| 1 | //===----------------------------------------------------------------------===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | |
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| 9 | // <ostream> |
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| 10 | |
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| 11 | // template <class charT, class traits = char_traits<charT> > |
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| 12 | // class basic_ostream; |
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| 13 | |
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| 14 | // basic_ostream& flush(); |
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| 15 | |
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| 16 | #include <ostream> |
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| 17 | #include <cassert> |
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| 18 | |
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| 19 | #include "test_macros.h" |
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| 20 | |
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| 21 | int sync_called = 0; |
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| 22 | |
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| 23 | template <class CharT> |
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| 24 | class testbuf |
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| 25 | : public std::basic_streambuf<CharT> |
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| 26 | { |
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| 27 | public: |
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| 28 | testbuf() |
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| 29 | { |
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| 30 | } |
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| 31 | |
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| 32 | protected: |
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| 33 | |
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| 34 | virtual int |
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| 35 | sync() |
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| 36 | { |
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| 37 | if (sync_called++ == 1) |
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| 38 | return -1; |
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| 39 | return 0; |
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| 40 | } |
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| 41 | }; |
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| 42 | |
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| 43 | int main(int, char**) |
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| 44 | { |
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| 45 | { |
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| 46 | testbuf<char> sb; |
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| 47 | std::ostream os(&sb); |
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| 48 | os.flush(); |
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| 49 | assert(os.good()); |
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| 50 | assert(sync_called == 1); |
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| 51 | os.flush(); |
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| 52 | assert(os.bad()); |
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| 53 | assert(sync_called == 2); |
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| 54 | } |
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| 55 | |
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| 56 | return 0; |
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| 57 | } |
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| 58 | |
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