autodoc.git
/
modref
/
ex
/
cpp_3A_3A
/
_23if.html
version
»
Context lines:
10
20
40
80
file
none
3
autodoc.git/modref/ex/cpp_3A_3A/_23if.html:1:
+
<html>
+
<head>
+
<title>Pike Reference Manual - #if</title>
+
<link rel='stylesheet' href='../../style.css' />
+
<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 link="#0768b2" alink="#002040" vlink="#0768b2">
+
<header>
+
<div>
+
<div style="text-align:right;">Extracted from as of .</div>
+
<div style="overflow:hidden;">
+
<a href="http://pike.lysator.liu.se/"
+
style="float:left; width:181px; height:41px; margin:10px;
+
margin-left:22px; margin-right:25px;
+
background-image:url('../../../images/pike_logo.gif');"></a>
+
<div style="margin:10px; height:11px;
+
margin-top:26px; margin-right:19px;
+
overflow:hidden;
+
background-image:url('../../../images/pike_line_middle.gif');">
+
<span style="float:left; width:5px; height:11px;
+
background-image:url('../../../images/pike_line_left.gif');"> </span>
+
<span style="float:right; width:5px; height:11px;
+
background-image:url('../../../images/pike_line_right.gif');"> </span>
+
</div>
+
</div>
+
</div>
+
</header>
+
+
<div>
+
<div class="navbar">
+
<nav>
+
<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>
+
+
</nav>
+
</div>
+
<div class="navbox">
+
<nav>
+
<div class="sidebar">
+
<a href="../../ex/cpp_3A_3A/_23error.html" class="left"
+
><img src="../../../images/prev.gif" hspace="3"
+
border="0" alt="previous"
+
>#error</a>
+
<a href="../../ex/cpp_3A_3A/_23ifdef.html" class="right"
+
>#ifdef<img src="../../../images/next.gif" hspace="3"
+
border="0" alt="next"
+
></a>
+
</div>
+
</nav>
+
</div>
+
<div class="contentbox">
+
<article>
+
<h1>Directive #if</h1>
+
+
+
<hr />
+
<dl class='group--doc'>
+
<dt class='head--type'><span class='homogen--type'>Directive</span>
+
<span class='homogen--name'><b>#if</b></span>
+
</dt>
+
<dd><p><code class='directive'>#if</code></p></dd>
+
+
<dt class='head--doc'>Description</dt>
+
<dd class='body--doc'><p>The <a class='ms reference' href='../cpp_3A_3A.html'>#if</a> directive can evaluate simple expressions and, if
+
the expression is evaluates to true, "activate" the code block that
+
follows. The code block ends when an <a class='ms reference' href='../cpp_3A_3A.html'>#endif</a>, <a class='ms reference' href='../cpp_3A_3A.html'>#else</a>,
+
<a class='ms reference' href='../cpp_3A_3A.html'>#elseif</a> or <a class='ms reference' href='../cpp_3A_3A.html'>#elif</a> block is encountered at the same
+
nesting depth.</p>
+
<p> The <a class='ms reference' href='../cpp_3A_3A.html'>#if</a> expressions may include defines, integer, string
+
and float constants, <tt>?:</tt>, <tt>||</tt> and <tt>&&</tt> operations,
+
<tt>~</tt>, <tt>^</tt>, <tt>!</tt>, <tt>|</tt> and <tt>&</tt> operations,
+
<tt><</tt>, <tt>></tt>, <tt><=</tt>, <tt>>=</tt>, <tt>==</tt> and <tt>!=</tt> operations,
+
<tt>+</tt>, <tt>-</tt>, <tt>*</tt>, <tt>/</tt>, <tt><<</tt> and <tt>>></tt> operations
+
and paranthesis.</p>
+
<p> Strings may also be indexed with the <tt>[]</tt> index operator.
+
Finally there are three special "functions" available in <a class='ms reference' href='../cpp_3A_3A.html'>#if</a>
+
expressions; <a class='ms reference' href='../cpp_3A_3A/defined.html'>defined()</a>, <a class='ms reference' href='../cpp_3A_3A/efun.html'>efun()</a> and <a class='ms reference' href='../cpp_3A_3A/constant.html'>constant()</a>.</p>
+
</dd>
+
<dt class='head--doc'>See also</dt>
+
<dd class='body--doc'><p><a class='ms reference' href='../cpp_3A_3A.html'>#ifdef</a>, <a class='ms reference' href='../cpp_3A_3A.html'>#ifndef</a>, <a class='ms reference' href='../cpp_3A_3A.html'>#elif</a>, <a class='ms reference' href='../cpp_3A_3A.html'>#else</a>, <a class='ms reference' href='../cpp_3A_3A.html'>#endif</a>,
+
<a class='ms reference' href='../cpp_3A_3A/defined.html'>defined()</a>, <a class='ms reference' href='../cpp_3A_3A/constant.html'>constant()</a>, <a class='ms reference' href='../cpp_3A_3A/efun.html'>efun()</a></p>
+
</dd></dl>
+
+
</article>
+
<footer>
+
<hr size="1" noshade="1" />
+
</footer>
+
</div>
+
</div>
+
</body>
+
<script>PikeDoc.current = {"link":"ex/cpp_3A_3A/_23if.html","name":"#if"};</script>
+
<script src='../../ex/cpp_3A_3A/index.js'></script>
+
<script src='../../ex/cpp_3A_3A/load_index.js'></script>
+
</html>
Newline at end of file added.