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<h3><a href="../../../../index.htm"><img height="86" width="277" alt="C++ Boost" src="../../../../c++boost.gif" border="0"></a></h3>
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<h1 align="center">Boost.Preprocessor</h1>
<h2 align="center">Reference</h2>
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<h1>#include <<a href="../../../../boost/preprocessor/comma_if.hpp">boost/preprocessor/comma_if.hpp</a>></h1>
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<h2><a name="BOOST_PP_COMMA_IF">#define BOOST_PP_COMMA_IF</a>(C)</h2>
<p>Expands to a comma if <code>C != 0</code> and nothing if
<code>C == 0</code>.</p>
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<h2><a name="BOOST_PREPROCESSOR_COMMA_IF">#define BOOST_PREPROCESSOR_COMMA_IF</a>(C)</h2>
<p>Obsolete. Use <a href="comma_if.htm#BOOST_PP_COMMA_IF">BOOST_PP_COMMA_IF</a>().</p>
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