find_end.hpp

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// SPDX-License-Identifier: BSL-1.0
 
#ifndef TETL_ALGORITHM_FIND_END_HPP
#define TETL_ALGORITHM_FIND_END_HPP
 
#include <etl/_algorithm/search.hpp>
#include <etl/_functional/equal_to.hpp>
 
namespace etl {

template <typename ForwardIt1, typename ForwardIt2, typename Predicate>
[[nodiscard]] constexpr auto
find_end(ForwardIt1 first, ForwardIt1 last, ForwardIt2 sFirst, ForwardIt2 sLast, Predicate p) -> ForwardIt1
{
    if (sFirst == sLast) {
        return last;
    }
    auto result = last;
    while (true) {
        auto newResult = etl::search(first, last, sFirst, sLast, p);
        if (newResult == last) {
            break;
        }
        result = newResult;
        first  = result;
        ++first;
    }
    return result;
}

template <typename ForwardIt1, typename ForwardIt2>
[[nodiscard]] constexpr auto find_end(ForwardIt1 first, ForwardIt1 last, ForwardIt2 sFirst, ForwardIt2 sLast)
    -> ForwardIt1
{
    return etl::find_end(first, last, sFirst, sLast, etl::equal_to());
}
 
} // namespace etl
 
#endif // TETL_ALGORITHM_FIND_END_HPP