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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> 27 struct __tuple_like_ext : false_type {}; 28 29 template <class _Tp> 30 struct __tuple_like_ext<const _Tp> : public __tuple_like_ext<_Tp> {}; 31 template <class _Tp> 32 struct __tuple_like_ext<volatile _Tp> : public __tuple_like_ext<_Tp> {}; 33 template <class _Tp> 34 struct __tuple_like_ext<const volatile _Tp> : public __tuple_like_ext<_Tp> {}; 35 36 #ifndef _LIBCPP_CXX03_LANG 37 template <class... _Tp> 38 struct __tuple_like_ext<tuple<_Tp...> > : true_type {}; 39 #endif 40 41 template <class _T1, class _T2> 42 struct __tuple_like_ext<pair<_T1, _T2> > : true_type {}; 43 44 template <class _Tp, size_t _Size> 45 struct __tuple_like_ext<array<_Tp, _Size> > : true_type {}; 46 47 template <class... _Tp> 48 struct __tuple_like_ext<__tuple_types<_Tp...> > : true_type {}; 49 50 _LIBCPP_END_NAMESPACE_STD 51 52 #endif // _LIBCPP___TUPLE_TUPLE_LIKE_EXT_H