1 // 1999-10-14 bkoz
2 
3 // Copyright (C) 1999-2021 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 
21 // 27.6.1.1.2 class basic_istream::sentry
22 
23 #include <istream>
24 #include <sstream>
25 #include <testsuite_hooks.h>
26 
test01()27 void test01()
28 {
29   const char* lit01 = "stereolab on the bolsinga tip";
30   const std::string str01(lit01);
31 
32   std::stringbuf strbuf01;
33   std::stringbuf strbuf02(str01);
34   std::istream istr01(&strbuf01);
35   std::istream istr02(&strbuf02);
36 
37   // test negatives
38   std::istream::sentry sentry01(istr01);
39   VERIFY( bool(sentry01) == false );
40 
41   std::istream::sentry sentry02(istr01, true);
42   VERIFY( bool(sentry02) == false );
43 
44   // positive tests
45   std::istream::sentry sentry03(istr02);
46   VERIFY( bool(sentry03) == true );
47 
48   std::istream::sentry sentry04(istr02, true);
49   VERIFY( bool(sentry04) == true );
50 }
51 
main()52 int main()
53 {
54   test01();
55   return 0;
56 }
57