libstdc++-v3/testsuite/20_util/integer_comparisons/equal.cc

   1 // Copyright (C) 2020-2023 Free Software Foundation, Inc.
   2 //
   3 // This file is part of the GNU ISO C++ Library.  This library is free
   4 // software; you can redistribute it and/or modify it under the
   5 // terms of the GNU General Public License as published by the
   6 // Free Software Foundation; either version 3, or (at your option)
   7 // any later version.
   8
   9 // This library is distributed in the hope that it will be useful,
  10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 // GNU General Public License for more details.
  13
  14 // You should have received a copy of the GNU General Public License along
  15 // with this library; see the file COPYING3.  If not see
  16 // <http://www.gnu.org/licenses/>.
  17
  18 // { dg-do run { target c++20 } }
  19
  20 #include <utility>
  21 #include <limits>
  22 #include <testsuite_hooks.h>
  23
  24 void
  25 test01()
  26 {
  27   unsigned int u = std::numeric_limits<unsigned int>::max();
  28   int s = -1;
  29   VERIFY( !std::cmp_equal(s, u) );
  30 }
  31
  32 constexpr bool
  33 test02()
  34 {
  35   unsigned int u = std::numeric_limits<unsigned int>::max();
  36   int s = -1;
  37   if (std::cmp_equal(s, u))
  38     throw 1;
  39   if (std::cmp_equal(u, s))
  40     throw 2;
  41   return true;
  42 }
  43
  44 void
  45 test03()
  46 {
  47   short ss = -1;
  48   int s = -1;
  49   VERIFY( std::cmp_equal(s, ss) );
  50   VERIFY( std::cmp_equal(ss, s) );
  51
  52   unsigned int u = (unsigned int) -1;
  53   VERIFY( !std::cmp_equal(s, u) );
  54   VERIFY( !std::cmp_equal(u, s) );
  55   VERIFY( !std::cmp_equal(ss, u) );
  56   VERIFY( !std::cmp_equal(u, ss) );
  57
  58   unsigned long long ul = (unsigned long long) -1;
  59   VERIFY( !std::cmp_equal(s, ul) );
  60   VERIFY( !std::cmp_equal(ul, s) );
  61   VERIFY( !std::cmp_equal(ss, ul) );
  62   VERIFY( !std::cmp_equal(ul, ss) );
  63   VERIFY( !std::cmp_equal(u, ul) );
  64   VERIFY( !std::cmp_equal(ul, u) );
  65 }
  66
  67 int
  68 main()
  69 {
  70   test01();
  71   static_assert( test02() );
  72   test03();
  73 }