libstdc++-v3/testsuite/20_util/tuple/78939.cc

   1 // Copyright (C) 2017-2020 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 // PR libstdc++/78939
  22
  23 #include <utility>
  24
  25 struct A { int i, j; };
  26
  27 int
  28 test01()
  29 {
  30   A a{};
  31   const auto [i, j] = a;
  32   return i + j;
  33 }
  34
  35 int
  36 test02()
  37 {
  38   A a{};
  39   volatile auto [i, j] = a;
  40   return i + j;
  41 }
  42
  43 int
  44 test03()
  45 {
  46   A a{};
  47   const volatile auto [i, j] = a;
  48   return i + j;
  49 }