I'm pleased to announce version 0.9 of chibi-scheme, "fluorine"
(not responsible for the fluoridation of Larceny's water).

  http://synthcode.com/scheme/chibi/chibi-scheme-0.9.0.tgz

This release includes complete builtin support for the Tangerine Edition of the R7RS large language.  With the ambitious scope of R7RS large, it's unlikely further editions will continue to have builtin support, and will instead rely on external
repositories like snow-fort.

A new compile-time option can enable O(1) string-ref using an offset lookup table.  It is disabled by default because it's still slower than string cursors, and has some small additional overhead in memory, I/O and the FFI.

Other notable changes include:

  * A novel syntax-case implementation built on ER macros
    by Marc Nieper-Wißkirchen.
* Improved Windows support by Yuki Okumura, and BSD support
    thanks to Kris Katterjon, Andrew Gwozdziewycz, and Taylor Campbell.
  * Lightweight library aliases.
  * Native SRFI 160 uniform vectors, with FFI and read/write support.
  * A startup option can enable strict string-cursor checks,
    so that cursors can only be used with the string they reference.
  * JSON read/write support, with utilities to read records.
  * Diff highlighting in unit test failures.
  * Updated to Unicode 13.
  * ... plus many new SRFIs, portability improvements, and bugfixes.

Not counting aliases and test packages, Chibi now comes with over 200 libraries in the base distribution, with many more available on snow-fort.org.

Thanks to everyone else who contributed code, bug reports or feedback!

--
Alex

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