libstdc++-v3/testsuite/20_util/pointer_traits/pointer_to.cc

   1 // { dg-do run { target c++11 } }
   2
   3 // Copyright (C) 2011-2024 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
  21 #include <memory>
  22 #include <testsuite_hooks.h>
  23
  24 struct Ptr
  25 {
  26   typedef bool element_type;
  27   bool* value;
  28
  29   template<typename> using rebind = Ptr;
  30
  31   static Ptr pointer_to(bool& b) { return Ptr{&b}; }
  32 };
  33
  34 bool operator==(const Ptr& l, const Ptr& r) { return l.value == r.value; }
  35
  36 void test01()
  37 {
  38   bool test = true;
  39   Ptr p{ &test };
  40
  41   VERIFY( std::pointer_traits<Ptr>::pointer_to(test) == p );
  42 }
  43
  44 void test02()
  45 {
  46   bool test = true;
  47
  48   VERIFY( std::pointer_traits<bool*>::pointer_to(test) == &test );
  49 }
  50
  51 int main()
  52 {
  53   test01();
  54   test02();
  55   return 0;
  56 }