Racket v9.2
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- The `match` form checks that when non-linear patterns (patterns
where the same variable is used multiple times) are used with `...`,
the two parts of the matched value actually are equal. Additionally,
match rejects non-linear patterns where one use of the variable is
used with `...` and another is not. This repair could cause existing
code to fail.
- Typed Racket's types for the `asin` and `acos` procedures correctly
handle situations where the function produces a complex number,
avoiding unsound results that were previously possible. This repair
could cause existing code to fail at compile time.
- The `#%foreign-inline` core syntactic form provides unsafe access to
facilities provided at the linklet layer by a Racket implementation.
This means that any code that handles all core forms by enumeration
will need to be updated.
- Unicode 17.0 is used for character and string operations.
- This release includes internal support for a more static "ffi2"
foreign interface (to be used in a future package).
- The `terminal-file-position` function counts bytes written to ports
connected to a terminal, such as `stdin` and `stderr`.
- Cross-phase persistent modules allow more types of `quote`d data.
- The implementations of `member`, `memw`, `when`, `unless`, `let/ec`,
and `cond` are rewritten to use only `racket/kernel` syntax
- The `impersonator-property-predicate-procedure?` function identifies
procedures created by `make-impersonator-property`.
- In Typed Racket, polymorphic struct types are printed using type
arguments (e.g., `(Array Byte)`) rather than exposing an internal
representation.
- The stepper's display of numbers better matches the language
settings.
- Scribble documents that do not use the Racket-manual style get an
`initial-scale` of 1.0, instead of the manual style's 0.8, but this
can be configured using the `initial-scale` property.
- By default, margin notes appear inline for narrow displays in all
styles, not just in the Racket-manual style.
- Big-bang programs distributed as .dmg files correctly handle the
`close-on-stop` feature.
- There are many other repairs and documentation improvements!
The following people contributed to this release:
Alexander Shopov, Alexis King, Asilo, Bert De Ketelaere, Bob Burger,
Bogdan Popa, Chung-chieh Shan, François-René Rideau, Gustavo
Massaccesi, Ilya Klyuchnikov, Jade Sailor, Jamie Taylor, John
Clements, Jonathan Simpson, LS_Hower, Matthew Flatt, Matthias
Felleisen, Mike Sperber, Pavel Panchekha, Philippe Meunier, RMOlive,
Robby Findler, Roman Klochkov, Sam Tobin-Hochstadt, Shu-Hung You,
Stephen de Gabrielle, Tejas Sanap, Vincent Lee, and Wing Hei Chan.
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