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//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// <ostream>
// template <class charT, class traits = char_traits<charT> >
// class basic_ostream;
// template <class charT, class traits>
// basic_ostream<charT,traits>& flush(basic_ostream<charT,traits>& os);
#include <ostream>
#include <cassert>
int sync_called = 0;
template <class CharT>
class testbuf
: public std::basic_streambuf<CharT>
{
public:
testbuf()
{
}
protected:
virtual int
sync()
{
++sync_called;
return 0;
}
};
int main()
{
{
testbuf<char> sb;
std::ostream os(&sb);
flush(os);
assert(sync_called == 1);
assert(os.good());
}
{
testbuf<wchar_t> sb;
std::wostream os(&sb);
flush(os);
assert(sync_called == 2);
assert(os.good());
}
}
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