switch cond order, Color before Bitmap-Pattern #2
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This adds a predicate
color?
for theColor
type, and uses that predicate to distinguishColor
fromBitmap-Pattern
, instead of using thebitmap-pattern?
opaque-type predicate imported byunsafe-require/typed/provide
inunsafe/source.rkt
.This change is related to the Typed Racket pull request racket/typed-racket#882, which fixes an unsoundness in opaque-type predicates. This change allows this code to typecheck after the unsoundness is fixed.