81 lines
2.4 KiB
C++
81 lines
2.4 KiB
C++
/// \file
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// Range v3 library
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//
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// Copyright Eric Niebler 2014-present
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//
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// Use, modification and distribution is subject to the
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// Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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//
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// Project home: https://github.com/ericniebler/range-v3
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//
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#ifndef RANGES_V3_ALGORITHM_FOR_EACH_HPP
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#define RANGES_V3_ALGORITHM_FOR_EACH_HPP
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#include <functional>
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#include <range/v3/range_fwd.hpp>
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#include <range/v3/algorithm/result_types.hpp>
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#include <range/v3/functional/identity.hpp>
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#include <range/v3/functional/invoke.hpp>
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#include <range/v3/functional/reference_wrapper.hpp>
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#include <range/v3/iterator/traits.hpp>
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#include <range/v3/range/access.hpp>
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#include <range/v3/range/concepts.hpp>
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#include <range/v3/range/dangling.hpp>
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#include <range/v3/range/traits.hpp>
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#include <range/v3/utility/static_const.hpp>
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#include <range/v3/detail/prologue.hpp>
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namespace ranges
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{
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/// \addtogroup group-algorithms
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/// @{
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template<typename I, typename F>
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using for_each_result = detail::in_fun_result<I, F>;
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RANGES_FUNC_BEGIN(for_each)
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/// \brief function template \c for_each
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template(typename I, typename S, typename F, typename P = identity)(
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/// \pre
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requires input_iterator<I> AND sentinel_for<S, I> AND
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indirectly_unary_invocable<F, projected<I, P>>)
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for_each_result<I, F> RANGES_FUNC(for_each)(I first, S last, F fun, P proj = P{})
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{
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for(; first != last; ++first)
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{
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invoke(fun, invoke(proj, *first));
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}
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return {detail::move(first), detail::move(fun)};
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}
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/// \overload
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template(typename Rng, typename F, typename P = identity)(
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/// \pre
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requires input_range<Rng> AND
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indirectly_unary_invocable<F, projected<iterator_t<Rng>, P>>)
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for_each_result<borrowed_iterator_t<Rng>, F> //
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RANGES_FUNC(for_each)(Rng && rng, F fun, P proj = P{})
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{
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return {(*this)(begin(rng), end(rng), ref(fun), detail::move(proj)).in,
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detail::move(fun)};
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}
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RANGES_FUNC_END(for_each)
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namespace cpp20
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{
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using ranges::for_each;
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using ranges::for_each_result;
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} // namespace cpp20
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/// @}
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} // namespace ranges
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#include <range/v3/detail/epilogue.hpp>
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#endif
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