Software-update: Racket 9.1

Racket is een ontwikkeltaal waarmee andere ontwikkeltalen ontwikkeld kunnen worden. Daarnaast kan gewoon in Racket zelf ontwikkeld worden. Het stond eerder bekend onder de naam PLT Scheme en komt uit de Lisp-Scheme-familie. Voor de achtergrond verwijzen we naar het manifest, geschreven onder leiding van Matthias Felleisen. De ontwikkelaars hebben versie 9.1 van Racket uitgebracht en de changelog van die uitgave ziet er als volgt uit:

Changes in Racket version 9.1:

• Documentation organization and navigation can be specialized by language family, to allow users to interact with documentation in a way that is tailored to that language family. This is currently used by Rhombus.
• The for form and its variants accept an #:on-length-mismatch specifier. info
• DrRacket improves the GUI for choosing color schemes.
• DrRacket has curved syntax arrows. The degree of curvature indicates the relative left- or right-displacement of the arrow’s target.
• DrRacket’s “Insert Large Letters” uses characters that match the comment syntax of the buffer’s language, making it useful (and fun!) in Rhombus.
• The exn-classify-errno maps network and filesystem error numbers on various platforms to posix-standard symbols, to enable more portable code. 10.2 Exceptions
• The behavior of Racket BC on certain character operations (most notably eq?) is changed to match that of Racket CS, with a small performance penalty for these operations for BC programs. 19 Performance 1.5 Implementations
• The make-struct-type procedure can inherit the current inspector using a 'current flag. This is the default behavior, but there are situations in which it’s not possible to refer to the current inspector. 5.2 Creating Structure Types
• Bundle configurations can better control the conventions for locating shared object files with the --enable-sofind=<conv> flags.
• The system-type function can report on platform and shared-object-library conventions with new flags. 15.8 Environment and Runtime Information
• The openssl/legacy library makes it possible to access OpenSSL’s built-in “legacy” provider, to get access to insecure and outdated algorithms. OpenSSL: Secure Communication
• Typed Racket improves expected type propagation for keyword argument functions.
• There are many other repairs and documentation improvements!

Don’t forget to run raco pkg migrate 9.0

Versienummer	9.1
Releasestatus	Final
Besturingssystemen	Linux, BSD, Solaris, Windows 10, Windows Server 2016, Windows Server 2019, Windows 11, Windows Server 2022, Windows Server 2025
Website	Racket
Download	https://download.racket-lang.org/
Licentietype	Voorwaarden (GNU/BSD/etc.)