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Changes in Racket 5.3 * Submodules are nested module declarations that can be loaded and run independently from the enclosing module. For an overview of submodules, see http://blog.racket-lang.org/2012/06/submodules.html * The futures visualizer is a graphical profiling tool for parallel programs using futures. The tool shows a detailed execution timeline depicting the migration of futures between threads, and gives detailed information about each runtime synchronization that occurred during program execution. In addition, `would-be-future' is a special type of future that always executes sequentially and records all potential barricades a regular future would encounter. * Optimization Coach (formerly Performance Report) reports information about Racket's inlining optimizations. Optimization Coach can be launched in any language through the View menu. * The new `images/flomap' library defines floating-point bitmaps and fast image processing operations on them. It is written in Typed Racket, so Typed Racket code may use it without the cost of contract checks. * The new `json' library supports parsing and generating JSON. (Originally based on Dave Herman's planet library.) * `racket/string' is extended with a set of simplified string manipulation functions that are more convenient than using regexps. `regexp-match*' and friends can now be used with new keyword arguments to return specific matched regexp group/s and gaps between matches. * The new `racket/generic' library allows generic function definitions, which dispatch to methods added to a structure type via the new `#:methods' keyword. * The `class' form supports declaring a method abstract. An abstract method prevents a class from being instantiated unless it is overridden. * The contract library comes with support for interfaces, generics, prompts, continuation-marks, and structs. * Most error messages use a new multi-line format that is more consistent with contract errors and accommodates more information. * Typed Racket supports function definitions with keyword arguments; the startup time of Typed Racket programs has been sharply reduced. * The new `ffi/com' library replaces MysterX; a compatibility `mysterx' library remains, but without ActiveX support. The new `ffi/unsafe/com' library offers a more primitive and direct way to use COM classes and methods. * There is now a very complete completion code for zsh. It is not included in the distribution though; get it at http://goo.gl/DU8JK (This script and the bash completions will be included in the standard installers in future versions.) --- DEPRECATION ---------------------------------------------------- Effective this release: - The `tex2page' and `combinator-parser' libraries have been moved from the Racket distribution to PLaneT: (require (planet plt/tex2page)) (require (planet plt/combinator-parser)) The following has been deprecated and will be removed in the January 2013 release: - the `planet' command-line tool; use `raco planet' instead. The following has been deprecated and will be removed in the August 2013 release: - the `mzlib/class100' library; use `racket/class' instead. |
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