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 #include "test_macros.h" 22 23 #if TEST_STD_VER > 11 24 struct S { 25 std::pair<int, int> a; 26 int k; 27 constexpr S() : a{1,2}, k(std::get<0>(a)) {} 28 }; 29 30 constexpr std::pair<int, int> getP () { return { 3, 4 }; } 31 #endif 32 33 int main() 34 { 35 { 36 typedef std::pair<int, short> P; 37 P p(3, static_cast<short>(4)); 38 assert(std::get<0>(p) == 3); 39 assert(std::get<1>(p) == 4); 40 std::get<0>(p) = 5; 41 std::get<1>(p) = 6; 42 assert(std::get<0>(p) == 5); 43 assert(std::get<1>(p) == 6); 44 } 45 46 #if TEST_STD_VER > 11 47 { 48 static_assert(S().k == 1, ""); 49 static_assert(std::get<1>(getP()) == 4, ""); 50 } 51 #endif 52 53 } 54
