Sophie: octave-doc-0:5.1.0-7.1.mga7 noarch

octave-doc-5.1.0-7.1.mga7.noarch.rpm

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<!-- Created by GNU Texinfo 6.5, http://www.gnu.org/software/texinfo/ -->
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Parser (GNU Octave (version 5.1.0))</title>

<meta name="description" content="Parser (GNU Octave (version 5.1.0))">
<meta name="keywords" content="Parser (GNU Octave (version 5.1.0))">
<meta name="resource-type" content="document">
<meta name="distribution" content="global">
<meta name="Generator" content="makeinfo">
<link href="index.html#Top" rel="start" title="Top">
<link href="Concept-Index.html#Concept-Index" rel="index" title="Concept Index">
<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
<link href="Grammar-and-Parser.html#Grammar-and-Parser" rel="up" title="Grammar and Parser">
<link href="Copying.html#Copying" rel="next" title="Copying">
<link href="Keywords.html#Keywords" rel="prev" title="Keywords">
<style type="text/css">
<!--
a.summary-letter {text-decoration: none}
blockquote.indentedblock {margin-right: 0em}
blockquote.smallindentedblock {margin-right: 0em; font-size: smaller}
blockquote.smallquotation {font-size: smaller}
div.display {margin-left: 3.2em}
div.example {margin-left: 3.2em}
div.lisp {margin-left: 3.2em}
div.smalldisplay {margin-left: 3.2em}
div.smallexample {margin-left: 3.2em}
div.smalllisp {margin-left: 3.2em}
kbd {font-style: oblique}
pre.display {font-family: inherit}
pre.format {font-family: inherit}
pre.menu-comment {font-family: serif}
pre.menu-preformatted {font-family: serif}
pre.smalldisplay {font-family: inherit; font-size: smaller}
pre.smallexample {font-size: smaller}
pre.smallformat {font-family: inherit; font-size: smaller}
pre.smalllisp {font-size: smaller}
span.nolinebreak {white-space: nowrap}
span.roman {font-family: initial; font-weight: normal}
span.sansserif {font-family: sans-serif; font-weight: normal}
ul.no-bullet {list-style: none}
-->
</style>
<link rel="stylesheet" type="text/css" href="octave.css">


</head>

<body lang="en">
<a name="Parser"></a>
<div class="header">
<p>
Previous: <a href="Keywords.html#Keywords" accesskey="p" rel="prev">Keywords</a>, Up: <a href="Grammar-and-Parser.html#Grammar-and-Parser" accesskey="u" rel="up">Grammar and Parser</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Concept-Index.html#Concept-Index" title="Index" rel="index">Index</a>]</p>
</div>
<hr>
<a name="Parser-1"></a>
<h3 class="section">F.2 Parser</h3>
<a name="index-parser"></a>

<p>The parser has a number of variables that affect its internal operation.
These variables are generally documented in the manual alongside the code that
they affect.
</p>
<p>In addition, there are three non-specific parser customization functions.
<code>add_input_event_hook</code> can be used to schedule a user function for
periodic evaluation.  <code>remove_input_event_hook</code> will stop a user function
from being evaluated periodically.
</p>
<a name="XREFadd_005finput_005fevent_005fhook"></a><dl>
<dt><a name="index-add_005finput_005fevent_005fhook"></a><em><var>id</var> =</em> <strong>add_input_event_hook</strong> <em>(<var>fcn</var>)</em></dt>
<dt><a name="index-add_005finput_005fevent_005fhook-1"></a><em><var>id</var> =</em> <strong>add_input_event_hook</strong> <em>(<var>fcn</var>, <var>data</var>)</em></dt>
<dd><p>Add the named function or function handle <var>fcn</var> to the list of functions
to call periodically when Octave is waiting for input.
</p>
<p>The function should have the form
</p>
<div class="example">
<pre class="example"><var>fcn</var> (<var>data</var>)
</pre></div>

<p>If <var>data</var> is omitted, Octave calls the function without any arguments.
</p>
<p>The returned identifier may be used to remove the function handle from the
list of input hook functions.
</p>
<p><strong>See also:</strong> <a href="#XREFremove_005finput_005fevent_005fhook">remove_input_event_hook</a>.
</p></dd></dl>


<a name="XREFremove_005finput_005fevent_005fhook"></a><dl>
<dt><a name="index-remove_005finput_005fevent_005fhook"></a><em></em> <strong>remove_input_event_hook</strong> <em>(<var>name</var>)</em></dt>
<dt><a name="index-remove_005finput_005fevent_005fhook-1"></a><em></em> <strong>remove_input_event_hook</strong> <em>(<var>fcn_id</var>)</em></dt>
<dd><p>Remove the named function or function handle with the given identifier
from the list of functions to call periodically when Octave is waiting
for input.
</p>
<p><strong>See also:</strong> <a href="#XREFadd_005finput_005fevent_005fhook">add_input_event_hook</a>.
</p></dd></dl>


<p>Finally, when the parser cannot identify an input token it calls a particular
function to handle this.  By default, this is the internal function
<code>&quot;__unimplemented__&quot;</code> which makes suggestions about possible Octave
substitutes for <small>MATLAB</small> functions.
</p>
<a name="XREFmissing_005ffunction_005fhook"></a><dl>
<dt><a name="index-missing_005ffunction_005fhook"></a><em><var>val</var> =</em> <strong>missing_function_hook</strong> <em>()</em></dt>
<dt><a name="index-missing_005ffunction_005fhook-1"></a><em><var>old_val</var> =</em> <strong>missing_function_hook</strong> <em>(<var>new_val</var>)</em></dt>
<dt><a name="index-missing_005ffunction_005fhook-2"></a><em></em> <strong>missing_function_hook</strong> <em>(<var>new_val</var>, &quot;local&quot;)</em></dt>
<dd><p>Query or set the internal variable that specifies the function to call when
an unknown identifier is requested.
</p>
<p>When called from inside a function with the <code>&quot;local&quot;</code> option, the
variable is changed locally for the function and any subroutines it calls.
The original variable value is restored when exiting the function.
</p>
<p><strong>See also:</strong> <a href="Missing-Components.html#XREFmissing_005fcomponent_005fhook">missing_component_hook</a>.
</p></dd></dl>



<hr>
<div class="header">
<p>
Previous: <a href="Keywords.html#Keywords" accesskey="p" rel="prev">Keywords</a>, Up: <a href="Grammar-and-Parser.html#Grammar-and-Parser" accesskey="u" rel="up">Grammar and Parser</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Concept-Index.html#Concept-Index" title="Index" rel="index">Index</a>]</p>
</div>



</body>
</html>