underlying_type.hpp

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// SPDX-License-Identifier: BSL-1.0
// SPDX-FileCopyrightText: Copyright (C) 2019 Tobias Hienzsch
 
#ifndef TETL_TYPE_TRAITS_IS_UNDERLYING_TYPE_HPP
#define TETL_TYPE_TRAITS_IS_UNDERLYING_TYPE_HPP
 
#include <etl/_config/all.hpp>
 
#include <etl/_type_traits/is_enum.hpp>
 
namespace etl {
 
namespace detail {
template <typename T>
struct underlying_type { };
 
template <typename T>
    requires is_enum_v<T>
struct underlying_type<T> {
    using type = __underlying_type(T);
};
 
} // namespace detail
 
/// The underlying type of an enum.
/// \ingroup type_traits
template <typename T>
struct underlying_type : detail::underlying_type<T> { };
 
/// \ingroup type_traits
template <typename T>
using underlying_type_t = typename underlying_type<T>::type;
 
} // namespace etl
 
#endif // TETL_TYPE_TRAITS_IS_UNDERLYING_TYPE_HPP