legacy_bidirectional_iterator.hpp

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// SPDX-License-Identifier: BSL-1.0
// SPDX-FileCopyrightText: Copyright (C) 2024 Tobias Hienzsch
 
#ifndef TETL_CONCEPTS_LEGACY_BIDIRECTIONAL_ITERATOR_HPP
#define TETL_CONCEPTS_LEGACY_BIDIRECTIONAL_ITERATOR_HPP
 
#include <etl/_concepts/convertible_to.hpp>
#include <etl/_concepts/same_as.hpp>
#include <etl/_iterator/iter_reference_t.hpp>
#include <etl/_iterator/legacy_forward_iterator.hpp>
 
namespace etl {
 
/// \note Non-standard extension
/// \headerfile etl/iterator.hpp
/// \ingroup iterator
template <typename Iter>
concept legacy_bidirectional_iterator = etl::legacy_forward_iterator<Iter> and requires(Iter i) {
    { --i } -> etl::same_as<Iter&>;
    { i-- } -> etl::convertible_to<Iter const&>;
    { *i-- } -> etl::same_as<etl::iter_reference_t<Iter>>;
};
 
} // namespace etl
 
#endif // TETL_CONCEPTS_LEGACY_BIDIRECTIONAL_ITERATOR_HPP