64 lines
2.3 KiB
Racket
64 lines
2.3 KiB
Racket
#lang scribble/doc
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@(require "common.ss"
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(for-label syntax/kerncase))
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@(define-syntax-rule (intro id)
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(begin
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(require (for-label mzscheme))
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(define id (scheme if))))
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@(intro mzscheme-if)
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@; ----------------------------------------------------------------------
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@title[#:tag "kerncase"]{Matching Fully-Expanded Expressions}
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@defmodule[syntax/kerncase]
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@defform[(kernel-syntax-case stx-expr trans?-expr clause ...)]{
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A syntactic form like @scheme[syntax-case*], except that the literals
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are built-in as the names of the primitive PLT Scheme forms as
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exported by @schememodname[scheme/base]; see @secref[#:doc refman
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"fully-expanded"].
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The @scheme[trans?-expr] boolean expression replaces the comparison
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procedure, and instead selects simply between normal-phase comparisons
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or transformer-phase comparisons. The @scheme[clause]s are the same as in
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@scheme[syntax-case*].
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The primitive syntactic forms must have their normal bindings in the
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context of the @scheme[kernel-syntax-case] expression. Beware that
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@scheme[kernel-syntax-case] does not work in a module whose language
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is @scheme[mzscheme], since the binding of @mzscheme-if from
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@scheme[mzscheme] is different than the primitive @scheme[if].}
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@defform[(kernel-syntax-case* stx-expr trans?-expr (extra-id ...) clause ...)]{
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A syntactic form like @scheme[kernel-syntax-case], except that it
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takes an additional list of extra literals that are in addition to the
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primitive PLT Scheme forms.}
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@defform[(kernel-syntax-case/phase stx-expr phase-expr clause ...)]{
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Generalizes @scheme[kernel-syntax-case] to work at an arbitrary phase
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level, as indicated by @scheme[phase-expr].}
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@defform[(kernel-syntax-case*/phase stx-expr phase-expr (extra-id ..)
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clause ...)]{
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Generalizes @scheme[kernel-syntax-case*] to work at an arbitrary phase
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level, as indicated by @scheme[phase-expr].}
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@defproc[(kernel-form-identifier-list) (listof indentifier?)]{
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Returns a list of identifiers that are bound normally,
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@scheme[for-syntax], and @scheme[for-template] to the primitive PLT
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Scheme forms for expressions and internal-definition positions (so the
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list does not include @scheme[#%require] or @scheme[#%provide]). This
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function is useful for generating a list of stopping points to provide
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to @scheme[local-expand].}
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