libstdc++-v3/testsuite/20_util/tuple/creation_functions/constexpr.cc

   1 // { dg-do compile }
   2 // { dg-options "-std=gnu++0x" }
   3
   4 // Copyright (C) 2011-2014 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
  22 // NOTE: This makes use of the fact that we know how moveable
  23 // is implemented on pair, and also vector. If the implementation
  24 // changes this test may begin to fail.
  25
  26 #include <tuple>
  27
  28 bool test __attribute__((unused)) = true;
  29
  30
  31 // make_tuple
  32 void
  33 test_make_tuple()
  34 {
  35   {
  36     typedef std::tuple<int, float> tuple_type;
  37     constexpr tuple_type p1 __attribute__((unused))
  38       = std::make_tuple(22, 22.222);
  39   }
  40
  41   {
  42     typedef std::tuple<int, float, int> tuple_type;
  43     constexpr tuple_type p1 __attribute__((unused))
  44       = std::make_tuple(22, 22.222, 77799);
  45   }
  46 }
  47
  48 #if 0
  49 // forward_as_tuple
  50 void
  51 test_forward_as_tuple()
  52 {
  53   {
  54     typedef std::tuple<int, float> tuple_type;
  55     constexpr tuple_type p1 __attribute__((unused))
  56       = std::forward_as_tuple(22, 22.222);
  57   }
  58
  59   {
  60     typedef std::tuple<int, float, int> tuple_type;
  61     constexpr tuple_type p1 __attribute__((unused))
  62       = std::forward_as_tuple(22, 22.222, 77799);
  63   }
  64 }
  65 #endif
  66
  67 #if 0
  68 // tie
  69 void
  70 test_tie()
  71 {
  72   {
  73     int i(22);
  74     float f(22.222);
  75     typedef std::tuple<int, float> tuple_type;
  76     constexpr tuple_type p1 __attribute__((unused))
  77       = std::tie(i, f);
  78   }
  79
  80   {
  81     int i(22);
  82     float f(22.222);
  83     int ii(77799);
  84
  85     typedef std::tuple<int, float, int> tuple_type;
  86     constexpr tuple_type p1 __attribute__((unused))
  87       = std::tie(i, f, ii);
  88   }
  89 }
  90 #endif
  91
  92 // get
  93 void
  94 test_get()
  95 {
  96   {
  97     typedef std::tuple<int, float> tuple_type;
  98     constexpr tuple_type t1 { 55, 77.77 };
  99     constexpr auto var __attribute__((unused))
 100       = std::get<1>(t1);
 101   }
 102
 103   {
 104     typedef std::tuple<int, float, int> tuple_type;
 105     constexpr tuple_type t1 { 55, 77.77, 99 };
 106     constexpr auto var __attribute__((unused))
 107       = std::get<2>(t1);
 108   }
 109 }
 110
 111 // tuple_cat
 112 void
 113 test_tuple_cat()
 114 {
 115   typedef std::tuple<int, float>        tuple_type1;
 116   typedef std::tuple<int, int, float> tuple_type2;
 117
 118   constexpr tuple_type1 t1 { 55, 77.77 };
 119   constexpr tuple_type2 t2 { 55, 99, 77.77 };
 120   constexpr auto cat1 __attribute__((unused)) = std::tuple_cat(t1, t2);
 121 }
 122
 123 int
 124 main()
 125 {
 126   test_make_tuple();
 127   test_get();
 128   test_tuple_cat();
 129
 130   return 0;
 131 }