adjacent_find.hpp

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

template <typename ForwardIt, typename Predicate>
[[nodiscard]] constexpr auto adjacent_find(ForwardIt first, ForwardIt last, Predicate pred) -> ForwardIt
{
    if (first == last) {
        return last;
    }
 
    auto next = first;
    ++next;
 
    for (; next != last; ++next, (void)++first) {
        if (pred(*first, *next)) {
            return first;
        }
    }
 
    return last;
}
 
template <typename ForwardIt>
[[nodiscard]] constexpr auto adjacent_find(ForwardIt first, ForwardIt last) -> ForwardIt
{
    return etl::adjacent_find(first, last, etl::equal_to());
}

 
} // namespace etl
 
#endif // TETL_ALGORITHM_ADJACENT_FIND_HPP