The Racket repository
cc642c3382
be equal?-based contracts instead of = based contracts. Before this change, the contract (or/c 1 2 +nan.0) was the same contract as (or/c 1 2), because +nan.0 was the same contract as the predicate (lambda (x) (= x +nan.0)), which is the same as (lambda (x) #f). Now, +nan.0 and +nan.f are the only numbers that are treated as equal?-based contracts, but this means that (or/c 1 2 +nan.0) actually accepts +nan.0. |
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This is the source code for the main Racket distribution. See "INSTALL.txt" for information on building Racket. License ------- Racket Copyright (c) 2010-2014 PLT Design Inc. Racket is distributed under the GNU Lesser General Public License (LGPL). This implies that you may 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 states that you must release the source code for the modified software. See racket/src/COPYING_LESSER.txt for more information.