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generator argument formals specified directly

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Doc Mo 2021-04-14 12:05:38 -05:00 committed by Matthew Flatt
parent 28a46e36c6
commit b03f274933
1 changed files with 7 additions and 5 deletions
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12
pkgs/racket-doc/scribblings/reference/sequences.scrbl
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@ -1395,11 +1395,13 @@ values from the generator.
@racket[#f] otherwise.
}
@defform[(generator formals body ...+)]{
Creates a @tech{generator}, where @racket[formals] is like the
@racket[formals] of @racket[case-lambda] (i.e., the
@racket[_kw-formals] of @racket[lambda] restricted to non-optional
and non-keyword arguments).
@defform/subs[(generator formals body ...+)
([formals (id ...)
(id ...+ . rest-id)
rest-id])]{
Creates a @tech{generator}, where @racket[formals] specify the arguments.
Keyword and optional arguments are not supported. This is the same as the
@racket[formals] of @racket[case-lambda] without any matching ocurring.
For the first call to a generator, the arguments are bound to the
@racket[formals] and evaluation of @racket[body] starts. During the