libstdc++-v3/testsuite/20_util/tuple/cons/constructor.cc

   1 // { dg-do run { target c++11 } }
   2
   3 // Copyright (C) 2007-2023 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 <utility> // for pair
  24 #include <testsuite_hooks.h>
  25
  26 using namespace std;
  27
  28 int
  29 main()
  30 {
  31   int x1=0,x2=0;
  32   const int &z1=x1;
  33
  34   // Test empty constructor
  35   tuple<> ta __attribute__((unused));
  36   tuple<int,int> tb;
  37   // Test construction from values
  38   tuple<int,int> tc(x1,x2);
  39   tuple<int,int&> td(x1,x2);
  40   tuple<const int&> te(z1);
  41   x1=1;
  42   x2=1;
  43   VERIFY(get<0>(td) == 0 && get<1>(td) == 1 && get<0>(te) == 1);
  44
  45   // Test identical tuple copy constructor
  46   tuple<int,int> tf(tc);
  47   tuple<int,int> tg(td);
  48   tuple<const int&> th(te);
  49   // Test different tuple copy constructor
  50   tuple<int,double> ti(tc);
  51   tuple<int,double> tj(td);
  52   //tuple<int&, int&> tk(tc);
  53   tuple<const int&, const int&> tl(tc);
  54   tuple<const int&, const int&> tm(tl);
  55   // Test constructing from a pair
  56   pair<int,int> pair1(1,1);
  57   const pair<int,int> pair2(pair1);
  58   tuple<int,int> tn(pair1);
  59   tuple<int,const int&> to(pair1);
  60   tuple<int,int> tp(pair2);
  61   tuple<int,const int&> tq(pair2);
  62   return 0;
  63 }