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made mutual recursion work for ->d

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svn: r12366
This commit is contained in:
Robby Findler 2008-11-09 13:42:46 +00:00
parent cfdcfd9a0a
commit 773aaca3ba
2 changed files with 83 additions and 50 deletions
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38
collects/scheme/private/contract-arrow.ss
View File

@ -833,12 +833,14 @@ v4 todo:
(syntax-local-infer-name stx)
#`(λ args (apply f args))))))))))))]))
(define ->d-tail-key (gensym '->d-tail-key))
(define (->d-proj ->d-stct)
(let ([non-kwd-ctc-count (+ (length (->d-mandatory-dom-ctcs ->d-stct))
(length (->d-optional-dom-ctcs ->d-stct))
(if (->d-mtd? ->d-stct) 1 0))])
(λ (pos-blame neg-blame src-info orig-str)
(let ([tail-key (gensym '->d-tail-key)])
(let ([this->d-id (gensym '->d-tail-key)])
(λ (val)
(check-procedure val
(->d-mtd? ->d-stct)
@ -856,16 +858,8 @@ v4 todo:
[dep-pre-args
(build-dep-ctc-args non-kwd-ctc-count raw-orig-args (->d-rest-ctc ->d-stct)
(->d-keywords ->d-stct) kwd-args kwd-arg-vals)]
[thnk
[thunk
(λ ()
(when (->d-pre-cond ->d-stct)
(unless (apply (->d-pre-cond ->d-stct) dep-pre-args)
(raise-contract-error val
src-info
neg-blame
orig-str
"#:pre-cond violation")))
(with-continuation-mark tail-key #t
(keyword-apply
val
kwd-args
@ -908,7 +902,20 @@ v4 todo:
(error 'shouldnt\ happen))]
[else (cons (invoke-dep-ctc (car non-kwd-ctcs) dep-pre-args (car args) neg-blame pos-blame src-info orig-str)
(loop (cdr args)
(cdr non-kwd-ctcs)))]))))))]
(cdr non-kwd-ctcs)))])))))]
[check-and-mark
(λ (marks)
(when (->d-pre-cond ->d-stct)
(unless (apply (->d-pre-cond ->d-stct) dep-pre-args)
(raise-contract-error val
src-info
neg-blame
orig-str
"#:pre-cond violation")))
(if marks
(with-continuation-mark ->d-tail-key (cons this->d-id marks)
(thunk))
(thunk)))]
[rng (let ([rng (->d-range ->d-stct)])
(cond
[(not rng) #f]
@ -918,12 +925,13 @@ v4 todo:
[else rng]))]
[rng-underscore? (box? (->d-range ->d-stct))])
(call-with-immediate-continuation-mark
tail-key
->d-tail-key
(λ (first-mark)
(if (and rng
(not first-mark))
(not (and first-mark
(member this->d-id first-mark))))
(call-with-values
thnk
(λ () (check-and-mark (or first-mark '())))
(λ orig-results
(let* ([range-count (length rng)]
[post-args (append orig-results raw-orig-args)]
@ -959,7 +967,7 @@ v4 todo:
(if rng-underscore? #f dep-post-args)
(car results) pos-blame neg-blame src-info orig-str)
(loop (cdr results) (cdr result-contracts)))]))))))
(thnk))))))])
(check-and-mark #f))))))])
(make-keyword-procedure kwd-proc
((->d-name-wrapper ->d-stct)
(λ args

25
collects/tests/mzscheme/contract-test.ss
View File

@ -5265,6 +5265,31 @@ so that propagation occurs.
(f 3))
(c)))
(ctest '(1 1)
'tail->d-mut-rec
(letrec ([odd-count 0]
[pos-count 0]
[count-odd?
(λ (x)
(set! odd-count (+ odd-count 1))
(odd? x))]
[count-positive?
(λ (x)
(set! pos-count (+ pos-count 1))
(positive? x))]
[returns-odd
(contract (->d ([x any/c]) () [_ count-odd?])
(λ (x) (returns-pos x))
'pos
'neg)]
[returns-pos
(contract (->d ([x any/c]) () [_ count-positive?])
(λ (x) (if (zero? x) 1 (returns-odd (- x 1))))
'pos
'neg)])
(returns-odd 3)
(list odd-count pos-count)))
(ctest 2
'case->-regular
(let ([c (counter)])