summaryrefslogtreecommitdiff
path: root/usergrps/uktug/baskervi/4_6/comment.sty
diff options
context:
space:
mode:
Diffstat (limited to 'usergrps/uktug/baskervi/4_6/comment.sty')
-rw-r--r--usergrps/uktug/baskervi/4_6/comment.sty98
1 files changed, 98 insertions, 0 deletions
diff --git a/usergrps/uktug/baskervi/4_6/comment.sty b/usergrps/uktug/baskervi/4_6/comment.sty
new file mode 100644
index 0000000000..388036153d
--- /dev/null
+++ b/usergrps/uktug/baskervi/4_6/comment.sty
@@ -0,0 +1,98 @@
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% Comment.sty version 3.0, 3 September 1992
+% selectively in/exclude pieces of text: the user can define new
+% comment versions, and each is controlled separately.
+% Special comments can be defined where the user specifies the
+% action that is to be taken with each comment line.
+%
+% This style can be used with plain TeX or LaTeX, and probably
+% most other packages too.
+%
+% Author
+% Victor Eijkhout
+% Department of Computer Science
+% University Tennessee at Knoxville
+% 104 Ayres Hall
+% Knoxville, TN 37996
+% USA
+%
+% eijkhout@cs.utk.edu
+%
+% Usage: all text included in between
+% \comment ... \endcomment
+% or \begin{comment} ... \end{comment}
+% is discarded. The closing command should appear on a line
+% of its own. No starting spaces, nothing after it.
+% This environment should work with arbitrary amounts
+% of comment.
+%
+% Other 'comment' environments are defined by
+% and are selected/deselected with
+% \includecomment{versiona}
+% \excludecoment{versionb}
+%
+% These environments are used as
+% \versiona ... \endversiona
+% or \begin{versiona} ... \end{versiona}
+% with the closing command again on a line of its own.
+%
+% Special comments are defined as
+% \specialcomment{name}{before commands}{after commands}
+% where the second and third arguments are executed before
+% and after each comment. By defining a control sequence
+% \Thiscomment##1{...} in the before commands the user can
+% specify what is to be done which each comment line.
+%
+% Basic approach:
+% to comment something out, scoop up every line in verbatim mode
+% as macro argument, then throw it away.
+% For inclusions, both the opening and closing comands
+% are defined as noop
+
+\def\makeinnocent#1{\catcode`#1=12 }
+\def\csarg#1#2{\expandafter#1\csname#2\endcsname}
+
+\def\TreatAsComment#1{\begingroup
+ \def\CurrentComment{#1}%
+ \let\do\makeinnocent \dospecials
+ \makeinnocent\^^L% and whatever other special cases
+ \endlinechar`\^^M \catcode`\^^M=12 \xComment}
+{\catcode`\^^M=12 \endlinechar=-1 %
+ \gdef\xComment#1^^M{\def\test{#1}
+ \csarg\ifx{PlainEnd\CurrentComment Test}\test
+ \def\next{\endgroup\AfterComment}%
+ \else \csarg\ifx{LolliEnd\CurrentComment Test}\test
+ \def\next{\endgroup\AfterComment}%
+ \else \csarg\ifx{LaLaEnd\CurrentComment Test}\test
+ \edef\next{\endgroup\noexpand\AfterComment
+ \noexpand\end{\CurrentComment}}
+ \else \ThisComment{#1}\let\next\xComment
+ \fi \fi \fi \next}
+}
+
+\def\includecomment
+ #1{\message{Including comment '#1'}%
+ \expandafter\def\csname#1\endcsname{}%
+ \expandafter\def\csname end#1\endcsname{}}
+\def\excludecomment
+ #1{\message{Excluding comment '#1'}%
+ \csarg\def{#1}{\let\AfterComment\relax
+ \def\ThisComment####1{}\TreatAsComment{#1}}%
+ {\escapechar=-1\relax
+ \csarg\xdef{PlainEnd#1Test}{\string\\end#1}%
+ \csarg\xdef{LolliEnd#1Test}{\string\\#1Stop}%
+ \csarg\xdef{LaLaEnd#1Test}{\string\\end\string\{#1\string\}}%
+ }}
+\long\def\specialcomment
+ #1#2#3{\message{Special comment '#1'}%
+ \csarg\def{#1}{\def\ThisComment{}\def\AfterComment{#3}#2%
+ \TreatAsComment{#1}}%
+ {\escapechar=-1\relax
+ \csarg\xdef{PlainEnd#1Test}{\string\\end#1}%
+ \csarg\xdef{LolliEnd#1Test}{\string\\#1Stop}%
+ \csarg\xdef{LaLaEnd#1Test}{\string\\end\string\{#1\string\}}%
+ }}
+\excludecomment{comment}
+
+\endinput
+