libstdc++-v3/testsuite/20_util/tuple/requirements/dr2367.cc

   1 // { dg-do compile }
   2 // { dg-options "-std=gnu++11" }
   3
   4 // Copyright (C) 2015-2016 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 <tuple>
  22 #include <type_traits>
  23
  24 // DR 2367, pair and tuple are not correctly implemented for is_constructible with no args
  25 void test_default_constructible()
  26 {
  27   struct X
  28   {
  29     X() = delete;
  30   };
  31
  32   typedef std::tuple<int, X> T;
  33   static_assert(!std::is_constructible<T>::value, "");
  34   static_assert(!std::is_default_constructible<T>::value, "");
  35
  36   typedef std::tuple<int, int, X> T2;
  37   static_assert(!std::is_constructible<T2>::value, "");
  38   static_assert(!std::is_default_constructible<T2>::value, "");
  39
  40
  41 }
  42
  43 int main()
  44 {
  45   test_default_constructible();
  46   return 0;
  47 }