1 //===----------------------------------------------------------------------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is dual licensed under the MIT and the University of Illinois Open 6 // Source Licenses. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 // [func.require] 11 12 // INVOKE 13 #if __cplusplus < 201103L 14 int main () {} // no __invoke in C++03 15 #else 16 17 #include <type_traits> 18 19 template <typename T, int N> 20 struct Array 21 { 22 typedef T type[N]; 23 }; 24 25 struct Type 26 { 27 Array<char, 1>::type& f1(); 28 Array<char, 2>::type& f2() const; 29 30 Array<char, 1>::type& g1() &; 31 Array<char, 2>::type& g2() const &; 32 #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 33 Array<char, 3>::type& g3() &&; 34 Array<char, 4>::type& g4() const &&; 35 #endif 36 }; 37 38 int main() 39 { 40 static_assert(sizeof(std::__invoke(&Type::f1, std::declval<Type >())) == 1, ""); 41 static_assert(sizeof(std::__invoke(&Type::f2, std::declval<Type const >())) == 2, ""); 42 43 static_assert(sizeof(std::__invoke(&Type::g1, std::declval<Type &>())) == 1, ""); 44 static_assert(sizeof(std::__invoke(&Type::g2, std::declval<Type const &>())) == 2, ""); 45 #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 46 static_assert(sizeof(std::__invoke(&Type::g3, std::declval<Type &&>())) == 3, ""); 47 static_assert(sizeof(std::__invoke(&Type::g4, std::declval<Type const&&>())) == 4, ""); 48 #endif 49 } 50 #endif 51
