On Fri, Apr 29, 2011 at 4:16 PM, Matthew Flatt <mfl...@cs.utah.edu> wrote: > I couldn't resist an editing pass to give the bullets a more consistent > style. > > Matthias: I re-wrote your universe bullet in an attempt to clarify that > the universe API didn't change --- only the network protocol, if I > understand correctly. Please check.
It should probably '5.1.1 is not compatible with earlier versions' or something like that. Robby > ---------------------------------------- > > Racket version 5.1.1 is now available from > > http://racket-lang.org/ > > * The new `racket/stream' library provides `stream-first', > `stream-rest', a lazy `stream-cons', and so on. Streams are a > subtype of sequences, so they work in `for' forms. Some sequence > generators, such as `in-range', now produce streams. A > `racket/sequence' library replaces the old `racket/stream' > library. > > * The new `racket/syntax' library contains facilities useful for > writing macros. The new `syntax/srcloc' and `syntax/location' > libraries provide support for manipulating source locations. > > * The `racket/gui' library now supports multi-column list boxes and > scrolling panels. > > * The new `ffi/file' library is useful for writing foreign library > bindings that cooperate with Racket's security guard mechanism. > > * Generators from the `racket/generator' library can now have formal > arguments that are used when the generator is fired up. > > * Single-precision floating-point support is now enabled by default. > Single-precision floats print differently from their default > double-precision counterparts, new primitives convert between the two > precisions, and new reader syntax supports single-precision literals. > > * JIT improvements include a small change to aid x86 branch prediction > on function-call returns, which can speed up some programs > significantly. > > * Typed Racket: > - The numeric tower has been entirely overhauled. TR programs can > now use more precise types than before, and check more numeric > properties, such as sign or range properties. > - Fixnum optimizations have been improved and should apply more > broadly. > - The performance of the typechecker has been improved. In > particular, dispatch on large union types should typecheck much > faster than before. > > * The Stepper can now step through Lazy Racket programs. > > * The `racket/future' library includes `fsemaphore' values, the > `future' primitive no longer freezes futures (so a future can spawn > new futures), and `future' log messages are more informative. > > * PLaneT development links are now version-specific. > > * The `2htdp/image' library now includes `overlay/align', > `underlay/align', `overlay/align/offset' and 'underlay/align/offset'. > > * The network protocol for universes in `2htdp/universe' has changed, > so that v5.1 and its predecessors are incompatible. > > * The "DrScheme" application (which simply ran DrRacket in the last > few releases) has been removed. The "MrEd" GUI executables for > Windows and Mac OS X have also been removed, although the "mred" > console executable remains for Unix and Mac OS X to support old > scripts. > > _________________________________________________ > For list-related administrative tasks: > http://lists.racket-lang.org/listinfo/dev > _________________________________________________ For list-related administrative tasks: http://lists.racket-lang.org/listinfo/dev
