The Racket repository
![]() - Range checking was inconsistent between the sequence and macro forms - The macro form could crash due to unsafe vector refs Fixes involved refactoring the range checks so they are shared between both versions, and changing the contract slightly so start and stop are checked before the sequence runs. This allows unsafe vector refs and earlier error notifications at the cost making some valid programs (e.g. those using some condition to stop a comprehension hitting an invalid index) now be invalid. Only crazy people would rely on the old behaviour, so it isn't a problem in practice. |
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README |
The Racket programming language =============================== Important executables: * DrRacket: Racket's integrated development environment (start here!). * Racket: the main command-line entry point for running racket programs and scripts. * GRacket: the GUI-enabled Racket executable. * raco: Racket's command-line toolset. More Information ---------------- Racket comes with extensive documentation: use DrRacket's `Help' menu, or run `raco docs'. Also, visit us at http://racket-lang.org/ for more Racket resources. Instructions for building Racket from source are in src/README. License ------- Racket Copyright (c) 2010 PLT Scheme Inc. Racket is distributed under the GNU Lesser General Public License (LGPL). This means that you can link Racket into proprietary applications, provided you follow the rules stated in the LGPL. You can also modify Racket; if you distribute a modified version, you must distribute it under the terms of the LGPL, which in particular means that you must release the source code for the modified software. See doc/release-notes/COPYING.LIB for more information.