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Document utility predicates.

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original commit: 045fd7a77c814016739020a7eedaac1ad03d4795
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Sam Tobin-Hochstadt 2011-05-01 10:56:16 -04:00
parent 00820b2a91
commit b55c9dfa2b
1 changed files with 9 additions and 3 deletions
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12
collects/typed-scheme/scribblings/ts-reference.scrbl
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@ -111,9 +111,9 @@ Single-Flonum-Zero
)]{These types represent the hierarchy of @rtech{numbers} of Racket.
@racket[Integer] includes only @rtech{integers} that are @rtech{exact
numbers}, corresponding to the predicate @racket[exact-integer?].
@racket{Real} includes both exact and inexact reals.
An @racket{Inexact-Real} can be either 32- or 64-bit floating-point
numbers. @racket{Float} is restricted to 64-bit floats, which are the
@racket[Real] includes both exact and inexact reals.
An @racket[Inexact-Real] can be either 32- or 64-bit floating-point
numbers. @racket[Float] is restricted to 64-bit floats, which are the
default in Racket.
@ex[
@ -786,6 +786,12 @@ program errors. These assertions behave like @racket[assert].
}
@defproc[(defined? [v any/c]) boolean?]{A predicate for determining if
@racket[v] is @emph{not} @|undefined-const|.}
@defproc[(index? [v any/c]) boolean?]{A predicate for the @racket[Index]
type.}
@section{Typed Racket Syntax Without Type Checking}
@defmodulelang*[(typed/racket/no-check