libstdc++-v3/testsuite/22_locale/num_put/put/char/8.cc

   1 // Copyright (C) 2003-2020 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 // 22.2.2.2.1  num_put members
  19
  20 #include <locale>
  21 #include <sstream>
  22 #include <testsuite_hooks.h>
  23
  24 struct Ctype: std::ctype<char>
  25 {
  26   char
  27   do_widen(char c) const
  28   { return 'A' + c % 26; }
  29
  30   const char*
  31   do_widen(const char* lo, const char* hi, char* to) const
  32   {
  33     for (; lo != hi; *to++ = Ctype::do_widen(*lo++));
  34     return hi;
  35   }
  36 };
  37
  38 // See http://gcc.gnu.org/ml/libstdc++/2003-11/msg00154.html
  39 void test01()
  40 {
  41   using namespace std;
  42
  43   ostringstream oss;
  44   oss.imbue(locale(locale::classic(), new Ctype));
  45   const num_put<char>& np = use_facet<num_put<char> >(oss.getloc());
  46
  47   const string empty;
  48   string result;
  49   long inum = 123;
  50   double fnum = 123.456;
  51
  52   np.put(oss.rdbuf(), oss, '+', inum);
  53   result = oss.str();
  54   VERIFY( result == "XYZ" );
  55
  56   oss.clear();
  57   oss.str(empty);
  58   np.put(oss.rdbuf(), oss, '+', fnum);
  59   result = oss.str();
  60   VERIFY( result == "XYZ.ABC" );
  61 }
  62
  63 int main()
  64 {
  65   test01();
  66 }