6f5f612018-09-12Henrik Grubbström (Grubba) <!doctype html> <html> <head> <meta content="width=device-width, initial-scale=1" name="viewport"> <meta charset="utf-8"> <title>defined() - Pike Reference Manual</title> <!-- 221--> <link rel='stylesheet' href='../../style.css'> <script src='../../site.js'></script> <script src='../../constants.js'></script> <script>PikeDoc.NO_DYNAMIC = true;</script> <style type='text/css'> svg line { stroke:#343434; stroke-width:2; } svg text { fill:#343434; } svg a { fill:#0768b2; text-decoration: underline; } </style> </head> <body> <header> <div class="header"> <div id="version"><strong data-id="version"></strong></div> <button id="burger"> <span class="bar"></span> <span class="bar"></span> <span class="bar"></span> <span class="bar"></span> </button><!-- Hamburger icon --> <h1> <a href="http://pike.lysator.liu.se/" class="logo"> <span>Pike programming language</span> </a> </h1> </div> </header> <div id="page"> <div class="navbar"> <nav> <div class="inner" id="navbar"> <a href='../../index.html'><b class='top head'>Top</b></a> <a href='../../ex/cpp_3A_3A.html'><b class='head'>cpp::</b></a> <script></script> <noscript> <div class='sidebar'> <a href='../../ex/cpp_3A_3A/index.html'><b>Symbol index</b></a><br /> </div> </noscript> </div> </nav> </div> <div class="content"> <div class="navbox"> <nav> <div class="sidebar"> <a href="../../ex/cpp_3A_3A/constant.html" class="prev"><span>&#10148;</span> constant()</a> <a href="../../ex/cpp_3A_3A/efun.html" class="next">efun() <span>&#10148;</span></a> </div> </nav> </div> <div class="contentbox"> <article> <h1>Method defined()</h1> <hr /> <dl class='group--doc'> <dt class='head--type'><span class='homogen--type'>Method</span> <span class='homogen--name'><b>defined</b></span> </dt> <dd><p><code><code class='datatype'>bool</code> <b><span class='method'>defined</span>(</b><code class='datatype'>mixed</code> <code class='argument'>identifier</code><b>)</b></code></p></dd> <dt class='head--doc'>Description</dt> <dd class='body--doc'><p>Check whether an identifier is a cpp macro or not.</p> </dd> <dt class='head--doc'>Returns</dt> <dd class='body--doc'><p><a class='ms reference' href='../cpp_3A_3A/defined.html'>defined</a> returns true if the symbol given as argument is defined.</p> </dd> <dt class='head--doc'>Note</dt> <dd class='body--doc'><p><tt>#if defined(MY_DEF)</tt> is equivalent to <tt>#ifdef MY_DEF</tt>.</p> </dd> <dt class='head--doc'>See also</dt> <dd class='body--doc'><p><a class='ms reference' href='../cpp_3A_3A/defined.html'>#if</a>, <a class='ms reference' href='../cpp_3A_3A/defined.html'>#ifdef</a>, <a class='ms reference' href='../cpp_3A_3A/constant.html'>constant()</a></p> </dd></dl> </article> </div> </div> </div> <footer> <div id="build-date">Extracted from <strong data-id="version"></strong> as of <strong data-id="date" data-timestamp=""></strong>.</div> </footer> <script>PikeDoc.current = {"link":"ex/cpp_3A_3A/defined.html","name":"defined"};</script> <script src='../../ex/cpp_3A_3A/index.js'></script> <script src='../../ex/cpp_3A_3A/load_index.js'></script> <script> // Tell PikeDoc that next actions are from loaded scripts PikeDoc.isInline = false; </script> </body> </html>