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 // template<size_t I, class T1, class T2> 15 // typename tuple_element<I, std::pair<T1, T2> >::type& 16 // get(pair<T1, T2>&); 17 18 #include <utility> 19 #include <cassert> 20 21 #if __cplusplus > 201103L 22 struct S { 23 std::pair<int, int> a; 24 int k; 25 constexpr S() : a{1,2}, k(std::get<0>(a)) {} 26 }; 27 28 constexpr std::pair<int, int> getP () { return { 3, 4 }; } 29 #endif 30 31 int main() 32 { 33 { 34 typedef std::pair<int, short> P; 35 P p(3, 4); 36 assert(std::get<0>(p) == 3); 37 assert(std::get<1>(p) == 4); 38 std::get<0>(p) = 5; 39 std::get<1>(p) = 6; 40 assert(std::get<0>(p) == 5); 41 assert(std::get<1>(p) == 6); 42 } 43 44 #if __cplusplus > 201103L 45 { 46 static_assert(S().k == 1, ""); 47 static_assert(std::get<1>(getP()) == 4, ""); 48 } 49 #endif 50 51 } 52
