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

   1 // { dg-options "-std=gnu++17" }
   2 // { dg-do compile { target c++17 } }
   3
   4 // Copyright (C) 2018-2021 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 <memory_resource>
  22
  23 static_assert(std::is_abstract_v<std::pmr::memory_resource>);
  24 static_assert(std::is_polymorphic_v<std::pmr::memory_resource>);
  25 static_assert(!std::is_final_v<std::pmr::memory_resource>);
  26
  27 struct R0 : std::pmr::memory_resource { };
  28 static_assert(std::is_abstract_v<R0>);
  29
  30 struct R1 : R0 {
  31   void* do_allocate(std::size_t, std::size_t) override;
  32 };
  33 static_assert(std::is_abstract_v<R1>);
  34
  35 struct R2 : R1 {
  36   void do_deallocate(void*, std::size_t, std::size_t) override;
  37 };
  38 static_assert(std::is_abstract_v<R2>);
  39
  40 struct R3 : R2 {
  41   bool do_is_equal(const std::pmr::memory_resource&) const noexcept override;
  42 };
  43 static_assert(!std::is_abstract_v<R3>);
  44 static_assert(std::is_default_constructible_v<R3>);
  45 static_assert(std::is_copy_constructible_v<R3>);
  46 static_assert(std::is_copy_assignable_v<R3>);
  47 static_assert(std::is_destructible_v<R3>);