1bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant//===----------------------------------------------------------------------===// 2bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant// 3f5256e16dfc425c1d466f6308d4026d529ce9e0bHoward Hinnant// The LLVM Compiler Infrastructure 4bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant// 5b64f8b07c104c6cc986570ac8ee0ed16a9f23976Howard Hinnant// This file is dual licensed under the MIT and the University of Illinois Open 6b64f8b07c104c6cc986570ac8ee0ed16a9f23976Howard Hinnant// Source Licenses. See LICENSE.TXT for details. 7bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant// 8bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant//===----------------------------------------------------------------------===// 9bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 10bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant// <ostream> 11bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 12bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant// template <class charT, class traits = char_traits<charT> > 13bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant// class basic_ostream::sentry; 14bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 15bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant// explicit sentry(basic_ostream<charT,traits>& os); 16bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 17bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant#include <ostream> 18bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant#include <cassert> 19bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 20bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnantint sync_called = 0; 21bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 22bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnanttemplate <class CharT> 23bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnantstruct testbuf1 24bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant : public std::basic_streambuf<CharT> 25bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant{ 26bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant testbuf1() {} 27bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 28bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnantprotected: 29bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 30bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant int virtual sync() 31bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant { 32bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant ++sync_called; 33bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant return 1; 34bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant } 35bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant}; 36bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 37bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnantint main() 38bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant{ 39bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant { 40bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant std::ostream os((std::streambuf*)0); 41bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant std::ostream::sentry s(os); 42bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(!bool(s)); 43bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant } 44bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant { 45bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant testbuf1<char> sb; 46bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant std::ostream os(&sb); 47bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant std::ostream::sentry s(os); 48bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(bool(s)); 49bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant } 50bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant { 51bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant testbuf1<char> sb; 52bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant std::ostream os(&sb); 53bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant testbuf1<char> sb2; 54bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant std::ostream os2(&sb2); 55bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant os.tie(&os2); 56bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(sync_called == 0); 57bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant std::ostream::sentry s(os); 58bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(bool(s)); 59bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(sync_called == 1); 60bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant } 61bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant} 62