libstdc++-v3/testsuite/26_numerics/headers/cmath/dr550.cc

   1 // { dg-options "-std=gnu++0x" }
   2 // 2008-05-26  Paolo Carlini  <paolo.carlini@oracle.com>
   3 //
   4 // Copyright (C) 2008 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 2, 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 COPYING.  If not, write to the Free
  19 // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
  20 // USA.
  21
  22 #include <cmath>
  23 #include <testsuite_hooks.h>
  24 #include <testsuite_tr1.h>
  25
  26 // DR 550. What should the return type of pow(float,int) be?
  27 void test01()
  28 {
  29   bool test __attribute__((unused)) = true;
  30   using __gnu_test::check_ret_type;
  31
  32   const int          i1 = 1;
  33   const float        f1 = 1.0f;
  34   const double       d1 = 1.0;
  35   const long double ld1 = 1.0l;
  36
  37   check_ret_type<double>(std::pow(f1, i1));
  38   VERIFY( std::pow(f1, i1) == std::pow(double(f1), double(i1)) );
  39   check_ret_type<double>(std::pow(d1, i1));
  40   check_ret_type<long double>(std::pow(ld1, i1));
  41 }
  42
  43 int main()
  44 {
  45   test01();
  46   return 0;
  47 }