Racket v8.12
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As of this release:
- The "Die Macht der Abstraktion" language levels are no longer present,
replaced by the "Schreibe dein Programm" language levels which have been
available for several years. (see https://www.deinprogramm.de/sdp/ )
- The release fixes a problem with the binding structure of the `for/fold`
form in the rare situation when an iteration clause identifier shadowed
an accumulator identifier. This change may break code that depends on
the old binding structure. (see https://docs.racket-lang.org/reference/for.html#%28form._%28%28lib._racket%2Fprivate%2Fbase..rkt%29._for%2Ffold%29%29 )
- Racket automatically sets the close-on-exec flag when opening a file, on
systems where this is available. This change lowers the cost of avoiding
problems that can occur when file descriptors become accidentally shared
between processes. (see https://docs.racket-lang.org/reference/file-ports.html#%28def._%28%28lib._racket%2Fprivate%2Fbase..rkt%29._open-input-file%29%29 )
- Match includes `hash` and `hash*` patterns. (see https://docs.racket-lang.org/reference/match.html#%28form._%28%28lib._racket%2Fmatch..rkt%29._match%29%29 )
- The `vector-set/copy` function allows creation of a new vector that differs
at only one index. This change also adds `vector-append` and `vector-copy`
primitives. (see https://docs.racket-lang.org/reference/vectors.html#%28def._%28%28lib._racket%2Fvector..rkt%29._vector-set%2Fcopy%29%29 )
- The `pregexp-quote` function brings the functionality of `regexp-quote`
to pregexps. (see https://docs.racket-lang.org/reference/regexp.html#%28def._%28%28lib._racket%2Fprivate%2Fbase..rkt%29._pregexp-quote%29%29 )
- The C FFI convention-based converter supports `PascalCase` and `camelCase` in
addition to an underscore-based convention. (see https://docs.racket-lang.org/foreign/Defining_Bindings.html#%28form._%28%28lib._ffi%2Funsafe%2Fdefine%2Fconventions..rkt%29._convention~3ahyphen-~3ecamel.Case%29%29 )
- The `racket/case` library allows `case`-like forms that use different
equality comparisons, such as `eq?` and `equal-always?`. (see https://docs.racket-lang.org/reference/case.html#%28form._%28%28lib._racket%2Fcase..rkt%29._case%2Fequal%29%29 )
- Scribble rendering to HTML adds linking and information buttons when
hovering over heading titles.
- The `interval-map` data structure supports iterator functions in the style
of `gen:ordered-dict`. (see https://docs.racket-lang.org/data/Orders_and_Ordered_Dictionaries.html#%28def._%28%28lib._data%2Forder..rkt%29._gen~3aordered-dict%29%29 )
The following people contributed to this release:
Alex Harsányi, Alex Knauth, Alex Muscar, Alexis King, Ben Greenman, Bert
De Ketelaere, Bob Burger, Bogdan Popa, Chris Payne, Fred Fu, J. Ryan
Stinnett, Jamie Taylor, Jared Forsyth, Jarhmander, Jens Axel Søgaard,
Joel Dueck, John Clements, Jordan Johnson, Ken Harris, Laurent Orseau,
Mao Yifu, Marc Nieper-Wißkirchen, Matteo d’Addio, Matthew Flatt,
Matthias Felleisen, Micah Cantor, Mike Sperber, naveen srinivasan, Oscar
Waddell, Philip McGrath, Philippe Meunier, Robby Findler, Rocketnia, Sam
Phillips, Sam Tobin-Hochstadt, Sarthak Shah, Shu-Hung You, Sorawee
Porncharoenwase, Stephen De Gabrielle, Tom Price, ur4t, Wing Hei Chan,
and ZhangHao
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