New CTAN package: bitelist
CTAN Announcements
ctan-ann at dante.de
Thu Mar 29 18:35:30 CEST 2012
On Thu, 29 Mar 2012 Uwe Lück submitted the
bitelist
package.
Summary description: split list at list inside in TeX's mouth
License type: lppl
Announcement text:
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`bitelist.sty' provides commands for "splitting" a token list
at the first occurrence of a contained token list. I.e., for given
token lists s, t return b and shortest a, such that t = a s b.
As opposed to other packages providing similar features,
(i) the method uses TeX's mechanism of reading delimited macro
parameters;
(ii) the splitting macros work by pure expansion, without
assignments, provided the macro doing the search has been
defined before processing (e.g., a file);
(iii) instead of using one macro for a "substring" test and another
one to replace the "substring"--which includes extracting
corresponding prefix and suffix--, the *same* macro that
detects the occurrence returns the split;
(iv) e-TeX is not required.
(And LaTeX is not required.) This improves `fifinddo.sty' (v0.51).
An elaborated approach (additionally to a simpler one) is provided
that does not loose outer braces of prefix/suffix.
"Substring" detection and "string" replacement are (implicitly)
included with respect to certain representations of characters by tokens.
Counting occurrences and "global" replacement could be achieved
by applying the operation to earlier results, etc.--so
this approach seems to be "fundamental" for a certain larger
set of list analysis tasks.
The documentation aims to prove the correctness of the methods
with mathematical rigour.
KEYWORDs: macro programming, text filtering, substrings
RELATED PACKAGEs: datatool, stringstrings, ted, texapi, xstring
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This package is located at
http://mirror.ctan.org/macros/generic/bitelist
. More information is at
http://www.ctan.org/pkg/bitelist
(if the package is new it may take a day for that information to
appear). We are supported by the TeX Users Group http://www.tug.org .
Please join a users group; see http://www.tug.org/usergroups.html .
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Thanks for the upload.
For the CTAN Team
Rainer Schöpf
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