1 // { dg-options "-std=gnu++2a" } 2 // { dg-do run { target c++2a } } 3 4 // Copyright (C) 2020 Free Software Foundation, Inc. 5 // 6 // This file is part of the GNU ISO C++ Library. This library is free 7 // software; you can redistribute it and/or modify it under the 8 // terms of the GNU General Public License as published by the 9 // Free Software Foundation; either version 3, or (at your option) 10 // any later version. 11 // 12 // This library is distributed in the hope that it will be useful, 13 // but WITHOUT ANY WARRANTY; without even the implied warranty of 14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 // GNU General Public License for more details. 16 // 17 // You should have received a copy of the GNU General Public License along 18 // with this library; see the file COPYING3. If not see 19 // <http://www.gnu.org/licenses/>. 20 21 #include <set> 22 #include <testsuite_hooks.h> 23 24 struct aggressive_aggregate 25 { 26 int a; 27 int b; 28 }; 29 operator <(const aggressive_aggregate & a,const aggressive_aggregate & b)30bool operator<(const aggressive_aggregate& a, 31 const aggressive_aggregate& b) 32 { 33 return a.a < b.a; 34 }; 35 test_emplace()36void test_emplace() 37 { 38 std::set<aggressive_aggregate> x; 39 auto emplaced = x.emplace(1, 2); 40 VERIFY(emplaced.first->a == 1); 41 VERIFY(emplaced.first->b == 2); 42 emplaced = x.emplace(2); 43 VERIFY(emplaced.first->a == 2); 44 VERIFY(emplaced.first->b == 0); 45 emplaced = x.emplace(); 46 VERIFY(emplaced.first->a == 0); 47 VERIFY(emplaced.first->b == 0); 48 } 49 test_emplace_hint()50void test_emplace_hint() 51 { 52 std::set<aggressive_aggregate> x; 53 auto it = x.emplace_hint(x.begin(), 54 3, 2); 55 VERIFY(it->a == 3); 56 VERIFY(it->b == 2); 57 it = x.emplace_hint(x.begin(), 58 4); 59 VERIFY(it->a == 4); 60 VERIFY(it->b == 0); 61 it = x.emplace_hint(x.begin()); 62 VERIFY(it->a == 0); 63 VERIFY(it->b == 0); 64 } 65 main()66int main() 67 { 68 test_emplace(); 69 test_emplace_hint(); 70 } 71