libstdc++-v3/testsuite/23_containers/forward_list/comparable.cc

   1 // { dg-do run { target c++11 } }
   2
   3 // Copyright (C) 2008-2020 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 #include <forward_list>
  21 #include <testsuite_hooks.h>
  22
  23 void
  24 test01()
  25 {
  26   std::forward_list<double> a = {0.0, 1.0, 2.0, 3.0, 4.0};
  27   std::forward_list<double> b = {0.0, 1.0, 2.0, 3.0, 4.0, 5.0};
  28
  29   VERIFY((a == b) == false);
  30   VERIFY((a <  b) == true);
  31   VERIFY((a != b) == true);
  32   VERIFY((a >  b) == false);
  33   VERIFY((a >= b) == false);
  34   VERIFY((a <= b) == true);
  35
  36   VERIFY((b == a) == false);
  37   VERIFY((b <  a) == false);
  38   VERIFY((b != a) == true);
  39   VERIFY((b >  a) == true);
  40   VERIFY((b >= a) == true);
  41   VERIFY((b <= a) == false);
  42 }
  43
  44 void
  45 test02()
  46 {
  47   // The EqualityComparable requirements only require ==
  48   struct X {
  49     bool operator==(const X&) const { return true; }
  50   };
  51
  52   std::forward_list<X> a(2);
  53   const auto b = a;
  54   VERIFY( a == b );
  55 }
  56
  57 void
  58 test03()
  59 {
  60   // The LessThanComparable requirements only require <
  61   struct X {
  62     bool operator<(const X&) const { return false; }
  63   };
  64
  65   std::forward_list<X> a(2);
  66   const auto b = a;
  67   VERIFY( !(a < b) );
  68   VERIFY( !(a > b) );
  69   VERIFY( a <= b );
  70   VERIFY( a >= b );
  71 }
  72
  73 int main()
  74 {
  75   test01();
  76   test02();
  77   test03();
  78 }