summaryrefslogtreecommitdiff
path: root/Master/texmf-dist/source/latex/environ/environ.dtx
blob: b6a047ca1a0d8074d2cf820e247eccde1e88c96b (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
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
% \iffalse 
%<*internal>
\iffalse
%</internal>
%<*readme>
___________________
The ENVIRON package
v0.2

Provides two things: a new way of defining
environments that read their contents before
processing; and, a \long version of amsmath's
\collect@body macro called \Collect@Body.

Here's an example:

  \NewEnviron{test}[3][]{"#1,#2,\BODY,#3"}
  \begin{test}[zero]{one}{last}
    three\par four
  \end{test}

Produces the equivalent of: 

  "zero,one,three\par four,last"

______________
Will Robertson
wspr 81 [at] gmail [dot] com

Copyright 2007-2014
Distributed under the LaTeX Project Public License
%</readme>
%<*internal>
\fi
\begingroup
%</internal>
%<*batchfile>
\input docstrip.tex
\keepsilent
\preamble

  __________________________________
  Copyright (C) 2007  Will Robertson

  License information appended.


\endpreamble
\postamble

Copyright (C) 2007-2014 by Will Robertson <wspr81@gmail.com>

Distributable under the LaTeX Project Public License,
version 1.3c or higher (your choice). The latest version of
this license is at: http://www.latex-project.org/lppl.txt

This work is "maintained" (as per LPPL maintenance status) 
by Will Robertson.

This work consists of the file  environ.dtx
          and the derived files environ.pdf,
                                environ.sty, and
                                environ.ins.

\endpostamble
\askforoverwritefalse
\generate{\file{\jobname.sty}{\from{\jobname.dtx}{package}}}
%</batchfile>
%<batchfile>\endbatchfile
%<*internal>
\generate{\file{\jobname.ins}{\from{\jobname.dtx}{batchfile}}}
\nopreamble\nopostamble
\generate{\file{README.txt}{\from{\jobname.dtx}{readme}}}
\generate{\file{dtx-style.sty}{\from{\jobname.dtx}{dtx-style}}}
\endgroup
\immediate\write18{makeindex -s gind.ist -o \jobname.ind  \jobname.idx}
\immediate\write18{makeindex -s gglo.ist -o \jobname.gls  \jobname.glo}
%</internal>
%
%<*driver>
\documentclass[a4paper]{ltxdoc}
\EnableCrossrefs
\CodelineIndex
\RecordChanges
%\OnlyDescription
\usepackage{dtx-style}
\begin{document}
  \DocInput{\jobname.dtx}
\end{document}
%</driver>
%
%
% \fi
%
% \GetFileInfo{\jobname.sty}
% \CheckSum{0}
% \makeatletter
%
% \title{A couple of things involving environments}
% \author{Will Robertson}
% \date{\filedate \qquad \fileversion}
%
% \maketitle
%
% \begin{abstract}
% \noindent This package provides two things, one for document authors and one for macro authors. For the document authors, a new method, \cs{NewEnviron}, fo defining environments that might be more convenient on occasion. And for the package writers, \pkg{amsmath}'s \cmd\collect@body\ command, and a long version of the same, \cmd\Collect@Body.
% \end{abstract}
%
% \section{Introduction}
%
% This packages provides new commands for defining environments:
%
% \begin{example}{}
% \NewEnviron{test}{%
%   \fbox{\parbox{1.5cm}{\BODY}}\color{red}
%   \fbox{\parbox{1.5cm}{\BODY}}}
% \begin{test}
%   par\par graf
% \end{test}
% \end{example}
% \cmd\RenewEnviron\ has the same syntax to redefine a pre-existing environment.
%
% \section{For the document author}
%
% \LaTeX's standard method of defining environments looks like this (ignoring arguments for now):
% \codeline \cmd\newenvironment\marg{name}\marg{pre code}\marg{post code} .
%
% The advantage to using environments is that their contents are not treated as a macro argument, so there are fewer restrictions on what can exist inside, and the processing can be more efficient for long pieces of document text.
%
% The disadvantage of environments is that sometimes you really do want to collect up their body and apply some sort of command to the whole thing. This package provides a way to define such environments: 
% \codeline \cmd\NewEnviron\marg{name}\marg{macro code}\oarg{final code} .\\
% You saw an example in the introduction; the body of the environment is contained within the macro |\BODY|, and \oarg{final code} is the code executed at |\end|\marg{name} (more on this later).
%
% \subsection{Environment arguments}
%
% If you want to use arguments to the environment, these are specified as usual:
% \codeline \cmd\NewEnviron\marg{name}\oarg{N.\,args}\oarg{opt.\,arg.}\marg{macro code}\oarg{final code} \\
% where \marg{macro code} has arguments |#1|, |#2|, \dots, as per traditional \LaTeX\ environment mandatory and optional arguments.
%
% Here's an example with two arguments; one optional argument (|#1|, which is |\today| if omitted) and one mandatory argument (|#2|):
%
% \begin{example}{}
% \NewEnviron{test}[2][\today]{%
%   \fbox{\parbox{3cm}{%
%     \textbf{#2}\\
%     \BODY\\
%     (#1)}}}
% 
% \begin{test}{Title}
%   par\par graf
% \end{test}
%
% \begin{test}[Yesterday]{Title}
%   par\par graf
% \end{test}
% \end{example}
%
% \subsection{\oarg{final code}} 
% This is the code executed at |\end|\marg{name} of the environment. 
% For the purposes of this package it is only designed (but is very useful indeed) for cleanup code such as space gobbling in the input text.
%
% \DescribeMacro{\environfinalcode}
% This macro sets a default value for the \oarg{final code} (unless manually specified) in each subsequent environment created with \cmd\NewEnviron. The default is to define each new environment postfixed by \cmd\ignorespacesafterend, like this:
% \codeline |\environfinalcode{\ignorespacesafterend}| \\
% Here's a silly example:
%
% \begin{example}{}
% \environfinalcode{(finish)}
% \NewEnviron{test}{\fbox{\parbox{3cm}{\BODY}}}
% \begin{test}
%   par\par
%   graf
% \end{test}
% \end{example}
%
% Careful, \cmd\environfinalcode\ cannot contain square brackets without first protecting them with braces (\eg, 
% |\environfinalcode{[end]}|
% will not work but 
% |\environfinalcode{{[end]}}|
% will). This is because the optional argument to \cmd\NewEnviron\ itself uses square brackets as argument delimiters.
%
% \subsection{The \cs{BODY} command}
%
% \DescribeMacro{\environbodyname}
% Using \cs{BODY} as the body of the environment might clash with a command defined by another package.
% To overcome such conflicts, rename this command with
% \codeline |\environbodyname|\cs{\meta{command}}\\
% at which point \cs{NewEnviron} will use \cs{\meta{command}} instead of \cs{BODY}.
% Here's an example:
%
% \begin{example}{}
% \NewEnviron{FOO}{\fbox{\BODY}}
% \environbodyname\envbody
% \NewEnviron{foo}{\fbox{\envbody}}
%
% \begin{FOO}FOO\end{FOO}
% \begin{foo}foo\end{foo}
% \end{example}
%
% \section{For the macro author} 
%
% The \pkg{amsmath} package contains a macro that facilitates the functionality in the previous section, which package writers may wish to use directly. The canonical command is \cmd\collect@body, which I've also defined in \cmd\long\ form to be useable for multi-paragraph environments (\cmd\Collect@Body). Here's how it's used:
%
% \begin{example}{}
% \long\def\wrap#1{[#1]}
% \newenvironment{test}{\Collect@Body\wrap}{}
% \begin{test}
%   hello
%
%   there
% \end{test}
% \end{example}
%
% And here's a crude example with environment arguments:
%
% \begin{example}{}
% \long\def\wrap#1{[\arg#1]}
% \def\arg#1{---#1---\par}
% \newenvironment{test}{\Collect@Body\wrap}{}
% \begin{test}{arg}
%   hello
%
%   there
% \end{test}
% \end{example}
%
% \newpage
% \section{Test}
%
% Here's an example or two to ensure everything that you'd think should work, in fact, does:
%
% \begin{example}{}
% \NewEnviron{test}{%
%   \fbox{\parbox{\linewidth-
%     0.1cm*\currentgrouplevel}{\BODY}}
%   \setlength\fboxrule{2\fboxrule}
%   \fbox{\parbox{\linewidth-
%     0.1cm*\currentgrouplevel}{``\BODY''}}}
%
% \begin{test}
%   outer\par
%   \def\tmp#1{*#1*}%
%   \tmp{aa}\par
%   \begin{test}
%     inner\par
%     \def\tmp#1{(#1)}\tmp{bb}
%   \end{test}
% \end{test}
% \end{example}
%
%
%% ^^A Test that \RenewEnvironment works correctly:
% \newenvironment{foobar}{}{}
% \RenewEnviron{foobar}{\BODY}
%
%
% \StopEventually{}
%
% \clearpage
% \part{\pkg{\jobname} implementation}
%\iffalse
%<*package>
%\fi
%
% This is the package.
%    \begin{macrocode}
\ProvidesPackage{environ}[2014/05/04 v0.3 A new way to define environments]
\RequirePackage{trimspaces}
%    \end{macrocode}
%
% \PrintChanges
%
% \section{Begin}
%
% \begin{macro}{\environbodyname}
% \darg{control sequence}
% Changes the control sequence used to represent the environment body in its definition. Not to be used as a user command; but maybe one day it will be. Don't change this after defining any |\NewEnviron| environments!
%    \begin{macrocode}
\def\environbodyname#1{\def\env@BODY{#1}}
\environbodyname\BODY
%    \end{macrocode}
% \changes{v0.3}{2015/05/04}{Works properly and now documented.}
% \end{macro}
%
% \begin{macro}{\environfinalcode}
% \darg{code}
% This is the \marg{code} that's executed by default at \cs{end}\marg{env.\,name}:
%    \begin{macrocode}
\def\environfinalcode#1{%
  \def\env@finalcode{#1}}
\environfinalcode{\ignorespacesafterend}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\longdef@c}
% \LaTeX3-inspired shorthands.
%    \begin{macrocode}
\def\longdef@c#1{%
  \expandafter\long\expandafter\def\csname#1\endcsname}
%    \end{macrocode}
% \end{macro}
%
% \section{\cs{collect@body}-related code}
%
% \begin{macro}{\collect@body}
% Now, \pkg{amsmath} defines \cmd\collect@body\ for us. But that package may not be loaded, and we don't want to have to load the whole thing just for this one macro.
%    \begin{macrocode}
\unless\ifdefined\collect@body
  \newtoks\@envbody
  \def\collect@body#1{%
    \@envbody{\expandafter#1\expandafter{\the\@envbody}}%
    \edef\process@envbody{\the\@envbody\noexpand\end{\@currenvir}}%
    \@envbody={}%
    \def\begin@stack{b}%
    \begingroup
    \expandafter\let\csname\@currenvir\endcsname\collect@@body
    \edef\process@envbody{%
      \expandafter\noexpand\csname\@currenvir\endcsname}%
    \process@envbody
  }
  \def\push@begins#1\begin#2{%
    \ifx\end#2\else 
      b\expandafter\push@begins
    \fi}
  \def\addto@envbody#1{%
    \global\@envbody\expandafter{\the\@envbody#1}}
  \def\collect@@body#1\end#2{%
    \edef\begin@stack{%
      \push@begins#1\begin\end \expandafter\@gobble\begin@stack}%
    \ifx\@empty\begin@stack
      \endgroup
      \@checkend{#2}%
      \addto@envbody{#1}%
    \else
      \addto@envbody{#1\end{#2}}%
    \fi
    \process@envbody}
\fi
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\Collect@Body}
% And now we define our own `long' version.
%    \begin{macrocode}
\long\def\Collect@Body#1{%
  \@envbody{\expandafter#1\expandafter{\the\@envbody}}%
  \edef\process@envbody{\the\@envbody\noexpand\end{\@currenvir}}%
  \@envbody={}%
  \def\begin@stack{b}%
  \begingroup
  \expandafter\let\csname\@currenvir\endcsname\Collect@@Body
  \edef\process@envbody{%
    \expandafter\noexpand\csname\@currenvir\endcsname}%
  \process@envbody
}
\long\def\Push@Begins#1\begin#2{%
  \ifx\end#2\else 
    b\expandafter\Push@Begins
  \fi}
\long\def\Addto@Envbody#1{%
  \global\@envbody\expandafter{\the\@envbody#1}}
\long\def\Collect@@Body#1\end#2{%
  \edef\begin@stack{%
    \Push@Begins#1\begin\end\expandafter\@gobble\begin@stack}%
  \ifx\@empty\begin@stack
    \endgroup
    \@checkend{#2}%
    \Addto@Envbody{#1}%
  \else
    \Addto@Envbody{#1\end{#2}}%
  \fi
  \process@envbody}
%    \end{macrocode}
% \end{macro}
%
% \section{User-level syntax}
% \begin{macro}{\RenewEnviron}
% \changes{v0.3}{2015/05/04}{Fixed for non-environ commands.}
% \begin{macro}{\NewEnviron}
% This is the new one.
%    \begin{macrocode}
\def\NewEnviron{%
  \let\env@newenvironment\newenvironment
  \env@NewEnviron}
\def\RenewEnviron{%
  \let\env@newenvironment\renewenvironment
  \env@NewEnviron}
%    \end{macrocode}
% \paragraph{Input argument parsing}
% The first optional argument:
%    \begin{macrocode}
\def\env@NewEnviron#1{%
  \@ifnextchar[
    {\env@new@i{#1}}
    {\env@new@iii{#1}{}}}
%    \end{macrocode}
% And the second:
%    \begin{macrocode}
\def\env@new@i#1[#2]{%
  \@ifnextchar[
    {\env@new@ii{#1}[#2]}
    {\env@new@iii{#1}{[#2]}}}
%    \end{macrocode}
% And the second: (cont.)
%    \begin{macrocode}
\def\env@new@ii#1[#2][#3]{%
  \env@new@iii{#1}{[#2][#3]}}
%    \end{macrocode}
% The final optional argument:
%    \begin{macrocode}
\long\def\env@new@iii#1#2#3{%
  \@temptokena={\env@new{#1}{#2}{#3}}%
  \@ifnextchar[{%
    \the\@temptokena
  }{%
    \expandafter\the\expandafter
      \@temptokena\expandafter[\env@finalcode]%
  }}
%    \end{macrocode}
% \paragraph{Environment creation code}
% \begin{macro}{\env@new}
% \darg{name of the environment}
% \darg{possible optional args (either `\meta{empty}' or `\texttt{[N]}' or `\texttt{[N][default]}')}
% \darg{environment code}
% \doarg{final code}
%    \begin{macrocode}
\long\def\env@new#1#2#3[#4]{%
%    \end{macrocode}
% Save the definition of \cs{env@BODY} so we know what to look for.
%    \begin{macrocode}
  \longdef@c{env@#1@BODY\expandafter}\expandafter{\env@BODY}%
%    \end{macrocode}
% Define the new environment to Collect its body and execute |env@#1@parse| on it.
%    \begin{macrocode}
  \env@newenvironment{#1}{%
    \expandafter\Collect@Body\csname env@#1@parse\endcsname
  }{#4}%
%    \end{macrocode}
% |env@#1@parse| executes the body twice: the first time to save the body while ignoring the arguments; and the second time to process the environment definition itself while ignoring the environment body:
%    \begin{macrocode}
  \longdef@c{env@#1@parse}##1{%
    \csname env@#1@save@env\endcsname##1\env@nil
    \csname env@#1@process\endcsname##1\env@nil}%
%    \end{macrocode}
% These must be defined on a per-environment basis in order to get the argument gobbling right: (because there are a variable number of arguments)
%    \begin{macrocode}
  \expandafter\let\csname env@#1@save@env\endcsname\relax
  \expandafter\let\csname env@#1@process\endcsname\relax
  \expandafter\newcommand
    \csname env@#1@save@env\endcsname#2{%
      \expandafter\expandafter\expandafter
        \env@save\csname env@#1@BODY\endcsname}%
  \expandafter\newcommand
    \csname env@#1@process\endcsname#2{#3\env@ignore}%
}
%    \end{macrocode}
% \end{macro}
% \begin{macro}{\env@save}
% If \cmd{\env@BODY} were variable, this macro would have to be saved for every environment definition individually; at the moment we just use a global definition.
% Use \cmd\trim@spaces\ to remove surrounding space:
%    \begin{macrocode}
\long\def\env@save#1#2\env@nil{%
  \edef#1{%
    \unexpanded\expandafter
      \expandafter\expandafter{\trim@spaces{#2}}}}
%    \end{macrocode}
% \end{macro}
% This is the same as a \cmd\@gobblenil\ but long and less likely to exist in the environment body:
%    \begin{macrocode}
\long\def\env@ignore#1\env@nil{}
%    \end{macrocode}
% \changes{v0.2}{2008/06/16}{Added.}
% \end{macro}
% \end{macro}
%
%\iffalse
%</package>
%\fi
%
%
%\iffalse
%<*dtx-style>
%    \begin{macrocode}
\ProvidesPackage{dtx-style}

\errorcontextlines=999

\def\@dotsep{1000}
\setcounter{tocdepth}{2}
\setlength\columnseprule{0.1pt}
\renewcommand\tableofcontents{\relax
  \begin{multicols}{2}[\section*{\contentsname}]\small
    \@starttoc{toc}\relax
  \end{multicols}}

\setcounter{IndexColumns}{2}
\renewenvironment{theglossary}
  {\small\list{}{}
     \item\relax
     \glossary@prologue\GlossaryParms 
     \let\item\@idxitem \ignorespaces 
     \def\pfill{\hspace*{\fill}}}
  {\endlist}

\usepackage{booktabs,calc,color,enumitem,fancyvrb,graphicx,ifthen,refstyle,subfig,varioref}
\expandafter\usepackage\expandafter{\jobname}

\usepackage{url}

\usepackage[sc,osf]{mathpazo}

\linespread{1.1}      % A bit more space between lines
\frenchspacing         % Remove ugly extra space after punctuation
  
\definecolor{niceblue}{rgb}{0.2,0.4,0.8}
\newenvironment{example}[1]
  {\VerbatimEnvironment
   \def\Options{#1}%
   \begin{VerbatimOut}[gobble=2]{\examplefilename}}
  {\end{VerbatimOut}\relax
   \typesetexample}

\fvset{formatcom=\color{niceblue}}
\DefineShortVerb{\|}

\def\theCodelineNo{\textcolor{niceblue}{\sffamily\tiny\arabic{CodelineNo}}}

\let\examplesize\normalsize
\let\auxwidth\relax

\newlength\examplewidth\newlength\verbatimwidth
\newlength\exoutdent   \newlength\exverbgap
\setlength\exverbgap{1em}
\setlength\exoutdent{-0.15\textwidth}
\newsavebox\verbatimbox
\edef\examplefilename{\jobname.example}

\newcommand\typesetexample{\relax
   \smallskip
   \noindent
   \begin{minipage}{\linewidth}
   \color{niceblue}
   \hrulefill\par
   \edef\@tempa{[gobble=0,fontsize=\noexpand\small,\Options]}%
   \begin{lrbox}{\verbatimbox}\relax
     \expandafter\BVerbatimInput\@tempa{\examplefilename}%
   \end{lrbox}
   \begin{list}{}{\setlength\itemindent{0pt}
                  \setlength\leftmargin\exoutdent
                  \setlength\rightmargin{0pt}}\item
   \ifx\auxwidth\relax
     \setlength\verbatimwidth{\wd\verbatimbox}%
   \else
     \setlength\verbatimwidth{\auxwidth}%
   \fi
   \begin{minipage}[c]{\textwidth-\exoutdent-\verbatimwidth-\exverbgap}
     \catcode`\%=14\centering\linespread{1.6}\input\examplefilename\relax
   \end{minipage}\hfill
   \begin{minipage}[c]{\verbatimwidth}
     \usebox\verbatimbox
   \end{minipage}
   \end{list}
   \par\noindent\hrulefill
   \end{minipage}\par
   \smallskip\noindent}

\newcommand*\setverbwidth[1]{\def\auxwidth{#1}}

\newcommand*\name[1]{{#1}}
\newcommand*\pkg[1]{\textsf{#1}}
\newcommand*\feat[1]{\texttt{#1}}
\newcommand*\opt[1]{\texttt{#1}}

\newcommand*\ltx[1]{%
  \ifx3#1\relax
    \textsc{ltx3}%
  \else
    \LaTeXe
  \fi}

\newcommand\note{\unskip\footnote}

\let\latin\textit
\def\eg{\latin{e.g.}}
\def\Eg{\latin{E.g.}}
\def\ie{\latin{i.e.}}
\def\etc{\@ifnextchar.{\latin{etc}}{\latin{etc.}\@}}

\def\STIX{\textsc{stix}}
\def\MacOSX{Mac~OS~X}
\def\ascii{\textsc{ascii}}
\def\OMEGA{Omega}
\def\CTAN{\textsc{ctan}}

\newcounter{argument}
\g@addto@macro\endmacro{\setcounter{argument}{0}}
\newcommand*\darg[1]{%
  \stepcounter{argument}%
  {\ttfamily\char`\{\char`\#\theargument\char`\}:~}#1\par\noindent\ignorespaces}
\newcommand*\doarg[1]{%
  \stepcounter{argument}%
  {\ttfamily[\char`\#\theargument]:~}#1\par\noindent\ignorespaces}

\def\codeline{\par\hspace{0.5\parindent}}

\newcommand\unichar[2]{\textsc{\MakeLowercase{u+#1: #2}}}

\setlength\parindent{2em}

%    \end{macrocode}
%</dtx-style>
%\fi
%
% \typeout{*************************************************************}
% \typeout{*}
% \typeout{* To finish the installation you have to move the following}
% \typeout{* file into a directory searched by TeX:}
% \typeout{*}
% \typeout{* \space\space\space environ.sty}
% \typeout{*}
% \typeout{*************************************************************}
%
\endinput