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

   1 // { dg-do run { target c++11 } }
   2 // 2008-05-26  Paolo Carlini  <paolo.carlini@oracle.com>
   3 //
   4 // Copyright (C) 2008-2018 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 along
  18 // with this library; see the file COPYING3.  If not see
  19 // <http://www.gnu.org/licenses/>.
  20
  21 #include <cmath>
  22 #include <testsuite_hooks.h>
  23 #include <testsuite_tr1.h>
  24
  25 // DR 550. What should the return type of pow(float,int) be?
  26 void test01()
  27 {
  28   using __gnu_test::check_ret_type;
  29
  30   const int          i1 = 1;
  31   const float        f1 = 1.0f;
  32   const double       d1 = 1.0;
  33   const long double ld1 = 1.0l;
  34
  35   check_ret_type<double>(std::pow(f1, i1));
  36   VERIFY( std::pow(f1, i1) == std::pow(double(f1), double(i1)) );
  37   check_ret_type<double>(std::pow(d1, i1));
  38   check_ret_type<long double>(std::pow(ld1, i1));
  39 }
  40
  41 int main()
  42 {
  43   test01();
  44   return 0;
  45 }