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<p>
Next: <a href="option-attributes.html#option-attributes" accesskey="n" rel="next">option attributes</a>, Previous: <a href="information-attributes.html#information-attributes" accesskey="p" rel="prev">information attributes</a>, Up: <a href="Option-Definitions.html#Option-Definitions" accesskey="u" rel="up">Option Definitions</a> [<a href="Function-Index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="AutoOpts.html#AutoOpts" title="Index" rel="index">Index</a>]</p>
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<a name="Generating-main-procedures"></a>
<h4 class="subsection">7.5.4 Generating main procedures</h4>
<a name="index-main-procedure"></a>
<p>When AutoOpts generates the code to parse the command line options, it has
the ability to produce any of several types of <code>main()</code> procedures.
This is done by specifying a global structured value for
<a name="index-main"></a>
<code>main</code>. The values that it contains are dependent on the value set for
the one value it must have: <code>main-type</code>.
</p>
<a name="index-main_002dtype"></a>
<p>The recognized values for <code>main-type</code> are <code>guile</code>,
<code>shell-process</code>, <code>shell-parser</code>, <code>main</code>, <code>include</code>,
<code>invoke</code>, and <code>for-each</code>.
</p>
<table class="menu" border="0" cellspacing="0">
<tr><td align="left" valign="top">• <a href="main-guile.html#main-guile" accesskey="1">main guile</a>:</td><td> </td><td align="left" valign="top">guile: main and inner_main procedures
</td></tr>
<tr><td align="left" valign="top">• <a href="main-shell_002dprocess.html#main-shell_002dprocess" accesskey="2">main shell-process</a>:</td><td> </td><td align="left" valign="top">shell-process: emit Bourne shell results
</td></tr>
<tr><td align="left" valign="top">• <a href="main-shell_002dparser.html#main-shell_002dparser" accesskey="3">main shell-parser</a>:</td><td> </td><td align="left" valign="top">shell-parser: emit Bourne shell script
</td></tr>
<tr><td align="left" valign="top">• <a href="main-main.html#main-main" accesskey="4">main main</a>:</td><td> </td><td align="left" valign="top">main: user supplied main procedure
</td></tr>
<tr><td align="left" valign="top">• <a href="main-include.html#main-include" accesskey="5">main include</a>:</td><td> </td><td align="left" valign="top">include: code emitted from included template
</td></tr>
<tr><td align="left" valign="top">• <a href="main-invoke.html#main-invoke" accesskey="6">main invoke</a>:</td><td> </td><td align="left" valign="top">invoke: code emitted from AutoGen macro
</td></tr>
<tr><th colspan="3" align="left" valign="top"><pre class="menu-comment">
The <code>for-each</code> main procedure has a number of attributes that
must be specified:
</pre></th></tr><tr><td align="left" valign="top">• <a href="main-for_002deach.html#main-for_002deach" accesskey="7">main for-each</a>:</td><td> </td><td align="left" valign="top">for-each: perform function on each operand
</td></tr>
<tr><td align="left" valign="top">• <a href="main_002dfor_002deach_002dproc.html#main_002dfor_002deach_002dproc" accesskey="8">main-for-each-proc</a>:</td><td> </td><td align="left" valign="top">procedure to handle each argument
</td></tr>
<tr><td align="left" valign="top">• <a href="main_002dfor_002deach_002dtype.html#main_002dfor_002deach_002dtype" accesskey="9">main-for-each-type</a>:</td><td> </td><td align="left" valign="top">handler procedure type
</td></tr>
<tr><td align="left" valign="top">• <a href="main_002dfor_002deach_002dcode.html#main_002dfor_002deach_002dcode">main-for-each-code</a>:</td><td> </td><td align="left" valign="top">code for handler procedure
</td></tr>
<tr><td align="left" valign="top">• <a href="main_002dfor_002deach_002dopts.html#main_002dfor_002deach_002dopts">main-for-each-opts</a>:</td><td> </td><td align="left" valign="top">for-each main procedure options
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