a797e1da |
1 | %% |
2 | %% This is file `syntax.sty', |
3 | %% generated with the docstrip utility. |
4 | %% |
5 | %% The original source files were: |
6 | %% |
7 | %% syntax.dtx (with options: `package') |
8 | %% doafter.dtx (with options: `macro') |
9 | %% |
10 | %% IMPORTANT NOTICE |
11 | %% |
12 | %% syntax package -- typesetting syntax descriptions |
13 | %% Copyright (c) 1996 Mark Wooding |
14 | %% |
15 | %% This program is free software; you can redistribute it and/or modify |
16 | %% it under the terms of the GNU General Public License as published by |
17 | %% the Free Software Foundation; either version 2 of the License, or |
18 | %% (at your option) any later version. |
19 | %% |
20 | %% This program is distributed in the hope that it will be useful, |
21 | %% but WITHOUT ANY WARRANTY; without even the implied warranty of |
22 | %% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
23 | %% GNU General Public License for more details. |
24 | %% |
25 | %% You should have received a copy of the GNU General Public License |
26 | %% along with this program; if not, write to the Free Software |
27 | %% Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
28 | %% |
29 | \NeedsTeXFormat{LaTeX2e} |
30 | \ProvidesPackage{syntax} |
31 | [1996/05/17 1.9 Syntax typesetting (MDW)] |
32 | %% \CharacterTable |
33 | %% {Upper-case \A\B\C\D\E\F\G\H\I\J\K\L\M\N\O\P\Q\R\S\T\U\V\W\X\Y\Z |
34 | %% Lower-case \a\b\c\d\e\f\g\h\i\j\k\l\m\n\o\p\q\r\s\t\u\v\w\x\y\z |
35 | %% Digits \0\1\2\3\4\5\6\7\8\9 |
36 | %% Exclamation \! Double quote \" Hash (number) \# |
37 | %% Dollar \$ Percent \% Ampersand \& |
38 | %% Acute accent \' Left paren \( Right paren \) |
39 | %% Asterisk \* Plus \+ Comma \, |
40 | %% Minus \- Point \. Solidus \/ |
41 | %% Colon \: Semicolon \; Less than \< |
42 | %% Equals \= Greater than \> Question mark \? |
43 | %% Commercial at \@ Left bracket \[ Backslash \\ |
44 | %% Right bracket \] Circumflex \^ Underscore \_ |
45 | %% Grave accent \` Left brace \{ Vertical bar \| |
46 | %% Right brace \} Tilde \~} |
47 | %% |
48 | \DeclareOption{rounded}{\sd@roundtrue} |
49 | \DeclareOption{square}{\sd@roundfalse} |
50 | \DeclareOption{nounderscore}{\@uscorefalse} |
51 | \newif\ifsd@round |
52 | \newif\if@uscore\@uscoretrue |
53 | \ExecuteOptions{square} |
54 | \ProcessOptions |
55 | \def\addspecial#1{% |
56 | \remspecial{#1}% |
57 | \expandafter\def\expandafter\dospecials\expandafter{\dospecials\do#1}% |
58 | \expandafter\def\expandafter\@santize\expandafter{% |
59 | \@sanitize\@makeother#1}% |
60 | } |
61 | \def\remspecial#1{% |
62 | \def\do##1{\ifnum`#1=`##1 \else\noexpand\do\noexpand##1\fi}% |
63 | \edef\dospecials{\dospecials}% |
64 | \def\@makeother##1{\ifnum`#1=`##1 \else% |
65 | \noexpand\@makeother\noexpand##1\fi}% |
66 | \edef\@sanitize{\@sanitize}% |
67 | \def\@makeother##1{\catcode`##112}% |
68 | } |
69 | \def\underscore{% |
70 | \leavevmode% |
71 | \kern.06em% |
72 | \vbox{% |
73 | \hrule\@width.6em\@depth.4ex\@height-.34ex% |
74 | }% |
75 | \ifdim\fontdimen\@ne\font=\z@% |
76 | \kern.06em% |
77 | \fi% |
78 | } |
79 | \let\usc@builtindischyphen\- |
80 | \def\@uscore.{% |
81 | \ifmmode% |
82 | \expandafter\@firstoftwo% |
83 | \else% |
84 | \expandafter\@secondoftwo% |
85 | \fi% |
86 | \sb% |
87 | {\textunderscore\@ifnextchar_{}{\usc@builtindischyphen}}% |
88 | } |
89 | \if@uscore |
90 | \AtBeginDocument{% |
91 | \catcode`\_\active% |
92 | \begingroup% |
93 | \lccode`\~`\_% |
94 | \lowercase{\endgroup\def~{\protect\@uscore.}}% |
95 | } |
96 | \fi |
97 | \expandafter\let\csname?\string\textunderscore\endcsname\underscore |
98 | \def\shortverb#1{% |
99 | \@ifundefined{cc@\string#1}{% |
100 | \addspecial#1% |
101 | \begingroup% |
102 | \lccode`\~`#1% |
103 | \lowercase{% |
104 | \endgroup% |
105 | \expandafter\let\csname mn@\string#1\endcsname~% |
106 | \expandafter\edef\csname cc@\string#1\endcsname{% |
107 | \catcode`\noexpand#1\the\catcode`#1% |
108 | \let\noexpand~\expandafter\noexpand% |
109 | \csname mn@\string#1\endcsname% |
110 | \noexpand\remspecial\noexpand#1% |
111 | \let\csname cc@\string#1\endcsname\relax% |
112 | }% |
113 | \def~{\verb~\syn@ttspace}% |
114 | }% |
115 | \catcode`#1\active% |
116 | }{% |
117 | \PackageWarning{syntax}{Character `\expandafter\@gobble\string#1' |
118 | is already a verbatim\MessageBreak |
119 | delimiter}% |
120 | }% |
121 | } |
122 | \def\unverb#1{% |
123 | \@ifundefined{cc@\string#1}{% |
124 | \PackageWarning{syntax}{Character `\expandafter\@gobble\string#1' |
125 | is not a verbatim\MessageBreak |
126 | delimiter}% |
127 | }{% |
128 | \csname cc@\string#1\endcsname% |
129 | }% |
130 | } |
131 | \newcommand{\syntleft}{$\langle$\normalfont\itshape} |
132 | \newcommand{\syntright}{$\rangle$} |
133 | \newcommand{\ulitleft}{\normalfont\ttfamily\syn@ttspace\frenchspacing} |
134 | \newcommand{\ulitright}{} |
135 | \newcommand{\litleft}{`\bgroup\ulitleft} |
136 | \newcommand{\litright}{\ulitright\egroup'} |
137 | \def\synt#1{\mbox{\syntleft{#1\/}\syntright}} |
138 | \def\lit{\@ifstar{\lit@i\ulitleft\ulitright}{\lit@i\litleft\litright}} |
139 | \def\lit@i#1#2#3{\mbox{#1{#3\/}#2}} |
140 | \def\syn@ttspace@{\spaceskip.35em\@plus.2em\@minus.15em\relax} |
141 | \def\ttthinspace{\let\syn@ttspace\syn@ttspace@} |
142 | \def\ttthickspace{\let\syn@ttspace\@empty} |
143 | \ttthinspace |
144 | \def\readupto#1#2#3{% |
145 | \bgroup% |
146 | \verb@eol@error% |
147 | \let\do\@makeother\dospecials% |
148 | #2% |
149 | \catcode`#1\active% |
150 | \lccode`\~`#1% |
151 | \gdef\verb@balance@group{\verb@egroup% |
152 | \@latex@error{\noexpand\verb illegal in command argument}\@ehc}% |
153 | \def\@vhook{\verb@egroup#3}% |
154 | \aftergroup\verb@balance@group% |
155 | \lowercase{\let~\@vhook}% |
156 | } |
157 | \def\syn@assist#1#2#3#4#5{% |
158 | \mbox\bgroup% |
159 | \chardef\\`\\% |
160 | \chardef\>`\>% |
161 | \chardef\'`\'% |
162 | \chardef\"`\"% |
163 | \chardef\ `\ % |
164 | \def\ch##1{\char`##1}% |
165 | \def\act##1{% |
166 | \catcode`##1\active% |
167 | \begingroup% |
168 | \lccode`\~`##1% |
169 | \lowercase{\endgroup\def~}% |
170 | }% |
171 | #1% |
172 | \begingroup% |
173 | \readupto#3{% |
174 | \catcode`\\0% |
175 | \catcode`\ 10% |
176 | #2% |
177 | }{% |
178 | \/\endgroup#4\egroup#5% |
179 | }% |
180 | } |
181 | \begingroup |
182 | \catcode`\<\active |
183 | \catcode`\|\active |
184 | \catcode`\"\active |
185 | \catcode`\`\active |
186 | \gdef\syn@shorts#1#2{% |
187 | \def<{% |
188 | #1% |
189 | \syn@assist% |
190 | \syntleft% |
191 | {\act_{\@foundunderscore}}% |
192 | >% |
193 | \syntright% |
194 | {#2}% |
195 | }% |
196 | \def`{% |
197 | #1% |
198 | \syn@assist% |
199 | \litleft% |
200 | \relax% |
201 | '% |
202 | \litright% |
203 | {#2}% |
204 | }% |
205 | \def"{% |
206 | #1% |
207 | \syn@assist% |
208 | \ulitleft% |
209 | \relax% |
210 | "% |
211 | \ulitright% |
212 | {#2}% |
213 | }% |
214 | \def|{\textbar}% |
215 | } |
216 | \endgroup |
217 | \def\syntaxShortcuts#1#2{% |
218 | \syn@shorts{#1}{#2}% |
219 | \addspecial\`% |
220 | \addspecial\<% |
221 | \addspecial\|% |
222 | \addspecial\"% |
223 | \catcode`\|\active% |
224 | \catcode`\<\active% |
225 | \catcode`\"\active% |
226 | \catcode`\`\active% |
227 | } |
228 | \def\synshorts{\syntaxShortcuts\relax\relax} |
229 | \def\synshortsoff{% |
230 | \catcode`\|12% |
231 | \catcode`\<12% |
232 | \catcode`\"12% |
233 | \catcode`\`12% |
234 | } |
235 | \def\syntax#{\bgroup\syntaxShortcuts\relax\relax\let\@let@token} |
236 | \newskip\grammarparsep |
237 | \grammarparsep8\p@\@plus\p@\@minus\p@ |
238 | \newdimen\grammarindent |
239 | \grammarindent2em |
240 | \newcommand{\grammarlabel}[2]{% |
241 | \synt{#1} \hfill#2% |
242 | } |
243 | \def\gr@implitem<#1> #2 {% |
244 | \sbox\z@{\hskip\labelsep\grammarlabel{#1}{#2}}% |
245 | \strut\@@par% |
246 | \vskip-\parskip% |
247 | \vskip-\baselineskip% |
248 | \hrule\@height\z@\@depth\z@\relax% |
249 | \item[\unhbox\z@]% |
250 | \catcode`\<\active% |
251 | } |
252 | \let\gr@leftsq\[ |
253 | \let\gr@rightsq\] |
254 | \def\[{\gr@leftsq} |
255 | \def\]{\gr@rightsq} |
256 | \newenvironment{grammar}{% |
257 | \list{}{% |
258 | \labelwidth\grammarindent% |
259 | \leftmargin\grammarindent% |
260 | \advance\grammarindent\labelsep |
261 | \itemindent\z@% |
262 | \listparindent\z@% |
263 | \parsep\grammarparsep% |
264 | }% |
265 | \let\\\@normalcr |
266 | \syntaxShortcuts\relax\relax% |
267 | \def\alt{\\\llap{\textbar\quad}}% |
268 | \def\gr@setpar{% |
269 | \def\par{% |
270 | \parshape\@ne\@totalleftmargin\linewidth% |
271 | \@@par% |
272 | \catcode`\<12% |
273 | \everypar{% |
274 | \everypar{}% |
275 | \catcode`\<\active% |
276 | \gr@implitem% |
277 | }% |
278 | }% |
279 | }% |
280 | \gr@setpar% |
281 | \par% |
282 | \def\gr@endsyntdiag]{\end{syntdiag}\gr@setpar\par}% |
283 | \def\[{\@ifnextchar[{\begin{syntdiag}\@gobble}\gr@leftsq}% |
284 | \def\]{\@ifnextchar]\gr@endsyntdiag\gr@rightsq}% |
285 | }{% |
286 | \@newlistfalse% |
287 | \everypar{}% |
288 | \endlist% |
289 | } |
290 | \newskip\sdstartspace |
291 | \newskip\sdendspace |
292 | \newskip\sdmidskip |
293 | \newskip\sdtokskip |
294 | \newskip\sdfinalskip |
295 | \newdimen\sdrulewidth |
296 | \newdimen\sdcirclediam |
297 | \newdimen\sdindent |
298 | \dimendef\sd@lower\z@ |
299 | \dimendef\sd@upper\tw@ |
300 | \dimendef\sd@mid4 |
301 | \dimendef\sd@topcirc6 |
302 | \dimendef\sd@botcirc8 |
303 | \def\sd@setsize{% |
304 | \sd@mid\ht\strutbox% |
305 | \advance\sd@mid-\dp\strutbox% |
306 | \sd@mid.5\sd@mid% |
307 | \sd@upper\sdrulewidth% |
308 | \advance\sd@upper\sd@mid% |
309 | \sd@lower\sdrulewidth% |
310 | \advance\sd@lower-\sd@mid% |
311 | \sd@topcirc-.5\sdcirclediam% |
312 | \advance\sd@topcirc\sd@mid% |
313 | \sd@botcirc-.5\sdcirclediam% |
314 | \advance\sd@botcirc-\sd@mid% |
315 | } |
316 | \newcommand{\sdsize}{% |
317 | \small% |
318 | } |
319 | \newcommand{\sdlengths}{% |
320 | \setlength{\sdstartspace}{1em minus 10pt}% |
321 | \setlength{\sdendspace}{1em minus 10pt}% |
322 | \setlength{\sdmidskip}{0.5em plus 0.0001fil}% |
323 | \setlength{\sdtokskip}{0.25em plus 0.0001fil}% |
324 | \setlength{\sdfinalskip}{0.5em plus 10000fil}% |
325 | \setlength{\sdrulewidth}{0.2pt}% |
326 | \setlength{\sdcirclediam}{8pt}% |
327 | \setlength{\sdindent}{0pt}% |
328 | } |
329 | \newif\ifsd@base |
330 | \newif\ifsd@top |
331 | \newif\ifsd@toplayer |
332 | \newif\ifsd@backwards |
333 | \def\sd@err{\PackageError{syntax}} |
334 | \def\sd@arrow{% |
335 | \ht\tw@\z@% |
336 | \dp\tw@\z@% |
337 | \raise\sd@mid\box\tw@% |
338 | \egroup% |
339 | } |
340 | \def\sd@rightarr{% |
341 | \bgroup% |
342 | \setbox\tw@\hbox{\kern-6\p@\@linefnt\char'55}% |
343 | \sd@arrow% |
344 | } |
345 | \def\sd@leftarr{% |
346 | \bgroup% |
347 | \raise\sd@mid\hbox{\@linefnt\char'33\kern-6\p@}% |
348 | \sd@arrow% |
349 | } |
350 | \def\sd@uparr{% |
351 | \bgroup% |
352 | \setbox\tw@\hb@xt@\z@{\kern-\sdrulewidth\@linefnt\char'66\hss}% |
353 | \setbox\tw@\hbox{\lower10\p@\box\tw@}% |
354 | \sd@arrow% |
355 | } |
356 | \def\sd@downarr{% |
357 | \bgroup% |
358 | \setbox\tw@\hb@xt@\z@{\kern-\sdrulewidth\@linefnt\char'77\hss}% |
359 | \sd@arrow% |
360 | } |
361 | \def\sd@circ#1{% |
362 | \@getcirc\sdcirclediam% |
363 | \advance\@tempcnta#1% |
364 | \setbox\tw@\hbox{\lower\sdrulewidth% |
365 | \hbox{\@circlefnt\char\@tempcnta}}% |
366 | \wd\tw@\z@% |
367 | \leavevmode% |
368 | } |
369 | \def\sd@tlcirc{{% |
370 | \sd@circ3% |
371 | \ht\tw@\sdrulewidth% |
372 | \dp\tw@.5\sdcirclediam% |
373 | \kern-\tw@\sdrulewidth% |
374 | \raise\sd@mid\box\tw@% |
375 | \kern.5\sdcirclediam% |
376 | }} |
377 | \def\sd@trcirc{{% |
378 | \sd@circ0% |
379 | \ht\tw@\sdrulewidth% |
380 | \dp\tw@.5\sdcirclediam% |
381 | \kern.5\sdcirclediam% |
382 | \raise\sd@mid\box\tw@% |
383 | }} |
384 | \def\sd@blcirc{{% |
385 | \sd@circ2% |
386 | \ht\tw@.5\sdcirclediam% |
387 | \dp\tw@\sdrulewidth% |
388 | \kern-\tw@\sdrulewidth% |
389 | \raise\sd@mid\box\tw@% |
390 | \kern.5\sdcirclediam% |
391 | }} |
392 | \def\sd@brcirc{{% |
393 | \sd@circ1% |
394 | \ht\tw@.5\sdcirclediam% |
395 | \dp\tw@\sdrulewidth% |
396 | \kern.5\sdcirclediam% |
397 | \raise\sd@mid\box\tw@% |
398 | }} |
399 | \def\sd@llc#1{% |
400 | \hb@xt@.5\sdcirclediam{% |
401 | \sd@rule\hskip.5\sdcirclediam% |
402 | \hss% |
403 | #1% |
404 | }% |
405 | } |
406 | \def\sd@rlc#1{% |
407 | \hb@xt@.5\sdcirclediam{% |
408 | #1% |
409 | \hss% |
410 | \sd@rule\hskip.5\sdcirclediam% |
411 | }% |
412 | } |
413 | \def\sd@rule{\leaders\hrule\@height\sd@upper\@depth\sd@lower} |
414 | \def\sd@gap#1{% |
415 | \ifsd@base% |
416 | \skip@#1% |
417 | \divide\skip\z@\tw@% |
418 | \nobreak\sd@rule\hskip\skip@% |
419 | \discretionary{% |
420 | \sd@qarrow{->}% |
421 | }{% |
422 | \hbox{% |
423 | \sd@qarrow{>-}% |
424 | \sd@rule\hskip\sdstartspace% |
425 | \sd@rule\hskip3.5\p@% |
426 | }% |
427 | }{% |
428 | }% |
429 | \nobreak\sd@rule\hskip\skip@% |
430 | \else% |
431 | \sd@rule\hskip#1% |
432 | \fi% |
433 | } |
434 | \def\syntdiag{% |
435 | \syntaxShortcuts\sd@tok@i\sd@tok@ii% |
436 | \@ifnextchar[\syntdiag@i{\syntdiag@i[]}% |
437 | } |
438 | \def\syntdiag@i[#1]{% |
439 | \sdsize\sdlengths% |
440 | #1% |
441 | \sd@setsize% |
442 | \list{}{% |
443 | \leftmargin\sdindent% |
444 | \rightmargin\leftmargin% |
445 | \labelsep\z@% |
446 | \labelwidth\z@% |
447 | }% |
448 | \item[]% |
449 | \parfillskip\z@% |
450 | \noindent% |
451 | \sd@qarrow{>>-}% |
452 | \nobreak\sd@rule\hskip\sdstartspace% |
453 | \sd@basetrue% |
454 | \sloppy% |
455 | \interlinepenalty100% |
456 | \hyphenpenalty0% |
457 | \catcode`\ 9% |
458 | \catcode`\^^M9% |
459 | \def\gr@leftsq{\begin{stack}\\}% |
460 | \def\gr@rightsq{\end{stack}}% |
461 | \def\({\begin{stack}}% |
462 | \def\){\end{stack}}% |
463 | \def\<{\begin{rep}}% |
464 | \def\>{\end{rep}}% |
465 | \let\\\sd@newline% |
466 | \ignorespaces% |
467 | } |
468 | \def\endsyntdiag{% |
469 | \unskip% |
470 | \nobreak\sd@rule\hskip\sdmidskip% |
471 | \sd@rule\hskip\sdfinalskip% |
472 | \sd@qarrow{-><}% |
473 | \endlist% |
474 | } |
475 | \@namedef{syntdiag*}{% |
476 | \syntaxShortcuts\sd@tok@i\sd@tok@ii% |
477 | \@ifnextchar[\syntdiag@s@i{\syntdiag@s@i[]}% |
478 | } |
479 | \def\syntdiag@s@i[#1]{% |
480 | \@ifnextchar[{\syntdiag@s@ii{#1}}{\syntdiag@s@iii{#1}{\hbox}}% |
481 | } |
482 | \def\syntdiag@s@ii#1[#2]{\syntdiag@s@iii{#1}{\hb@xt@#2}} |
483 | \def\syntdiag@s@iii#1#2{% |
484 | \leavevmode% |
485 | #2\bgroup% |
486 | \let\@@left\left% |
487 | \let\@@right\right% |
488 | \def\left##1{\def\sd@startarr{##1}}% |
489 | \def\right##1{\def\sd@endarr{##1}}% |
490 | \left{>-}\right{->}% |
491 | \sdsize\sdlengths% |
492 | #1% |
493 | \sd@setsize% |
494 | \let\left\@@left% |
495 | \let\right\@@right% |
496 | \sd@qarrow\sd@startarr% |
497 | \sd@rule\hskip\sdmidskip% |
498 | \sd@basefalse% |
499 | \catcode`\ 9% |
500 | \catcode`\^^M9% |
501 | \ignorespaces% |
502 | } |
503 | \@namedef{endsyntdiag*}{% |
504 | \unskip% |
505 | \sd@rule\hskip\sdmidskip% |
506 | \sd@rule\hskip\sdfinalskip% |
507 | \sd@qarrow\sd@endarr% |
508 | \egroup% |
509 | } |
510 | \def\sd@qarrow#1{% |
511 | \begingroup% |
512 | \lccode`\~=`\<\lowercase{\def~{<}}% |
513 | \hbox{\csname sd@arr@#1\endcsname}% |
514 | \endgroup% |
515 | } |
516 | \@namedef{sd@arr@>>-}{\sd@rightarr\kern-.5\p@\sd@rightarr\kern-\p@} |
517 | \@namedef{sd@arr@>-}{\sd@rightarr\kern-\p@} |
518 | \@namedef{sd@arr@->}{\sd@rightarr} |
519 | \@namedef{sd@arr@-><}{\sd@rightarr\kern-\p@\sd@leftarr} |
520 | \@namedef{sd@arr@...}{$\cdots$} |
521 | \@namedef{sd@arr@-}{} |
522 | \def\sd@newline{\@ifstar{\vadjust{\penalty\@M}\sd@nl@i}\sd@nl@i} |
523 | \def\sd@nl@i{\@ifnextchar[\sd@nl@ii\sd@nl@iii} |
524 | \def\sd@nl@ii[#1]{\vspace{#1}\sd@nl@iii} |
525 | \def\sd@nl@iii{% |
526 | \nobreak\sd@rule\hskip\sdmidskip% |
527 | \sd@rule\hskip\sdfinalskip% |
528 | \kern-3\p@% |
529 | \sd@rightarr% |
530 | \newline% |
531 | \sd@rightarr% |
532 | \nobreak\sd@rule\hskip\sdstartspace% |
533 | \sd@rule\hskip3.5\p@% |
534 | } |
535 | \def\sdbox#1{% |
536 | \@tempskipa#1\relax% |
537 | \sd@gap\@tempskipa% |
538 | \setbox\z@\hbox\bgroup% |
539 | \begingroup% |
540 | \catcode`\ 10% |
541 | \catcode`\^^M5% |
542 | \synshortsoff% |
543 | } |
544 | \def\endsdbox{% |
545 | \endgroup% |
546 | \egroup% |
547 | \@tempdima\ht\z@% |
548 | \advance\@tempdima-\dp\z@% |
549 | \advance\@tempdima-\tw@\sd@mid% |
550 | \lower.5\@tempdima\box\z@% |
551 | \sd@gap\@tempskipa% |
552 | } |
553 | \def\sd@tok@i{% |
554 | \sdbox\sdtokskip% |
555 | \strut% |
556 | \space% |
557 | } |
558 | \def\sd@tok@ii{% |
559 | \space% |
560 | \endsdbox% |
561 | } |
562 | \def\tok#{% |
563 | \sdbox\sdtokskip% |
564 | \strut% |
565 | \enspace% |
566 | \syntaxShortcuts\relax\relax% |
567 | \doafter\sd@tok% |
568 | } |
569 | \def\sd@tok{% |
570 | \enspace% |
571 | \endsdbox% |
572 | } |
573 | \newcommand\stack[1][t]{% |
574 | \sd@gap\sdmidskip% |
575 | \begingroup\sd@basefalse% |
576 | \sd@toplayertrue% |
577 | \let\\\sd@stackcr% |
578 | \if#1t% |
579 | \let\@tempa\vtop% |
580 | \sd@toptrue% |
581 | \ifsd@round\llap{\sd@trcirc\kern\tw@\sdrulewidth}\fi% |
582 | \else\if#1b% |
583 | \let\@tempa\vbox% |
584 | \sd@topfalse% |
585 | \ifsd@round\llap{\sd@brcirc\kern\tw@\sdrulewidth}\fi% |
586 | \else% |
587 | \sd@err{Bad position argument passed to stack}% |
588 | {The positioning argument must be one of `t' or `b'. I% |
589 | have^^Jassumed you meant to type `t'.}% |
590 | \let\@tempa\vtop% |
591 | \fi\fi% |
592 | \@tempa\bgroup% |
593 | \offinterlineskip% |
594 | \ialign\bgroup% |
595 | ##\cr% |
596 | \setbox\z@\hbox\bgroup% |
597 | \strut% |
598 | } |
599 | \def\endstack{% |
600 | \egroup% |
601 | \ifsd@toplayer% |
602 | \sd@dostack\sd@upper\sd@lower\relax\relax% |
603 | \else% |
604 | \ifsd@round% |
605 | \ifsd@top% |
606 | \sd@dostack{\ht\z@}\sd@botcirc\sd@blcirc\sd@brcirc% |
607 | \else% |
608 | \sd@dostack{\ht\z@}\sd@botcirc\relax\relax% |
609 | \fi% |
610 | \else% |
611 | \sd@dostack{\ht\z@}\sd@lower\relax\relax% |
612 | \fi% |
613 | \fi% |
614 | \egroup% |
615 | \egroup% |
616 | \ifsd@round% |
617 | \ifsd@top |
618 | \rlap{\kern\tw@\sdrulewidth\sd@tlcirc}% |
619 | \else% |
620 | \rlap{\kern\tw@\sdrulewidth\sd@blcirc}% |
621 | \fi% |
622 | \fi% |
623 | \endgroup\sd@gap\sdmidskip% |
624 | } |
625 | \def\sd@stackcr{% |
626 | \egroup% |
627 | \ifsd@toplayer% |
628 | \ifsd@round% |
629 | \ifsd@top% |
630 | \sd@dostack\sd@topcirc{\dp\z@}\relax\relax% |
631 | \else% |
632 | \sd@dostack\sd@topcirc{\dp\z@}\sd@tlcirc\sd@trcirc% |
633 | \fi% |
634 | \else% |
635 | \sd@dostack\sd@upper{\dp\z@}\relax\relax% |
636 | \fi% |
637 | \else% |
638 | \ifsd@round% |
639 | \ifsd@top% |
640 | \sd@dostack{\ht\z@}{\dp\z@}\sd@blcirc\sd@brcirc% |
641 | \else% |
642 | \sd@dostack{\ht\z@}{\dp\z@}\sd@tlcirc\sd@trcirc% |
643 | \fi% |
644 | \else% |
645 | \sd@dostack{\ht\z@}{\dp\z@}\relax\relax% |
646 | \fi% |
647 | \fi% |
648 | \sd@toplayerfalse% |
649 | \setbox\z@\hbox\bgroup% |
650 | \strut% |
651 | } |
652 | \def\sd@dostack#1#2#3#4{% |
653 | \@tempdima#1% |
654 | \@tempdimb#2% |
655 | \kern-\tw@\sdrulewidth% |
656 | \vrule\@height\@tempdima\@depth\@tempdimb\@width\tw@\sdrulewidth% |
657 | #3% |
658 | \sd@rule\hfill% |
659 | \sd@gap\sdtokskip% |
660 | \unhbox\z@% |
661 | \sd@gap\sdtokskip% |
662 | \sd@rule\hfill% |
663 | #4% |
664 | \vrule\@height\@tempdima\@depth\@tempdimb\@width\tw@\sdrulewidth% |
665 | \kern-\tw@\sdrulewidth% |
666 | \cr% |
667 | } |
668 | \newcommand\rep[1][t]{% |
669 | \sd@gap\sdmidskip% |
670 | \begingroup\sd@basefalse% |
671 | \ifsd@backwards\sd@backwardsfalse\else\sd@backwardstrue\fi% |
672 | \let\\\sd@loop% |
673 | \if#1t% |
674 | \let\@tempa\vbox% |
675 | \sd@toptrue% |
676 | \else\if#1b% |
677 | \let\@tempa\vtop% |
678 | \sd@topfalse% |
679 | \else% |
680 | \sd@err{Bad position argument passed to loop}% |
681 | {The positioning argument must be `t' or `b'. I have^^J% |
682 | assumed you meant to type `t'.}% |
683 | \let\@tempa\vbox% |
684 | \sd@toptrue% |
685 | \fi\fi% |
686 | \@tempa\bgroup% |
687 | \setbox\tw@\copy\strutbox% |
688 | \setbox\z@\hbox\bgroup\strut% |
689 | } |
690 | \def\endrep{% |
691 | \egroup% |
692 | \ifsd@top% |
693 | \ifsd@round% |
694 | \sd@doloop\tw@\z@\relax\relax% |
695 | \sd@tlcirc\sd@trcirc{\sd@rlc\sd@blcirc}{\sd@llc\sd@brcirc}% |
696 | \else% |
697 | \sd@doloop\tw@\z@\relax\sd@downarr\relax\relax\relax\relax% |
698 | \fi% |
699 | \else% |
700 | \ifsd@round% |
701 | \sd@doloop\z@\tw@\relax\relax% |
702 | {\sd@rlc\sd@tlcirc}{\sd@llc\sd@trcirc}\sd@blcirc\sd@brcirc% |
703 | \else% |
704 | \sd@doloop\z@\tw@\sd@uparr\relax\relax\relax\relax\relax% |
705 | \fi% |
706 | \fi% |
707 | \egroup% |
708 | \endgroup\sd@gap\sdmidskip% |
709 | } |
710 | \def\sd@loop{% |
711 | \egroup% |
712 | \def\\{\sd@err{Too many \string\\\space commands in loop}\@ehc}% |
713 | \setbox\tw@\hbox\bgroup\strut% |
714 | } |
715 | \def\sd@doloop#1#2#3#4#5#6#7#8{% |
716 | \@tempdima\dp#1\relax% |
717 | \@tempdimb\ht#2\relax% |
718 | \offinterlineskip% |
719 | \ialign{% |
720 | ##\cr% |
721 | \ifsd@round% |
722 | \sd@doloop@i#1#3\sd@topcirc\@tempdima{#5}{#6}% |
723 | \sd@doloop@i#2#4\@tempdimb\sd@botcirc{#7}{#8}% |
724 | \else% |
725 | \sd@doloop@i#1#3\sd@upper\@tempdima{#5}{#6}% |
726 | \sd@doloop@i#2#4\@tempdimb\sd@lower{#7}{#8}% |
727 | \fi% |
728 | }% |
729 | } |
730 | \def\sd@doloop@i#1#2#3#4#5#6{% |
731 | \ifsd@backwards#2\fi% |
732 | \kern-\tw@\sdrulewidth% |
733 | \vrule\@height#3\@depth#4\@width\tw@\sdrulewidth% |
734 | #5% |
735 | \sd@rule\hfill% |
736 | \sd@gap\sdtokskip% |
737 | \unhbox#1% |
738 | \sd@gap\sdtokskip% |
739 | \sd@rule\hfill% |
740 | #6% |
741 | \vrule\@height#3\@depth#4\@width\tw@\sdrulewidth% |
742 | \ifsd@backwards\else#2\fi% |
743 | \kern-\tw@\sdrulewidth% |
744 | \cr% |
745 | } |
746 | %% |
747 | %% doafter package -- insert a token really after a group |
748 | %% Copyright (c) 1996 Peter Schmitt and Mark Wooding |
749 | %% |
750 | \let\@@aftergroup\aftergroup |
751 | \def\doafter#1{% |
752 | \def\@tempa{\@@aftergroup#1}% |
753 | \afterassignment\doafter@i\let\@let@token% |
754 | } |
755 | \def\doafter@i{% |
756 | \@let@token% |
757 | \let\aftergroup\@my@aftergroup% |
758 | \@@aftergroup\@prepare@after\@tempa% |
759 | } |
760 | \def\ag@cnt@local{0 } |
761 | \let\ag@cnt@global\ag@cnt@local |
762 | \def\@my@aftergroup{% |
763 | \begingroup% |
764 | \count@\ag@cnt@local% |
765 | \advance\count@\@ne% |
766 | \xdef\ag@cnt@global{\the\count@\space}% |
767 | \endgroup% |
768 | \let\ag@cnt@local\ag@cnt@global% |
769 | \@@aftergroup\@after@token\@@aftergroup% |
770 | } |
771 | \def\@after@token{% |
772 | \@start@after@group% |
773 | \@after@token% |
774 | } |
775 | \def\@start@after@group{% |
776 | \begingroup% |
777 | \count@\ag@cnt@global% |
778 | \clubpenalty\ag@cnt@local% |
779 | \let\@after@token\@after@token@i% |
780 | } |
781 | \def\@after@token@i{% |
782 | \advance\count@\m@ne% |
783 | \ifnum\count@=\clubpenalty% |
784 | \global\let\ag@cnt@global\ag@cnt@local% |
785 | \expandafter\@after@aftertoken\expandafter\@after@all% |
786 | \else% |
787 | \expandafter\@@aftergroup% |
788 | \fi% |
789 | } |
790 | \let\@after@all\endgroup |
791 | \def\@prepare@after{% |
792 | \ifx\ag@cnt@local\ag@cnt@global\else% |
793 | \expandafter\@prepare@after@i% |
794 | \fi% |
795 | } |
796 | \def\@prepare@after@i#1{% |
797 | \@start@after@group% |
798 | \def\@after@all{\@@aftergroup#1\endgroup}% |
799 | } |
800 | \def\@after@aftertoken#1{% |
801 | \let\bgroup\relax\let\egroup\relax% |
802 | \toks@{#1}% |
803 | \futurelet\@let@token\@after@aftertoken@i% |
804 | } |
805 | \def\@after@aftertoken@i{% |
806 | \ifcat\noexpand\@let@token{% |
807 | \@@aftergroup{% |
808 | \else\ifcat\noexpand\@let@token}% |
809 | \@@aftergroup}% |
810 | \else% |
811 | \def\@tempa##1{\@@aftergroup##1\the\toks@}% |
812 | \expandafter\expandafter\expandafter\@tempa% |
813 | \fi\fi% |
814 | } |
815 | \endinput |
816 | %% |
817 | %% End of file `syntax.sty'. |