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 // <utility> 11 12 // template <class T1, class T2> struct pair 13 14 // pair(const T1& x, const T2& y); 15 16 #include <utility> 17 #include <cassert> 18 19 class A 20 { 21 int data_; 22 public: 23 A(int data) : data_(data) {} 24 25 bool operator==(const A& a) const {return data_ == a.data_;} 26 }; 27 28 #if _LIBCPP_STD_VER > 11 29 class AC 30 { 31 int data_; 32 public: 33 constexpr AC(int data) : data_(data) {} 34 35 constexpr bool operator==(const AC& a) const {return data_ == a.data_;} 36 }; 37 #endif 38 39 int main() 40 { 41 { 42 typedef std::pair<float, short*> P; 43 P p(3.5f, 0); 44 assert(p.first == 3.5f); 45 assert(p.second == nullptr); 46 } 47 { 48 typedef std::pair<A, int> P; 49 P p(1, 2); 50 assert(p.first == A(1)); 51 assert(p.second == 2); 52 } 53 54 #if _LIBCPP_STD_VER > 11 55 { 56 typedef std::pair<float, short*> P; 57 constexpr P p(3.5f, 0); 58 static_assert(p.first == 3.5f, ""); 59 static_assert(p.second == nullptr, ""); 60 } 61 { 62 typedef std::pair<AC, int> P; 63 constexpr P p(1, 2); 64 static_assert(p.first == AC(1), ""); 65 static_assert(p.second == 2, ""); 66 } 67 #endif 68 } 69
