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// 2001-05-21 Benjamin Kosnik <bkoz@redhat.com>
// Copyright (C) 2001-2018 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library. This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 3, or (at your option)
// any later version.
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License along
// with this library; see the file COPYING3. If not see
// <http://www.gnu.org/licenses/>.
// 27.8.1.4 Overridden virtual functions
// { dg-require-fileio "" }
#include <fstream>
#include <testsuite_hooks.h>
#include <testsuite_io.h>
// @require@ %-*.tst %-*.txt
// @diff@ %-*.tst %*.txt
const char name_01[] = "tmp_sputbackc_2out.tst"; // empty file, need to create
// Test overloaded virtual functions.
void test01()
{
using namespace std;
using namespace __gnu_test;
typedef std::filebuf::int_type int_type;
typedef filebuf::traits_type traits_type;
int_type c1, c2;
// int_type sputbackc(char_type c)
// if in_cur not avail || ! traits::eq(c, gptr() [-1]), return pbfail
// otherwise decrements in_cur and returns *gptr()
// out
{
constraint_filebuf fb_01; // out
fb_01.pubsetbuf(0, 0);
fb_01.open(name_01, ios::out | ios::trunc);
VERIFY( fb_01.unbuffered() );
VERIFY( !fb_01.read_position() );
c1 = fb_01.sgetc();
VERIFY( c1 == traits_type::eof() );
c2 = fb_01.sputbackc('a');
VERIFY( c2 == traits_type::eof() );
fb_01.sbumpc();
c1 = fb_01.sbumpc();
c2 = fb_01.sputbackc('a');
VERIFY( c1 == c2 );
VERIFY( fb_01.unbuffered() );
VERIFY( !fb_01.read_position() );
}
}
int main()
{
test01();
return 0;
}
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