libstdc++-v3/testsuite/27_io/basic_istream/extractors_arithmetic/wchar_t/09.cc

   1 // Copyright (C) 2004-2024 Free Software Foundation, Inc.
   2 //
   3 // This file is part of the GNU ISO C++ Library.  This library is free
   4 // software; you can redistribute it and/or modify it under the
   5 // terms of the GNU General Public License as published by the
   6 // Free Software Foundation; either version 3, or (at your option)
   7 // any later version.
   8
   9 // This library is distributed in the hope that it will be useful,
  10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 // GNU General Public License for more details.
  13
  14 // You should have received a copy of the GNU General Public License along
  15 // with this library; see the file COPYING3.  If not see
  16 // <http://www.gnu.org/licenses/>.
  17
  18 // 27.6.1.2.2 arithmetic extractors
  19
  20 // { dg-do run { xfail lax_strtofp } }
  21
  22 #include <istream>
  23 #include <sstream>
  24 #include <locale>
  25 #include <testsuite_hooks.h>
  26
  27 void test09()
  28 {
  29   std::wstring st(L"2.456e3-+0.567e-2");
  30   std::wstringbuf sb(st);
  31   std::wistream is(&sb);
  32   double f1 = 0, f2 = 0;
  33   wchar_t c;
  34   (is >> std::ws) >> f1;
  35   (is >> std::ws) >> c;
  36   (is >> std::ws) >> f2;
  37   VERIFY( f1 == 2456 );
  38   VERIFY( f2 == (double) 0.00567 ); // N.B. cast removes excess precision
  39   VERIFY( c == L'-' );
  40 }
  41
  42 int main()
  43 {
  44   test09();
  45   return 0;
  46 }