libstdc++-v3/testsuite/tr1/6_containers/tuple/tuple_element.cc

   1 // 2004-09-23 Chris Jefferson <chris@bubblescope.net>
   2
   3 // Copyright (C) 2004-2017 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 // Tuple
  21
  22 #include <tr1/tuple>
  23 #include <testsuite_hooks.h>
  24
  25 using namespace std::tr1;
  26
  27 struct foo
  28 { };
  29
  30 int
  31 main()
  32 {
  33   // As foo isn't constructible from anything else, this
  34   // lets us check if type is returning foo when it should
  35   foo q1;
  36   tuple_element<0,tuple<foo,void,int> >::type q2(q1);
  37   tuple_element<2,tuple<void,int,foo> >::type q3(q1);
  38 }
  39