is_transparent.hpp

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// SPDX-License-Identifier: BSL-1.0
// SPDX-FileCopyrightText: Copyright (C) 2019 Tobias Hienzsch
 
#ifndef TETL_FUNCTIONAL_IS_TRANSPARENT_HPP
#define TETL_FUNCTIONAL_IS_TRANSPARENT_HPP
 
#include <etl/_type_traits/bool_constant.hpp>
#include <etl/_type_traits/is_same.hpp>
#include <etl/_type_traits/void_t.hpp>
 
namespace etl::detail {
 
template <typename T, typename = void>
inline constexpr bool is_transparent_v = false;
 
template <typename T>
inline constexpr bool is_transparent_v<T, void_t<typename T::is_transparent>> = true;
 
template <typename T>
struct is_transparent : bool_constant<is_transparent_v<T>> { };
 
} // namespace etl::detail
 
#endif // TETL_FUNCTIONAL_IS_TRANSPARENT_HPP