76 lines
1.5 KiB
C++
76 lines
1.5 KiB
C++
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//===----------------------------------------------------------------------===//
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//
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// <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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// <ostream>
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// template <class charT, class traits = char_traits<charT> >
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// class basic_ostream::sentry;
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// ~sentry();
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#include <ostream>
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#include <cassert>
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int sync_called = 0;
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template <class CharT>
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struct testbuf1
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: public std::basic_streambuf<CharT>
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{
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testbuf1() {}
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protected:
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int virtual sync()
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{
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++sync_called;
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return 1;
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}
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};
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int main()
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{
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{
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std::ostream os((std::streambuf*)0);
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std::ostream::sentry s(os);
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assert(!bool(s));
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}
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assert(sync_called == 0);
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{
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testbuf1<char> sb;
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std::ostream os(&sb);
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std::ostream::sentry s(os);
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assert(bool(s));
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}
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assert(sync_called == 0);
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{
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testbuf1<char> sb;
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std::ostream os(&sb);
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std::ostream::sentry s(os);
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assert(bool(s));
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unitbuf(os);
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}
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assert(sync_called == 1);
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{
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testbuf1<char> sb;
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std::ostream os(&sb);
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try
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{
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std::ostream::sentry s(os);
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assert(bool(s));
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unitbuf(os);
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throw 1;
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}
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catch (...)
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{
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}
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assert(sync_called == 1);
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}
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}
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