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adjust check syntax to use the new capability in free-identifier=?

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Robby Findler 2011-09-12 20:48:11 -05:00
parent 297cecebcc
commit 621109a40a
1 changed files with 1 additions and 28 deletions
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29
collects/drracket/private/syncheck/traversals.rkt
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@ -161,7 +161,7 @@
#%plain-app #%top #%plain-module-begin
define-values define-syntaxes begin-for-syntax module
#%require #%provide #%expression)
(λ (x y) (free-identifier=?/phases x level y 0))
(λ (x y) (free-identifier=? x y level 0))
[(#%plain-lambda args bodies ...)
(begin
(annotate-raw-keyword sexp varrefs)
@ -382,33 +382,6 @@
(void))])))
(add-tail-ht-links tail-ht)))
;; free-identifier=?/phases : id phase-level id phase-level -> boolean
;; Determines whether x has the same binding at phase-level phase-x
;; that y has at phase-level y.
;; At least one of the identifiers MUST have a binding (module or lexical)
(define (free-identifier=?/phases x phase-x y phase-y)
(cond [(eqv? phase-x phase-y)
(free-identifier=? x y phase-x)]
[else
(let ([bx (identifier-binding x phase-x)]
[by (identifier-binding y phase-y)])
(cond [(and (pair? bx) (pair? by))
(let ([mpix (first bx)]
[namex (second bx)]
[defphasex (fifth bx)]
[mpiy (first by)]
[namey (second by)]
[defphasey (fifth by)])
(and (eq? namex namey)
;; resolved-module-paths are interned
(eq? (module-path-index-resolve mpix)
(module-path-index-resolve mpiy))
(eqv? defphasex defphasey)))]
[else
;; Module is only way to get phase-shift; phases differ, so
;; if not module-bound names, no way can refer to same binding.
#f]))]))
(define (hash-cons! ht k v)
(hash-set! ht k (cons v (hash-ref ht k '()))))