libstdc++-v3/testsuite/20_util/memory_resource/1.cc

   1 // { dg-do compile { target c++17 } }
   2
   3 // Copyright (C) 2018-2024 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 <memory_resource>
  21
  22 static_assert(std::is_abstract_v<std::pmr::memory_resource>);
  23 static_assert(std::is_polymorphic_v<std::pmr::memory_resource>);
  24 static_assert(!std::is_final_v<std::pmr::memory_resource>);
  25
  26 struct R0 : std::pmr::memory_resource { };
  27 static_assert(std::is_abstract_v<R0>);
  28
  29 struct R1 : R0 {
  30   void* do_allocate(std::size_t, std::size_t) override;
  31 };
  32 static_assert(std::is_abstract_v<R1>);
  33
  34 struct R2 : R1 {
  35   void do_deallocate(void*, std::size_t, std::size_t) override;
  36 };
  37 static_assert(std::is_abstract_v<R2>);
  38
  39 struct R3 : R2 {
  40   bool do_is_equal(const std::pmr::memory_resource&) const noexcept override;
  41 };
  42 static_assert(!std::is_abstract_v<R3>);
  43 static_assert(std::is_default_constructible_v<R3>);
  44 static_assert(std::is_copy_constructible_v<R3>);
  45 static_assert(std::is_copy_assignable_v<R3>);
  46 static_assert(std::is_destructible_v<R3>);