<html> <head> <title>BOOST_PP_RPAREN_IF</title> <link rel="stylesheet" type="text/css" href="../styles.css"> </head> <body> <div style="margin-left: 0px;"> The <b>BOOST_PP_RPAREN_IF</b> macro conditionally expands to a right parenthesis. </div> <h4>Usage</h4> <div class="code"> <b>BOOST_PP_RPAREN_IF</b>(<i>cond</i>) </div> <h4>Arguments</h4> <dl> <dt>cond</dt> <dd> The condition that determines if a the macro expands to a right parenthesis or nothing. Valid values range from <i>0</i> to <b>BOOST_PP_LIMIT_MAG</b>. </dd> </dl> <h4>Remarks</h4> <div> If <i>cond</i> expands to <i>0</i>, this macro expands to nothing. Otherwise, it expands to a right parenthesis. </div> <div> The preprocessor interprets parentheses as delimiters in macro invocations. Because of this, parentheses require special handling. </div> <h4>See Also</h4> <ul> <li><a href="limit_mag.html">BOOST_PP_LIMIT_MAG</a></li> <li><a href="lparen_if.html">BOOST_PP_LPAREN_IF</a></li> </ul> <h4>Requirements</h4> <div> <b>Header:</b> <a href="../headers/punctuation/paren_if.hpp.html"><boost/preprocessor/punctuation/paren_if.hpp></a> </div> <h4>Sample Code</h4> <div><pre> #include <<a href="../headers/punctuation/paren_if.hpp.html">boost/preprocessor/punctuation/paren_if.hpp</a>> #define MACRO(c, x) <a href="lparen_if.html">BOOST_PP_LPAREN_IF</a>(c) x <a href="rparen_if.html">BOOST_PP_RPAREN_IF</a>(c) MACRO(0, text) // expands to text MACRO(1, text) // expands to (text) </pre></div> </body> </html>
