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6	version : IDLdoc version
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8	embed : 0 for link to CSS, 1 for embed CSS
9	css_location : if embed then string filename of CSS file location, o/w href to CSS file
10	idldoc_syntax_filename : file containing IDLdoc output for the idldoc routine
11	navbar_filename : filename of navbar template
12	footer : filename of footer file to include
13	tagline_filename : filename of tagline template
14	Plus stuff needed by the templates: navbar, tagline
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21	<title>IDLdoc Developer's Help (SAXO Documentation)</title>
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87	<< prev file \| next file >>    <a href="idldoc-dev-help.html" target="_TOP">view single page</a> \| <a href="index.html" target="_TOP">view frames</a>    summary: fields \| routine    details: routine
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93
94	<h1>IDLdoc developer's guide</h1>
95
96	<p>This guide discusses how to mark up IDL pro code in order to
97	insert more information into IDLdoc's output.</p>
98
99	<p>Comments on the routine and file level are placed between
100	";+" and ";-" lines before a routine in IDL source code. Content
101	between these lines is copied verbatim into the IDLdoc output
102	for the routine it appears before with the exception of the
103	@-preceded "tags" listed in tables below. Once an @ appears in
104	the comments, IDLdoc processes all remaining lines of the
105	comments as tags. To place a non-tag defining "@" in your
106	comments, escape it with a "\", as in
107	"email_address\@rsinc.com".</p>
108
109	<p>In the following example, the @author tag is used to indicate
110	an author of the code. The second "@" is escaped to allow its
111	literal use in the email address:</p>
112
113	<pre class="snippet">; @author Michael Galloy, mgalloy\@rsinc.com</pre>
114
115	<h2>Routine level comments</h2>
116
117	<p>There are many tags which describe an individual
118	routine. Each tag name appears after an "@" sign as the first
119	non-whitespace character after the ;. The tags are described
120	below.</p>
121
122	<table class="basic" cellspacing="0">
123	<tr>
124	<th>Tag</th>
125	<th>Description</th>
126	</tr>
127	<tr>
128	<td>abstract</td>
129	<td>
130	Presence of the this tag indicates this method is
131	abstract. This is intended for use with methods of a class
132	which are not intended to be called, but are only provided
133	as documenting an interface that a subclass will override.
134	</td>
135	</tr>
136	<tr>
137	<td>author</td>
138	<td>
139	Text following this tag appears in a list of attributes
140	of the routine marked as "Author."
141	</td>
142	</tr>
143	<tr>
144	<td>bugs</td>
145	<td>
146	Text that follows this tag is copied into a bug
147	attribute of the routine and placed in a library wide
148	listing which documents known failings of routines.
149	</td>
150	</tr>
151	<tr>
152	<td>categories</td>
153	<td>
154	Text following this tag is used as a comma separated list
155	of categories of the routine. The syntax is:
156
157	<pre class="snippet">; @categories math, input/output</pre>
158
159	Category names are case-sensitive and may contain any
160	characters except commas (though whitespace at the
161	beginning and end will be removed).
162	</td>
163	</tr>
164	<tr>
165	<td>copyright</td>
166	<td>
167	Text following this tag appears in a list of attributes
168	of the routine marked as "Copyright."
169	</td>
170	</tr>
171	<tr>
172	<td>customer_id</td>
173	<td>
174	Text following this tag appears in a list of attributes
175	of the routine marked as "Customer ID."
176	</td>
177	</tr>
178	<tr>
179	<td>examples</td>
180	<td>
181	Text following this tag is copied into an examples
182	attribute of the routine; it is intended to have
183	example code of using the routine.
184	</td>
185	</tr>
186	<tr>
187	<td>field</td>
188	<td>
189	For routines in files that end in "__define", this
190	provides documentation of a member variable of a
191	class/structure. The syntax is
192
193	<pre class="snippet">; @field field_name comment</pre>
194
195	where "field" matches one of the structure field names
196	of the structure type/class being defined.
197	</td>
198	</tr>
199	<tr>
200	<td>hidden</td>
201	<td>
202	Presence of this tag hides this routine in IDLdoc
203	output.
204	</td>
205	</tr>
206	<tr>
207	<td>history</td>
208	<td>
209	Text following this tag is copied into a history
210	attribute of the routine; it is intended to have a
211	history of the creators and modifiers of the source
212	code of the routine.
213	</td>
214	</tr>
215	<tr>
216	<td>inherits</td>
217	<td>
218	Obsolete. Intended to provide the parent class of the
219	documented class, but this is automatically handled by
220	IDLdoc now (as long as class definitions are in files
221	that end "__define").
222	</td>
223	</tr>
224	<tr>
225	<td>keyword</td>
226	<td>
227	This tag documents a single keyword parameter to the
228	routine. This syntax is
229
230	<pre class="snippet">; @keyword keyword_name attributes comment</pre>
231
232	Attributes further describe keyword and detailed in
233	the section below. The comment may be an text and is
234	copied into the IDLdoc output.
235	</td>
236	</tr>
237	<tr>
238	<td>obsolete</td>
239	<td>
240	Presence of this tag marks the routine as obsolete.
241	</td>
242	</tr>
243	<tr>
244	<td>param</td>
245	<td>
246	This tag documents a single keyword parameter to the
247	routine. This syntax is
248
249	<pre class="snippet">; @param keyword_name attributes comment</pre>
250
251	Attributes further describe keyword and detailed in
252	the section below. The comment may be an text and is
253	copied into the IDLdoc output.
254	</td>
255	</tr>
256	<tr>
257	<td>pre</td>
258	<td>
259	Text following this tag will be copied to a pre
260	attribute of the routine; it is intended to give
261	conditions the routine assumes to be true before it
262	runs.
263	</td>
264	</tr>
265	<tr>
266	<td>post</td>
267	<td>
268	Text following this tag will be copied to a post
269	attribute of the routine; it is intended to give
270	conditions the routine assumes to be true after it
271	runs.
272	</td>
273	</tr>
274	<tr>
275	<td>private</td>
276	<td>
277	Presence of this tag will hide this routine in IDLdoc
278	output if IDLdoc is run in "user" mode.
279	</td>
280	</tr>
281	<tr>
282	<td>requires</td>
283	<td>
284	Text following this tag is copied into the "Requires"
285	attribute of the routine; it is intended to provide
286	the version of IDL required to run the routine. For
287	example,
288
289	<pre class="snippet">; @requires IDL 6.2</pre>
290
291	will simply cause "IDL 6.2" to appear in the
292	"Requires" attribute.
293	</td>
294	</tr>
295	<tr>
296	<td>restrictions</td>
297	<td>
298	Text following this tag is copied into the
299	"Restrictions" attribute of the routine; it is
300	intended to provide any restrictions on the use of the
301	routine.
302	</td>
303	</tr>
304	<tr>
305	<td>returns</td>
306	<td>
307	Text following this tag is copied into the "Returns"
308	attribute of the routine; it is intended to provide
309	information about return value of a function.
310	</td>
311	</tr>
312	<tr>
313	<td>todo</td>
314	<td>
315	This tag places an item in a library-wide list of todo
316	items. The text following the tag is copied into this list
317	along with the routine it appears in it.
318	</td>
319	</tr>
320	<tr>
321	<td>uses</td>
322	<td>
323	Text following this tag is placed in a uses attribute of
324	the routine; it is intended to list routines that this
325	routine calls.
326	</td>
327	</tr>
328	<tr>
329	<td>version</td>
330	<td>
331	Text following this tag is placed in a version attribute
332	of the routine; it is intended to give a version
333	name/number of the routine.
334	</td>
335	</tr>
336	</table>
337
338	<p>For each positional parameters or keyword tag additional
339	attributes may be added in curly braces. For example,</p>
340
341	<pre class="snippet">; @param x {in}{required}{type=lonarr} x-axis data</pre>
342
343	<p>The attributes are described below.</p>
344
345	<table class="basic" cellspacing="0">
346	<tr>
347	<th>Attribute</th>
348	<th>Description</th>
349	</tr>
350	<tr>
351	<td>default</td>
352	<td>
353	This atrribute defines the default value of the
354	parameter. Any string may be entered and is echoed in the
355	IDLdoc output.
356	</td>
357	</tr>
358	<tr>
359	<td>hidden</td>
360	<td>
361	This attribute hides this parameter in IDLdoc output.
362	</td>
363	</tr>
364	<tr>
365	<td>in</td>
366	<td>
367	This attribute marks the parameter as an input to the
368	routine.
369	</td>
370	</tr>
371	<tr>
372	<td>optional</td>
373	<td>
374	This attribute marks the parameter as optional; the
375	routine does not always need this parameter, although
376	there might be cases where the parameter is required
377	(depending on the presence and value of other parameters).
378	</td>
379	</tr>
380	<tr>
381	<td>out</td>
382	<td>
383	This attribute marks the parameter as an output to the
384	routine. This routine expects a named variable to be
385	passed to this parameter (if passed at all).
386	</td>
387	</tr>
388	<tr>
389	<td>private</td>
390	<td>
391	This attribute hides this parameter in IDLdoc output when
392	IDLdoc is run in "user" mode and marking it as "private"
393	when run in "developer" mode.
394	</td>
395	</tr>
396	<tr>
397	<td>required</td>
398	<td>
399	This attribute marks the parameter as required.
400	</td>
401	</tr>
402	<tr>
403	<td>type</td>
404	<td>
405	This atrribute defines the data type of the
406	parameter. Any string may be entered and is echoed in
407	the IDLdoc output. The special type "boolean" will cause
408	the calling syntax in IDLdoc output to use the IDL
409	online help syntax of prepending a "/" to the parameter
410	name.
411	</td>
412	</tr>
413	</table>
414
415	<h2>File level comments</h2>
416
417	<p>Some tags may appear in the comments for any routine in a
418	file because they document attributes of the file. These tags
419	are described below.</p>
420
421	<table class="basic" cellspacing="0">
422	<tr>
423	<th>Tag</th>
424	<th>Description</th>
425	</tr>
426	<tr>
427	<td>file_comments</td>
428	<td>
429	Text following the tag is copied to the top of the file
430	in the IDLdoc output i.e. it is a comment on the file
431	and not the routine it appears in. If there are multiple
432	file_comments tags in the file, the comments will be
433	concatenated in the order they are present in the file.
434	</td>
435	</tr>
436	<tr>
437	<td>hidden_file</td>
438	<td>
439	Presence of this tag indicates this entire file should
440	be hidden in IDLdoc output.
441	</td>
442	</tr>
443	<tr>
444	<td>private_file</td>
445	<td>
446	Presence of this tag indicates this entire file should
447	be hidden in IDLdoc output if IDLdoc is run in "user"
448	mode, but shown when run in "developer" mode (the
449	default).
450	</td>
451	</tr>
452	</table>
453
454	<h2>Examples</h2>
455
456	For example, here's a sample class definition routine:
457
458	<pre class="snippet">;+
459	; Define the instance variables of the array_list.
460	;
461	; @file_comments An array_list is an object representing a variable
462	; length list of scalar elements of any single type.
463	; Array_lists support adding elements at the end of
464	; the vector only, but any element may be removed from
465	; the array_list. An iterator is provided for
466	; efficient and easy looping throught the elements of
467	; the array_list.
468	;
469	; @field data pointer to an array
470	; @field cur_size the current size of the data in the array
471	; @field max_size the maximum size of the data in the current array
472	; @field type type code (as in SIZE function) for the elements in the
473	; array_list
474	; @field sample_struct pointer to a structure if the type is
475	; "structure"
476	; @field iterators IDL_Container for the iterators of this array_list
477	;
478	; @requires IDL 6.0
479	;
480	; @author Michael D. Galloy
481	; @history Created September 26, 2003
482	; @copyright RSI, 2003
483	;-
484	pro array_list__define
485	compile_opt idl2
486
487	define = { array_list, $
488	data:ptr_new(), $
489	cur_size:0L, $
490	max_size:0L, $
491	type:0L, $
492	sample_struct:ptr_new(), $
493	iterators:obj_new() $
494	}
495	end</pre>
496
497	Another example routine, this time a simple function with a positional parameter and keyword:
498
499	<pre class="snippet">;+
500	; Returns [b, a] for a linear function y = a * x + b that sends
501	; inRange[0] -> range[0] and inRange[1] -> range[1].
502	;
503	; @returns dblarr(2)
504	; @param inRange {in}{required}{type=2 element numeric array} input
505	; range
506	; @keyword range {in}{optional}{type=dblarr(2)}{default=[0.D, 1.D]}
507	; output range
508	; @categories math, object graphics
509	;-
510	function linear_function, inRange, range=outRange
511	compile_opt idl2
512
513	i_outRange = n_elements(outRange) eq 0 $
514	? [0.D, 1.D] $
515	: double(outRange)
516
517	scale = [i_outRange[0] * inRange[1] - i_outRange[1] * inRange[0], $
518	i_outRange[1] - i_outRange[0]] / (inRange[1] - inRange[0])
519	return, scale
520	end</pre>
521
522	One more example, this time a function method with an output keyword.
523
524	<pre class="snippet">;+
525	; Finds the value associated with the given key.
526	;
527	; @returns the value of the associated key or -1L if not found
528	; @param key {in}{type=key type} key to look up
529	; @keyword found {out}{optional}{type=boolean} true if value found for
530	; given key
531	;-
532	function hash_table::get, key, found=found</pre>
533
534	<h2>Directory overviews</h2>
535
536	<p>The "dir-overview" file in each directory of the library is
537	copied into the directory overview file. Much of the content of
538	the overview file is obtained from the PRO code files in the
539	directory, but this allows header content as an overview of the
540	all the files in the directory to be inserted at the top of the
541	directory overview file.</p>
542
543
544	<h2>Library overview</h2>
545
546	<p>The library overview file is a single file which is inserted
547	into the opening page of the IDLdoc output. This file is copied
548	verbatim into the IDLdoc output except for the following tag
549	which allows for comments on the contents of the directories
550	found in the library.</p>
551
552	<table class="basic" cellspacing="0">
553	<tr>
554	<th>Tag</th>
555	<th>Description</th>
556	</tr>
557	<tr>
558	<td>dir</td>
559	<td>
560	The text following this tag is the relative path
561	(web-style, always with a /) to a directory in the
562	library and a comment which is copied into a table in
563	the opening page of the IDLdoc output.
564
565	<pre class="snippet">; @dir algorithms/math mathematical routines</pre>
566	</td>
567	</tr>
568	</table>
569
570	<h2>Syntax of IDLdoc routine</h2>
571
572	<p>Below is the IDLdoc generated documentation for the IDLdoc main routine.</p>
573
574	<div class="routine_details" id="_idldoc">
575
576	<h2><a class="top" href="#container">top</a>idldoc</h2>
577
578	<p class="header">
579	idldoc, <a href="#_idldoc_keyword_root">root</a>=<span class="result">string</span>[, <a href="#_idldoc_keyword_output">output</a>=<span class="result">string</span>][, <a href="#_idldoc_keyword_overview">overview</a>=<span class="result">string</span>][, <a href="#_idldoc_keyword_footer">footer</a>=<span class="result">string</span>][, <a href="#_idldoc_keyword_log_file">log_file</a>=<span class="result">string</span>][, /<a href="#_idldoc_keyword_user">user</a>][, /<a href="#_idldoc_keyword_quiet">quiet</a>][, /<a href="#_idldoc_keyword_silent">silent</a>][, /<a href="#_idldoc_keyword_embed">embed</a>][, /<a href="#_idldoc_keyword_nonavbar">nonavbar</a>][, <a href="#_idldoc_keyword_title">title</a>=<span class="result">string</span>][, <a href="#_idldoc_keyword_subtitle">subtitle</a>=<span class="result">string</span>][, /<a href="#_idldoc_keyword_statistics">statistics</a>][, <a href="#_idldoc_keyword_n_warnings">n_warnings</a>=<span class="result">variable</span>][, /<a href="#_idldoc_keyword_browse_routines">browse_routines</a>][, /<a href="#_idldoc_keyword_preformat">preformat</a>][, /<a href="#_idldoc_keyword_assistant">assistant</a>]</p>
580
581	<div class="comments">Calling routine for IDLdoc.</div>
582
583	<h3>Keywords</h3>
584
585	<h4 id="_idldoc_keyword_root">root
586	<span class="attr">in</span>
587	<span class="attr">required</span>
588	<span class="attr">type:</span> <span class="value">string</span>
589	</h4>
590
591	<div class="comments"> root directory for IDLdoc's
592	recursive search for .pro files. IDLdoc will find any
593	files with the '.pro' suffix and include them in its file
594	listings. Only directories with '.pro' files in them are
595	included in the directory listings.</div>
596
597	<h4 id="_idldoc_keyword_output">output
598	<span class="attr">in</span>
599	<span class="attr">optional</span>
600	<span class="attr">type:</span> <span class="value">string</span>
601	<span class="attr">default:</span> <span class="value">same as root</span>
602	</h4>
603
604	<div class="comments">
605	directory in which to create the HTML output and possible
606	subdirectories</div>
607
608	<h4 id="_idldoc_keyword_overview">overview
609	<span class="attr">in</span>
610	<span class="attr">optional</span>
611	<span class="attr">type:</span> <span class="value">string</span>
612	</h4>
613
614	<div class="comments"> filepath to a file containing the
615	summary of the package information about each directory in
616	the package.</div>
617
618	<h4 id="_idldoc_keyword_footer">footer
619	<span class="attr">in</span>
620	<span class="attr">optional</span>
621	<span class="attr">type:</span> <span class="value">string</span>
622	</h4>
623
624	<div class="comments"> filename for a footer to be placed
625	at the bottom of files; this file can contain any valid
626	HTML</div>
627
628	<h4 id="_idldoc_keyword_log_file">log_file
629	<span class="attr">in</span>
630	<span class="attr">optional</span>
631	<span class="attr">type:</span> <span class="value">string</span>
632	</h4>
633
634	<div class="comments"> set to a filename of a file to
635	contain the error messages generated by the IDLdoc run;
636	useful for automated runs of IDLdoc</div>
637
638	<h4 id="_idldoc_keyword_user">user
639	<span class="attr">in</span>
640	<span class="attr">optional</span>
641	<span class="attr">type:</span> <span class="value">boolean</span>
642	</h4>
643
644	<div class="comments"> set to create a listing appropriate
645	for <em>users</em> of the given library hierarchy; the
646	default is to create documentation suited to developers.
647	If set private routines are not shown in the
648	documentation.</div>
649
650	<h4 id="_idldoc_keyword_quiet">quiet
651	<span class="attr">in</span>
652	<span class="attr">optional</span>
653	<span class="attr">type:</span> <span class="value">boolean</span>
654	</h4>
655
656	<div class="comments"> if set, print only
657	warnings</div>
658
659	<h4 id="_idldoc_keyword_silent">silent
660	<span class="attr">in</span>
661	<span class="attr">optional</span>
662	<span class="attr">type:</span> <span class="value">boolean</span>
663	</h4>
664
665	<div class="comments"> if set, print no
666	messages</div>
667
668	<h4 id="_idldoc_keyword_embed">embed
669	<span class="attr">in</span>
670	<span class="attr">optional</span>
671	<span class="attr">type:</span> <span class="value">boolean</span>
672	</h4>
673
674	<div class="comments"> if set, embeds style sheet in each
675	HTML document; if this is not set, each HTML file will be
676	looking for the cascading style sheet idldoc.css in the
677	directory specified for the ROOT keyword</div>
678
679	<h4 id="_idldoc_keyword_nonavbar">nonavbar
680	<span class="attr">in</span>
681	<span class="attr">optional</span>
682	<span class="attr">type:</span> <span class="value">boolean</span>
683	</h4>
684
685	<div class="comments"> set to exclude the
686	navigation bar at the top of each page</div>
687
688	<h4 id="_idldoc_keyword_title">title
689	<span class="attr">in</span>
690	<span class="attr">optional</span>
691	<span class="attr">type:</span> <span class="value">string</span>
692	<span class="attr">default:</span> <span class="value">Research Systems</span>
693	</h4>
694
695	<div class="comments"> title of
696	the library</div>
697
698	<h4 id="_idldoc_keyword_subtitle">subtitle
699	<span class="attr">in</span>
700	<span class="attr">optional</span>
701	<span class="attr">type:</span> <span class="value">string</span>
702	<span class="attr">default:</span> <span class="value">IDL version</span>
703	</h4>
704
705	<div class="comments"> subtitle of
706	the library</div>
707
708	<h4 id="_idldoc_keyword_statistics">statistics
709	<span class="attr">in</span>
710	<span class="attr">optional</span>
711	<span class="attr">type:</span> <span class="value">boolean</span>
712	</h4>
713
714	<div class="comments"> set to calculate several
715	McCabe statistics for each routine</div>
716
717	<h4 id="_idldoc_keyword_n_warnings">n_warnings
718	<span class="attr">out</span>
719	<span class="attr">optional</span>
720	<span class="attr">type:</span> <span class="value">integer</span>
721	</h4>
722
723	<div class="comments"> set to a named variable to
724	contain the total number of warnings issued during the run</div>
725
726	<h4 id="_idldoc_keyword_browse_routines">browse_routines
727	<span class="attr">in</span>
728	<span class="attr">optional</span>
729	<span class="attr">type:</span> <span class="value">boolean</span>
730	</h4>
731
732	<div class="comments"> set to include a frame
733	to browse through the routines of the current file</div>
734
735	<h4 id="_idldoc_keyword_preformat">preformat
736	<span class="attr">in</span>
737	<span class="attr">optional</span>
738	<span class="attr">type:</span> <span class="value">boolean</span>
739	</h4>
740
741	<div class="comments"> set to produce output that
742	will look like it does in the code files (line for line)</div>
743
744	<h4 id="_idldoc_keyword_assistant">assistant
745	<span class="attr">in</span>
746	<span class="attr">optional</span>
747	<span class="attr">type:</span> <span class="value">boolean</span>
748	</h4>
749
750	<div class="comments"> set to produce output for the
751	IDL assistant help system instead of optimized for a web browser
752	</div>
753
754	<h3>Examples</h3><div class="preformat"> To run IDLdoc, try:
755	<center><code>idldoc, root='C:\mycode'</code></center>
756	where C:\mycode is the root of a directory tree containing IDL
757	.pro files.
758	</div>
759
760	<h3>Version history</h3>
761
762	<h4>Author</h4><div class="preformat"> Michael D. Galloy</div>
763
764	<h4>Copyright</h4><div class="preformat"> RSI, 2002</div>
765
766	<h3>Other attributes</h3>
767
768	<h4>Requires IDL version</h4><div class="preformat"> IDL 6.0</div>
769
770	</div>
771
772
773
774
775
776	<div id="tagline">Produced by IDLdoc 2.0.</div>
777
778	</div>
779
780	</body>
781	</html>

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