prev.hpp

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// SPDX-License-Identifier: BSL-1.0
// SPDX-FileCopyrightText: Copyright (C) 2019 Tobias Hienzsch
 
#ifndef TETL_ITERATOR_PREV_HPP
#define TETL_ITERATOR_PREV_HPP
 
#include <etl/_iterator/advance.hpp>
#include <etl/_iterator/iterator_traits.hpp>
 
namespace etl {
 
/// Return the nth predecessor of iterator it.
/// \ingroup iterator
template <typename BidirIt>
[[nodiscard]] constexpr auto prev(BidirIt it, typename iterator_traits<BidirIt>::difference_type n = 1) -> BidirIt
{
    etl::advance(it, -n);
    return it;
}
} // namespace etl
 
#endif // TETL_ITERATOR_PREV_HPP