| 1 | /* |
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| 2 | Copyright 2019-2020 Glen Joseph Fernandes |
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| 3 | (glenjofe@gmail.com) |
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| 4 | |
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| 5 | Distributed under the Boost Software License, Version 1.0. |
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| 6 | (http://www.boost.org/LICENSE_1_0.txt) |
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| 7 | */ |
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| 8 | #ifndef BOOST_IO_DETAIL_OSTREAM_GUARD_HPP |
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| 9 | #define BOOST_IO_DETAIL_OSTREAM_GUARD_HPP |
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| 10 | |
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| 11 | #include <boost/config.hpp> |
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| 12 | #include <iosfwd> |
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| 13 | |
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| 14 | namespace boost { |
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| 15 | namespace io { |
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| 16 | namespace detail { |
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| 17 | |
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| 18 | template<class Char, class Traits> |
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| 19 | class ostream_guard { |
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| 20 | public: |
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| 21 | explicit ostream_guard(std::basic_ostream<Char, Traits>& os) BOOST_NOEXCEPT |
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| 22 | : os_(&os) { } |
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| 23 | |
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| 24 | ~ostream_guard() BOOST_NOEXCEPT_IF(false) { |
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| 25 | if (os_) { |
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| 26 | os_->setstate(std::basic_ostream<Char, Traits>::badbit); |
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| 27 | } |
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| 28 | } |
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| 29 | |
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| 30 | void release() BOOST_NOEXCEPT { |
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| 31 | os_ = 0; |
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| 32 | } |
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| 33 | |
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| 34 | private: |
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| 35 | ostream_guard(const ostream_guard&); |
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| 36 | ostream_guard& operator=(const ostream_guard&); |
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| 37 | |
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| 38 | std::basic_ostream<Char, Traits>* os_; |
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| 39 | }; |
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| 40 | |
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| 41 | } /* detail */ |
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| 42 | } /* io */ |
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| 43 | } /* boost */ |
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| 44 | |
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| 45 | #endif |
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| 46 | |
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