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 // UNSUPPORTED: c++98, c++03 11 12 // <utility> 13 14 // template <class T1, class T2> struct pair 15 16 // struct piecewise_construct_t { }; 17 // constexpr piecewise_construct_t piecewise_construct = piecewise_construct_t(); 18 19 #include <utility> 20 #include <tuple> 21 #include <cassert> 22 23 class A 24 { 25 int i_; 26 char c_; 27 public: 28 A(int i, char c) : i_(i), c_(c) {} 29 int get_i() const {return i_;} 30 char get_c() const {return c_;} 31 }; 32 33 class B 34 { 35 double d_; 36 unsigned u1_; 37 unsigned u2_; 38 public: 39 B(double d, unsigned u1, unsigned u2) : d_(d), u1_(u1), u2_(u2) {} 40 double get_d() const {return d_;} 41 unsigned get_u1() const {return u1_;} 42 unsigned get_u2() const {return u2_;} 43 }; 44 45 int main() 46 { 47 std::pair<A, B> p(std::piecewise_construct, 48 std::make_tuple(4, 'a'), 49 std::make_tuple(3.5, 6u, 2u)); 50 assert(p.first.get_i() == 4); 51 assert(p.first.get_c() == 'a'); 52 assert(p.second.get_d() == 3.5); 53 assert(p.second.get_u1() == 6u); 54 assert(p.second.get_u2() == 2u); 55 } 56
