1 //===----------------------------------------------------------------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #ifndef _LIBCPP___TUPLE_TUPLE_LIKE_EXT_H 10 #define _LIBCPP___TUPLE_TUPLE_LIKE_EXT_H 11 12 #include <__config> 13 #include <__fwd/array.h> 14 #include <__fwd/pair.h> 15 #include <__fwd/tuple.h> 16 #include <__tuple/tuple_types.h> 17 #include <__type_traits/integral_constant.h> 18 #include <cstddef> 19 20 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 21 # pragma GCC system_header 22 #endif 23 24 _LIBCPP_BEGIN_NAMESPACE_STD 25 26 template <class _Tp> struct __tuple_like_ext : false_type {}; 27 28 template <class _Tp> struct __tuple_like_ext<const _Tp> : public __tuple_like_ext<_Tp> {}; 29 template <class _Tp> struct __tuple_like_ext<volatile _Tp> : public __tuple_like_ext<_Tp> {}; 30 template <class _Tp> struct __tuple_like_ext<const volatile _Tp> : public __tuple_like_ext<_Tp> {}; 31 32 #ifndef _LIBCPP_CXX03_LANG 33 template <class... _Tp> struct __tuple_like_ext<tuple<_Tp...> > : true_type {}; 34 #endif 35 36 template <class _T1, class _T2> struct __tuple_like_ext<pair<_T1, _T2> > : true_type {}; 37 38 template <class _Tp, size_t _Size> struct __tuple_like_ext<array<_Tp, _Size> > : true_type {}; 39 40 template <class... _Tp> struct __tuple_like_ext<__tuple_types<_Tp...> > : true_type {}; 41 42 _LIBCPP_END_NAMESPACE_STD 43 44 #endif // _LIBCPP___TUPLE_TUPLE_LIKE_EXT_H 45