CTAN Comprehensive TeX Archive Network

CTAN update: expl3

Date: September 26, 2010 1:08:00 PM CEST
the daemon cryeth: > ====================================================================== > > The following information was provided by the package's contributor. > > Name of contribution: expl3 > Author's name: The LaTeX Project > Author's email: latex-team at latex-project.org > Location on CTAN: /macros/latex/contrib/expl3/ > Summary description: Low-level LaTeX3 programming conventions > License type: lppl > > Announcement text given by the package's contributor: > ---------------------------------------------------------------------- > ---------------------------------------------------------------- > This release (SVN 2047) > ---------------------------------------------------------------- > > This release addresses a number of specific issues with the > expl3 system. Some of these are not back-compatible, but are > needed to improve the overall structure and reliability of > expl3. > > When used with LuaTeX, expl3 includes support for category > code tables. This support was used experimentally in setting > \ExplSyntaxOn and \ExplSyntaxOff, but this leads to unexpected > issues. This decision has therefore been reversed: category > code setting by expl3 itself is the same with all engines. > > The choice of quarks as delimiters has been tidied up. These > changes are internal, but may show up with existing code that > uses internal functions. A particular case is \tl_head:w and > \tl_tail:w, which are now delimited by \q_stop (and not > \q_nil as earlier). > > Prompted by the LuaTeX-specific issue mentioned above, the > team has revised the use of other primitives inside expl3. > Variation in behaviour between different engines is not > desirable for the successful application of expl3. As a result, > the team have decided to require the functionality of the > \pdfstrcmp primitive. This means that the minimum engine > requirements for expl3 are now: > - pdfTeX 1.30 or later > - XeTeX 0.9994 or later > - LuaTeX 0.40 or later (0.60 or later strongly recommended) > > The \tl_if_eq:nn(TF) family of comparisons have been heavily > revised. There are now two distinct families: > - \tl_if_eq:nn(TF), a set of non-expandable functions which > compare the two input token lists on a token basis. > - \str_if_eq:nn(TF), a set of expandable functions which > compare the two inputs on string (category-code independent) > basis. > Variants of these functions have also been revised: programmers > will need to check their code with the new implementation. > > Looking ahead, there may be more revisions of specific points > as the code is more widely used as as particular issues are > addressed. An effort to formalise the documentation will begin > shortly, and so another update is likely to take place before > November. > ---------------------------------------------------------------------- thanks for the upload; i have installed the replacement files, and updated the catalogue repository. > Users may view the package catalogue entry at > http://www.tex.ac.uk/tex-archive/help/Catalogue/entries/expl3.html > or they may browse the package directory at > http://www.tex.ac.uk/tex-archive/macros/latex/contrib/expl3/ the catalogue entry on the web will change a bit overnight tonight. Robin Fairbairns For the CTAN team

expl3 – Wrapper package for experimental 3

The package serves as a wrapper for other packages that make up the 3 kernel distribution.

The package is distributed as part of the 3 kernel distribution.

Version 2022-11-02
Copyright1990–2022 The 3 Project
MaintainerThe Project Team



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