libstdc++-v3/testsuite/26_numerics/complex/cons/48760.cc

   1 // { dg-require-c-std "" }
   2
   3 // Copyright (C) 2011-2020 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 along
  17 // with this library; see the file COPYING3.  If not see
  18 // <http://www.gnu.org/licenses/>.
  19
  20 #include <complex>
  21 #include <limits>
  22 #include <testsuite_hooks.h>
  23
  24 template<typename T>
  25   void do_test01()
  26   {
  27     if (std::numeric_limits<T>::has_quiet_NaN)
  28       {
  29         std::complex<T> c1(T(0), std::numeric_limits<T>::quiet_NaN());
  30         VERIFY( c1.real() == T(0) );
  31         VERIFY( std::isnan(c1.imag()) );
  32
  33         std::complex<T> c2(std::numeric_limits<T>::quiet_NaN(), T(0));
  34         VERIFY( std::isnan(c2.real()) );
  35         VERIFY( c2.imag() == T(0) );
  36
  37         std::complex<T> c3(std::numeric_limits<T>::quiet_NaN(),
  38                            std::numeric_limits<T>::quiet_NaN());
  39         VERIFY( std::isnan(c3.real()) );
  40         VERIFY( std::isnan(c3.imag()) );
  41       }
  42   }
  43
  44 // libstdc++/48760
  45 void test01()
  46 {
  47   do_test01<float>();
  48   do_test01<double>();
  49   do_test01<long double>();
  50 }
  51
  52 int main()
  53 {
  54   test01();
  55   return 0;
  56 }