Re: [racket-dev] Closes PR 11062
Right. It should be fixed now, tho. Thanks, Robby On Fri, Jul 30, 2010 at 10:06 PM, Matthias Felleisen matth...@ccs.neu.edu wrote: Robby, this fix does NOT change the problematic coverage of structures. Fields are still colored as if they had never been evaluated. On Jul 30, 2010, at 1:16 PM, mfl...@racket-lang.org wrote: mflatt has updated `master' from 14de7399bd to 0e8af6bc5d. http://git.racket-lang.org/plt/14de7399bd..0e8af6bc5d =[ 1 Commits ]== Directory summary: 93.3% collects/lang/private/ 6.6% collects/tests/racket/ ~~ 0e8af6b Matthew Flatt mfl...@racket-lang.org 2010-07-30 11:04 : | fix acc/mut error msgs from `define-struct' in teaching languages | Merge to 5.0.1 | Closes PR 11062 : M collects/lang/private/teach.rkt | 42 --- M collects/tests/racket/advanced.rktl | 4 +++ M collects/tests/racket/beg-adv.rktl | 1 + =[ Overall Diff ]=== collects/lang/private/teach.rkt ~~~ --- OLD/collects/lang/private/teach.rkt +++ NEW/collects/lang/private/teach.rkt @@ -116,13 +116,13 @@ (define-for-syntax (stepper-ignore-checker stx) (stepper-syntax-property stx 'stepper-skipto '(syntax-e cdr syntax-e cdr car))) - (define-for-syntax (map-with-index proc list) - (let loop ([i 0] [list list] [rev-result '()]) - (if (null? list) + (define-for-syntax (map-with-index proc . lists) + (let loop ([i 0] [lists lists] [rev-result '()]) + (if (null? (car lists)) (reverse rev-result) (loop (+ 1 i) - (cdr list) - (cons (proc i (car list)) rev-result) + (map cdr lists) + (cons (apply proc i (map car lists)) rev-result) ;; build-struct-names is hard to handle (define-for-syntax (make-struct-names name fields stx) @@ -855,16 +855,28 @@ ;; give `check-struct-wraps!' access (make-inspector))) - #,@(map-with-index (lambda (i name) - #`(define (#,name r) - (raw-generic-access r #,i) ; error checking - (check-struct-wraps! r) - (raw-generic-access r #,i))) - getter-names) - #,@(map-with-index (lambda (i name) - #`(define (#,name r v) - (raw-generic-mutate r #,i v))) - setter-names) + #,@(map-with-index (lambda (i name field-name) + #`(define #,name + (let ([raw (make-struct-field-accessor + raw-generic-access + #,i + '#,field-name)]) + (lambda (r) + (raw r) ; error checking + (check-struct-wraps! r) + (raw r) + getter-names + fields) + #,@(map-with-index (lambda (i name field-name) + #`(define #,name + (let ([raw (make-struct-field-mutator + raw-generic-mutate + #,i + '#,field-name)]) + (lambda (r v) + (raw r v) + setter-names +
Re: [racket-dev] P4P: A Syntax Proposal
2010/7/31 Eli Barzilay e...@barzilay.org: There's a whole bunch of these things (in CL and Scheme), and IIRC, Jens had something very well doone recently -- but they all suffer from requiring some ugly wrapper syntax around them. Indeed. In order to keep the wrapping at a minimum I contemplate hijacking strings starting with $, that is, if a string starts with $ then the remaining part of the string is parsed as an infix expression. I came to my senses eventually. http://planet.racket-lang.org/package-source/soegaard/infix.plt/1/0/planet-docs/manual/index.html -- Jens Axel Søgaard _ For list-related administrative tasks: http://lists.racket-lang.org/listinfo/dev
Re: [racket-dev] Getting old versions of PLT Scheme
On Jul 22, Carl Eastlund wrote: To fix a backwards compatibility bug, I just had to go download PLT Scheme 4.2.4. It's a real pain to do so. First, the Racket site doesn't seem to link to versions before 5.0. I had to go to plt-scheme.org manually. It'd be nice if I could get to the whole history in one place. Second, at plt-scheme.org, the window is covered by a misshapen dialog telling me to go to the Racket site. I have put a picture of the misshapen window up at http://www.ccs.neu.edu/home/cce/racket-dialog.png (this from Firefox 3.6.2 on Intel Mac). Third, it takes several clicks to get to the 4.2.4 download, and at each click the dialog pops back up again. Our site(s) would be easier to get around if any or all of these were fixed: old versions from the Racket Download page, an easier to read redirection dialog, and only seeing that dialog once per visit. Patches welcome. See revision 2715 of iplt on the svn repository for where to change things. (The bad text size is something that I couldn't find out how to fix yet, and the one-warning-per-visit requires adding code that will use a cookie.) -- ((lambda (x) (x x)) (lambda (x) (x x))) Eli Barzilay: http://barzilay.org/ Maze is Life! _ For list-related administrative tasks: http://lists.racket-lang.org/listinfo/dev
Re: [racket-dev] using the Y combinator to...
The use of the Y combinator (as opposed to the built-in forms of recursion) seems to be hacking around the ability for Ruby methods to be redefined more than anything? Robby On Sat, Jul 31, 2010 at 8:54 PM, Shriram Krishnamurthi s...@cs.brown.edu wrote: ...provide a mis-feature that the language thoughtfully left out: http://www.eecs.harvard.edu/~cduan/technical/ruby/ycombinator.shtml (The bit about lexical scoping in Ruby is also neat. It says that deep down, Ruby really is the same as JavaScript and Python.) Shriram _ For list-related administrative tasks: http://lists.racket-lang.org/listinfo/dev _ For list-related administrative tasks: http://lists.racket-lang.org/listinfo/dev
