libstdc++-v3/testsuite/23_containers/unordered_set/pmr_typedefs.cc

   1 // Copyright (C) 2018-2020 Free Software Foundation, Inc.
   2 //
   3 // This file is part of the GNU ISO C++ Library.  This library is free
   4 // software; you can redistribute it and/or modify it under the
   5 // terms of the GNU General Public License as published by the
   6 // Free Software Foundation; either version 3, or (at your option)
   7 // any later version.
   8
   9 // This library is distributed in the hope that it will be useful,
  10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 // GNU General Public License for more details.
  13
  14 // You should have received a copy of the GNU General Public License along
  15 // with this library; see the file COPYING3.  If not see
  16 // <http://www.gnu.org/licenses/>.
  17
  18 // { dg-options "-std=gnu++17" }
  19 // { dg-do compile { target c++17 } }
  20
  21 #include <unordered_set>
  22 #include <memory_resource>
  23
  24 struct X { };
  25 struct Hash { std::size_t operator()(X) const { return 0; } };
  26 struct Eq { bool operator()(X, X) const { return true; } };
  27
  28 static_assert(std::is_same_v<std::pmr::unordered_set<X>,
  29     std::unordered_set<X, std::hash<X>, std::equal_to<X>,
  30       std::pmr::polymorphic_allocator<X>>>);
  31 static_assert(std::is_same_v<std::pmr::unordered_set<X, Hash>,
  32     std::unordered_set<X, Hash, std::equal_to<X>,
  33       std::pmr::polymorphic_allocator<X>>>);
  34 static_assert(std::is_same_v<std::pmr::unordered_set<X, Hash, Eq>,
  35     std::unordered_set<X, Hash, Eq,
  36       std::pmr::polymorphic_allocator<X>>>);