1// { dg-do compile } 2// { dg-options "-std=gnu++11" } 3 4// Copyright (C) 2011-2015 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 <string> 22#include <unordered_map> 23 24namespace 25{ 26 template<typename _Tp> 27 struct final_hash final 28 { 29 std::size_t operator() (const _Tp&) const noexcept 30 { return 0; } 31 }; 32} 33 34// A non-integral type: 35template class std::unordered_map<std::string, int, final_hash<std::string>>; 36 37// An integral type; 38template class std::unordered_map<int, int, final_hash<int>>; 39 40