[plt-dev] Release Announcement for v4.2.1

I think define-relation is new this time, in Redex...?

Robby

On Mon, Jul 20, 2009 at 5:44 PM, Eli Barzilay<eli at barzilay.org> wrote:
> The release announcement item candidates that I have so far are below.
> Please mail me new items and/or edits.
>
> ----------------------------------------------------------------------
>
> [Matthew]
> * fixed problem with installation of docs in planet packages
>  (adjust planet client to handle nested planet invocations by
>  re-building the doc index only once)
> * delete/backspace issue in DrScheme/MrEd
> * identifier-prune-lexical-context (4.2.0.2)
>  syntax-local-lift-values-expression (4.2.0.3)
>  syntax-local-lift-provide
> * safe-for-space fixes for the interepreter
> * expose and support unreadable symbols
> * Various efficiency improvements to keyword arguments.
> * better interaction of HtDP languages with scheme/match
>
> [Jay]
> * FrTime reorganization
>
> [Matthias]
> * new universe teachpack updates?
>  (universe keeps track of iworlds now; utest contains ball game)
>
> [Robby]
> * redex stuff (brought back syntax locations (for better error
>  messages) in redex main forms and improved define-relation;
>  improved where patterns and a few bug fixes; added
>  metafunction-cases and fixed a layout bug; fixed bug in
>  rendering of reduction relations; added x-spacing and y-spacing
>  parameters to traces and traces/ps)
> * DrScheme's module browser always shows files from the same
>  collection (possibly a planet collection) regardless of the kind
>  of `require' form that is used.
>
> [Ryan]
> * macro-debugger stuff (disable lift errors; fixed opaque variable
>  ref bug)
> * syntax/parse and syntax/id-table libraries
>
> [Sam]
> * typed-scheme stuff ("paths branch")
>
> [Eli]
> * New `make-at-reader/inside' and `make-at-reader' makes it easy
>  to define new scribble readers (in "inside mode" or not) with a
>  command character different from `@'.
> * Note about one of the last builds to include a solaris
>  distribution, and if anyone has access to a solaris machine we
>  can incorporate it into the build.
>
> ----------------------------------------------------------------------
>
> --
>          ((lambda (x) (x x)) (lambda (x) (x x)))          Eli Barzilay:
>                    http://barzilay.org/                   Maze is Life!
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