From: Eli Barzilay <firstname.lastname@example.org> To: email@example.com Subject: [PLT announcement] PLT Scheme v4.1 Date: Tue, 12 Aug 2008 16:12:37 -0400 PLT Scheme version 4.1 is now available from http://plt-scheme.org/ * DrScheme changes: - The Module language now has an automatically inserted `#lang’ declaration, so the interactions window is available right away for new windows. - Searching is now interactive (see the manual for details). - Memory limits are now enabled by default. * Typed Scheme supports a novel type checking mechanism for homogeneous and heterogeneous variable-arity function definitions and applications. * Redex (a domain-specific language for testing operational semantics) is now included in the distribution. See also http://redex.plt-scheme.org/. * Lots of improvement to the documentation, including: better searching, table-of-contents, and language-sensitive help (in the teaching languages). * The world.ss teachpack no longer supports `end-of-time’, only `stop-when’. * MzScheme has now a logging facility, search the documentation for "logger" for more details. * Bug fixes: - `begin’ in R5RS (and derived languages), - `#lang planet’, - `eval’ works with phases. Feedback Welcome, -- ((lambda (x) (x x)) (lambda (x) (x x))) Eli Barzilay: http://www.barzilay.org/ Maze is Life!