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reformatting

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svn: r8114
This commit is contained in:
Eli Barzilay 2007-12-24 11:29:33 +00:00
parent 4923f00a0d
commit 9ba922ff1c
1 changed files with 47 additions and 52 deletions
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21
collects/scheme/promise.ss
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@ -33,15 +33,12 @@
;; single or multiple values ;; single or multiple values
(fprintf port (fprintf port
(if write? "#<promise!~a~s" "#<promise!~a~a") (if write? "#<promise!~a~s" "#<promise!~a~a")
(if (null? (cdr p)) (if (null? (cdr p)) "" "(values ")
""
"(values ")
(car p)) (car p))
(when (pair? (cdr p)) (when (pair? (cdr p))
(let ([fmt (if write? " ~s" " ~a")]) (let ([fmt (if write? " ~s" " ~a")])
(for-each (lambda (x) (fprintf port fmt x)) (cdr p)))) (for-each (lambda (x) (fprintf port fmt x)) (cdr p))))
(unless (null? (cdr p)) (unless (null? (cdr p)) (display ")" port))
(display ")" port))
(display ">" port)] (display ">" port)]
[(promise? p) (loop (promise-val p))] ; hide sharing [(promise? p) (loop (promise-val p))] ; hide sharing
[else (loop (list p))]))) [else (loop (list p))])))
@ -100,11 +97,10 @@
;; mark root for cycle detection: ;; mark root for cycle detection:
(set-promise-val! promise running) (set-promise-val! promise running)
(with-handlers* ([void (lambda (e) (with-handlers* ([void (lambda (e)
(set-promise-val! promise (lambda () (raise e))) (set-promise-val! promise
(lambda () (raise e)))
(raise e))]) (raise e))])
(let-values ([(single? vals*) (let-values ([(single? vals*) (call-with-values p handle-results)])
(call-with-values p
handle-results)])
(if single? (if single?
(let loop1 ([val* vals*]) (let loop1 ([val* vals*])
(if (promise? val*) (if (promise? val*)
@ -113,12 +109,11 @@
(set-promise-val! promise* promise) ; share with root (set-promise-val! promise* promise) ; share with root
(cond [(procedure? p*) (cond [(procedure? p*)
(let-values ([(single? vals) (let-values ([(single? vals)
(call-with-values p* (call-with-values
handle-results)]) p* handle-results)])
(if single? (if single?
(loop1 vals) (loop1 vals)
(begin (begin (set-promise-val! promise vals)
(set-promise-val! promise vals)
(apply values vals))))] (apply values vals))))]
[(or (pair? p*) (null? p*)) [(or (pair? p*) (null? p*))
(set-promise-val! promise p*) (set-promise-val! promise p*)