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61 lines
1.8 KiB
C++
61 lines
1.8 KiB
C++
/// \file
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// Range v3 library
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//
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// Copyright Johel Guerrero 2019
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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_CONTAINS_HPP
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#define RANGES_V3_ALGORITHM_CONTAINS_HPP
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#include <utility>
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#include <concepts/concepts.hpp>
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#include <range/v3/algorithm/find.hpp>
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#include <range/v3/detail/config.hpp>
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#include <range/v3/functional/comparisons.hpp>
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#include <range/v3/functional/identity.hpp>
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#include <range/v3/iterator/concepts.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/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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RANGES_FUNC_BEGIN(contains)
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/// \brief function template \c contains
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template(typename I, typename S, typename T, typename P = identity)(
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requires input_iterator<I> AND sentinel_for<S, I> AND
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indirect_relation<equal_to, projected<I, P>, const T *>)
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constexpr bool RANGES_FUNC(contains)(I first, S last, const T & val, P proj = {})
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{
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return find(std::move(first), last, val, std::move(proj)) != last;
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}
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/// \overload
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template(typename Rng, typename T, typename P = identity)(
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requires input_range<Rng> AND
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indirect_relation<equal_to, projected<iterator_t<Rng>, P>, const T *>)
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constexpr bool RANGES_FUNC(contains)(Rng && rng, const T & val, P proj = {})
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{
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return (*this)(begin(rng), end(rng), val, std::move(proj));
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}
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RANGES_FUNC_END(contains)
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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 // RANGES_V3_ALGORITHM_CONTAINS_HPP
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