uses_allocator.hpp

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// SPDX-License-Identifier: BSL-1.0
// SPDX-FileCopyrightText: Copyright (C) 2019 Tobias Hienzsch
 
#ifndef TETL_MEMORY_USES_ALLOCATOR_HPP
#define TETL_MEMORY_USES_ALLOCATOR_HPP
 
#include <etl/_type_traits/bool_constant.hpp>
#include <etl/_type_traits/is_convertible.hpp>
#include <etl/_type_traits/void_t.hpp>
 
namespace etl {
 
namespace detail {
template <typename Type, typename Alloc, typename = void>
struct uses_allocator_impl : false_type { };
 
template <typename Type, typename Alloc>
struct uses_allocator_impl<Type, Alloc, void_t<typename Type::allocator_type>>
    : is_convertible<Alloc, typename Type::allocator_type>::type { };
} // namespace detail
 
/// \brief If T has a member typedef allocator_type which is convertible from
/// Alloc, the member constant value is true. Otherwise value is false.
template <typename Type, typename Alloc>
struct uses_allocator : detail::uses_allocator_impl<Type, Alloc>::type { };
 
/// \brief If T has a member typedef allocator_type which is convertible from
/// Alloc, the member constant value is true. Otherwise value is false.
template <typename Type, typename Alloc>
inline constexpr auto uses_allocator_v = uses_allocator<Type, Alloc>::value;
 
} // namespace etl
 
#endif // TETL_MEMORY_USES_ALLOCATOR_HPP