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<p>
Next: <a href="Temporary-comments.html#Temporary-comments" accesskey="n" rel="next">Temporary comments</a>, Previous: <a href="Invisible-comments.html#Invisible-comments" accesskey="p" rel="prev">Invisible comments</a>, Up: <a href="Comments.html#Comments" accesskey="u" rel="up">Comments</a> [<a href="Parameter-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>
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<a name="Visible-comments-1"></a>
<h3 class="section">6.2 Visible comments</h3>
<a name="index-Comments_002c-visible"></a>
<p>‘<samp>/* ... */</samp>’ is a long comment (it may extend over several lines).
</p>
<p>‘<samp>// ...</samp>’ is a short comment (terminated by the next newline).
</p>
<p>‘<samp>@(...@)</samp>’ is a meta-comment. Meta-comments are a localized form
of the N mode (see <a href="Languages.html#Languages">Languages</a>). Tangled meta-comments are begun by
the contents of the style-file entry ‘<samp>meta.top</samp>’ and terminated by
‘<samp>meta.bottom</samp>’. Each line of the meta-comment is begun by
‘<samp>meta.prefix</samp>’. Woven meta-comments are begun by
‘<samp>meta_code.begin</samp>’ and ended by ‘<samp>meta_code.end</samp>’.
See <a href="Miscellaneous-params.html#Miscellaneous-params">Miscellaneous params</a>.
</p>
<div class="example">
<pre class="example">@n
@a
program main
/* Get input. */
call get_input // Read the parameter file.
/* Process information. Comments like this
can be split over several lines. */
@(
Meta-comments provide a poor-person's alignment feature
i --- counter
x --- data value
@)
i = 1
x = 2.0
call exec(i,x)
end
</pre></div>
<p><em>The use of meta-comments is not recommended;</em> they are only
marginally supported. Use ordinary long comments
instead. Inside of them, use the various powerful features of TeX or
LaTeX (such as <code>\halign</code> or
<code>\begin{verbatim}</code> <code>...</code> <code>\end{verbatim}</code>) to format
your comment appropriately.
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