1 //===----------------------------------------------------------------------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is dual licensed under the MIT and the University of Illinois Open 6 // Source Licenses. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 // <ostream> 11 12 // template <class charT, class traits = char_traits<charT> > 13 // class basic_ostream::sentry; 14 15 // ~sentry(); 16 17 #include <ostream> 18 #include <cassert> 19 20 int sync_called = 0; 21 22 template <class CharT> 23 struct testbuf1 24 : public std::basic_streambuf<CharT> 25 { 26 testbuf1() {} 27 28 protected: 29 30 int virtual sync() 31 { 32 ++sync_called; 33 return 1; 34 } 35 }; 36 37 int main() 38 { 39 { 40 std::ostream os((std::streambuf*)0); 41 std::ostream::sentry s(os); 42 assert(!bool(s)); 43 } 44 assert(sync_called == 0); 45 { 46 testbuf1<char> sb; 47 std::ostream os(&sb); 48 std::ostream::sentry s(os); 49 assert(bool(s)); 50 } 51 assert(sync_called == 0); 52 { 53 testbuf1<char> sb; 54 std::ostream os(&sb); 55 std::ostream::sentry s(os); 56 assert(bool(s)); 57 unitbuf(os); 58 } 59 assert(sync_called == 1); 60 { 61 testbuf1<char> sb; 62 std::ostream os(&sb); 63 try 64 { 65 std::ostream::sentry s(os); 66 assert(bool(s)); 67 unitbuf(os); 68 throw 1; 69 } 70 catch (...) 71 { 72 } 73 assert(sync_called == 1); 74 } 75 } 76
