            {
-                if (command.Equals("RAW"))
-                    return -1;
-                else if (command.Equals("GUESS"))
-                    return -2;
-                else if (command.Equals("DEFAULT"))
-                    return 0;
-                else if (char.IsDigit(command[0]))
-                    return int.Parse(command, CultureInfo.InvariantCulture);
-                else
-                {
-                    Encoding enc = Encoding.GetEncoding(command);
-                    return enc.CodePage;
-                }
-            }
-            catch (FormatException)
-            {
-                Console.Error.WriteLine(
-                    "Invalid format \"{0}\", using machine default", option);
-            }
-            catch (ArgumentException)
-            {
-                Console.Error.WriteLine(
-                    "Unknown code page \"{0}\", using machine default", option);
-            }
-            return 0;
-        }
-    }
-#region guesser
-#if (!BYTEMODE)
-    // ==============================================================
-    // ============          Encoding Guesser           =============
-    // ==============================================================
-
-    /// <summary>
-    /// This class provides a simple finite state automaton that
-    /// scans the file looking for (1) valid UTF-8 byte patterns,
-    /// (2) bytes >= 0x80 which are not part of a UTF-8 sequence.
-    /// The method then guesses whether it is UTF-8 or maybe some 
-    /// local machine default encoding.  This works well for the
-    /// various Latin encodings.
-    /// </summary>
-    internal class Guesser
-    {
-        ScanBuff buffer;
-
-        public int GuessCodePage() { return Scan(); }
-
-        const int maxAccept = 10;
-        const int initial = 0;
-        const int eofNum = 0;
-        const int goStart = -1;
-        const int INITIAL = 0;
-        const int EndToken = 0;
-
-        #region user code
-        /* 
-         *  Reads the bytes of a file to determine if it is 
-         *  UTF-8 or a single-byte code page file.
-         */
-        public long utfX;
-        public long uppr;
-        #endregion user code
-
-        int state;
-        int currentStart = startState[0];
-        int code;
-
-        #region ScannerTables
-        static int[] startState = new int[] { 11, 0 };
-
-        #region CharacterMap
-        static sbyte[] map = new sbyte[256] {
-/*     '\0' */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 
-/*   '\x10' */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 
-/*   '\x20' */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 
-/*      '0' */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 
-/*      '@' */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 
-/*      'P' */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 
-/*      '`' */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 
-/*      'p' */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 
-/*   '\x80' */ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 
-/*   '\x90' */ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 
-/*   '\xA0' */ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 
-/*   '\xB0' */ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 
-/*   '\xC0' */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 
-/*   '\xD0' */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 
-/*   '\xE0' */ 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 
-/*   '\xF0' */ 4, 4, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 5, 5, 5, 5 };
-        #endregion
-
-        static sbyte[][] nextState = new sbyte[][] {
-            new sbyte[] {0, 0, 0, 0, 0, 0},
-            new sbyte[] {-1, -1, 10, -1, -1, -1},
-            new sbyte[] {-1, -1, -1, -1, -1, -1},
-            new sbyte[] {-1, -1, 8, -1, -1, -1},
-            new sbyte[] {-1, -1, 5, -1, -1, -1},
-            new sbyte[] {-1, -1, 6, -1, -1, -1},
-            new sbyte[] {-1, -1, 7, -1, -1, -1},
-            null,
-            new sbyte[] {-1, -1, 9, -1, -1, -1},
-            null,
-            null,
-            new sbyte[] {-1, 1, 2, 3, 4, 2}
-        };
-
-
-        [SuppressMessage("Microsoft.Performance", "CA1810:InitializeReferenceTypeStaticFieldsInline")]
-        // Reason for suppression: cannot have self-reference in array initializer.
-        static Guesser()
-        {
-            nextState[7] = nextState[2];
-            nextState[9] = nextState[2];
-            nextState[10] = nextState[2];
-        }
-
-        int NextState()
-        {
-            if (code == ScanBuff.EndOfFile)
-                return eofNum;
-            else
-                return nextState[state][map[code]];
-        }
-        #endregion
-
-        public Guesser(System.IO.Stream file) { SetSource(file); }
-
-        public void SetSource(System.IO.Stream source)
-        {
-            this.buffer = new BuildBuffer(source);
-            code = buffer.Read();
-        }
-
-        int Scan()
-        {
-            for (; ; )
-            {
-                int next;
-                state = currentStart;
-                while ((next = NextState()) == goStart)
-                    code = buffer.Read();
-
-                state = next;
-                code = buffer.Read();
-
-                while ((next = NextState()) > eofNum)
-                {
-                    state = next;
-                    code = buffer.Read();
-                }
-                if (state <= maxAccept)
-                {
-                    #region ActionSwitch
-#pragma warning disable 162
-                    switch (state)
-                    {
-                        case eofNum:
-                            switch (currentStart)
-                            {
-                                case 11:
-                                    if (utfX == 0 && uppr == 0) return -1; /* raw ascii */
-                                    else if (uppr * 10 > utfX) return 0;   /* default code page */
-                                    else return 65001;                     /* UTF-8 encoding */
-                                    break;
-                            }
-                            return EndToken;
-                        case 1: // Recognized '{Upper128}',	Shortest string "\xC0"
-                        case 2: // Recognized '{Upper128}',	Shortest string "\x80"
-                        case 3: // Recognized '{Upper128}',	Shortest string "\xE0"
-                        case 4: // Recognized '{Upper128}',	Shortest string "\xF0"
-                            uppr++;
-                            break;
-                        case 5: // Recognized '{Utf8pfx4}{Utf8cont}',	Shortest string "\xF0\x80"
-                            uppr += 2;
-                            break;
-                        case 6: // Recognized '{Utf8pfx4}{Utf8cont}{2}',	Shortest string "\xF0\x80\x80"
-                            uppr += 3;
-                            break;
-                        case 7: // Recognized '{Utf8pfx4}{Utf8cont}{3}',	Shortest string "\xF0\x80\x80\x80"
-                            utfX += 3;
-                            break;
-                        case 8: // Recognized '{Utf8pfx3}{Utf8cont}',	Shortest string "\xE0\x80"
-                            uppr += 2;
-                            break;
-                        case 9: // Recognized '{Utf8pfx3}{Utf8cont}{2}',	Shortest string "\xE0\x80\x80"
-                            utfX += 2;
-                            break;
-                        case 10: // Recognized '{Utf8pfx2}{Utf8cont}',	Shortest string "\xC0\x80"
-                            utfX++;
-                            break;
-                        default:
-                            break;
-                    }
-#pragma warning restore 162
-                    #endregion
-                }
-            }
-        }
-    } // end class Guesser
-    
-#endif // !BYTEMODE
-#endregion
-#endif // !NOFILES
-
-// End of code copied from embedded resource
-}
@@ -1,884 +0,0 @@
-// ==============================================================
-// <auto-generated>
-// This code automatically produced from an embedded resource.
-// Do not edit this file, or it will become incompatible with 
-// the specification from which it was generated.
-// </auto-generated>
-// ==============================================================
-
-// Gardens Point Parser Generator
-// Copyright (c) Wayne Kelly, QUT 2005-2010
-// (see accompanying GPPGcopyright.rtf)
-
-using System;
-using System.Text;
-using System.Globalization;
-using System.Collections.Generic;
-using System.Runtime.Serialization;
-using System.Diagnostics.CodeAnalysis;
-
-namespace QUT.Gppg {
-    /// <summary>
-    /// Abstract class for GPPG shift-reduce parsers.
-    /// Parsers generated by GPPG derive from this base
-    /// class, overriding the abstract Initialize() and
-    /// DoAction() methods.
-    /// </summary>
-    /// <typeparam name="TValue">Semantic value type</typeparam>
-    /// <typeparam name="TSpan">Location type</typeparam>
-#if EXPORT_GPPG
-    public abstract class ShiftReduceParser<TValue, TSpan>
-#else
-    internal abstract class ShiftReduceParser<TValue, TSpan>
-#endif
- where TSpan : IMerge<TSpan>, new() {
-        private AbstractScanner<TValue, TSpan> scanner;
-        /// <summary>
-        /// The abstract scanner for this parser.
-        /// </summary>
-        protected AbstractScanner<TValue, TSpan> Scanner {
-            get { return scanner; }
-            set { scanner = value; }
-        }
-
-        /// <summary>
-        /// Constructor for base class
-        /// </summary>
-        /// <param name="scanner">Scanner instance for this parser</param>
-        protected ShiftReduceParser( AbstractScanner<TValue, TSpan> scanner ) {
-            this.scanner = scanner;
-        }
-
-        // ==============================================================
-        //                    TECHNICAL EXPLANATION.
-        //   Why the next two fields are not exposed via properties.
-        // ==============================================================
-        // These fields are of the generic parameter types, and are
-        // frequently instantiated as struct types in derived classes.
-        // Semantic actions are defined in the derived classes and refer
-        // to instance fields of these structs.  In such cases the code
-        // "get_CurrentSemanticValue().myField = blah;" will fail since
-        // the getter pushes the value of the field, not the reference.
-        // So, in the presence of properties, gppg would need to encode
-        // such field accesses as ... 
-        //  "tmp = get_CurrentSemanticValue(); // Fetch value
-        //   tmp.myField = blah;               // update
-        //   set_CurrentSemanticValue(tmp); "  // Write update back.
-        // There is no issue if TValue is restricted to be a ref type.
-        // The same explanation applies to scanner.yylval.
-        // ==============================================================
-        /// <summary>
-        /// The current value of the "$$" symbolic variable in the parser
-        /// </summary>
-        [SuppressMessage( "Microsoft.Design", "CA1051:DoNotDeclareVisibleInstanceFields" )]
-        protected TValue CurrentSemanticValue;
-
-        /// <summary>
-        /// The current value of the "@$" symbolic variable in the parser
-        /// </summary>
-        [SuppressMessage( "Microsoft.Design", "CA1051:DoNotDeclareVisibleInstanceFields" )]
-        protected TSpan CurrentLocationSpan;
-        protected int NextToken;
-
-        private TSpan LastSpan;
-        private State FsaState;
-        private bool recovering;
-        private int tokensSinceLastError;
-
-        private PushdownPrefixState<State> StateStack = new PushdownPrefixState<State>();
-        private PushdownPrefixState<TValue> valueStack = new PushdownPrefixState<TValue>();
-        private PushdownPrefixState<TSpan> locationStack = new PushdownPrefixState<TSpan>();
-
-        /// <summary>
-        /// The stack of semantic value (YYSTYPE) values.
-        /// </summary>
-        protected PushdownPrefixState<TValue> ValueStack { get { return valueStack; } }
-
-        /// <summary>
-        /// The stack of location value (YYLTYPE) varlues.
-        /// </summary>
-        protected PushdownPrefixState<TSpan> LocationStack { get { return locationStack; } }
-
-        private int errorToken;
-        private int endOfFileToken;
-        private string[] nonTerminals;
-        private State[] states;
-        private Rule[] rules;
-
-        /// <summary>
-        /// Initialization method to allow derived classes
-        /// to insert the rule list into this base class.
-        /// </summary>
-        /// <param name="rules">The array of Rule objects</param>
-        protected void InitRules( Rule[] rules ) { this.rules = rules; }
-
-        /// <summary>
-        /// Initialization method to allow derived classes to
-        /// insert the states table into this base class.
-        /// </summary>
-        /// <param name="states">The pre-initialized states table</param>
-        protected void InitStates( State[] states ) { this.states = states; }
-
-        /// <summary>
-        /// OBSOLETE FOR VERSION 1.4.0
-        /// </summary>
-        /// <param name="size"></param>
-        protected void InitStateTable( int size ) { states = new State[size]; }
-
-        /// <summary>
-        /// Initialization method to allow derived classes
-        /// to insert the special value for the error and EOF tokens.
-        /// </summary>
-        /// <param name="err">The error state ordinal</param>
-        /// <param name="end">The EOF stat ordinal</param>
-        protected void InitSpecialTokens( int err, int end ) {
-            errorToken = err;
-            endOfFileToken = end;
-        }
-
-        /// <summary>
-        /// Initialization method to allow derived classes to
-        /// insert the non-terminal symbol names into this base class.
-        /// </summary>
-        /// <param name="names">Non-terminal symbol names</param>
-        protected void InitNonTerminals( string[] names ) { nonTerminals = names; }
-
-        #region YYAbort, YYAccept etcetera.
-        [Serializable]
-        [SuppressMessage( "Microsoft.Design", "CA1064:ExceptionsShouldBePublic" )]
-        // Reason for FxCop message suppression -
-        // This exception cannot escape from the local context
-        private class AcceptException : Exception {
-            internal AcceptException() { }
-            protected AcceptException( SerializationInfo i, StreamingContext c ) : base( i, c ) { }
-        }
-        [Serializable]
-        [SuppressMessage( "Microsoft.Design", "CA1064:ExceptionsShouldBePublic" )]
-        // Reason for FxCop message suppression -
-        // This exception cannot escape from the local context
-        private class AbortException : Exception {
-            internal AbortException() { }
-            protected AbortException( SerializationInfo i, StreamingContext c ) : base( i, c ) { }
-        }
-        [Serializable]
-        [SuppressMessage( "Microsoft.Design", "CA1064:ExceptionsShouldBePublic" )]
-        // Reason for FxCop message suppression -
-        // This exception cannot escape from the local context
-        private class ErrorException : Exception {
-            internal ErrorException() { }
-            protected ErrorException( SerializationInfo i, StreamingContext c ) : base( i, c ) { }
-        }
-
-        // The following methods are only called from within
-        // a semantic action. The thrown exceptions can never
-        // propagate outside the ShiftReduceParser class in 
-        // which they are nested.
-
-        /// <summary>
-        /// Force parser to terminate, returning "true"
-        /// </summary>
-        protected static void YYAccept() { throw new AcceptException(); }
-
-        /// <summary>
-        /// Force parser to terminate, returning "false"
-        /// </summary>
-        protected static void YYAbort() { throw new AbortException(); }
-
-        /// <summary>
-        /// Force parser to terminate, returning
-        /// "false" if error recovery fails.
-        /// </summary>
-        protected static void YYError() { throw new ErrorException(); }
-
-        /// <summary>
-        /// Check if parser in error recovery state.
-        /// </summary>
-        protected bool YYRecovering { get { return recovering; } }
-        #endregion
-
-        /// <summary>
-        /// Abstract base method. ShiftReduceParser calls this
-        /// to initialize the base class data structures.  Concrete
-        /// parser classes must override this method.
-        /// </summary>
-        protected abstract void Initialize();
-
-        /// <summary>
-        /// Main entry point of the Shift-Reduce Parser.
-        /// </summary>
-        /// <returns>True if parse succeeds, else false for
-        /// unrecoverable errors</returns>
-        public bool Parse() {
-            Initialize();	// allow derived classes to instantiate rules, states and nonTerminals
-
-            NextToken = 0;
-            FsaState = states[0];
-
-            StateStack.Push( FsaState );
-            valueStack.Push( CurrentSemanticValue );
-            LocationStack.Push( CurrentLocationSpan );
-
-            while (true) {
-#if TRACE_ACTIONS
-                Console.Error.WriteLine("Entering state {0} ", FsaState.number);
-                DisplayStack();
-#endif
-                int action = FsaState.defaultAction;
-
-                if (FsaState.ParserTable != null) {
-                    if (NextToken == 0) {
-                        // We save the last token span, so that the location span
-                        // of production right hand sides that begin or end with a
-                        // nullable production will be correct.
-                        LastSpan = scanner.yylloc;
-                        NextToken = scanner.yylex();
-#if TRACE_ACTIONS
-                       Console.Error.WriteLine( "Reading: Next token is {0}", TerminalToString( NextToken ) );
-#endif
-                    }
-#if TRACE_ACTIONS
-                    else 
-                        Console.Error.WriteLine( "Next token is still {0}", TerminalToString( NextToken ) );
-#endif
-                    if (FsaState.ParserTable.ContainsKey( NextToken ))
-                        action = FsaState.ParserTable[NextToken];
-                }
-
-                if (action > 0)         // shift
-                {
-                    Shift( action );
-                }
-                else if (action < 0)   // reduce
-                {
-                    try {
-                        Reduce( -action );
-                        if (action == -1)	// accept
-                            return true;
-                    }
-                    catch (AbortException) {
-                            return false;
-                    }
-                    catch (AcceptException) {
-                        return true;
-                    }
-                    catch (ErrorException) {
-                        if (!ErrorRecovery())
-                            return false;
-                        else
-                            throw;  // Rethrow x, preserving information.
-                    }
-                }
-                else if (action == 0 && !ErrorRecovery()) // error
-                    return false;
-            }
-        }
-
-        private void Shift( int stateIndex ) {
-#if TRACE_ACTIONS
-				Console.Error.Write("Shifting token {0}, ", TerminalToString(NextToken));
-#endif
-            FsaState = states[stateIndex];
-
-            valueStack.Push( scanner.yylval );
-            StateStack.Push( FsaState );
-            LocationStack.Push( scanner.yylloc );
-
-            if (recovering) {
-                if (NextToken != errorToken)
-                    tokensSinceLastError++;
-
-                if (tokensSinceLastError > 5)
-                    recovering = false;
-            }
-
-            if (NextToken != endOfFileToken)
-                NextToken = 0;
-        }
-
-        private void Reduce( int ruleNumber ) {
-#if TRACE_ACTIONS
-				DisplayRule(ruleNumber);
-#endif
-            Rule rule = rules[ruleNumber];
-            int rhLen = rule.RightHandSide.Length;
-            //
-            //  Default actions for unit productions.
-            //
-            if (rhLen == 1) {
-                CurrentSemanticValue = valueStack.TopElement();   // Default action: $$ = $1;
-                CurrentLocationSpan = LocationStack.TopElement(); // Default action "@$ = @1;
-            }
-            else if (rhLen == 0) {
-                // Create a new blank value.
-                // Explicit semantic action may mutate this value
-                CurrentSemanticValue = default( TValue );
-                // The location span for an empty production will start with the
-                // beginning of the next lexeme, and end with the finish of the
-                // previous lexeme.  This gives the correct behaviour when this
-                // nonsense value is used in later Merge operations.
-                CurrentLocationSpan = (scanner.yylloc != null && LastSpan != null ?
-                    scanner.yylloc.Merge( LastSpan ) :
-                    default( TSpan ));
-            }
-            else {
-                // Default action: $$ = $1;
-                CurrentSemanticValue = valueStack[LocationStack.Depth - rhLen];
-                //  Default action "@$ = @1.Merge(@N)" for location info.
-                TSpan at1 = LocationStack[LocationStack.Depth - rhLen];
-                TSpan atN = LocationStack[LocationStack.Depth - 1];
-                CurrentLocationSpan =
-                    ((at1 != null && atN != null) ? at1.Merge( atN ) : default( TSpan ));
-            }
-
-            DoAction( ruleNumber );
-
-            for (int i = 0; i < rule.RightHandSide.Length; i++) {
-                StateStack.Pop();
-                valueStack.Pop();
-                LocationStack.Pop();
-            }
-            FsaState = StateStack.TopElement();
-
-            if (FsaState.Goto.ContainsKey( rule.LeftHandSide ))
-                FsaState = states[FsaState.Goto[rule.LeftHandSide]];
-
-            StateStack.Push( FsaState );
-            valueStack.Push( CurrentSemanticValue );
-            LocationStack.Push( CurrentLocationSpan );
-        }
-
-        /// <summary>
-        /// Execute the selected action from array.
-        /// Must be overriden in derived classes.
-        /// </summary>
-        /// <param name="actionNumber">Index of the action to perform</param>
-        protected abstract void DoAction( int actionNumber );
-
-        private bool ErrorRecovery() {
-            bool discard;
-
-            if (!recovering) // if not recovering from previous error
-                ReportError();
-
-            if (!FindErrorRecoveryState())
-                return false;
-            //
-            //  The interim fix for the "looping in error recovery"
-            //  artifact involved moving the setting of the recovering 
-            //  bool until after invalid tokens have been discarded.
-            //
-            ShiftErrorToken();
-            discard = DiscardInvalidTokens();
-            recovering = true;
-            tokensSinceLastError = 0;
-            return discard;
-        }
-
-        private void ReportError() {
-            StringBuilder errorMsg = new StringBuilder();
-            errorMsg.AppendFormat( "Syntax error, unexpected {0}", TerminalToString( NextToken ) );
-
-            if (FsaState.ParserTable.Count < 7) {
-                bool first = true;
-                foreach (int terminal in FsaState.ParserTable.Keys) {
-                    if (first)
-                        errorMsg.Append( ", expecting " );
-                    else
-                        errorMsg.Append( ", or " );
-
-                    errorMsg.Append( TerminalToString( terminal ) );
-                    first = false;
-                }
-            }
-            scanner.yyerror( errorMsg.ToString() );
-        }
-
-        private void ShiftErrorToken() {
-            int old_next = NextToken;
-            NextToken = errorToken;
-
-            Shift( FsaState.ParserTable[NextToken] );
-
-#if TRACE_ACTIONS
-				Console.Error.WriteLine("Entering state {0} ", FsaState.number);
-#endif
-            NextToken = old_next;
-        }
-
-        private bool FindErrorRecoveryState() {
-            while (true)    // pop states until one found that accepts error token
-            {
-                if (FsaState.ParserTable != null &&
-                    FsaState.ParserTable.ContainsKey( errorToken ) &&
-                    FsaState.ParserTable[errorToken] > 0) // shift
-                    return true;
-
-#if TRACE_ACTIONS
-					Console.Error.WriteLine("Error: popping state {0}", StateStack.TopElement().number);
-#endif
-                StateStack.Pop();
-                valueStack.Pop();
-                LocationStack.Pop();
-
-#if TRACE_ACTIONS
-			    DisplayStack();
-#endif
-                if (StateStack.IsEmpty()) {
-#if TRACE_ACTIONS
-                        Console.Error.WriteLine("Aborting: didn't find a state that accepts error token");
-#endif
-                    return false;
-                }
-                else
-                    FsaState = StateStack.TopElement();
-            }
-        }
-
-        private bool DiscardInvalidTokens() {
-
-            int action = FsaState.defaultAction;
-
-            if (FsaState.ParserTable != null) {
-                // Discard tokens until find one that works ...
-                while (true) {
-                    if (NextToken == 0) {
-#if TRACE_ACTIONS
-                            Console.Error.Write("Reading a token: ");
-#endif
-                        NextToken = scanner.yylex();
-                    }
-#if TRACE_ACTIONS
-                        Console.Error.WriteLine("Next token is {0}", TerminalToString(NextToken));
-#endif
-                    if (NextToken == endOfFileToken)
-                        return false;
-
-                    if (FsaState.ParserTable.ContainsKey( NextToken ))
-                        action = FsaState.ParserTable[NextToken];
-
-                    if (action != 0)
-                        return true;
-                    else {
-#if TRACE_ACTIONS
-                            Console.Error.WriteLine("Error: Discarding {0}", TerminalToString(NextToken));
-#endif
-                        NextToken = 0;
-                    }
-                }
-            }
-            else if (recovering && tokensSinceLastError == 0) {
-                // 
-                //  Boolean recovering is not set until after the first
-                //  error token has been shifted.  Thus if we get back 
-                //  here with recovering set and no tokens read we are
-                //  looping on the same error recovery action.  This 
-                //  happens if current_state.ParserTable is null because
-                //  the state has an LR(0) reduction, but not all
-                //  lookahead tokens are valid.  This only occurs for
-                //  error productions that *end* on "error".
-                //
-                //  This action discards tokens one at a time until
-                //  the looping stops.  Another attack would be to always
-                //  use the LALR(1) table if a production ends on "error"
-                //
-#if TRACE_ACTIONS
-                    Console.Error.WriteLine("Error: panic discard of {0}", TerminalToString(NextToken));
-#endif
-                if (NextToken == endOfFileToken)
-                    return false;
-                NextToken = 0;
-                return true;
-            }
-            else
-                return true;
-        }
-
-        /// <summary>
-        /// Traditional YACC method.  Discards the next input token.
-        /// </summary>
-        [SuppressMessage( "Microsoft.Naming", "CA1709:IdentifiersShouldBeCasedCorrectly", MessageId = "yyclearin" )]
-        [SuppressMessage( "Microsoft.Naming", "CA1704:IdentifiersShouldBeSpelledCorrectly", MessageId = "yyclearin" )]
-        // Reason for FxCop message suppression -
-        // This is a traditional name for YACC-like functionality
-        protected void yyclearin() { NextToken = 0; }
-
-        /// <summary>
-        /// Tradional YACC method. Clear the "recovering" flag.
-        /// </summary>
-        [SuppressMessage( "Microsoft.Naming", "CA1709:IdentifiersShouldBeCasedCorrectly", MessageId = "yyerrok" )]
-        [SuppressMessage( "Microsoft.Naming", "CA1704:IdentifiersShouldBeSpelledCorrectly", MessageId = "yyerrok" )]
-        // Reason for FxCop message suppression -
-        // This is a traditional name for YACC-like functionality
-        protected void yyerrok() { recovering = false; }
-
-        /// <summary>
-        /// OBSOLETE FOR VERSION 1.4.0
-        /// Method used by derived types to insert new
-        /// state instances in the "states" array.
-        /// </summary>
-        /// <param name="stateNumber">index of the state</param>
-        /// <param name="state">data for the state</param>
-        protected void AddState( int stateNumber, State state ) {
-            states[stateNumber] = state;
-            state.number = stateNumber;
-        }
-
-        private void DisplayStack() {
-            Console.Error.Write( "State stack is now:" );
-            for (int i = 0; i < StateStack.Depth; i++)
-                Console.Error.Write( " {0}", StateStack[i].number );
-            Console.Error.WriteLine();
-        }
-
-        private void DisplayRule( int ruleNumber ) {
-            Console.Error.Write( "Reducing stack by rule {0}, ", ruleNumber );
-            DisplayProduction( rules[ruleNumber] );
-        }
-
-        private void DisplayProduction( Rule rule ) {
-            if (rule.RightHandSide.Length == 0)
-                Console.Error.Write( "/* empty */ " );
-            else
-                foreach (int symbol in rule.RightHandSide)
-                    Console.Error.Write( "{0} ", SymbolToString( symbol ) );
-
-            Console.Error.WriteLine( "-> {0}", SymbolToString( rule.LeftHandSide ) );
-        }
-
-        /// <summary>
-        /// Abstract state class naming terminal symbols.
-        /// This is overridden by derived classes with the
-        /// name (or alias) to be used in error messages.
-        /// </summary>
-        /// <param name="terminal">The terminal ordinal</param>
-        /// <returns></returns>
-        protected abstract string TerminalToString( int terminal );
-
-        private string SymbolToString( int symbol ) {
-            if (symbol < 0)
-                return nonTerminals[-symbol - 1];
-            else
-                return TerminalToString( symbol );
-        }
-
-        /// <summary>
-        /// Return text representation of argument character
-        /// </summary>
-        /// <param name="input">The character to convert</param>
-        /// <returns>String representation of the character</returns>
-        protected static string CharToString( char input ) {
-            switch (input) {
-                case '\a': return @"'\a'";
-                case '\b': return @"'\b'";
-                case '\f': return @"'\f'";
-                case '\n': return @"'\n'";
-                case '\r': return @"'\r'";
-                case '\t': return @"'\t'";
-                case '\v': return @"'\v'";
-                case '\0': return @"'\0'";
-                default: return string.Format( CultureInfo.InvariantCulture, "'{0}'", input );
-            }
-        }
-    }
-
-    /// <summary>
-    /// Classes implementing this interface must supply a
-    /// method that merges two location objects to return
-    /// a new object of the same type.
-    /// GPPG-generated parsers have the default location
-    /// action equivalent to "@$ = @1.Merge(@N);" where N
-    /// is the right-hand-side length of the production.
-    /// </summary>
-    /// <typeparam name="TSpan">The Location type</typeparam>
-#if EXPORT_GPPG
-    public interface IMerge<TSpan>
-#else
-    internal interface IMerge<TSpan>
-#endif
- {
-        /// <summary>
-        /// Interface method that creates a location object from
-        /// the current and last object.  Typically used to create
-        /// a location object extending from the start of the @1
-        /// object to the end of the @N object.
-        /// </summary>
-        /// <param name="last">The lexically last object to merge</param>
-        /// <returns>The merged location object</returns>
-        TSpan Merge( TSpan last );
-    }
-
-    /// <summary>
-    /// This is the default class that carries location
-    /// information from the scanner to the parser.
-    /// If you don't declare "%YYLTYPE Foo" the parser
-    /// will expect to deal with this type.
-    /// </summary>
-#if EXPORT_GPPG
-    public class LexLocation : IMerge<LexLocation>
-#else
-    [SuppressMessage( "Microsoft.Performance", "CA1812:AvoidUninstantiatedInternalClasses" )]
-    internal class LexLocation : IMerge<LexLocation>
-#endif
- {
-        private int startLine;   // start line
-        private int startColumn; // start column
-        private int endLine;     // end line
-        private int endColumn;   // end column
-
-        /// <summary>
-        /// The line at which the text span starts.
-        /// </summary>
-        public int StartLine { get { return startLine; } }
-
-        /// <summary>
-        /// The column at which the text span starts.
-        /// </summary>
-        public int StartColumn { get { return startColumn; } }
-
-        /// <summary>
-        /// The line on which the text span ends.
-        /// </summary>
-        public int EndLine { get { return endLine; } }
-
-        /// <summary>
-        /// The column of the first character
-        /// beyond the end of the text span.
-        /// </summary>
-        public int EndColumn { get { return endColumn; } }
-
-        /// <summary>
-        /// Default no-arg constructor.
-        /// </summary>
-        public LexLocation() { }
-
-        /// <summary>
-        /// Constructor for text-span with given start and end.
-        /// </summary>
-        /// <param name="sl">start line</param>
-        /// <param name="sc">start column</param>
-        /// <param name="el">end line </param>
-        /// <param name="ec">end column</param>
-        public LexLocation( int sl, int sc, int el, int ec ) { startLine = sl; startColumn = sc; endLine = el; endColumn = ec; }
-
-        /// <summary>
-        /// Create a text location which spans from the 
-        /// start of "this" to the end of the argument "last"
-        /// </summary>
-        /// <param name="last">The last location in the result span</param>
-        /// <returns>The merged span</returns>
-        public LexLocation Merge( LexLocation last ) { return new LexLocation( this.startLine, this.startColumn, last.endLine, last.endColumn ); }
-    }
-
-    /// <summary>
-    /// Abstract scanner class that GPPG expects its scanners to 
-    /// extend.
-    /// </summary>
-    /// <typeparam name="TValue">Semantic value type YYSTYPE</typeparam>
-    /// <typeparam name="TSpan">Source location type YYLTYPE</typeparam>
-#if EXPORT_GPPG
-    public abstract class AbstractScanner<TValue, TSpan>
-#else
-    internal abstract class AbstractScanner<TValue, TSpan>
-#endif
- where TSpan : IMerge<TSpan> {
-        /// <summary>
-        /// Lexical value optionally set by the scanner. The value
-        /// is of the %YYSTYPE type declared in the parser spec.
-        /// </summary>
-        [SuppressMessage( "Microsoft.Design", "CA1051:DoNotDeclareVisibleInstanceFields" )]
-        [SuppressMessage( "Microsoft.Naming", "CA1709:IdentifiersShouldBeCasedCorrectly", MessageId = "yylval" )]
-        [SuppressMessage( "Microsoft.Naming", "CA1704:IdentifiersShouldBeSpelledCorrectly", MessageId = "yylval" )]
-        // Reason for FxCop message suppression -
-        // This is a traditional name for YACC-like functionality
-        // A field must be declared for this value of parametric type,
-        // since it may be instantiated by a value struct.  If it were 
-        // implemented as a property, machine generated code in derived
-        // types would not be able to select on the returned value.
-#pragma warning disable 649
-        public TValue yylval;                     // Lexical value: set by scanner
-#pragma warning restore 649
-
-        /// <summary>
-        /// Current scanner location property. The value is of the
-        /// type declared by %YYLTYPE in the parser specification.
-        /// </summary>
-        [SuppressMessage( "Microsoft.Naming", "CA1709:IdentifiersShouldBeCasedCorrectly", MessageId = "yylloc" )]
-        [SuppressMessage( "Microsoft.Naming", "CA1704:IdentifiersShouldBeSpelledCorrectly", MessageId = "yylloc" )]
-        // Reason for FxCop message suppression -
-        // This is a traditional name for YACC-like functionality
-        public virtual TSpan yylloc {
-            get { return default( TSpan ); }       // Empty implementation allowing
-            set { /* skip */ }                   // yylloc to be ignored entirely.
-        }
-
-        /// <summary>
-        /// Main call point for LEX-like scanners.  Returns an int
-        /// corresponding to the token recognized by the scanner.
-        /// </summary>
-        /// <returns>An int corresponding to the token</returns>
-        [SuppressMessage( "Microsoft.Naming", "CA1709:IdentifiersShouldBeCasedCorrectly", MessageId = "yylex" )]
-        [SuppressMessage( "Microsoft.Naming", "CA1704:IdentifiersShouldBeSpelledCorrectly", MessageId = "yylex" )]
-        // Reason for FxCop message suppression -
-        // This is a traditional name for YACC-like functionality
-        public abstract int yylex();
-
-        /// <summary>
-        /// Traditional error reporting provided by LEX-like scanners
-        /// to their YACC-like clients.
-        /// </summary>
-        /// <param name="format">Message format string</param>
-        /// <param name="args">Optional array of args</param>
-        [SuppressMessage( "Microsoft.Naming", "CA1709:IdentifiersShouldBeCasedCorrectly", MessageId = "yyerror" )]
-        [SuppressMessage( "Microsoft.Naming", "CA1704:IdentifiersShouldBeSpelledCorrectly", MessageId = "yyerror" )]
-        // Reason for FxCop message suppression -
-        // This is a traditional name for YACC-like functionality
-        public virtual void yyerror( string format, params object[] args ) { }
-    }
-
-    /// <summary>
-    /// Encapsulated state for the parser.
-    /// Opaque to users, visible to the tool-generated code.
-    /// </summary>
-#if EXPORT_GPPG
-    public class State
-    {
-        /// <summary>
-        /// The number of states in the automaton.
-        /// </summary>
-        public int number;
-#else
-    internal class State {
-        /// <summary>
-        /// The index of this state in the states array.
-        /// </summary>
-        internal int number;
-#endif
-        internal Dictionary<int, int> ParserTable;   // Terminal -> ParseAction
-        internal Dictionary<int, int> Goto;          // NonTerminal -> State;
-        internal int defaultAction; // = 0;		     // ParseAction
-
-        /// <summary>
-        /// State transition data for this state. Pairs of elements of the 
-        /// goto array associate symbol ordinals with next state indices.
-        /// The actions array is passed to another constructor. 
-        /// </summary>
-        /// <param name="actions">The action list</param>c
-        /// <param name="goToList">Next state data</param>
-        public State( int[] actions, int[] goToList )
-            : this( actions ) {
-            Goto = new Dictionary<int, int>();
-            for (int i = 0; i < goToList.Length; i += 2)
-                Goto.Add( goToList[i], goToList[i + 1] );
-        }
-
-        /// <summary>
-        /// Action data for this state. Pairs of elements of the 
-        /// action array associate action ordinals with each of
-        /// those symbols that have actions in the current state.
-        /// </summary>
-        /// <param name="actions">The action array</param>
-        public State( int[] actions ) {
-            ParserTable = new Dictionary<int, int>();
-            for (int i = 0; i < actions.Length; i += 2)
-                ParserTable.Add( actions[i], actions[i + 1] );
-        }
-
-        /// <summary>
-        /// Set the default action for this state.
-        /// </summary>
-        /// <param name="defaultAction">Ordinal of the default action</param>
-        public State( int defaultAction ) {
-            this.defaultAction = defaultAction;
-        }
-
-        /// <summary>
-        /// Set the default action and the state transition table.
-        /// </summary>
-        /// <param name="defaultAction">The default action</param>
-        /// <param name="goToList">Transitions from this state</param>
-        public State( int defaultAction, int[] goToList )
-            : this( defaultAction ) {
-            Goto = new Dictionary<int, int>();
-            for (int i = 0; i < goToList.Length; i += 2)
-                Goto.Add( goToList[i], goToList[i + 1] );
-        }
-    }
-
-    /// <summary>
-    /// Rule representation at runtime.
-    /// </summary>
-#if EXPORT_GPPG
-    public class Rule
-#else
-    internal class Rule
-#endif
- {
-        internal int LeftHandSide; // symbol
-        internal int[] RightHandSide; // symbols
-
-        /// <summary>
-        /// Rule constructor.  This holds the ordinal of
-        /// the left hand side symbol, and the list of
-        /// right hand side symbols, in lexical order.
-        /// </summary>
-        /// <param name="left">The LHS non-terminal</param>
-        /// <param name="right">The RHS symbols, in lexical order</param>
-        public Rule( int left, int[] right ) {
-            this.LeftHandSide = left;
-            this.RightHandSide = right;
-        }
-    }
-
-    /// <summary>
-    /// Stack utility for the shift-reduce parser.
-    /// GPPG parsers have three instances:
-    /// (1) The parser state stack, T = QUT.Gppg.State,
-    /// (2) The semantic value stack, T = TValue,
-    /// (3) The location stack, T = TSpan.
-    /// </summary>
-    /// <typeparam name="T"></typeparam>
-#if EXPORT_GPPG
-    public class PushdownPrefixState<T>
-#else
-    internal class PushdownPrefixState<T>
-#endif
- {
-        //  Note that we cannot use the BCL Stack<T> class
-        //  here as derived types need to index into stacks.
-        //
-        private T[] array = new T[8];
-        private int tos = 0;
-
-        /// <summary>
-        /// Indexer for values of the stack below the top.
-        /// </summary>
-        /// <param name="index">index of the element, starting from the bottom</param>
-        /// <returns>the selected element</returns>
-        public T this[int index] { get { return array[index]; } }
-
-        /// <summary>
-        /// The current depth of the stack.
-        /// </summary>
-        public int Depth { get { return tos; } }
-
-        internal void Push( T value ) {
-            if (tos >= array.Length) {
-                T[] newarray = new T[array.Length * 2];
-                System.Array.Copy( array, newarray, tos );
-                array = newarray;
-            }
-            array[tos++] = value;
-        }
-
-        internal T Pop() {
-            T rslt = array[--tos];
-            array[tos] = default( T );
-            return rslt;
-        }
-
-        internal T TopElement() { return array[tos - 1]; }
-
-        internal bool IsEmpty() { return tos == 0; }
-    }
-}
-
@@ -1,17 +0,0 @@
-<Project Sdk="Microsoft.NET.Sdk">
-
-  <PropertyGroup>
-    <TargetFramework>net7.0</TargetFramework>
-    <Nullable>enable</Nullable>
-  </PropertyGroup>
-
-  <ItemGroup>
-    <ProjectReference Include="..\ArithmeticExpressions\ArithmeticExpressions.csproj" />
-    <ProjectReference Include="..\BaseUtilities\BaseUtilities.csproj" />    
-    <ProjectReference Include="..\BooleanExpressions\BooleanExpressions.csproj" />
-    <ProjectReference Include="..\DataStreamCore\DataStreamCore.csproj" />
-    <ProjectReference Include="..\DataStreamExpressions\DataStreamExpressions.csproj" />
-    <ProjectReference Include="..\..\client\spark_core\spark_core.csproj" />
-  </ItemGroup>
-
-</Project>
@@ -1,32 +0,0 @@
-using BCG;
-
-namespace BCG
-{
-   // this is a stream so we can run it from the DSQA (since dsqa can only load streams)
-   [DataStreamUserRespresentation("add_to_cloud")]
-   public class AddToCloudStream : ViewStream
-   {
-      private readonly string _name, _stream_exp;
-      private StreamOffloadRequestor _requestor = new StreamOffloadRequestor();
-      public AddToCloudStream(string name, params string[] lines)
-      : this(name, 0, lines)
-      {
-      }
-
-      public AddToCloudStream(string name, int persist, params string[] lines)
-      {
-         _name = name;
-         _stream_exp = getExpression(lines);
-         _requestor.add_to_cloud(_name, _stream_exp, persist == 1);
-         mySetRealSource(new TableStream("cloud_streams"));
-      }
-
-      static string getExpression(params string[] lines) {
-         for (int i = 0; i < lines.Length; i++) {
-            // unescape quotes
-            lines[i] = lines[i].Replace("\\\"", "\"");
-         }
-         return string.Join("\n", lines);
-      }
-   }
-}
@@ -1,100 +0,0 @@
-using BCG;
-
-using System;
-using System.Collections.Generic;
-
-using mbts.config;
-using bts.utils;
-using System.Threading.Tasks;
-using Bts.DataStreamExpressions;
-using System.Collections.Generic;
-using BCG.Utilities.General;
-
-namespace BCG
-{
-   // listens to the requests posted on "cloud_streams" request table, and 
-   // if unfulfilled starts a ViewPubsliher
-   public class CloudStreamManager : IWorker
-   {
-      public class StreamPubUnit
-      {
-         public string name;
-         public string stream_expression;
-         public ViewStream stream;
-         public bool persist;
-         public ViewPublisher view_publisher;
-
-         public StreamPubUnit(string name_, string stream_expression_, ViewStream stream_, bool persist_, ViewPublisher view_publisher_)
-         {
-            name = name_;
-            stream_expression = stream_expression_;
-            stream = stream_;
-            persist = persist_;
-            view_publisher = view_publisher_;
-         }
-      }
-      static ViewStream build_stream(string stream_expression)
-      {
-         try
-         {
-            var exp = DataStreamExpressionsInterpreter.Evaluate(stream_expression);
-            var rv = exp.getView(new Dictionary<string, StatementExpression>(0));
-            return rv;
-
-         }
-         catch (Exception ex)
-         {
-            bts.Log.assert(false, $"Could not build stream: {stream_expression} ex: {ex}");
-            return null;
-         }
-      }
-      private IDictionary<string, StreamPubUnit>
-         _stream_pub_map = new Dictionary<string, StreamPubUnit>();
-      private ViewStream _stream = new TableStream("cloud_streams");
-      private PubTableBroker _broker = new PubTableBroker();
-
-      public CloudStreamManager()
-      {
-         _stream.onChange += _on_str;
-
-      }
-      private void _on_str(object obj)
-      {
-         DataPacket dp = obj as DataPacket;
-         foreach (IBlueRow r in dp.newRows)
-         {
-            string name = r.get<string>("name");
-            bool persist = r.get<bool>("persist");
-            string stream_exp = r.get<string>("stream_exp");
-            if (!_stream_pub_map.ContainsKey(name))
-            {
-               _assign(name, stream_exp, persist);
-            }
-         }
-      }
-
-      private void _assign(string name, string stream_expression, bool persist)
-      {
-         bts.Log.Gen.info($"CloudStreamManager.assign name: {name} stream_expression: {stream_expression}");
-         ViewStream stream = build_stream(stream_expression);
-         _expose_to_ws(name, stream);
-         if (persist)
-         {
-            stream = new PersistorStream(stream, name, "C:\\Temp\\", 1000000);   // 10MBs
-         }
-         ViewPublisher view_pub = new ViewPublisher(name, _broker, stream);
-         StreamPubUnit u = new StreamPubUnit(name, stream_expression, stream, persist, view_pub);
-         _stream_pub_map.Add(name, u);
-      }
-
-      private void _expose_to_ws(string name, ViewStream stream)
-      {
-         // TODO: john
-      }
-
-      public void doWork()
-      {
-
-      }
-   }
-}
@@ -1,59 +0,0 @@
-using BCG;
-
-using System.Linq;
-
-namespace BCG
-{
-   public class StreamOffloadRequestor
-   {
-      public class OffloadOp
-      {
-         string name;
-         string stream_exp;
-      }
-      private IBlueTableSchema _schema;
-      private IBlueRowCollection _rows;
-      private PubTableBroker _broker = new PubTableBroker();
-      ViewStream _existing_offloads_vs = new TableStream("cloud_streams");
-      public StreamOffloadRequestor()
-      {
-         _schema = new BlueTableSchema("cloud_streams",
-                                   new ColumnInfo("id", 0, typeof(int)),
-                                   new ColumnInfo("name", 1, typeof(string)),
-                                   new ColumnInfo("persist", 2, typeof(bool)),
-                                   new ColumnInfo("stream_exp", 3, typeof(string)));
-         _existing_offloads_vs.onChange += _on_str;
-      }
-      private void _on_str(object obj)
-      {
-         DataPacket dp = obj as DataPacket;
-         _rows = dp.newRows;
-         // this is needed so the broker knows the state of the table
-         _broker.createTable(_rows);
-      }
-      public void add_to_cloud(string name, string stream_exp, bool persist)
-      {
-         // check if it exists
-         if (_rows == null)
-         {
-            BlueTable table = new BlueTable(_schema);
-            IBlueRow nr = new BlueRow(_schema, 0, name, persist, stream_exp);
-            table.addRow(nr);
-            _broker.createTable(table);
-            // create table  
-         }
-         else
-         {
-            if (exists(name))
-               return;
-            IBlueRow nr = new BlueRow(_schema, _rows.Count, name, persist, stream_exp);
-            _broker.addRow(nr);
-         }
-      }
-
-      bool exists(string name)
-      {
-         return _rows.to_ienum().Where(r => name == r.get<string>("name")).Count() > 0;
-      }
-   }
-}
@@ -1,105 +0,0 @@
-using System;
-using System.Collections;
-
-namespace BCG
-{
-   internal class AddColumnsRow : IBlueRow
-   {
-      private IBlueTableSchema mySchema;
-      private IBlueRow myRow;
-      //private object[] myCachedValues;
-
-      #region Constructors
-      public AddColumnsRow (IBlueTableSchema schema, IBlueRow row)
-      {
-         mySchema = schema;
-         myRow = row;
-         //myCachedValues = new object[schema.columnNames.Length];
-      }
-      #endregion
-
-      #region IBlueRow members
-      public IBlueTableSchema schema{get{return mySchema;}}
-      #endregion
-
-      #region ICollection members
-      public int Count {get{return mySchema.columnNames.Length;}}
-
-      public bool IsSynchronized {get{return false;}}
-
-      public object SyncRoot {get{return this;}}
-
-      public void CopyTo (Array array, int index)  
-      {
-         int i = index;
-         foreach (object o in this as IEnumerable)
-            array.SetValue (o, i++);
-      }
-      #endregion
-
-      #region IDictionary members
-      public bool IsFixedSize {get{return true;}}
-
-      public bool IsReadOnly {get{return true;}}
-
-      /// <summary>
-      /// The key can either be the string corrsponding to the column name or
-      /// the order of the column
-      /// </summary>
-      public object this [object key]
-      {
-         get
-         {
-            if (key is string)
-               return this[(string)key];
-            return this[(int)key];
-         }
-         set {throw new NotSupportedException ("The IBlueRow is readonly");}
-      }
-
-      public object this[int index]
-      {
-         get
-         {
-            //if (myCachedValues[index] == null)
-            //   myCachedValues[index] = mySchema[index].isConstant ? mySchema[index].colValue : myRow[index];
-            //return myCachedValues[index];
-            return mySchema[index].isConstant ? mySchema[index].colValue : myRow[index];
-         }
-      }
-
-      public object this[string colName]  {get{return this[mySchema[colName].colNo];}}
-
-      public ICollection Keys{get{return mySchema.columnNames;}}
-
-      public ICollection Values
-      {
-         get
-         {
-            object[] retVal = new object[mySchema.columnNames.Length];
-            CopyTo (retVal, 0);
-            return retVal;
-         }
-      }
-
-      public void Add (object key, object value)   {throw new NotSupportedException ("The IBlueRow is readonly");}
-
-      public void Clear () {throw new NotSupportedException ("The IBlueRow is readonly");}
-
-      public bool Contains (object key){return mySchema[(string)key] != null;}
-
-      /// <summary>
-      /// Note, the default enumerator is the IDictionary's enumerator, so if user needs to
-      /// iterate through the values, typecast this into an IEnumerable
-      /// </summary>
-      /// <returns></returns>
-      public IDictionaryEnumerator GetEnumerator() {return new BlueRowDictionaryEnumerator(this);}
-      
-      IEnumerator IEnumerable.GetEnumerator () {return new BlueRowEnumerator(this);}
-
-      public void Remove (object key) {throw new NotSupportedException ("The IBlueRow is readonly");}
-      #endregion
-
-   }
-
-}
@@ -1,13 +0,0 @@
-using System;
-using System.Data;
-using System.Collections;
-using BCG.Utilities;
-using BCG.Utilities.General;
-namespace BCG
-{
-
-   public class AddColumnsStream : MapStream
-   {
-      public AddColumnsStream(ViewStream vs, string columnDef) : base (vs, new ColumnAdder (columnDef))  {}    
-   }
-}
@@ -1,13 +0,0 @@
-
-// using System;
-
-// namespace BCG {
-
-//    public class AddRegexColumnsStream : ViewStream {
-
-//       public AddRegexColumnsStream (ViewStream vs, string srcCol, string regex, string newColDefs) {
-//          IStreamMapper mapper = new RegexMatchAdder (srcCol, newColDefs, regex);
-//          mySetRealSource (new MapStream (vs, mapper));
-//       }
-//    }
-// }
@@ -1,73 +0,0 @@
-// using System;
-// using System.Collections;
-// using BCG.Utilities;
-// using BCG.Evaluator.AddColumnsExpression;
-
-// namespace BCG
-// {
-//    /// <summary>
-//    /// Provides methods to add columns to the schema
-//    /// </summary>
-//    public class ColumnAdder : IStreamMapper
-//    {
-//       protected IDictionary myNewColumns;
-//       protected IBlueTableSchema mySchema;
-
-//       static syntax myParser =
-//          new syntax();
-
-//       /// <summary>
-//       /// string represting the columns to be added to the output table. 
-//       /// </summary>
-//       /// <param name="colAddExpression"></param>
-//       public ColumnAdder (string columnDef)
-//       {
-//          AddColumnsExpression ace;
-
-//          if (DataStreamLoadFileConfig.instance.useStaticParser)
-//          {
-//             lock (myParser)
-//             {
-//                ace =
-//                (AddColumnsExpression)myParser.Parse(columnDef);
-//             }
-//          }
-//          else
-//          {
-//             syntax parser = new syntax();
-//             ace =
-//             (AddColumnsExpression)parser.Parse(columnDef);
-//          }
-
-// 	 if (ace == null)
-// 	   throw new Exception ("Invalid columnn expression: " + columnDef);
-//          myNewColumns = ace.columns;
-//       }
-         
-//       public virtual IBlueRow map (IBlueRow row)
-//       {
-//          if (mySchema == null)
-//             myConstructSchema (row.schema);
-//          return new AddColumnsRow (mySchema, row);
-//       }
-
-//       public IBlueTableSchema getOutputSchema (IBlueTableSchema inputSchema)
-//       {
-//          myConstructSchema (inputSchema);
-//          return mySchema;
-//       }
-
-//       private void myConstructSchema (IBlueTableSchema schema)
-//       {
-//          ColumnInfo[] cis = new ColumnInfo[schema.columnNames.Length + myNewColumns.Count];
-//          int ciIndex = 0;
-//          foreach (ColumnInfo ci in schema.columnInfo)
-//             cis[ciIndex++] = ci;
-//          foreach (DictionaryEntry de in myNewColumns)
-//             cis[ciIndex] = new ColumnInfo ((string)de.Key, ciIndex ++, 
-//                ((AddColumnsExpression.ConstantInfo)de.Value).t, ((AddColumnsExpression.ConstantInfo)de.Value).v);
-//          mySchema = new BlueTableSchema (cis, schema.tableName);
-//       }
-
-//    }
-// }
@@ -1,102 +0,0 @@
-using Bts.ArithmeticExpressions;
-
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-
-namespace BCG
-{
-
-   public class BooleanStringReplaceStream : ViewStream, IStreamMapper
-   {
-      private BooleanExpressionFilter _bool;
-      private string _column, _value;
-      private IBlueTableSchema _schema;
-      public BooleanStringReplaceStream(ViewStream vs, string boolean_expression, string column, string value)
-      {
-         _column = column;
-         _value = value;
-         if(!string.IsNullOrEmpty(boolean_expression))
-            _bool = new BooleanExpressionFilter(boolean_expression);
-         mySetRealSource(new MapStream(vs, this));
-      }
-      public IBlueTableSchema getOutputSchema(IBlueTableSchema inputSchema)
-      {
-         _schema = inputSchema;
-         return inputSchema;
-      }
-      public IBlueRow map(IBlueRow row)
-      {
-         MutableBlueRow result = new MutableBlueRow(_schema, row);
-         if(_bool == null || _bool.filter(row))
-            result.setValue(_column, _value);
-         return result;
-      }
-
-   }
-
-   public class MathStream : ViewStream, IStreamMapper
-   {
-      private IArithmeticProgram myExp;
-      private BooleanExpressionFilter _bool;
-      List<string> myExtraColumns = new List<string>();
-      BlueTableSchema mySchema;
-       
-
-      public MathStream(ViewStream vs, string mathExpression)
-         : this(vs, mathExpression, string.Empty)
-      {
-      }
-
-      public MathStream(ViewStream vs, string mathExpression, string boolean_expression)
-      {
-         myExp = ArithmeticProgramParser.Parse(mathExpression) ??
-            throw new Exception($"Failed to parse ArithmeticExpression '{mathExpression}'");
-         myExtraColumns = myExp.OutputIdentifiers.ToList();
-         if(!string.IsNullOrEmpty(boolean_expression))
-            _bool = new BooleanExpressionFilter(boolean_expression);
-         mySetRealSource(new MapStream(vs, this));
-      }
-
-      #region IStreamMapper Members
-
-      public IBlueTableSchema getOutputSchema(IBlueTableSchema inputSchema)
-      {
-         if (mySchema == null)
-         {
-            Dictionary<string, ColumnInfo> colIdx = new Dictionary<string, ColumnInfo>();
-            foreach (ColumnInfo ci in inputSchema.columnInfo)
-               colIdx[ci.colName] = ci;
-
-            foreach (string ncn in myExtraColumns)
-            {
-               ColumnInfo newC;
-               if (colIdx.ContainsKey(ncn))
-                  newC = new ColumnInfo(colIdx[ncn].colName, colIdx[ncn].colNo, typeof(double));
-               else
-                  newC = new ColumnInfo(ncn, colIdx.Count, typeof(double));
-               colIdx[ncn] = newC;
-            }
-            mySchema = new BlueTableSchema(colIdx.Values.ToArray(), "math(" + inputSchema.tableName + ")");
-         }
-         return mySchema;
-      }
-
-      #endregion
-
-      #region IDynamicStreamMapper Members
-
-      public IBlueRow map(IBlueRow row)
-      {
-         MutableBlueRow result = new MutableBlueRow(mySchema, row);
-         if(_bool == null || _bool.filter(row))
-         {
-            myExp.Evaluate(result.AsDictionary());
-         }
-         return result;
-      }
-
-      #endregion
-   }
-}
@@ -1,48 +0,0 @@
-
-// using System;
-// using System.Collections;
-// using System.Collections.Generic;
-// using System.Text.RegularExpressions;
-// using System.ComponentModel;
-
-// using BCG.Utilities;
-
-// namespace BCG {
-
-//    public class RegexMatchAdder : ColumnAdder {
-
-//       private int[] myAddedColNos;
-//       private string mySrcCol;
-//       private Regex myRegex;
-
-//       public RegexMatchAdder (string srcCol, string columnDef, string regex) : base (columnDef) {
-//          mySrcCol = srcCol;
-//          myRegex = new Regex (regex);
-//       }
-
-//       public override IBlueRow map (IBlueRow row) {
-//          MutableBlueRow result = new MutableBlueRow (mySchema, row);
-
-//          if (myAddedColNos == null) {
-//             myAddedColNos = new int[myNewColumns.Count];
-//             for (int i = 0; i < myAddedColNos.Length; ++i)
-//                myAddedColNos[i] = i + row.Count;
-//          }
-
-//          object[] values = new object[myNewColumns.Count];
-//          string src = (string)row[mySrcCol];
-//          // extract the requested regex substrings
-//          Match m = myRegex.Match (src);
-//          for (int icol = 0; icol < myAddedColNos.Length; ++icol) {
-//             int i = icol + row.Count;
-//             Group g = m.Groups[mySchema.columnNames[i]];
-//             object val = TypeDescriptor.GetConverter (mySchema[i].colType)
-//                .ConvertFromString (g.Success ? g.Value: string.Empty);
-//             result.setValue (i, val);
-//          }
-
-//          return result;
-//       }
-
-//    }
-// }
@@ -1,85 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-
-namespace BCG
-{
-   public class XYTranspositionStream : ViewStream
-   {
-      private ViewStream _stream;
-      private IBlueTableSchema _schema;
-      private string[] _transposed_cols;
-
-      public XYTranspositionStream(ViewStream stream, string transposed_cols)
-      {
-         _transposed_cols = transposed_cols.Split(' ');
-         _stream = stream;
-      }
-
-      protected override void myOnFirstSubscriber()
-      {
-         _stream.onChange += _stream_onChange;
-      }
-
-      protected override void myOnLastSubscriber()
-      {
-         if (_stream != null)
-            _stream.onChange -= _stream_onChange;
-      }
-
-      private void _stream_onChange(object newValue)
-      {
-         DataPacket dp = newValue as DataPacket;
-         if (dp != null)
-         {
-            if (_schema == null)
-               _make_schema(dp.schema);
-            BlueTable result = new BlueTable(_schema);
-            int id = 1;
-            foreach (IBlueRow row in dp.newRows)
-            {
-               foreach (string transposed_col in _transposed_cols)
-               {
-                  MutableBlueRow mbr = new MutableBlueRow(_schema);
-                  for (int i = 0; i < _schema.columnNames.Length; i++)
-                  {
-                     if (_schema.columnNames[i] == "id")
-                        mbr.setValue(i, id++);
-                     else if (_schema.columnNames[i] == "param_name")
-                        mbr.setValue(i, transposed_col);
-                     else if (_schema.columnNames[i] == "param_value")
-                        mbr.setValue(i, row[transposed_col]);
-                     else
-                        mbr.setValue(i, row[_schema.columnNames[i]]);
-                  }
-                  result.addRow(mbr);
-               }
-            }
-            myFireEvent(new DataPacket(result, result, myLastValue == null ? new BlueTable(_schema) : (myLastValue as DataPacket).newRows));
-         }
-      }
-
-      private void _make_schema(IBlueTableSchema input_schema)
-      {
-         List<ColumnInfo> info = new List<ColumnInfo>();
-         int col_counter = 0;
-         info.Add(new ColumnInfo("id", col_counter++, typeof(int)));
-         info.Add(new ColumnInfo("param_name", col_counter++, typeof(string)));
-         info.Add(new ColumnInfo("param_value", col_counter++, typeof(object)));
-         foreach (ColumnInfo ci in input_schema.columnInfo)
-            if (!_is_transposing_column(ci.colName) && ci.colName != "id")
-               info.Add(new ColumnInfo(ci.colName, col_counter++, ci.colType));
-         _schema = new BlueTableSchema(info.ToArray(), String.Format("xy_transposed_{0}", input_schema.tableName));
-      }
-
-      private bool _is_transposing_column(string col_name)
-      {
-         foreach (string tc in _transposed_cols)
-            if (col_name == tc)
-               return true;
-         return false;
-      }
-   }
-}
@@ -1,244 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-using mbts;
-
-namespace BCG
-{
-   public class YXTranspositionStream : ViewStream, INonIncGroupByEvaluator
-   {
-      private class OnlyFireOnceStream : ViewStream
-      {
-         private ViewStream _stream;
-         private bool _hooked = false;
-
-         public OnlyFireOnceStream(ViewStream stream)
-         {
-            _stream = stream;
-         }
-
-         protected override void myOnFirstSubscriber()
-         {
-            _stream.onChange += _stream_onChange;
-            _hooked = true;
-         }
-
-         protected override void myOnLastSubscriber()
-         {
-            if (_hooked && _stream != null)
-               _stream.onChange -= _stream_onChange;
-         }
-
-         private void _stream_onChange(object newValue)
-         {
-            DataPacket dp = newValue as DataPacket;
-            if (dp != null && dp.newRows.Count > 0)
-            {
-               _stream.onChange -= _stream_onChange;
-               myFireEvent(new DataPacket(dp.newRows, dp.newRows, new BlueTable(dp.newRows.schema)));
-            }
-         }
-      }
-
-      public delegate void IncrementValues(object[] current_values, object[] values_to_inc);
-      public delegate string GetColumnPrefix(object[] transposing_col_values);
-
-      public delegate string GetColumnSuffix(string col_name);
-      private GetColumnSuffix _get_column_suffix = new GetColumnSuffix((cn) => { return cn; });
-
-      private IncrementValues _increment_values;
-      private GetColumnPrefix _get_column_prefix;
-
-      private IBlueTableSchema _schema;
-
-      private string[] _group_by_cols;
-      private Pair<string, Type>[] _cols_per_transposed;
-      private string[] _transposing_cols;
-
-      private int[] _transposing_col_indices;
-
-      private Comparison<Pair<int, object[]>> _transpsed_col_value_comparer_wrapper;
-
-      public YXTranspositionStream(ViewStream stream, string transposed_cols_group, string cols_per_transposed, string group_by_cols,
-         IncrementValues increment_values_del, GetColumnPrefix get_column_prefix_del, GetColumnSuffix get_column_suffix_del, Comparison<object[]> transposed_col_value_comparer)
-         : this(stream, transposed_cols_group, cols_per_transposed, group_by_cols, increment_values_del,
-                get_column_prefix_del, get_column_suffix_del, transposed_col_value_comparer, true)
-      { }
-
-      public YXTranspositionStream(ViewStream stream, string transposed_cols_group, string cols_per_transposed, string group_by_cols,
-         IncrementValues increment_values_del, GetColumnPrefix get_column_prefix_del, GetColumnSuffix get_column_suffix_del, Comparison<object[]> transposed_col_value_comparer, bool only_fire_once)
-      {
-         if (get_column_suffix_del != null)
-            _get_column_suffix = get_column_suffix_del;
-         if (transposed_col_value_comparer != null)
-         {
-            _transpsed_col_value_comparer_wrapper = new Comparison<Pair<int, object[]>>((p1,p2) =>
-               {
-                  return transposed_col_value_comparer(p1.second, p2.second);
-               });
-         }
-         _group_by_cols = group_by_cols.Split(' ');
-         _transposing_cols = transposed_cols_group.Split(' ');
-         string[] cols = cols_per_transposed.Split(' ');
-         _cols_per_transposed = new Pair<string, Type>[cols.Length];
-         for (int i = 0; i < _cols_per_transposed.Length; i++)
-         {
-            string[] name_type = cols[i].Split('\\');
-            // mbts.Logger.assert(name_type.Length == 2, "Expected cols_per_transposed to be in format name\\type");
-            _cols_per_transposed[i] = new Pair<string, Type>(name_type[0], Type.GetType(name_type[1]));
-         }
-         _increment_values = increment_values_del;
-         _get_column_prefix = get_column_prefix_del;
-         if(only_fire_once)
-            mySetRealSource(new NonIncGroupByStream(new OnlyFireOnceStream(stream), this));
-         else
-            mySetRealSource(new NonIncGroupByStream(stream, this));
-      }
-
-      private void _set_schema(List<string> tc_prefixes, Pair<string, Type>[] group_by_col_info, string table_name)
-      {
-         int col_index = 0;
-         List<ColumnInfo> col_info = new List<ColumnInfo>();
-         col_info.Add(new ColumnInfo("id", col_index++, typeof(int)));
-         foreach (Pair<string, Type> p in group_by_col_info)
-            col_info.Add(new ColumnInfo(p.first, col_index++, p.second));
-         foreach (string tc_prefix in tc_prefixes)
-            foreach (Pair<string, Type> p in _cols_per_transposed)
-               col_info.Add(new ColumnInfo(_get_full_column_name(tc_prefix, p.first), col_index++, p.second));
-         IBlueTableSchema schema = new BlueTableSchema(col_info.ToArray(), "xy_transposed_" + table_name);
-         if (_schema == null)
-            _schema = schema;
-      }
-
-      private string _get_full_column_name(string prefix, string col_name)
-      {
-         string suffix = _get_column_suffix(col_name);
-         if (suffix == string.Empty)
-            return prefix;
-         else
-            return prefix + "_" + suffix;
-      }
-
-      #region INonIncGroupByEvaluator Members
-
-      public string[] get_group_by_cols()
-      {
-         return _group_by_cols;
-      }
-
-      public IBlueRowCollection evaluate(IDictionary<int, List<IBlueRow>> grouped_rows)
-      {
-         Dictionary<int, Dictionary<int, object[]>> all_tc_infos_and_values = new Dictionary<int, Dictionary<int, object[]>>();
-         Dictionary<int, object[]> group_by_cols_value_dict = new Dictionary<int, object[]>();
-         BlueRowHasher hasher = new BlueRowHasher(_transposing_cols.Length);
-         Pair<string, Type>[] group_by_col_info = new Pair<string, Type>[_group_by_cols.Length];
-         string table_name = string.Empty;
-         if (grouped_rows.Count > 0)
-         {
-            IBlueTableSchema schema = null;
-            foreach (KeyValuePair<int, List<IBlueRow>> kvp in grouped_rows)
-            {
-               schema = kvp.Value[0].schema;
-               break;
-            }
-            table_name = schema.tableName;
-            _transposing_col_indices = BlueDataUtility.get_column_indices(schema, _transposing_cols);
-            int[] group_by_indices = BlueDataUtility.get_column_indices(schema, _group_by_cols);
-            for (int i = 0; i < group_by_indices.Length; i++)
-            {
-               ColumnInfo ci = schema.columnInfo[group_by_indices[i]];
-               group_by_col_info[i] = new Pair<string, Type>(ci.colName, ci.colType);
-            }
-         }
-         else
-            return new BlueTable(new BlueTableSchema(new ColumnInfo[] { new ColumnInfo("id", 0, typeof(int)) }, table_name)); 
-         Dictionary<int, string> tc_prefixes = new Dictionary<int, string>();
-         List<Pair<int, object[]>> tc_values = new List<Pair<int, object[]>>();
-         foreach (KeyValuePair<int, List<IBlueRow>> kvp in grouped_rows)
-         {
-            //Dictionary of trans_col_group_hash -> pair: first=trans_col_group_values second=per_transposing_col_values 
-            Dictionary<int, object[]> incrementing_values = new Dictionary<int, object[]>();
-            foreach (IBlueRow r in kvp.Value)
-            {
-               int hash = hasher.get_hash(r, _transposing_col_indices);
-               object[] values;
-               if (!incrementing_values.TryGetValue(hash, out values))
-               {
-                  incrementing_values.Add(hash, _get_per_transposing_col_values(r));
-                  string prefix = _get_column_prefix(_get_transposing_col_values(r));
-                  if (!tc_prefixes.ContainsKey(hash))
-                  {
-                     tc_prefixes.Add(hash, prefix);
-                     tc_values.Add(new Pair<int,object[]>(hash, _get_transposing_col_values(r)));
-                  }
-               }
-               else
-                  _increment_values(values, _get_per_transposing_col_values(r));
-            }
-            all_tc_infos_and_values.Add(kvp.Key, incrementing_values);
-            //An ugly way to extract group information needed to insert values later
-            foreach (IBlueRow r in kvp.Value)
-            {
-               group_by_cols_value_dict.Add(kvp.Key, _get_group_by_cols_values(r));
-               break;
-            }
-         }
-         //Sort the transposed schema
-         if (_transpsed_col_value_comparer_wrapper != null)
-            tc_values.Sort(_transpsed_col_value_comparer_wrapper);
-         List<string> prefixes = new List<string>();
-         foreach (Pair<int, object[]> p in tc_values)
-            prefixes.Add(tc_prefixes[p.first]);
-         _set_schema(prefixes, group_by_col_info, table_name);
-         BlueTable result = new BlueTable(_schema);
-         int id = 1;
-         foreach (KeyValuePair<int, Dictionary<int, object[]>> kvp in all_tc_infos_and_values)
-         {
-            MutableBlueRow mbr = new MutableBlueRow(_schema);
-            mbr.setValue("id", id++);
-            for (int i = 0; i < _group_by_cols.Length; i++)
-               mbr.setValue(_group_by_cols[i], group_by_cols_value_dict[kvp.Key][i]);
-            foreach (KeyValuePair<int, object[]> tc_cols in kvp.Value)
-            {
-               string prefix = tc_prefixes[tc_cols.Key];
-               for (int i = 0; i < _cols_per_transposed.Length; i++)
-               {
-                  string column = _get_full_column_name(prefix, _cols_per_transposed[i].first);
-                  if(mbr.schema.columnNames.Contains(column))
-                     mbr.setValue(column, tc_cols.Value[i]);
-               }
-            }
-            result.addRow(mbr);
-         }
-         return result;
-      }
-
-      #endregion
-
-      private object[] _get_transposing_col_values(IBlueRow row)
-      {
-         object[] values = new object[_transposing_cols.Length];
-         for (int i = 0; i < _transposing_cols.Length; i++)
-            values[i] = row[_transposing_cols[i]];
-         return values;
-      }
-
-      private object[] _get_per_transposing_col_values(IBlueRow row)
-      {
-         object[] values = new object[_cols_per_transposed.Length];
-         for (int i = 0; i < _cols_per_transposed.Length; i++)
-            values[i] = row[_cols_per_transposed[i].first];
-         return values;
-      }
-
-      private object[] _get_group_by_cols_values(IBlueRow row)
-      {
-         object[] values = new object[_group_by_cols.Length];
-         for (int i = 0; i < values.Length; i++)
-            values[i] = row[_group_by_cols[i]];
-         return values;
-      }
-   }
-}
@@ -1,22 +0,0 @@
-// using System;
-// using BCG;
-// using BCG.Utilities;
-
-// namespace BCG
-// {
-//    public class CartesianProductStream : ViewStream
-//    {
-//       public CartesianProductStream(ViewStream v1, ViewStream v2)
-//       {
-//          mySetRealSource(
-//          new JoinStream (new AddColumnsStream (v1,
-//             "hiddenCartesianColumn=1"),
-//             "hiddenCartesianColumn",
-//             "!id hiddenCartesianColumn dateTime:dateBoundary",
-//             new AddColumnsStream (v2,
-//             "hiddenCartesianColumn=1"),
-//             "hiddenCartesianColumn",
-//             "!id hiddenCartesianColumn"));
-//       }
-//    }
-// }
@@ -1,55 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-
-namespace BCG
-{
-   public class CaseChangeStream : ViewStream, IStreamMapper
-   {
-
-      private string[] myCaseChangingColumns;
-      bool myIsUpperCase;
-
-      public CaseChangeStream(ViewStream input, bool toUpper, params string[] columnsToChangeCase)
-      {
-         myCaseChangingColumns = columnsToChangeCase;         
-         mySetRealSource(new SuperMapStream(input, this));
-         myIsUpperCase = toUpper;
-      }
-
-
-
-
-      #region IStreamMapper Members
-
-      public IBlueTableSchema getOutputSchema(IBlueTableSchema inputSchema)
-      {
-         return inputSchema;
-      }
-
-      #endregion
-
-      #region IDynamicStreamMapper Members
-
-      public IBlueRow map(IBlueRow row)
-      {
-         object[] outValues = new object[row.Count];
-
-         row.CopyTo(outValues,0);
-
-         foreach (string colName in myCaseChangingColumns)
-         {
-            ColumnInfo thisCol = row.schema[colName];
-            object rowVal = outValues[thisCol.colNo];
-
-            if (rowVal is string && !string.IsNullOrEmpty((string)rowVal))
-               outValues[thisCol.colNo] = myIsUpperCase ? ((string)rowVal).ToUpper() : ((string)rowVal).ToLower();
-         }
-
-         return new BlueRow(row.schema, outValues);
-      }
-
-      #endregion
-   }
-}
@@ -1,13 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-
-namespace BCG
-{
-   public class ToLowerStream : CaseChangeStream
-   {
-      public ToLowerStream(ViewStream input, params string[] colNames)
-         : base(input, false, colNames) { }
-   }
-}
@@ -1,13 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-
-namespace BCG
-{
-   public class ToUpperStream : CaseChangeStream
-   {
-      public ToUpperStream(ViewStream input, params string[] colNames)
-         : base(input, true, colNames) { }
-   }
-}
@@ -1,135 +0,0 @@
-using System;
-using System.Collections;
-using System.Text;
-
-using BCG;
-using BCG.Utilities;
-
-namespace BCG
-{
-   public class ConcatenateColumnsMapper : IStreamMapper
-   {
-      protected IDictionary myTempColMap = new SortedList ();
-      protected ArrayList myColMap;
-      protected BlueTableSchema mySchema;
-
-      public ConcatenateColumnsMapper(params string [] columnDefs)
-      {
-         foreach (string cd in columnDefs)
-         {
-            string outColumn = 
-               cd.Substring(0,cd.IndexOf(":"));
-
-            string [] inColumns =
-               cd.Substring(cd.IndexOf(":") + 1).Split(' ');
-
-            string [] trimedIn = new string[inColumns.Length];
-            int n = 0;
-            foreach (string s in inColumns)
-               trimedIn[n++] = s.Trim();
-
-            myTempColMap[outColumn.Trim()] = trimedIn;
-         }
-      }
-      #region IStreamMapper Members
-
-      public IBlueTableSchema getOutputSchema (IBlueTableSchema inputSchema)
-      {
-         if (mySchema == null) 
-         {
-            /*
-             * The new columns form the first columns, and the existing columns in the input
-             * schema are appened.
-             * */
-            ArrayList cis = new ArrayList ();
-            foreach (string cn in myTempColMap.Keys) 
-               cis.Add (new ColumnInfo (cn, cis.Count, typeof(string)));
-            foreach (ColumnInfo ci in inputSchema.columnInfo)
-               cis.Add (new ColumnInfo (ci.colName, cis.Count, ci.colType));
-            mySchema = new BlueTableSchema("ConcatenateColumns " + inputSchema.tableName,
-               cis.ToArray (typeof(ColumnInfo)) as ColumnInfo[]);
-            /*
-             * An arraylist is formed which indexes the new columns to the existing ones that form it. Hashtables
-             * are avoided wherever possible (which is natural as well, as the keys are ordered integers)
-             * */
-            myColMap = new ArrayList (myTempColMap.Count);
-            foreach (DictionaryEntry de in myTempColMap)
-            {
-               string[] cols = de.Value as string[];
-               ArrayList temp = new ArrayList ();
-               foreach (string col in cols)
-                  temp.Add (inputSchema[col].colNo);
-               myColMap.Add (temp.ToArray(typeof(int)) as int[]);
-            }
-            myTempColMap.Clear ();
-         }
-         return mySchema;
-      }
-
-      #endregion
-
-      #region IDynamicStreamMapper Members
-
-      public virtual IBlueRow map (IBlueRow row)
-      {
-         object[] retVal = new object[mySchema.columnInfo.Length];
-         row.CopyTo (retVal, myColMap.Count);
-         for (int colNo = 0; colNo < myColMap.Count; colNo ++)
-            retVal[colNo] = myGetConcatValue (row, colNo);
-         return new BlueRow (mySchema, retVal);
-      }
-
-      #endregion
-
-      /// <summary>
-      /// Given a row and a column number, the method extracts the constituent columns indices
-      /// (from the colMap array) and form the resultant value corresponding to colNo and the row passed
-      /// </summary>
-      /// <param name="row"></param>
-      /// <param name="colNo"></param>
-      /// <returns></returns>
-      protected virtual object myGetConcatValue (IBlueRow row, int colNo)
-      {
-         StringBuilder b = new StringBuilder();
-         foreach (int cn in myColMap[colNo] as int[])
-            b.Append(row[cn].ToString());
-         return b.ToString ();
-      }
-   }
-
-   public class ConcatenateColumnsMapperForSameDataSet : ConcatenateColumnsMapper 
-   {
-      private HashTableND[] myDicts;
-
-      public ConcatenateColumnsMapperForSameDataSet (params string [] columnDefs)
-         : base (columnDefs)
-      {
-         myDicts = new HashTableND [columnDefs.Length];
-         int i = 0;
-         foreach (DictionaryEntry de in myTempColMap)
-            myDicts[i++] = new HashTableND ((de.Value as string[]).Length);
-      }
-
-      protected override object myGetConcatValue (IBlueRow row, int colNo)
-      {
-         int[] cols = myColMap[colNo] as int[];
-         object[] vals = new object[cols.Length];
-         for (int i = 0; i < vals.Length; i++)
-            vals[i] = row[cols[i]];
-         HashTableND ht = myDicts[colNo];
-         object rv = ht.getValue (vals);
-         if (rv != null)
-            return rv;
-         else
-         {
-            rv = base.myGetConcatValue (row, colNo);
-            object[] args = new object[vals.Length + 1];
-            vals.CopyTo (args, 0);
-            args[args.Length-1] = rv;
-            ht.add (args);
-            return rv;
-         }
-      }
-
-   }
-}
@@ -1,42 +0,0 @@
-using System;
-using BCG;
-using BCG.Utilities;
-
-namespace BCG
-{
-   public class ConcatenateColumnsStream : ViewStream
-   {
-      // Concatenates the string representation of some of the fields
-      // in the input stream
-      // use the following syntax for the columnDef
-      // a:b c d
-      // where a is the name of the output column and b, c, and d are
-      // names of input colums to be concatenated
-      public ConcatenateColumnsStream(
-         ViewStream sourceStream,
-         params string [] columnDefs)
-         : this (sourceStream, true, columnDefs)
-      {}
-
-     
-
-      /// <summary>
-      /// 
-      /// </summary>
-      /// <param name="sourceStream"></param>
-      /// <param name="isConcatenatedDataConfined">true when the data being appended does not change often</param>
-      /// <param name="columnDefs"></param>
-      public ConcatenateColumnsStream (ViewStream sourceStream,
-                                       bool isConcatenatedDataConfined,
-                                       params string[] columnDefs)
-         
-      {
-         mySetRealSource (
-            new MapStream (sourceStream, 
-                           isConcatenatedDataConfined ? new ConcatenateColumnsMapperForSameDataSet (columnDefs) :
-                                                         new ConcatenateColumnsMapper (columnDefs)
-                        )
-         );
-      }
-   }
-}
@@ -1,55 +0,0 @@
-using System;
-
-namespace BCG
-{
-   [DataStreamUserRespresentation ("count")]
-	public class CountStream : ViewStream
-	{
-      private DataPacket myLastFiredDataPacket;
-      private IBlueTableSchema mySchema = new BlueTableSchema ("count", 
-         new ColumnInfo ("id", 0, typeof(int)),
-         new ColumnInfo ("count", 1, typeof(int)));
-      private int myId = 0;
-      private ViewStream myVS;
-
-      public CountStream (ViewStream vs)
-      {
-         myVS = vs;
-      }
-
-      public CountStream (string tableName)
-         : this (new TableStream (tableName))
-      {}
-
-      protected override void myOnFirstSubscriber () {
-         myVS.onChange += new ChangeDelegate(myHandleChanges);
-      }
-      protected override void myOnLastSubscriber () {
-         myVS.onChange -= new ChangeDelegate(myHandleChanges);
-      }
-
-
-      private void myHandleChanges(object newValue)
-      {
-         myFireEvent (
-            myLastFiredDataPacket =
-               myLastFiredDataPacket == null ?
-                  new DataPacket (myGetRows (newValue, ++myId), myGetRows (newValue, myId), 
-                  new BlueTable (mySchema))
-                  :
-                  new DataPacket (myGetRows (newValue, ++myId), myGetRows (newValue, myId), 
-                  myLastFiredDataPacket.newRows)
-            );
-      }
-
-      private IBlueRowCollection myGetRows (object dp, int id)
-      {
-         BlueTable retVal = new BlueTable (mySchema);
-         retVal.addRow
-            (new BlueRow (mySchema, id, (dp as DataPacket).newRows.Count));
-         return retVal;
-      }
-
-
-   }
-}
@@ -1,48 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-
-namespace BCG
-{
-    public class AverageCollectorStream : ViewStream, ITableCrusher
-    {
-        public AverageCollectorStream(ViewStream stream, params string[] columnsToAverage)
-        {        
-            myAveragingColumns = columnsToAverage;
-            mySetRealSource(new CrushingCollectorStream(stream, this));
-        }
-        
-        private string[] myAveragingColumns;
-
-        #region ITableCrusher Members
-        public IBlueRow crush(IBlueRowCollection rows, int idToUse)
-        {
-            IDictionary<string, double> columnSums = new Dictionary<string, double>();
-
-            IBlueRow resultRow = null;
-            foreach (IBlueRow row in rows)
-            {
-                resultRow = row;
-
-                foreach (string colName in myAveragingColumns)
-                {
-                    double sum = 0.0f;
-                    columnSums.TryGetValue(colName, out sum);
-                    sum += (double) row[colName];
-                    columnSums[colName] = sum;
-                }
-            }
-
-            object[] resultValues = new object[rows.schema.columnNames.Length];
-            
-            if (resultRow != null)
-                resultRow.CopyTo(resultValues, 0);
-
-            resultValues[rows.schema["id"].colNo] = idToUse;
-            resultRow = new BlueRow(rows.schema, resultValues);            
-            return resultRow;
-        }
-        #endregion
-    }
-}
@@ -1,61 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-
-namespace BCG
-{
-    public class CrushingCollectorStream : ViewStream
-    {
-        
-        /*      Arguments: a single
-         * Every time one of input the streams updates, it is crushed down to a single row,
-         * and added to the collection of output rows.  
-         * 
-         * The column 'tableIdentifierColumnName' is added to the schema, and each row from the viewstream
-         * is put into the 
-         * 
-         * */
-        public CrushingCollectorStream(ViewStream toCrush, ITableCrusher crusher)
-        {
-            myToCrush = toCrush;
-            myRows = new List<IBlueRow>();
-            myCrusher = crusher;
-        }
-
-        private ViewStream myToCrush;
-        private List<IBlueRow> myRows;
-        private ITableCrusher myCrusher;
-        private int myNextId = 0;
-
-        protected override void myOnFirstSubscriber()
-        {
-            myToCrush.onChange += new ChangeDelegate(myToCrush_onChange);
-        }
-
-        protected override void myOnLastSubscriber()
-        {
-            myToCrush.onChange -= myToCrush_onChange;
-        }
-
-        void myToCrush_onChange(object newValue)
-        {
-            DataPacket dp = (DataPacket)newValue;
-
-            IBlueRow crushed = myCrusher.crush(dp.newRows, myNextId++);
-
-            BlueTable newRows = new BlueTable(dp.schema);
-            newRows.addRows(myRows);
-            newRows.addRow(crushed);
-            myRows.Add(crushed);
-
-            BlueTable added = new BlueTable(dp.schema);
-            added.addRow(crushed);
-
-            myFireEvent(new DataPacket(newRows, added, new BlueTable(dp.schema)));
-
-        }
-
-        
-    }
-}
@@ -1,61 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-
-namespace BCG
-{
-    public class CrushingStream : ViewStream
-    {
-        public CrushingStream(ITableCrusher crusher, params ViewStream[] streamsToCrush)
-        {
-            myToCrush = streamsToCrush;
-            myCrusher = crusher;
-            myOldRows = new IBlueRow[myToCrush.Length];
-            
-            //set up an anonymous delegate for each of the streams
-            //we do this so that we can unsubscribe
-            myDelegates = new ChangeDelegate[myToCrush.Length];
-            for (int i = 0; i < myToCrush.Length; ++i)
-            {
-                int tempI = i;
-                myDelegates[tempI] = new ChangeDelegate((o) => { myHandleChange(tempI, ((DataPacket)o).newRows); });
-            }
-        }
-
-        private IBlueRow[] myOldRows;
-        private ViewStream[] myToCrush;
-        private ITableCrusher myCrusher;
-
-        private ChangeDelegate[] myDelegates;
-
-        protected override void myOnFirstSubscriber()
-        {
-            for (int i = 0; i < myToCrush.Length; ++ i)
-                myToCrush[i].onChange += myDelegates[i];
-        }
-        protected override void myOnLastSubscriber()
-        {
-            for (int i = 0; i < myToCrush.Length; ++i)
-                myToCrush[i].onChange -= myDelegates[i];
-        }
-
-        protected virtual void myHandleChange(int streamIndex, IBlueRowCollection newRows)
-        {
-            IBlueRow oldRow = myOldRows[streamIndex];
-
-            IBlueRow newRow = myCrusher.crush(newRows, streamIndex);
-            myOldRows[streamIndex] = newRow;
-
-            BlueTable newState = new BlueTable(newRows.schema);
-            newState.addRows(myOldRows);
-            BlueTable addedRows = new BlueTable(newRows.schema);
-            addedRows.addRow(newRow);
-            BlueTable removedRows = new BlueTable(newRows.schema);
-            removedRows.addRow(oldRow);
-
-            myFireEvent(new DataPacket(newState, addedRows, removedRows));
-            
-        }
-    }
-}
@@ -1,12 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-
-namespace BCG
-{
-    public interface ITableCrusher
-    {
-        IBlueRow crush(IBlueRowCollection rows, int idToUse);
-    }
-}
Author	SHA1	Message	Date
John Colvin	c5b79b3dae	chore: Define common IUniqueID member impls in interface Taking advantage of nifty new language feats	2023-08-22 11:35:41 -04:00
John Colvin	5180d13fb0	build (refactor): Organize py classes a bit	2023-08-22 11:35:41 -04:00
John Colvin	4065b8b4c4	dev: Simplify sparkd build instructions Restructure in style similar to Spark and Api Server build instructions	2023-08-22 11:35:41 -04:00
John Colvin	a28070713e	dev: Add instructions to build spark in README	2023-08-22 11:35:41 -04:00
John Colvin	83cf96d254	build: Replace build_api_server.py w/ cmake/dotnet clis Add instructions to build the Api Server in README	2023-08-22 11:35:41 -04:00
John Colvin	56b3eb60d5	build: Remove 'jobs' arg from CMake build presets Modern CMake uses an appropriate number of jobs by default (I believe the number of cores on the cpu)	2023-08-22 01:29:45 -04:00
John Colvin	c30e09a6eb	build: Init SPARK_ENABLE_API_SERVER reguardless of platform	2023-08-22 01:29:45 -04:00
John Colvin	be96cbb57d	build: Only build Admin Web App on Linux	2023-08-22 01:29:45 -04:00
John Colvin	d26b818939	build: Copy libspark to dotnet bin dirs in CMakeLists	2023-08-22 01:29:45 -04:00