libstdc++-v3/testsuite/20_util/ratio/comparisons/comp2.cc

   1 // { dg-do run { target c++11 } }
   2
   3 // Copyright (C) 2008-2021 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
  17 // along with this library; see the file COPYING3.  If not see
  18 // <http://www.gnu.org/licenses/>.
  19
  20 #include <ratio>
  21 #include <testsuite_hooks.h>
  22
  23 static const std::intmax_t M = INTMAX_MAX;
  24
  25 void
  26 test01()
  27 {
  28   // No overflow with same denominator
  29   VERIFY( (std::ratio_less<std::ratio<M - 2, M>,
  30            std::ratio<M - 1, M>>::value == 1) );
  31
  32   VERIFY( (std::ratio_less<std::ratio<M - 1, M>,
  33            std::ratio<M - 2, M>>::value == 0) );
  34
  35   // No overflow if signs differ
  36   VERIFY( (std::ratio_less<std::ratio<-M, M - 1>,
  37            std::ratio<M - 1, M - 2>>::value == 1) );
  38
  39   VERIFY( (std::ratio_less<std::ratio<M - 1, M - 2>,
  40            std::ratio<-M, M - 1>>::value == 0) );
  41
  42   // No overflow
  43   VERIFY( (std::ratio_less<std::ratio<M, M - 1>,
  44            std::ratio<M, M - 2>>::value == 1) );
  45
  46   VERIFY( (std::ratio_less<std::ratio<-M, M - 1>,
  47            std::ratio<-M, M - 2>>::value == 0) );
  48
  49   VERIFY( (std::ratio_less<std::ratio<M - 2, M - 1>,
  50            std::ratio<M - 1, M>>::value == 1) );
  51 }
  52
  53 int main()
  54 {
  55   test01();
  56   return 0;
  57 }