libstdc++-v3/testsuite/20_util/temporary_buffer.cc

   1 // 2002-01-24  Phil Edwards  <pme@gcc.gnu.org>
   2
   3 // Copyright (C) 2002-2022 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 // 20.4.3 temporary buffers
  21
  22 // { dg-require-effective-target hosted }
  23
  24 #include <memory>
  25 #include <testsuite_hooks.h>
  26
  27 struct junk { char j[12]; };
  28
  29 int main(void)
  30 {
  31   typedef std::pair<junk*, std::ptrdiff_t> pair_type;
  32   pair_type results = std::get_temporary_buffer<junk>(5); // { dg-warning "deprecated" "" { target c++17 } }
  33
  34   if (results.second != 0)
  35   {
  36       // make sure it works:  test the returned capacity, and then construct
  37       // some junk in the buffer.
  38       // XXX
  39       VERIFY( results.first != 0 );
  40   }
  41   else
  42   {
  43       // if it says it didn't work, make sure it didn't work
  44       VERIFY( results.first == 0 );
  45   }
  46
  47   std::return_temporary_buffer(results.first);
  48
  49   return 0;
  50 }