Racket v8.16 draft release notes

Internals
,
5

How about this?

  • Expanded support for immutable and mutable treelists

    • A variety of new treelist utility functions are available:
      treelist-filter, treelist-flatten, et cetera.
    • The mutable-treelist-prepend! function allows prepending to
      mutable treelists.
    • Mutable treelists are serializable.

  • The serialize-structs module allows the minimization of
    dependencies by providing only a handful of core forms

  • The flbit-field function allows access to the binary
    representation of IEEE floating-point numbers.

  • The top-left search box in the documentation works once more.

  • The XML reader uses a different library that is 2x-3x faster on
    inputs with large CDATA blocks, and disables contract checks to
    obtain a 25% speedup on large documents generally.

  • The pregexp syntax includes "\X" to match a grapheme cluster,
    following Perl and PCRE.

  • The read-json* and write-json* functions allow customization of
    the Racket representation of JSON elements, eliminating the need for
    a separate "translation" pass.

  • New port I/O functions

    • The open-input-nowhere function creates an empty input port.
    • The pipe-port? function makes it possible to determine whether a
      port is created by make-pipe.
    • The port-file-stat function allows gathering information about the
      file that is the source or target of a file-stream port.

  • A revised representation of pointers improves the performance of foreign
    function calls.

  • In anticipation of the fifteenth RacketCon, the fifteenth function
    returns the fifteenth element of a list.

  • Racket has an improved multi-line convention for error messages.

  • The db library allows prepare on virtual statements.

  • The student-t distribution is part of the math/distributions
    library.

  • Expeditor supports customizing the prompt, using the prompt
    argument to call-with-expeditor.

  • There is a guide to adding internationalization for a new (human)
    language.

  • #lang htdp/asl incorporates Graphical Debugger support.

  • There is lots of new documentation, and many defects repaired!

The following people contributed to this release:

a11ce, Alex Knauth, Alexander Shopov, Alexis King, Andrew
Mauer-Oats, Anthony Carrico, Bert De Ketelaere, Bob Burger, Bogdan
Popa, D. Ben Knoble, David Van Horn, Gustavo Massaccesi, halfminami,
Hao Zhang, Jacqueline Firth, Jinser Kafka, JJ, John Clements, Jörgen
Brandt, Kraskaska, lafirest, Laurent Orseau, lukejianu, Marc
Nieper-Wißkirchen, Matthew Flatt, Matthias Felleisen, mehbark, Mike
Sperber, Noah Ma, Onorio Catenacci, Oscar Waddell, Pavel Panchekha,
payneca, Robby Findler, Sam Phillips, Sam Tobin-Hochstadt, Shu-Hung
You, Sorawee Porncharoenwase, Stephen De Gabrielle, Wing Hei Chan,
Yi Cao, and ZhangHao.

1 Like