Racket v8.16
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- Racket has 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 is 2-3x faster on inputs with long CDATA and
comments, and avoids some internal 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.
- Racket has 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. As a result, `ptr-ref` and `ptr-set!` are
substantially faster.
- 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`
keyword argument to `call-with-expeditor`.
- There is a guide to adding internationalization for a new (human)
language.
- Optimizations to racket/profile improve asymptotic speed for very
large call graphs.
- The `#lang htdp/asl` language 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.
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