| //===----------------------------------------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef _LIBCPP___TYPE_TRAITS_TYPE_LIST_H |
| #define _LIBCPP___TYPE_TRAITS_TYPE_LIST_H |
| |
| #include <__config> |
| #include <cstddef> |
| |
| #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
| # pragma GCC system_header |
| #endif |
| |
| _LIBCPP_BEGIN_NAMESPACE_STD |
| |
| template <class _Hp, class _Tp> |
| struct __type_list { |
| typedef _Hp _Head; |
| typedef _Tp _Tail; |
| }; |
| |
| template <class _TypeList, size_t _Size, bool = _Size <= sizeof(typename _TypeList::_Head)> |
| struct __find_first; |
| |
| template <class _Hp, class _Tp, size_t _Size> |
| struct __find_first<__type_list<_Hp, _Tp>, _Size, true> { |
| typedef _LIBCPP_NODEBUG _Hp type; |
| }; |
| |
| template <class _Hp, class _Tp, size_t _Size> |
| struct __find_first<__type_list<_Hp, _Tp>, _Size, false> { |
| typedef _LIBCPP_NODEBUG typename __find_first<_Tp, _Size>::type type; |
| }; |
| |
| _LIBCPP_END_NAMESPACE_STD |
| |
| #endif // _LIBCPP___TYPE_TRAITS_TYPE_LIST_H |