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git.ipfire.org Git - thirdparty/gcc.git/blob - libstdc++-v3/testsuite/27_io/basic_filebuf/sputbackc/char/1-out.cc
1 // 2001-05-21 Benjamin Kosnik <bkoz@redhat.com>
3 // Copyright (C) 2001-2014 Free Software Foundation, Inc.
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)
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.
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/>.
20 // 27.8.1.4 Overridden virtual functions
22 // { dg-require-fileio "" }
25 #include <testsuite_hooks.h>
26 #include <testsuite_io.h>
28 // @require@ %-*.tst %-*.txt
29 // @diff@ %-*.tst %*.txt
31 const char name_01
[] = "tmp_sputbackc_1out.tst"; // empty file, need to create
33 // Test overloaded virtual functions.
37 using namespace __gnu_test
;
38 typedef std::filebuf::int_type int_type
;
39 typedef filebuf::traits_type traits_type
;
41 bool test
__attribute__((unused
)) = true;
44 // int_type sputbackc(char_type c)
45 // if in_cur not avail || ! traits::eq(c, gptr() [-1]), return pbfail
46 // otherwise decrements in_cur and returns *gptr()
50 constraint_filebuf fb_01
; // out
51 fb_01
.open(name_01
, ios::out
| ios::trunc
);
52 VERIFY( !fb_01
.write_position() );
53 VERIFY( !fb_01
.read_position() );
55 VERIFY( c1
== traits_type::eof() );
56 c2
= fb_01
.sputbackc('a');
57 VERIFY( c2
== traits_type::eof() );
60 c2
= fb_01
.sputbackc('a');
62 VERIFY( !fb_01
.write_position() );
63 VERIFY( !fb_01
.read_position() );