76 lines
1.8 KiB
C++
76 lines
1.8 KiB
C++
//
|
|
// Copyright Eric Niebler 2014-present
|
|
//
|
|
// Use, modification and distribution is subject to the
|
|
// Boost Software License, Version 1.0. (See accompanying
|
|
// file LICENSE_1_0.txt or copy at
|
|
// http://www.boost.org/LICENSE_1_0.txt)
|
|
//
|
|
// Project home: https://github.com/ericniebler/range-v3
|
|
//
|
|
|
|
#ifndef RANGES_V3_VIEW_UNBOUNDED_HPP
|
|
#define RANGES_V3_VIEW_UNBOUNDED_HPP
|
|
|
|
#include <range/v3/range_fwd.hpp>
|
|
|
|
#include <range/v3/iterator/unreachable_sentinel.hpp>
|
|
#include <range/v3/utility/static_const.hpp>
|
|
#include <range/v3/view/interface.hpp>
|
|
|
|
#include <range/v3/detail/prologue.hpp>
|
|
|
|
namespace ranges
|
|
{
|
|
/// \addtogroup group-views
|
|
/// @{
|
|
template<typename I>
|
|
struct unbounded_view : view_interface<unbounded_view<I>, infinite>
|
|
{
|
|
private:
|
|
I it_;
|
|
|
|
public:
|
|
unbounded_view() = default;
|
|
constexpr explicit unbounded_view(I it)
|
|
: it_(detail::move(it))
|
|
{}
|
|
constexpr I begin() const
|
|
{
|
|
return it_;
|
|
}
|
|
constexpr unreachable_sentinel_t end() const
|
|
{
|
|
return {};
|
|
}
|
|
};
|
|
|
|
template<typename I>
|
|
RANGES_INLINE_VAR constexpr bool enable_borrowed_range<unbounded_view<I>> = true;
|
|
|
|
namespace views
|
|
{
|
|
struct unbounded_fn
|
|
{
|
|
template(typename I)(
|
|
/// \pre
|
|
requires input_iterator<I>)
|
|
constexpr unbounded_view<I> operator()(I it) const
|
|
{
|
|
return unbounded_view<I>{detail::move(it)};
|
|
}
|
|
};
|
|
|
|
/// \relates unbounded_fn
|
|
/// \ingroup group-views
|
|
RANGES_INLINE_VARIABLE(unbounded_fn, unbounded)
|
|
} // namespace views
|
|
/// @}
|
|
} // namespace ranges
|
|
|
|
#include <range/v3/detail/epilogue.hpp>
|
|
#include <range/v3/detail/satisfy_boost_range.hpp>
|
|
RANGES_SATISFY_BOOST_RANGE(::ranges::unbounded_view)
|
|
|
|
#endif
|