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75 lines
1.8 KiB
C++
75 lines
1.8 KiB
C++
//
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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_VIEW_UNBOUNDED_HPP
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#define RANGES_V3_VIEW_UNBOUNDED_HPP
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#include <range/v3/range_fwd.hpp>
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#include <range/v3/iterator/unreachable_sentinel.hpp>
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#include <range/v3/utility/static_const.hpp>
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#include <range/v3/view/interface.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-views
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/// @{
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template<typename I>
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struct unbounded_view : view_interface<unbounded_view<I>, infinite>
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{
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private:
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I it_;
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public:
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unbounded_view() = default;
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constexpr explicit unbounded_view(I it)
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: it_(detail::move(it))
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{}
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constexpr I begin() const
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{
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return it_;
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}
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constexpr unreachable_sentinel_t end() const
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{
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return {};
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}
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};
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template<typename I>
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RANGES_INLINE_VAR constexpr bool enable_borrowed_range<unbounded_view<I>> = true;
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namespace views
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{
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struct unbounded_fn
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{
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template(typename I)(
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requires input_iterator<I>)
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constexpr unbounded_view<I> operator()(I it) const
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{
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return unbounded_view<I>{detail::move(it)};
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}
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};
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/// \relates unbounded_fn
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/// \ingroup group-views
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RANGES_INLINE_VARIABLE(unbounded_fn, unbounded)
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} // namespace views
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/// @}
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} // namespace ranges
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#include <range/v3/detail/epilogue.hpp>
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#include <range/v3/detail/satisfy_boost_range.hpp>
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RANGES_SATISFY_BOOST_RANGE(::ranges::unbounded_view)
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#endif
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