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-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-% 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 and Vafa Khalighi
-% persian-tex@tug.org
-%
-% 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
-%
-% This file copyright Victor Eijkhout and Vafa Khalighi.
-%
-%
-% This program is free software: you can redistribute it and/or modify
-% it under the terms of the GNU General Public License as published by
-% the Free Software Foundation, either version 3 of the License, or
-% (at your option) any later version.
-%
-% This program is distributed in the hope that it will be useful,
-% but WITHOUT ANY WARRANTY; without even the implied warranty of
-% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-% GNU General Public License for more details.
-%
-% You should have received a copy of the GNU General Public License
-% along with this program. If not, see <http://www.gnu.org/licenses/>.
-%
-%
-
-\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
-
-% a test of the special comments
-\newcount\comlines
-\specialcomment{countedcomment}
- {\comlines=-1\relax %note that the rest of the first line is also comment
- \def\ThisComment{\global\advance\comlines1\relax}}
- {\endgraf **Comment: \number\comlines\ line(s) removed**\endgraf}
-
-This is a line of text
-\countedcomment
-Oneline
-\endcountedcomment
-another line of text
-\countedcomment
-One line
-Two line
-Three line
-\endcountedcomment
-last line of text
-\end