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| <h2><span class="refentrytitle">Struct once_block_flag</span></h2> |
| <p>boost::log::once_block_flag — A flag to detect if a code block has already been executed. </p> |
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| <h2 xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv-title">Synopsis</h2> |
| <div xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv"><pre class="synopsis"><span class="comment">// In header: <<a class="link" href="../../utilities.html#header.boost.log.utility.once_block_hpp" title="Header <boost/log/utility/once_block.hpp>">boost/log/utility/once_block.hpp</a>> |
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| <span class="keyword">struct</span> <a class="link" href="once_block_flag.html" title="Struct once_block_flag">once_block_flag</a> <span class="special">{</span> |
| <span class="special">}</span><span class="special">;</span></pre></div> |
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| <a name="idp132665872"></a><h2>Description</h2> |
| <p>This structure should be used in conjunction with the <code class="computeroutput">BOOST_LOG_ONCE_BLOCK_FLAG</code> macro. Usage example:</p> |
| <p><code class="computeroutput"> <a class="link" href="once_block_flag.html" title="Struct once_block_flag">once_block_flag</a> flag = BOOST_LOG_ONCE_BLOCK_INIT;</code></p> |
| <p><code class="computeroutput">void foo() { BOOST_LOG_ONCE_BLOCK_FLAG(flag) { puts("Hello, world once!"); } } </code> </p> |
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| <td align="right"><div class="copyright-footer">Copyright © 2007-2015 Andrey |
| Semashev<p> |
| Distributed under the Boost Software License, Version 1.0. (See accompanying |
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