is_constructible.hpp

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// SPDX-License-Identifier: BSL-1.0
// SPDX-FileCopyrightText: Copyright (C) 2019 Tobias Hienzsch
 
#ifndef TETL_TYPE_TRAITS_IS_CONSTRUCTIBLE_HPP
#define TETL_TYPE_TRAITS_IS_CONSTRUCTIBLE_HPP
 
#include <etl/_type_traits/bool_constant.hpp>
#include <etl/_type_traits/declval.hpp>
#include <etl/_type_traits/void_t.hpp>
 
namespace etl {
 
namespace detail {
template <typename, typename T, typename... Args>
struct is_constructible_helper : false_type { };
 
template <typename T, typename... Args>
struct is_constructible_helper<void_t<decltype(T(declval<Args>()...))>, T, Args...> : true_type { };
} // namespace detail
 
template <typename T, typename... Args>
using is_constructible = detail::is_constructible_helper<void_t<>, T, Args...>;
 
template <typename T, typename... Args>
inline constexpr bool is_constructible_v = is_constructible<T, Args...>::value;
 
} // namespace etl
 
#endif // TETL_TYPE_TRAITS_IS_CONSTRUCTIBLE_HPP