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[regexp] simpler way to dispatch on 1st arg

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This commit is contained in:
ben 2015-12-06 23:11:58 -05:00
parent f2c3b38fbb
commit 2b21f30aa7
1 changed files with 5 additions and 3 deletions
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8
regexp.rkt
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@ -19,8 +19,6 @@
(define-syntax regexp-match!
(syntax-parser
[(f pat-stx arg* ...)
#:when (or (string? (syntax-e #'pat-stx))
(regexp? (syntax-e #'pat-stx)))
#:with num-groups (count-groups (format "~a" (syntax-e #'pat-stx)) #:src #'f)
#:with ((index* . group-id*) ...)
#`#,(for/list ([i (in-range (syntax-e #'num-groups))])
@ -37,7 +35,8 @@
(define-for-syntax (count-groups v #:src stx)
(cond
[(string? v) (count-groups/string v #:src stx)]
[(regexp? v) (count-groups/regexp v #:src stx)]
;[(regexp? v) (count-groups/regexp v #:src stx)]
;[(pregexp? v) (count-groups/pregexp v #:src stx)]
[else (error 'regexp-match! "Internal error on input" v)]))
;; Count the number of matched parentheses in a regexp pattern.
@ -66,6 +65,9 @@
(define-for-syntax (count-groups/regexp rxp #:src stx)
(error 'regexp-match! "Not implemented"))
(define-for-syntax (count-groups/regexp pxp #:src stx)
(error 'regexp-match! "Not implemented"))
(define-for-syntax (group-error str reason)
(raise-argument-error
'regexp-match!