64 lines · cpp
1//===----------------------------------------------------------------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8 9// <ostream>10 11// template <class charT, class traits = char_traits<charT> >12// class basic_ostream;13 14// template <class charT, class traits>15// basic_ostream<charT,traits>& flush(basic_ostream<charT,traits>& os);16 17#include <ostream>18#include <cassert>19 20#include "test_macros.h"21 22int sync_called = 0;23 24template <class CharT>25class testbuf26 : public std::basic_streambuf<CharT>27{28public:29 testbuf()30 {31 }32 33protected:34 35 virtual int36 sync()37 {38 ++sync_called;39 return 0;40 }41};42 43int main(int, char**)44{45 {46 testbuf<char> sb;47 std::ostream os(&sb);48 std::flush(os);49 assert(sync_called == 1);50 assert(os.good());51 }52#ifndef TEST_HAS_NO_WIDE_CHARACTERS53 {54 testbuf<wchar_t> sb;55 std::wostream os(&sb);56 std::flush(os);57 assert(sync_called == 2);58 assert(os.good());59 }60#endif61 62 return 0;63}64