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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::sentry;
// ~sentry();
#include <ostream>
#include <cassert>
#include "test_macros.h"
int sync_called = 0;
template <class CharT>
struct testbuf1
: public std::basic_streambuf<CharT>
{
testbuf1() {}
protected:
int virtual sync()
{
++sync_called;
return 1;
}
};
int main(int, char**)
{
{
std::ostream os((std::streambuf*)0);
std::ostream::sentry s(os);
assert(!bool(s));
}
assert(sync_called == 0);
{
testbuf1<char> sb;
std::ostream os(&sb);
std::ostream::sentry s(os);
assert(bool(s));
}
assert(sync_called == 0);
{
testbuf1<char> sb;
std::ostream os(&sb);
std::ostream::sentry s(os);
assert(bool(s));
unitbuf(os);
}
assert(sync_called == 1);
#ifndef TEST_HAS_NO_EXCEPTIONS
{
testbuf1<char> sb;
std::ostream os(&sb);
try
{
std::ostream::sentry s(os);
assert(bool(s));
unitbuf(os);
throw 1;
}
catch (...)
{
}
assert(sync_called == 1);
}
#endif
return 0;
}
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