libstdc++-v3/testsuite/20_util/ratio/operations/47913.cc

   1 // { dg-options "-std=gnu++0x" }
   2 // { dg-require-cstdint "" }
   3
   4 // Copyright (C) 2011-2013 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
  18 // along with this library; see the file COPYING3.  If not see
  19 // <http://www.gnu.org/licenses/>.
  20
  21 #include <ratio>
  22 #include <limits>
  23 #include <testsuite_hooks.h>
  24
  25 // libstdc++/47913
  26 void test01()
  27 {
  28   bool test __attribute__((unused)) = true;
  29   using namespace std;
  30
  31   const intmax_t m1 = (intmax_t)1 << (4 * sizeof(intmax_t) - 1);
  32   typedef ratio_add<ratio<1, (m1 - 1) * (m1 - 2)>,
  33                     ratio<1, (m1 - 3) * (m1 - 2)> > ra_type1;
  34   VERIFY( ra_type1::num == 2 );
  35   VERIFY( ra_type1::den == (m1 - 1) * (m1 - 3) );
  36
  37   const intmax_t m2 = numeric_limits<intmax_t>::max();
  38   typedef ratio_add<ratio<m2, 2>,
  39                     ratio<-m2, 3> > ra_type2;
  40   VERIFY( ra_type2::num == m2 );
  41   VERIFY( ra_type2::den == 6 );
  42
  43   typedef ratio_add<ratio<m2 / 7 * 5 - 1, 5>,
  44                     ratio<-m2 + 2, 7> > ra_type3;
  45   ra_type3();
  46
  47   const intmax_t m3 = numeric_limits<intmax_t>::max() - 1;
  48   typedef ratio_add<ratio<-m3 / 7 * 5 - 1, 5>,
  49                     ratio<m3, 7> > ra_type4;
  50   ra_type4();
  51
  52   const intmax_t m4 = numeric_limits<intmax_t>::max() / 2;
  53   typedef ratio_add<ratio<m4 - 5, 15>,
  54                     ratio<m4, 35> > ra_type5;
  55   VERIFY( ra_type5::num == (2 * m4 - 7) );
  56   VERIFY( ra_type5::den == 21 );
  57 }
  58
  59 int main()
  60 {
  61   test01();
  62   return 0;
  63 }