865a2cdcbd
Caveats: - keyword function definitions do not define static bindings, thus limiting optimization opportunities - can't use `define:`, `lambda:`, etc with keywords - error messages sometimes expose the implementation - the optimizer skips most of the generated code for keyword functions definitions (user-level code is optimized)
33 lines
1.2 KiB
Racket
33 lines
1.2 KiB
Racket
#lang scribble/doc
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@(require "common.rkt" (for-label syntax/define))
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@title[#:tag "define"]{Parsing @racket[define]-like Forms}
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@defmodule[syntax/define]
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@defproc[(normalize-definition [defn-stx syntax?]
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[lambda-id-stx identifier?]
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[check-context? boolean? #t]
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[opt+kws? boolean? #f])
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(values identifier? syntax?)]{
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Takes a definition form whose shape is like @racket[define] (though
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possibly with a different name) and returns two values: the defined
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identifier and the right-hand side expression.
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To generate the right-hand side, this function may need to insert uses
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of @racket[lambda]. The @racket[lambda-id-stx] argument provides a
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suitable @racket[lambda] identifier.
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If the definition is ill-formed, a syntax error is raised. If
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@racket[check-context?] is true, then a syntax error is raised if
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@racket[(syntax-local-context)] indicates that the current context is
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an expression context. The default value of @racket[check-context?] is
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@racket[#t].
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If @racket[opt-kws?] is @racket[#t], then arguments of the form
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@racket[[id expr]], @racket[keyword id], and @racket[keyword [id
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expr]] are allowed, and they are preserved in the expansion.}
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