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/// \file
// Range v3 library
//
// Copyright Johel Guerrero 2019
//
// 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_ALGORITHM_ENDS_WITH_HPP
#define RANGES_V3_ALGORITHM_ENDS_WITH_HPP
#include <utility>
#include <concepts/concepts.hpp>
#include <range/v3/algorithm/equal.hpp>
#include <range/v3/detail/config.hpp>
#include <range/v3/functional/comparisons.hpp>
#include <range/v3/functional/identity.hpp>
#include <range/v3/iterator/concepts.hpp>
#include <range/v3/iterator/operations.hpp>
#include <range/v3/range/access.hpp>
#include <range/v3/range/concepts.hpp>
#include <range/v3/detail/disable_warnings.hpp>
namespace ranges
{
/// \addtogroup group-algorithms
/// @{
RANGES_FUNC_BEGIN(ends_with)
/// \brief function template \c ends_with
template<typename I0,
typename S0,
typename I1,
typename S1,
typename C = equal_to,
typename P0 = identity,
typename P1 = identity>
constexpr auto RANGES_FUNC(ends_with)(I0 begin0,
S0 end0,
I1 begin1,
S1 end1,
C pred = C{},
P0 proj0 = P0{},
P1 proj1 = P1{}) //
->CPP_ret(bool)( //
requires((forward_iterator<I0> && sentinel_for<S0, I0>) ||
(input_iterator<I0> && sized_sentinel_for<S0, I0>)) &&
((forward_iterator<I1> && sentinel_for<S1, I1>) ||
(input_iterator<I1> && sized_sentinel_for<S1, I1>)) &&
indirectly_comparable<I0, I1, C, P0, P1>)
{
const auto drop = distance(begin0, end0) - distance(begin1, end1);
if(drop < 0)
return false;
return equal(next(std::move(begin0), drop),
std::move(end0),
std::move(begin1),
std::move(end1),
std::move(pred),
std::move(proj0),
std::move(proj1));
}
/// \overload
template<typename Rng0,
typename Rng1,
typename C = equal_to,
typename P0 = identity,
typename P1 = identity>
constexpr auto RANGES_FUNC(ends_with)(
Rng0 && rng0, Rng1 && rng1, C pred = C{}, P0 proj0 = P0{}, P1 proj1 = P1{}) //
->CPP_ret(bool)( //
requires(forward_range<Rng0> ||
(input_range<Rng0> && sized_range<Rng0>)) &&
(forward_range<Rng1> || (input_range<Rng1> && sized_range<Rng1>)) &&
indirectly_comparable<iterator_t<Rng0>, iterator_t<Rng1>, C, P0, P1>)
{
const auto drop = distance(rng0) - distance(rng1);
if(drop < 0)
return false;
return equal(next(begin(rng0), drop),
end(rng0),
begin(rng1),
end(rng1),
std::move(pred),
std::move(proj0),
std::move(proj1));
}
RANGES_FUNC_END(ends_with)
/// @}
} // namespace ranges
#include <range/v3/detail/reenable_warnings.hpp>
#endif
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