indirectly_unary_invocable.hpp

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// SPDX-License-Identifier: BSL-1.0
// SPDX-FileCopyrightText: Copyright (C) 2024 Tobias Hienzsch
 
#ifndef TETL_ITERATOR_INDIRECTLY_UNARY_INVOCABLE_HPP
#define TETL_ITERATOR_INDIRECTLY_UNARY_INVOCABLE_HPP
 
#include <etl/_concepts/common_reference_with.hpp>
#include <etl/_concepts/copy_constructible.hpp>
#include <etl/_concepts/invocable.hpp>
#include <etl/_iterator/indirectly_readable.hpp>
#include <etl/_iterator/iter_common_reference_t.hpp>
#include <etl/_iterator/iter_reference_t.hpp>
#include <etl/_iterator/iter_value_t.hpp>
#include <etl/_type_traits/invoke_result.hpp>
 
namespace etl {
 
// clang-format off
template <typename F, typename Iter>
concept indirectly_unary_invocable =
        etl::indirectly_readable<Iter>
    and etl::copy_constructible<F>
    and etl::invocable<F&, etl::iter_value_t<Iter>&>
    and etl::invocable<F&, etl::iter_reference_t<Iter>>
    and etl::invocable<F&, etl::iter_common_reference_t<Iter>>
    and etl::common_reference_with<etl::invoke_result_t<F&, etl::iter_value_t<Iter>&>, etl::invoke_result_t<F&, etl::iter_reference_t<Iter>>>;
// clang-format on
 
} // namespace etl
 
#endif // TETL_ITERATOR_INDIRECTLY_UNARY_INVOCABLE_HPP