libstdc++-v3/testsuite/20_util/tuple/element_access/get_by_type.cc

   1 // { dg-options "-std=gnu++1y" }
   2
   3 // Copyright (C) 2013 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 <tuple>
  23 #include <testsuite_hooks.h>
  24
  25 using namespace std;
  26
  27 int
  28 main()
  29 {
  30   bool test __attribute__((unused)) = true;
  31
  32   int j=1;
  33   const int k=2;
  34   tuple<int,int &,const int&> a(0,j,k);
  35   const tuple<int,int &,const int&> b(1,j,k);
  36   VERIFY(get<int>(a)==0 && get<int&>(a)==1 && get<const int&>(a)==2);
  37   get<0>(a)=3;
  38   get<1>(a)=4;
  39   VERIFY(get<int>(a)==3 && get<int&>(a)==4);
  40   VERIFY(j==4);
  41   get<1>(b)=5;
  42   VERIFY(get<int>(b)==1 && get<int&>(b)==5 && get<const int&>(b)==2);
  43   VERIFY(j==5);
  44 }