[racket-dev] [plt] Push #26936: master branch updated

Maybe. I'll see if I can think of a better solution.

Vincent


At Thu, 6 Jun 2013 17:35:50 -0500,
Robby Findler wrote:
> 
> Can't we do better than a memo table?
> 
> On Thursday, June 6, 2013, wrote:
> 
> > stamourv has updated `master' from 5ea3a1ce6d to 6e8c9ed15a.
> >   http://git.racket-lang.org/plt/5ea3a1ce6d..6e8c9ed15a
> >
> > =====[ 2 Commits ]======================================================
> > Directory summary:
> >   82.9% collects/racket/contract/private/
> >   17.0% collects/scribblings/reference/
> >
> > ~~~~~~~~~~
> >
> > d1df869 Vincent St-Amour <stamourv at racket-lang.org <javascript:;>>
> > 2013-06-06 18:02
> > :
> > | Document procedure-closure-contents-eq?.
> > :
> >   M collects/scribblings/reference/procedures.scrbl | 5 +++++
> >
> > ~~~~~~~~~~
> >
> > 6e8c9ed Vincent St-Amour <stamourv at racket-lang.org <javascript:;>>
> > 2013-06-06 18:31
> > :
> > | Memoize wrapped case-> range contracts.
> > |
> > | Fixes failing contract tests.
> > :
> >   M collects/racket/contract/private/arrow.rkt | 21 +++++++++++++++------
> >
> > =====[ Overall Diff ]===================================================
> >
> > collects/racket/contract/private/arrow.rkt
> > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> > --- OLD/collects/racket/contract/private/arrow.rkt
> > +++ NEW/collects/racket/contract/private/arrow.rkt
> > @@ -1712,12 +1712,21 @@ v4 todo:
> >                                            "the domain of"
> >                                            #:swap? #t)))
> >                                   dom-ctcs+case-nums)
> > -                            (map (λ (f)
> > -                                   (define p (f rng-blame))
> > -                                   (lambda args
> > -                                     (with-continuation-mark
> > -                                      contract-continuation-mark-key blame
> > -                                      (apply p args))))
> > +                            (map (let ([memo '()])
> > +                                   ;; to preserve
> > procedure-closure-contents-eq?ness of the
> > +                                   ;; wrapped procedures, memoize with f
> > as the key.
> > +                                   (λ (f)
> > +                                     (define target
> > +                                       (assoc f memo
> > procedure-closure-contents-eq?))
> > +                                     (if target
> > +                                         (cdr target)
> > +                                         (let* ([p   (f rng-blame)]
> > +                                                [new (lambda args
> > +
> > (with-continuation-mark
> > +
> >  contract-continuation-mark-key blame
> > +                                                        (apply p args)))])
> > +                                           (set! memo (cons (cons f new)
> > memo))
> > +                                           new))))
> >                                   rng-ctcs)))
> >        (define (chk val mtd?)
> >          (cond
> >
> > collects/scribblings/reference/procedures.scrbl
> > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> > --- OLD/collects/scribblings/reference/procedures.scrbl
> > +++ NEW/collects/scribblings/reference/procedures.scrbl
> > @@ -88,6 +88,11 @@ to the wrong number of arguments, the resulting error
> > hides the first
> >  argument as if the procedure had been compiled with the
> >  @indexed-racket['method-arity-error] syntax property.}
> >
> > + at defproc[(procedure-closure-contents-eq? [proc1 procedure?]
> > +                                         [proc2 procedure?]) boolean?]{
> > +Compares the contents of the closures of @racket[proc1] and @racket[proc2]
> > +for equality by comparing closure elements pointwise using @racket[eq?]}
> > +
> >  @; ----------------------------------------
> >  @section{Keywords and Arity}
> >
> >