1 // { dg-do compile { target c++11 } } 2 3 // Copyright (C) 2011-2018 Free Software Foundation, Inc. 4 // 5 // This file is part of the GNU ISO C++ Library. This library is free 6 // software; you can redistribute it and/or modify it under the 7 // terms of the GNU General Public License as published by the 8 // Free Software Foundation; either version 3, or (at your option) 9 // any later version. 10 11 // This library is distributed in the hope that it will be useful, 12 // but WITHOUT ANY WARRANTY; without even the implied warranty of 13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 // GNU General Public License for more details. 15 16 // You should have received a copy of the GNU General Public License along 17 // with this library; see the file COPYING3. If not see 18 // <http://www.gnu.org/licenses/>. 19 20 #include <string> 21 #include <unordered_map> 22 23 namespace 24 { 25 template<typename _Tp> 26 struct final_hash final 27 { operator ()__anon08d554280111::final_hash28 std::size_t operator() (const _Tp&) const noexcept 29 { return 0; } 30 }; 31 } 32 33 // A non-integral type: 34 template class std::unordered_map<std::string, int, final_hash<std::string>>; 35 36 // An integral type; 37 template class std::unordered_map<int, int, final_hash<int>>; 38 39