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| author | Steve M. Robbins <smr@debian.org> | 2011-10-22 04:54:51 +0200 |
|---|---|---|
| committer | Steve M. Robbins <smr@debian.org> | 2011-10-22 04:54:51 +0200 |
| commit | dd657ad3f1428b026486db3ec36691df17ddf515 (patch) | |
| tree | 6ffb465595479fb5a76c1a6ea3ec992abaa8c1c1 /docsrc/xlisp/xlisp-doc/reference/fboundp.htm | |
Import nyquist_3.05.orig.tar.gz
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diff --git a/docsrc/xlisp/xlisp-doc/reference/fboundp.htm b/docsrc/xlisp/xlisp-doc/reference/fboundp.htm new file mode 100644 index 0000000..cc014f8 --- /dev/null +++ b/docsrc/xlisp/xlisp-doc/reference/fboundp.htm @@ -0,0 +1,84 @@ +<html><head><title>XLISP fboundp</title>
+
+<link rel="stylesheet" type="text/css" href="reference.css">
+
+</head>
+
+<body>
+
+<a href="../start.htm">Nyquist / XLISP 2.0</a> -
+<a href="../manual/contents.htm">Contents</a> |
+<a href="../tutorials/tutorials.htm">Tutorials</a> |
+<a href="../examples/examples.htm">Examples</a> |
+<a href="reference-index.htm">Reference</a>
+
+<hr>
+
+<h1>fboundp</h1>
+
+<hr>
+
+<p><table cellpadding="0" cellspacing="0" style="margin-left:10px"><tbody>
+<tr valign="top">
+ <td><nobr>Type:</nobr></td>
+ <td><nobr> - </nobr></td>
+ <td width="100%"><nobr>predicate function (subr)</nobr></td>
+</tr>
+<tr valign="top">
+ <td><nobr>Source:</nobr></td>
+ <td><nobr> - </nobr></td>
+ <td width="100%"><nobr>xlbfun.c</nobr></td>
+</tr>
+</tbody></table></p>
+
+<h2>Syntax</h2>
+
+<dl>
+<dt>(fboundp <i>symbol</i>)</dt>
+<dd><i>symbol</i> - the symbol expression to check for a value<br>
+returns - <a href="t.htm"> T </a> if a functional
+value is bound to the symbol, <a href="nil.htm">NIL</a>
+otherwise</dd>
+</dl>
+
+<h2>Description</h2>
+
+<p>The 'fboundp' predicate function checks to see if 'symbol' is a symbol
+with a function definition bound to it.
+<a href="t.htm"> T </a> is returned if 'symbol' has a
+function value, <a href="nil.htm">NIL</a> is returned otherwise.
+Note that 'symbol' is a symbol expression, it is evaluated and the resulting
+expression is the one that is checked.</p>
+
+<h2>Examples</h2>
+
+<pre class="example">
+(defun foo (x) (print x)) <font color="#008844">; set up function FOO</font>
+(fboundp 'foo) <font color="#008844">; returns T - FOO is closure</font>
+(fboundp 'car) <font color="#008844">; returns T - CAR is subr</font>
+
+(setq myvar 'goo) <font color="#008844">; set up MYVAR to have value GOO</font>
+(fboundp myvar) <font color="#008844">; returns NIL - because GOO has no value yet</font>
+(defmacro goo () (print "hi")) <font color="#008844">; define GOO macro</font>
+(fboundp myvar) <font color="#008844">; returns T</font>
+
+(fboundp 'a) <font color="#008844">; returns NIL</font>
+(fboundp '1) <font color="#008844">; error: bad argument type - 1</font>
+(fboundp "hi") <font color="#008844">; error: bad argument type - "hi"</font>
+</pre>
+
+<p>See the
+<a href="../manual/xlisp-man-018.htm#fboundp">fboundp</a>
+predicate function in the <nobr>XLISP 2.0</nobr> manual.</p>
+
+<p><nobr> <a href="#top">Back to Top</nobr></a></p>
+
+<hr>
+
+<a href="../start.htm">Nyquist / XLISP 2.0</a> -
+<a href="../manual/contents.htm">Contents</a> |
+<a href="../tutorials/tutorials.htm">Tutorials</a> |
+<a href="../examples/examples.htm">Examples</a> |
+<a href="reference-index.htm">Reference</a>
+
+</body></html>
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