1 // -*- C++ -*- 2 //===----------------------------------------------------------------------===// 3 // 4 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 5 // See https://llvm.org/LICENSE.txt for license information. 6 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 7 // 8 //===----------------------------------------------------------------------===// 9 10 #ifndef LIBCXX_TEST_SUPPORT_INDIRECTLY_READABLE_H 11 #define LIBCXX_TEST_SUPPORT_INDIRECTLY_READABLE_H 12 13 #include <type_traits> 14 15 template <class Token> 16 struct Common { }; 17 18 template <class Token> 19 struct T1 : Common<Token> { }; 20 21 template <class Token> 22 struct T2 : Common<Token> { }; 23 24 template <template <class> class T1Qual, template <class> class T2Qual, class Token> 25 struct std::basic_common_reference<T1<Token>, T2<Token>, T1Qual, T2Qual> { 26 using type = Common<Token>; 27 }; 28 template <template <class> class T2Qual, template <class> class T1Qual, class Token> 29 struct std::basic_common_reference<T2<Token>, T1<Token>, T2Qual, T1Qual> 30 : std::basic_common_reference<T1<Token>, T2<Token>, T1Qual, T2Qual> 31 { }; 32 33 template <class Token> 34 struct IndirectlyReadable { 35 using value_type = T1<Token>; 36 T2<Token>& operator*() const; 37 }; 38 39 #endif // LIBCXX_TEST_SUPPORT_INDIRECTLY_READABLE_H 40