| //===----------------------------------------------------------------------===// |
| // |
| // 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; |
| } |