summaryrefslogtreecommitdiff
path: root/macros/latex/contrib/lmake/lmake.dtx
blob: f8298099f8cd7f906b3260ee8a86fe9d06c76acb (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
% \iffalse meta-comment
%
% Copyright (C) 2012 by Shengjun Pan <panshengjun@gmail.com>
% -------------------------------------------------------
% 
% This file may be distributed and/or modified under the
% conditions of the LaTeX Project Public License, either version 1.2
% of this license or (at your option) any later version.
% The latest version of this license is in:
%
%    http://www.latex-project.org/lppl.txt
%
% and version 1.2 or later is part of all distributions of LaTeX 
% version 1999/12/01 or later.
%
% \fi
%
% \iffalse
%<*driver>
\ProvidesFile{lmake.dtx}
%</driver>
%<package>\NeedsTeXFormat{LaTeX2e}[1999/12/01]
%<package>\ProvidesPackage{lmake}
%<*package>
    [2012/02/29 v1.0 .dtx lmake file]
%</package>
%
%<*driver>
\documentclass{ltxdoc}
\usepackage{amsmath,amssymb}
\usepackage[width=5.5in,height=8.6in]{geometry}
\usepackage{multirow}
\usepackage{graphicx}
\usepackage{makeidx}
\usepackage[usenames]{color}
\usepackage{lmake}[2012/02/29]
\EnableCrossrefs         
\CodelineIndex
\RecordChanges
\begin{document}
  \DocInput{lmake.dtx}
  \PrintChanges
  \PrintIndex
\end{document}
%</driver>
% \fi
%
% \CheckSum{412}
%
% \CharacterTable
%  {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
%   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
%   Digits        \0\1\2\3\4\5\6\7\8\9
%   Exclamation   \!     Double quote  \"     Hash (number) \#
%   Dollar        \$     Percent       \%     Ampersand     \&
%   Acute accent  \'     Left paren    \(     Right paren   \)
%   Asterisk      \*     Plus          \+     Comma         \,
%   Minus         \-     Point         \.     Solidus       \/
%   Colon         \:     Semicolon     \;     Less than     \<
%   Equals        \=     Greater than  \>     Question mark \?
%   Commercial at \@     Left bracket  \[     Backslash     \\
%   Right bracket \]     Circumflex    \^     Underscore    \_
%   Grave accent  \`     Left brace    \{     Vertical bar  \|
%   Right brace   \}     Tilde         \~}
%
%
% \changes{v1.0}{\filedate}{Initial version}
%
% \GetFileInfo{lmake.dtx}
%
% \DoNotIndex{\newcommand,\newenvironment}
% \DoNotIndex{\#,\$,\%,\&,\@,\\,\{,\},\^,\_,\~,\ }
% \DoNotIndex{\def,\edef,\if,\else,\fi,\begingroup,\endgroup}
% \DoNotIndex{\@ifpackageloaded,\advance,\cdots,\csname,\endcsname}
% \DoNotIndex{\dotsb,\dotsc,\empty,\end,\expandafter,\global}
% \DoNotIndex{\i,\ifcase,\ifnum,\ifx,\or,\relax,\string,\the,\let}
% \DoNotIndex{\ldots,\newcount,\newif,\noexpand,\protected@edef}
% 
%
% \title{The \texttt{lmake} package\thanks{This document
%   corresponds to \texttt{lmake}~\fileversion, dated \filedate.}}
% \author{Shengjun Pan \\ \texttt{panshengjun@gmail.com}}
% \date{}
% \maketitle
% \newcommand{\bs}{\char`\\}
% \newcommand{\us}{\char`\_}
% \newcommand{\ur}{\char`\^}
% \renewcommand{\arraystretch}{1.2}
% \setlength{\fboxsep}{1ex}
% \definecolor{lightGray}{rgb}{0.85,0.85,0.85}
% \definecolor{lightBlue}{rgb}{0.75,0.75,1}
% \noindent\hspace*{-0.075\textwidth}\colorbox{lightGray}{\begin{minipage}{1.15\textwidth}
% \[
% \lcmd{\hat}{h}{X,A,B,F,\mu,\phi,\sigma}
% \lmake[\int_{\hX_\i=\hA_\i}^{\hB_\i},\empty]
% \binom{N}{\lmake[\i\hphi_\i,,m]}
% \lmake[e^{-\frac{(\hX_\i-\hmu_\i)^2}{2\hsigma_\i^2}},c=]
% \lmake[d\hX_\i,\,]
% \]
% \tt
% \bs lcmd\{\bs hat\}\{h\}\{X,A,B,F,\bs mu,\bs phi,\bs sigma\}\\
% \bs lmake[\bs in\us\{\bs hX\us\bs i=\bs hA\us\bs i\}\ur\{\bs hB\us\bs i\},\bs empty]\\
% \bs binom\{N\}\{\bs lmake[\bs i\bs hphi\us\bs i,,m]\}\\
% \bs lmake[e\ur\{-\bs frac\{(\bs hX\us\bs i-\bs hmu\us\bs i)\ur2\}\{2\bs hsigma\us\bs i\ur2\}\},c=]\\
% \bs lmake[d\bs hX\us\bs i,\bs,]
% \end{minipage}}
% \section{Introduction}
% This package provides macros for \LaTeX2e to simplify typesetting a
% list of phrases that fit a pattern.\\
% \begin{tabular}{ll}
% \tt \char`\\lcmd
%   & makes a list of new commands by adding a prefix to existing
%     commands.\\
% \tt\char`\\lmake
%   & makes a list of the form $p(i_1),p(i_2),\dotsc,p(i_n)$, where
%     $p(.)$ stands for \emph{pattern}.
% \end{tabular}
% \section{Usage and examples}
% \label{sec:usage}
% \DescribeMacro{\lcmd}
% \fcolorbox{black}{lightBlue}{\tt \char`\\lcmd\{command\}\{prefix\}\{list\}}\\[2ex]
% makes a list of new commands from \texttt{command} by adding \texttt{prefix}
% to each item in the comma-separated \texttt{list}. If an item in the
% list is a macro, only its name is prefixed; the backslash is stripped away.\\[3ex]
% \textbf{Examples}:
% \footnote{The examples used in this document require packages {\tt amsmath,
%   amssymb} and {\tt graphicx}.}\\[1ex]
% \lcmd{\mathcal}{c}{A,X,P}
% \lcmd{\mathbb}{bb}{Z,R,E}
% \lcmd{\overline}{vct}{x,\phi,psi}
% \begin{tabular}{l@{ defines: }lll}
% \hline
% \verb|\lcmd{\mathcal}{c}{A,X,P}|
%   &\texttt{\char`\\ cA} $\to \cA$
%   &\texttt{\char`\\ cX} $\to \cX$
%   &\texttt{\char`\\ cP} $\to \cP$
% \\
% \verb|\lcmd{\mathbb}{c}{A,X,P}|
%   &\texttt{\char`\\ bbZ} $\to \bbZ$
%   &\texttt{\char`\\ bbR} $\to \bbR$
%   &\texttt{\char`\\ bbE} $\to \bbE$\\
% \verb|\lcmd{\overline}{vct}{x,psi,\phi}|
%   &\texttt{\char`\\ vctx} $\to \vctx$
%   &\texttt{\char`\\ vctpsi} $\to \vctpsi$
%   &\texttt{\char`\\ vctphi} $\to \vctphi$\\
% \hline
% \end{tabular}\\[2ex]
% In the last example the new command for \verb|\phi| is
% \verb|\vctphi|, not \verb|\vct\phi|. Notice the difference between
% \verb|\vctphi| and \verb|\vctpsi|.\\[4ex]
% \DescribeMacro{\lmake}
% \fcolorbox{black}{lightBlue}{\tt\bs lmake[[key1=]value1,[key2=]value2,...]}\\[2ex]
%  makes a list of symbols by key-value pairs. Valid keys are
%  described in the following table.\\[3ex]
% \begin{tabular}{@{\tt }rll}
% \hline
% keys & default & description\\
% \hline
% p & \verb|\i| & Pattern. All occurrences of \verb|\i| will be replaced
% by the corresponding index.\\
% c & \verb|,| & Separator.\\
% n &\verb|n| & Last index.\\
% 1 & \verb|1| & First index.\\
% 2 & \verb|2| & Second index.\\
% d & \verb|\ldots|, \verb|\cdots| & Dots. If the separator is comma,
% \verb|\ldots| is used; otherwise \verb|\cdots| is used.\\
%   & \verb|\dotsc|, \verb|\dotsb| & If \verb|amsmath| is loaded,
%   \verb|\dotsc| and \verb|\dotsb| are used respectively.\\
% $\ell$ & \verb|{}| & List of comma-separated symbols.\\
% \hline
% \end{tabular}\\[3ex]
% \textbf{Examples}:\\[1ex]
% \begin{tabular}{ll}
% \hline
% what you type & what you see\\
% \hline
% \verb|\lmake[]| & $\lmake[]$\\
% \verb|\lmake[2=]| & $\lmake[2=]$\\
% \verb|\lmake[x_\i,c=]| & $\lmake[x_\i,c=]$\\
% \verb|\lmake[x_\i,,N]| & $\lmake[x_\i,,N]$\\
% \verb|\lmake[x_\i,\ge,k]| & $\lmake[x_\i,\ge,k]$\\
% \verb|\lmake[\bar x_{\i},\circ,1=i,i+1]| & $\lmake[\bar x_{\i},\circ,1=i,i+1]$\\
% \verb|\lmake[p_\i^{\mu_\i},c=,m]| & $\lmake[p_\i^{\mu_\i},c=,m]$\\
% \verb|\lmake[N_\i!,\,,\Gamma,\alpha,\beta]| & $\lmake[N_\i!,\,,\Gamma,\alpha,\beta]$\\
% \verb|\lmake[\left(\frac{\i}{\i+1}\right),\!]|
% & $\lmake[\left(\frac{\i}{\i+1}\right),\!]$\\
% \verb|\lmake[(e_\i+1),c=,k,1,2]| & $\lmake[(e_\i+1),c=,k,1,2]$\\[1ex]
% \verb|\lmake[x_{\i},l={1,3,5,11}]|
% & $\lmake[x_{\i},l={1,3,5,11}]$\\
% \verb|\lmake[\rotatebox{-30}{\i},\to,l={A,B,C,D}]|
% & $\lmake[\rotatebox{-30}{\i},\to,l={A,B,C,D}]$\\
% \hline
% \end{tabular}\\[2ex]
% \emph{Remarks:}
% \begin{itemize}
% \item If $\tt \ell$ is empty, the resulting list has the following form:\\
% \verb|p(1) c p(2) c d c p(n)|
%
% If $\tt \ell$ is not empty, the resulting list has the
%   following form, for the example $\tt \ell=\{x,y,z,u\}$:\\
% \verb|p(x) c p(y) c p(z) c p(u)|
% \item A \underline{non-empty item without \texttt{=}} in the argument
%   list is treated as a value. Normally the key-value pairs can appear
%   out of order in the argument list to \verb|\lmake|. For fast typing
%   the key can be omitted. The missing key is searched, starting from
%   the key that would follow the previous key in the table-order. Only
%   keys without values are searched.
%
%   For example, in \verb|\lmake[\bar x_{\i},\circ,1=i,i+1]|, the
%   missing key for \verb|\bar x_{\i}| is \verb|p|, the missing key for
%   \verb|\circ| is \verb|c| since it follows \verb|p| in the
%   table. Similarly, the missing key for \verb|i+1| is \verb|2| since
%   it follows the previous key \verb|1| in the able.
% \item A key not appearing or skipped in the argument list takes its
%   default value, unless it's been searched as a missing key and given
%   a value.
% 
%   For example, in \verb|\lamke[x_\i,,N]|, all keys except for \verb|p|
%   and \verb|n| take default values. Particularly, the key \verb|c| is
%   skipped and it is treated as missing.
% 
%   Note that a skipped key does not take value \emph{empty}. To force a
%   value to be empty, use one of the following workarounds:
%   {\tt \char`\\empty}, {\tt key=}, {\tt key=\char`\\empty}, or {\tt
%     key=\{\}}.
% \end{itemize}
%
% \StopEventually{}
%
% \section{Implementation}
% This section explains in details how verb|\lmake|, \verb|\lcmd| and
% necessary internal macros are implemented.
% \begin{macro}{\L@Compare}
% \verb|\L@Compare{string1}{string2}|\\
% compares two strings. The two arguments are fully expanded before compassion.
% \verb|\ifL@Equal| is a Boolean variable for storing the result.
%    \begin{macrocode}
\newif\ifL@Equal
\def\L@Compare#1#2{%
    \protected@edef\L@a{#1}\protected@edef\L@b{#2}%
    \ifx\L@a\L@b\L@Equaltrue\else\L@Equalfalse\fi}
%    \end{macrocode}
% \end{macro}
% \begin{macro}{\L@FuzzyCompare}
% \verb|\L@FuzzyCompare{string1}{string2}|\\
% tests if two strings are the same, where white spaces preceding the
% second argument are ignores. This allows flexible writing of
% the comma-separated argument to \verb|\lmake| so that spaces may be inserted
% between an item and the previous comma.
%    \begin{macrocode}
\def\L@FuzzyCompare#1#2{%
    \L@Compare{#1}{#2}\ifL@Equal\else\L@Compare{#1}{ #2}\fi}
%    \end{macrocode}
% \end{macro}
% \begin{macro}{\L@SoftCompare}
%   \verb|\L@SoftCompare{string1}{string2}|\\
%   similar to \verb|\L@Compare|, but does not expand the two
%   strings. This is usefully if either argument contains undefined
%   macros, for example, the value to the key \verb|p| in the argument to \verb|\lmake|.
%    \begin{macrocode}
\def\L@SoftCompare#1#2{%
    \def\L@a{#1}\def\L@b{#2}%
    \ifx\L@a\L@b\L@Equaltrue\else\L@Equalfalse\fi}
%    \end{macrocode}
% \end{macro}
% \begin{macro}{\L@FuzzySoftCompare}
% \verb|\L@FuzzySoftCompare{string1}{string2}|\\
% similar to \verb|L@FuzzyCompare|, but uses \verb|\L@SoftCompare|
% instead of \verb|\L@Compare|.
%    \begin{macrocode}
\def\L@FuzzySoftCompare#1#2{%
    \L@SoftCompare{#1}{#2}\ifL@Equal\else\L@SoftCompare{#1}{ #2}\fi}
%    \end{macrocode}
% \end{macro}
% \begin{macro}{\L@HasEqualSign}
%   \verb|\L@HasEqualSign{string}|\\
%   tests if a string has an equal sign \verb|=|. This is used to test
%   if an argument to \verb|\lmake| is a key-value pair or just a
%   value. It is defined indirectly via \verb|\L@HES|, which is a tail
%   recursion for scanning the tokens in its argument.\\[1ex]
%   \verb|\L@Ignore| is an auxiliary macro that simply ignores its
%   argument. The test result is stored in \verb|\ifL@HasEqualSign|.
%    \begin{macrocode}
\def\L@Ignore#1\end{}
\newif\ifL@HasEqualSign
\def\L@HasEqualSign#1{%
    \L@HasEqualSignfalse\L@HES#1\end}
\def\L@HES#1{%
    \ifx#1=\L@HasEqualSigntrue\let\L@Next=\L@Ignore%
    \else\ifx#1\end\let\L@Next=\relax\else\let\L@Next=\L@HES\fi%
    \fi\L@Next}
%    \end{macrocode}
% \end{macro}
% \begin{macro}{\L@ArName}
% \verb|\L@ArName[index]|\\
% returns the name of a macro via a numeric index.
%    \begin{macrocode}
\def\L@ArName[#1]{\ifcase#1 L@Pattern\or L@Comma\or L@Last\or%
L@First\or L@Second\or L@Dots\or L@List\else L@Other\fi}
%    \end{macrocode}
% \end{macro}
% \begin{macro}{\L@Set,\L@Get}
% \verb|\L@Set[index]=value;|\\
% \verb|\L@Get[Index]|\\
% set and get the value of a macro by a numeric index. Numeric indices are
% used to locate missing keys in the argument to \verb|\lmake|.
%    \begin{macrocode}
\def\L@Set[#1]=#2;{\global\expandafter\let\csname\L@ArName[#1]\endcsname=#2}
\def\L@Get[#1]{\csname\L@ArName[#1]\endcsname}
%    \end{macrocode}
% \end{macro}
% \begin{macro}{\L@LDots,\L@Cdots}
% denotes the default macro for low dots. If \verb|amsmath| is loaded before
% \verb|\lmake|, \verb|\L@LDots| is set to \verb|\dotsc| and
% \verb|\L@Cdots| is set to \verb|\dotsb|. Otherwise \verb|\L@LDots|
% is set to \verb|\ldots| and \verb|\L@Cdots| is set to \verb|\cdots|.
%    \begin{macrocode}
\@ifpackageloaded{amsmath}
    {\def\L@Ldots{\dotsc}\def\L@Cdots{\dotsb}}
    {\def\L@Ldots{\ldots}\def\L@Cdots{\cdots}}
%    \end{macrocode}
% \end{macro}
% \begin{macro}{\L@Map}
%   \verb|\L@Map{function}{list}{new separator}|\\
%   maps a list of comma-separated items to a new list, so that each
%   item is transformed using the given function, and the commas are
%   replaced with the new separator. It is defined indirectly
%   indirectly via \verb|\L@Iterate|, which is a tail recursion for
%   scanning the comma-separated list.\\[1ex]
%   \verb|\ifL@Start| is used to indicate if the current item is the
%   first item, which is not preceded by a comma, unlike the remaining
%   items.\\[1ex]
%   \verb|\L@Map|
%    \begin{macrocode}
\newif\ifL@Start
\def\L@Map#1#2#3{%
    \def\L@Sym{\empty}\def\LM@Func{#1}\def\L@Sep{#3}%
     \L@Starttrue\expandafter\L@Iterate#2,\end}
\def\L@Iterate#1,#2{%
    \LM@Func{#1}%
    \ifx#2\end\let\L@Next=\relax\def\L@Nextarg{\empty}%
    \else\L@Sep\let\L@Next=\L@Iterate\def\L@Nextarg{#2}\fi%
    \expandafter\L@Next\L@Nextarg}
%    \end{macrocode}
% \end{macro}
% \begin{macro}{\L@GetKeyValue}
% \verb|\L@GetKeyValue{key-value pair}|\\
% extracts the key and value from a string, and store them in
% \verb|\L@Key| and \verb|\L@Value| respectively. If the argument has no
% equal sign, it is used as a value and the key is set to empty. Otherwise,
% \verb|\L@GetKV| is called to extract the key and value.
%    \begin{macrocode}
\def\L@GetKeyValue#1{%
    \def\L@Key{}\def\L@Value{}\L@HasEqualSign{#1}%
    \ifL@HasEqualSign\L@GetKV#1\end%
    \else\def\L@Key{}\def\L@Value{#1}%
    \fi}
\def\L@GetKV#1=#2\end{%
    \def\L@Key{#1}\def\L@Value{#2}}
%    \end{macrocode}
% \end{macro}
% \begin{macro}{\L@Parse}
% \verb|\L@Parse{list}|\\
% parses a list of comma-separated items, extracts each item,
% extract its key and value, looks for keys \verb|p|, \verb|c|,
% \verb|n|, \verb|1|, \verb|2|, \verb|d| and \verb|l|, and finally assigns the
% corresponding values to \verb|\L@Pattern|, \verb|\L@Comma|,
% \verb|\L@Last|, \verb|\L@First|, \verb|\l@Second|, \verb|\L@Dots|
% and \verb|\L@List| respectively.\\[1ex]
% The counter \verb|\L@idx| is the index of the next key yet to be assigned
% with an value.
%    \begin{macrocode}
\newcount\L@idx
%    \end{macrocode}
% If the list is not empty, then it calls a tail recursion \verb|\l@PRS|.
%    \begin{macrocode}
\def\L@Parse#1{\L@idx=0%
    \L@FuzzySoftCompare{#1}{}%
    \ifL@Equal\else\def\L@Extra{}\L@PRS#1,\end,\fi}
%    \end{macrocode}
% An artificial item \verb|,\end,|
% is added to the end of the actual list, which terminates the
% recursion when encountered.
%    \begin{macrocode}
\def\L@PRS#1,{%
    \L@SoftCompare{#1}{\end}\ifL@Equal%
        \let\L@Next=\relax%
    \else%
%    \end{macrocode}
% If an item is empty, the missing key is searched and
% the corresponding default value is used.
%    \begin{macrocode}
        \L@FuzzySoftCompare{#1}{}\ifL@Equal%
            \ifnum\L@idx<7%
                \ifcase\the\L@idx%
                    \def\L@Default{\i}%
                    \or\def\L@Default{,}%
                    \or\def\L@Default{n}%
                    \or\def\L@Default{1}%
                    \or\def\L@Default{2}%
                    \or\def\L@Default{}%
                    \or\def\L@Default{}%
                \fi%
                \L@Set[\the\L@idx]=\L@Default;%
                \advance \L@idx by 1%
            \fi%
%    \end{macrocode}
% If the item is not empty, the key and value are extracted. Depending
% on what the key is, the value is assigned to the approximate macro.
%    \begin{macrocode}
        \else%
            \L@GetKeyValue{#1}\let\L@CV=\L@Value%
            \L@FuzzyCompare{\L@Key}{p}\ifL@Equal\L@idx=1\L@Set[0]=\L@CV;%
            \else\L@FuzzyCompare{\L@Key}{c}\ifL@Equal\L@idx=2\L@Set[1]=\L@CV;%
            \else\L@FuzzyCompare{\L@Key}{n}\ifL@Equal\L@idx=3\L@Set[2]=\L@CV;%
            \else\L@FuzzyCompare{\L@Key}{1}\ifL@Equal\L@idx=4\L@Set[3]=\L@CV;%
            \else\L@FuzzyCompare{\L@Key}{2}\ifL@Equal\L@idx=5\L@Set[4]=\L@CV;%
            \else\L@FuzzyCompare{\L@Key}{d}\ifL@Equal\L@idx=6\L@Set[5]=\L@CV;%
            \else\L@FuzzyCompare{\L@Key}{l}\ifL@Equal\L@idx=7\L@Set[6]=\L@CV;%
%    \end{macrocode}
% If an item is a value without a key, the missing key is searched and
% given the current value.
%    \begin{macrocode}
            \else\L@FuzzyCompare{\L@Key}{}\ifL@Equal%
                 \ifnum\L@idx<7%
                     \L@Set[\the\L@idx]=\L@CV;%
                 \fi%
                 \advance \L@idx by 1%
            \fi\fi\fi\fi\fi\fi\fi\fi\fi%
            \let\L@Next=\L@PRS%
         \fi%
         \L@Next}
%    \end{macrocode}
% \end{macro}
% \begin{macro}{\lmake}
%   \verb|\lmake[key-value list]|\\
%   makes a list of symbols using the given key-value
%   pairs. \verb|\ifL@FoundFirst| is used to indicate if the first
%   non-empty symbol is encountered; the first symbol is not preceded
%   by a separator.
%    \begin{macrocode}
\newif\ifL@FoundFirst
%    \end{macrocode}
% \verb|\L@Parse| is used twice. The first time it is used to set the
% default values. The second time it is used to set the values
% supplied by the argument list.
%    \begin{macrocode}
\newcommand{\lmake}[1][]{%
\begingroup%
    \L@Parse{p=\i,c={,},d=,1=1,2=2,n=n,l=}%
    \L@Parse{#1}%
%    \end{macrocode}
% The pattern is used to define the transforming function
% \verb|\L@Func| by replacing all occurrences of \verb|\i| by the
% actual argument.
%    \begin{macrocode}
    \def\L@Func##1{\def\i{##1}\L@Get[0]}%
%    \end{macrocode}
% If the key \verb|d| is not given a value, its value is automatically determined by
% the value of the separator.
%    \begin{macrocode}
    \L@Compare{\L@Dots}{\empty}\ifL@Equal%
        \L@Compare{\L@Comma}{,}\ifL@Equal%
            \def\L@Dots{\L@Ldots}\else\def\L@Dots{\L@Cdots}%
        \fi
    \fi
%    \end{macrocode}
% The last step is to typeset the list of symbols. If the value to the key $\ell$ is
% missing, the typeset list starts with two symbols followed by the dots and
% ends with the last symbol. The symbols and dots are separated by the
% separator.
%    \begin{macrocode}
    \L@Compare{\L@List}{\empty}\ifL@Equal%
        \L@FoundFirstfalse%
         \L@Compare{\L@First}{\empty}\ifL@Equal\else%
             \L@Func{\L@First}\L@FoundFirsttrue%
         \fi%
         \L@Compare{\L@Second}{\empty}\ifL@Equal\else%
             \ifL@FoundFirst\L@Comma\fi%
             \L@Func{\L@Second}\L@FoundFirsttrue%
         \fi%
         \L@Compare{\L@Dots}{\empty}\ifL@Equal\else%
             \ifL@FoundFirst\L@Comma\fi\L@Dots%
         \fi%
         \L@Compare{\L@Last}{\empty}\ifL@Equal\else%
             \L@Comma\L@Func{\L@Last}%
         \fi%
%    \end{macrocode}
% If a non-empty value to the key $\ell$ is given, the typeset list
% consists of symbols from the items in the value of $\ell$,
% transformed by the pattern function.
%    \begin{macrocode}
     \else%
         \L@Map{\L@Func}{\L@List}{\L@Comma}%
     \fi%
\endgroup}
%    \end{macrocode}
% \end{macro}
% \begin{macro}{\L@CmdName}
% \verb|\L@CmdName{string}|\\
% returns the string itself if it is not a macro, otherwise returns
% the macro name with the backslash stripped away. This is an
% auxiliary function to \verb|\lcmd|.
%    \begin{macrocode}
\def\L@CmdName#1{%
    \if\noexpand#1\noexpand\L@anycmd\expandafter\L@StripFirst\string#1\else#1\fi}
\def\L@StripFirst#1#2{#2}
%    \end{macrocode}
% \end{macro}
% \begin{macro}{\lcmd}
% \verb|\lcmd{command}{prefix}{list}|\\
% makes a list of new commands. See Section~\ref{sec:usage} for more details.
%    \begin{macrocode}
\def\lcmd#1#2#3{%
    \def\L@MakeCmd##1{%
        \expandafter\def\csname #2\L@CmdName##1\endcsname{#1{##1}}}%
     \L@Map{\L@MakeCmd}{#3}{}}
%    \end{macrocode}
% \end{macro}
% \Finale
\endinput