1 // 2003-07-06  Benjamin Kosnik  <bkoz@redhat.com>
2 
3 // Copyright (C) 2003-2018 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 <locale>
21 #include <sstream>
22 #include <ostream>
23 #include <testsuite_hooks.h>
24 
25 class numpunct_checked : public std::numpunct<char>
26 {
27   typedef std::numpunct<char> base;
28 
29 public:
30   explicit
numpunct_checked(std::size_t refs=0)31   numpunct_checked(std::size_t refs = 0): base(refs) { }
32 
33   string_type
base_truename() const34   base_truename() const
35   { return base::do_truename(); }
36 
37 protected:
38   virtual string_type
do_truename() const39   do_truename() const
40   { return base::do_truename() + "st"; }
41 };
42 
43 // Thwart locale caching strategies that incorrectly overwrite base
44 // class data.
test01()45 void test01()
46 {
47   using namespace std;
48 
49   const string 	basestr("true");
50   const string 	derivedstr("truest");
51 
52   const locale 	loc(locale::classic(), new numpunct_checked);
53   stringbuf 	sbuf;
54   ostream 	os(&sbuf);
55   os.setf(ios_base::boolalpha);
56 
57   // Pre-cache sanity check.
58   const numpunct<char>& np = use_facet<numpunct<char> >(loc);
59   VERIFY( np.truename() == derivedstr );
60 
61   // Cache.
62   os.imbue(loc);
63   os << true;
64   VERIFY( sbuf.str() == derivedstr );
65 
66   // Post-cache sanity check, make sure that base class is still fine.
67   VERIFY( np.truename() == derivedstr );
68   const numpunct_checked& npd = static_cast<const numpunct_checked&>(np);
69   VERIFY( npd.base_truename() == basestr );
70 }
71 
main()72 int main()
73 {
74   test01();
75   return 0;
76 }
77