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authorKarl Berry <karl@freefriends.org>2015-09-22 22:26:18 +0000
committerKarl Berry <karl@freefriends.org>2015-09-22 22:26:18 +0000
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parentf1f4767bbed8d529512166e9ebc17c398bf22888 (diff)
unravel (22sep15)
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-----------------------------------------------------------------
-unravel --- Watching TeX digest tokens
-E-mail: blflatex@gmail.com
-Released under the LaTeX Project Public License v1.3c or later
-See http://www.latex-project.org/lppl.txt
-----------------------------------------------------------------
-
-The unravel LaTeX package provides tools to explore TeX code,
-performing expansion and assignments step by step.
-
-TeX is a strange beast. Its eyes read files, making characters
-into tokens. Its mouth then chews tokens, expanding them if
-possible, namely, expanding user-defined macros, or conditionals,
-etc. When meeting a so called ``unexpandable'' token, TeX's
-stomach comes into play, performing assignments, or moving boxes
-around, eventually typesetting the result thanks to its great
-line- and page-breaking algorithms.
-
-All of this is interleaved, and difficult to follow. Of course,
-one can always use \tracingall, but the result is... messy.
-This package is an attempt to replicate how TeX digests tokens,
-and to make the process easier to follow. Namely,
-\unravel{\some\tokens} will let you go through expansions and
-assignments performed by TeX upon seeing of ``\some\tokens'',
-step by step.
-
-Some parts of TeX are not covered. In particular, category codes
-are fixed for the whole argument of \unravel when it is read.
-
-This package requires up-to-date versions of the l3kernel,
-l3packages, and l3experimental bundles.
-
-The package is extracted by running "pdflatex unravel.ins".
-For documentation, run "pdflatex unravel.dtx" twice. \ No newline at end of file