contains.hpp

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// SPDX-License-Identifier: BSL-1.0
 
#ifndef TETL_META_CONTAINS_HPP
#define TETL_META_CONTAINS_HPP
 
#include <etl/_meta/list.hpp>
#include <etl/_type_traits/bool_constant.hpp>
#include <etl/_type_traits/is_same.hpp>
 
namespace etl::meta {
 
template <typename Needle, typename Haystack>
struct contains;
 
template <typename Needle, typename... Ts>
struct contains<Needle, list<Ts...>> : etl::bool_constant<(etl::is_same_v<Needle, Ts> or ...)> { };
 
template <typename Needle, typename Haystack>
inline constexpr auto contains_v = contains<Needle, Haystack>::value;
 
} // namespace etl::meta
 
#endif // TETL_META_CONTAINS_HPP