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	<title>BOOST_PP_EXPR_IF</title>
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		The <b>BOOST_PP_EXPR_IF</b> macro expands to its second argument if its first argument is non-zero or expands to nothing otherwise.
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	<h4>Usage</h4>
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			<b>BOOST_PP_EXPR_IF</b>(<i>cond</i>, <i>expr</i>)
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	<h4>Arguments</h4>
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			<dt>cond</dt>
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				The condition that determines if the result is <i>expr</i