Re: [racket-dev] typed/racket for loops?
Its a bad error message I believe. (: p (Listof Fixnum)) (define p (for/list: : (Listof Fixnum) ([i : Fixnum (in-range 30)]) i)) - Original Message - From: "John Clements" To: "Sam Tobin-Hochstadt" Cc: "dev" Sent: Tuesday, June 7, 2011 3:10:58 PM (GMT-0500) Auto-Detected Subject: [racket-dev] typed/racket for loops? I can't get typed racket to work with for loops, e.g.: #lang typed/racket (: p (Listof Natural)) (define p (for/list: : Natural ([i (in-range 30)]) i)) ==> Type Checker: Error in macro expansion -- untyped variable: for-loop in: (for/list: : Natural ((i (in-range 30))) i) Am I doing something silly here? I tried annotating the type of the loop variable 'i', with no change in the error message. John _ For list-related administrative tasks: http://lists.racket-lang.org/listinfo/dev _ For list-related administrative tasks: http://lists.racket-lang.org/listinfo/dev
Re: [racket-dev] Can someone tell whats wrong with this?
No its unlimited... - Original Message - From: "Matthew Flatt" To: "Hari Prashanth" Cc: "PLT Developers" Sent: Friday, February 25, 2011 8:33:20 PM GMT -05:00 US/Canada Eastern Subject: Re: [racket-dev] Can someone tell whats wrong with this? Do you have a `vmemoryuse' limit set? At Fri, 25 Feb 2011 19:29:17 -0500 (EST), Hari Prashanth wrote: > The program is killed when the call to `collect' inside for loop is > commented... I am using a fairly recent version of Racket... > > #lang racket/load > > (module RACKETSET racket/base > > (require (prefix-in rk: racket/set)) > > (define list1 (build-list 100 add1)) > (define list2 (build-list 100 (λ (x) (+ x 100 > > (define set1 (apply rk:set list1)) > (define set2 (apply rk:set list2)) > > (display "Racket sets\n") > (define (collect) > (collect-garbage) > (collect-garbage) > (collect-garbage)) > > (collect) > (define sets > (for ([i (in-range 10)]) > (time (rk:set-union set1 set2)) > #;(collect > > swamiji@ubuntu:~/Desktop/krhari/TS$ raco make set-benchmark.rkt > swamiji@ubuntu:~/Desktop/krhari/TS$ racket set-benchmark.rkt > Racket sets > cpu time: 5800 real time: 5810 gc time: 520 > cpu time: 6670 real time: 7041 gc time: 1390 > cpu time: 5890 real time: 10478 gc time: 620 > Killed > swamiji@ubuntu:~/Desktop/krhari/TS$ > > _ > For list-related administrative tasks: > http://lists.racket-lang.org/listinfo/dev _ For list-related administrative tasks: http://lists.racket-lang.org/listinfo/dev
[racket-dev] Can someone tell whats wrong with this?
The program is killed when the call to `collect' inside for loop is commented... I am using a fairly recent version of Racket... #lang racket/load (module RACKETSET racket/base (require (prefix-in rk: racket/set)) (define list1 (build-list 100 add1)) (define list2 (build-list 100 (λ (x) (+ x 100 (define set1 (apply rk:set list1)) (define set2 (apply rk:set list2)) (display "Racket sets\n") (define (collect) (collect-garbage) (collect-garbage) (collect-garbage)) (collect) (define sets (for ([i (in-range 10)]) (time (rk:set-union set1 set2)) #;(collect swamiji@ubuntu:~/Desktop/krhari/TS$ raco make set-benchmark.rkt swamiji@ubuntu:~/Desktop/krhari/TS$ racket set-benchmark.rkt Racket sets cpu time: 5800 real time: 5810 gc time: 520 cpu time: 6670 real time: 7041 gc time: 1390 cpu time: 5890 real time: 10478 gc time: 620 Killed swamiji@ubuntu:~/Desktop/krhari/TS$ _ For list-related administrative tasks: http://lists.racket-lang.org/listinfo/dev
Re: [racket-dev] F1 on latest release
I have seen this before... If I remember correctly, it happened after using "raco fileinject" and "raco remove" several times... I just removed .racket directory and it went away... I could not reproduce the problem, so I did not report it... Hari - Original Message - From: "Matthias Felleisen" To: "plt-dev Developers" Sent: Wednesday, October 20, 2010 11:22:35 PM GMT -05:00 US/Canada Eastern Subject: [racket-dev] F1 on latest release F1 doesn't work on a recent git: browser-run: process execute failed: '(# "-e" "open location \"file:///Users/matthias/Library/Racket/5.0.1.8/doc/search/search-context.html?q=read-html&hq=O%3A%7B%20L%3Alang%2Fhtdp-beginner-abbr%20T%3Ateachpack%20%7D&label=Beginning%20Student%20with%20List%20Abbrev... Anyone else with this problem? _ For list-related administrative tasks: http://lists.racket-lang.org/listinfo/dev _ For list-related administrative tasks: http://lists.racket-lang.org/listinfo/dev
Re: [racket-dev] Bug? identifier `make-Int' not included in nested require spec.
Ok it does work... Thanks Hari - Original Message - From: "Sam Tobin-Hochstadt" To: "Hari Prashanth" Cc: "dev" Sent: Monday, October 4, 2010 7:16:26 PM GMT -05:00 US/Canada Eastern Subject: Re: [racket-dev] Bug? identifier `make-Int' not included in nested require spec. This is a known bug with the interaction of `struct' and `require/typed'. `define-struct' should work here. On Mon, Oct 4, 2010 at 7:11 PM, Hari Prashanth wrote: > Am I doing some thing wrong or is it a bug? > > #lang racket/load > > (module UNTYPED racket/base > (struct Int (elem)) > > (provide (struct-out Int))) > > (module TYPED typed/racket > (require/typed 'UNTYPED > [struct Int ([elem : Integer])])) > > I get the following error > > only-in: identifier `make-Int' not included in nested require spec in: (quote > UNTYPED) > > Hari > _ > For list-related administrative tasks: > http://lists.racket-lang.org/listinfo/dev > -- sam th sa...@ccs.neu.edu _ For list-related administrative tasks: http://lists.racket-lang.org/listinfo/dev
[racket-dev] Bug? identifier `make-Int' not included in nested require spec.
Am I doing some thing wrong or is it a bug? #lang racket/load (module UNTYPED racket/base (struct Int (elem)) (provide (struct-out Int))) (module TYPED typed/racket (require/typed 'UNTYPED [struct Int ([elem : Integer])])) I get the following error only-in: identifier `make-Int' not included in nested require spec in: (quote UNTYPED) Hari _ For list-related administrative tasks: http://lists.racket-lang.org/listinfo/dev
Re: [racket-dev] typed/scheme n00b question
Since secs and and fail-thunk are optional, we need to use case lambda for writhing the type. (require/typed racket/base [file-or-directory-modify-seconds (case-lambda [String -> (U Integer Void exn:fail:filesystem)] [String (-> exn:fail:filesystem) -> (U Integer Void exn:fail:filesystem)] [String (Option Integer) (-> exn:fail:filesystem) -> (U Integer Void exn:fail:filesystem)])]) * If we do not have exn:fail:filesystem, it will raise a contract-broken error when fail-thunk raises an exception. So I added exn:fail:filesystem. So how can I have the exception and not the contract error? Hari - Original Message - From: "Shriram Krishnamurthi" To: "Sam Tobin-Hochstadt" Cc: "Hari Prashanth" , "plt-dev Developers" Sent: Sunday, September 5, 2010 9:59:32 AM GMT -05:00 US/Canada Eastern Subject: Re: [racket-dev] typed/scheme n00b question Can you tell us (om the list) what the true type is? I'm sure I'm not the only one curious as to precisely what it is and how you would write it w/ the exception. Thanks. Shriram On Sun, Sep 5, 2010 at 8:57 AM, Sam Tobin-Hochstadt wrote: > On Sun, Sep 5, 2010 at 3:06 AM, Hari Prashanth wrote: >> Is this what you are looking for? >> >> (require/typed racket/base >> [file-or-directory-modify-seconds >> (String (Option Integer) (-> exn:fail:filesystem) -> (U >> Integer Void))]) > > Hari is correct that you can use `require/typed' on `racket/base'. > However, that type isn't quite right - it shouldn't *return* > `exn:fail:filesystem' - that is an exception that might be raised. > > The true type is more complex; I'll add it to the base environment. > -- > sam th > sa...@ccs.neu.edu > _ > For list-related administrative tasks: > http://lists.racket-lang.org/listinfo/dev > _ For list-related administrative tasks: http://lists.racket-lang.org/listinfo/dev
Re: [racket-dev] typed/scheme n00b question
Sorry.. The return type should be (U Integer Void exn:fail:filesystem) - Original Message - From: "Hari Prashanth" To: "John Clements" Cc: "plt-dev Developers" Sent: Sunday, September 5, 2010 3:06:49 AM GMT -05:00 US/Canada Eastern Subject: Re: [racket-dev] typed/scheme n00b question Is this what you are looking for? (require/typed racket/base [file-or-directory-modify-seconds (String (Option Integer) (-> exn:fail:filesystem) -> (U Integer Void))]) Hari - Original Message - From: "John Clements" To: "plt-dev Developers" Sent: Sunday, September 5, 2010 1:44:17 AM GMT -05:00 US/Canada Eastern Subject: [racket-dev] typed/scheme n00b question I'd like to write a typed/racket or typed/racket/base program that uses "file-or-directory-modify-seconds". I get this error: Type Checker: untyped identifier file-or-directory-modify-seconds imported from module in: file-or-directory-modify-seconds If this function were acquired using a 'require', I see that I could use 'require/typed' to associate a type with it. I don't see how to apply this to functions that come in as part of the language. I tried various decorations to wrap the use of the function in checks, but then realized that the type checker wasn't complaining that the value had the 'Any' type, but instead that the value was untyped, which suggests that type-futzing (checking that it's a procedure, etc.) was unlikely to help. What's the (presumably obvious?) solution to this? John _ For list-related administrative tasks: http://lists.racket-lang.org/listinfo/dev _ For list-related administrative tasks: http://lists.racket-lang.org/listinfo/dev _ For list-related administrative tasks: http://lists.racket-lang.org/listinfo/dev
Re: [racket-dev] typed/scheme n00b question
Is this what you are looking for? (require/typed racket/base [file-or-directory-modify-seconds (String (Option Integer) (-> exn:fail:filesystem) -> (U Integer Void))]) Hari - Original Message - From: "John Clements" To: "plt-dev Developers" Sent: Sunday, September 5, 2010 1:44:17 AM GMT -05:00 US/Canada Eastern Subject: [racket-dev] typed/scheme n00b question I'd like to write a typed/racket or typed/racket/base program that uses "file-or-directory-modify-seconds". I get this error: Type Checker: untyped identifier file-or-directory-modify-seconds imported from module in: file-or-directory-modify-seconds If this function were acquired using a 'require', I see that I could use 'require/typed' to associate a type with it. I don't see how to apply this to functions that come in as part of the language. I tried various decorations to wrap the use of the function in checks, but then realized that the type checker wasn't complaining that the value had the 'Any' type, but instead that the value was untyped, which suggests that type-futzing (checking that it's a procedure, etc.) was unlikely to help. What's the (presumably obvious?) solution to this? John _ For list-related administrative tasks: http://lists.racket-lang.org/listinfo/dev _ For list-related administrative tasks: http://lists.racket-lang.org/listinfo/dev
Re: [racket-dev] Problem with GC or with my machine?
Yes the problem goes away once I turn off the optimizer... I have attached the code. #lang typed/racket (require "que.ss") (head (queue 1 2 3 4)) - Original Message - From: "Vincent St-Amour" To: "Matthew Flatt" Cc: "Hari Prashanth" , "dev" Sent: Friday, September 3, 2010 11:39:50 AM GMT -05:00 US/Canada Eastern Subject: Re: [racket-dev] Problem with GC or with my machine? At Fri, 3 Sep 2010 09:34:10 -0600, Matthew Flatt wrote: > Thanks for sending the code. I see that it's using Typed Racket with > #:optimize. Maybe Vincent and Sam should take a look to make sure that > the optimizer isn't generating incorrect unsafe code? Yes, please send us the code. First thing you should try, though, is turn off the optimizer and see if the problem goes away. Vincent que.ss Description: Binary data _ For list-related administrative tasks: http://lists.racket-lang.org/listinfo/dev
[racket-dev] Problem with GC or with my machine?
I am getting the following error... And this is the only message I get... SIGSEGV MAPERR si_code 1 fault on addr 0xfffc This often means 0xfffc isn't getting marked, and was prematurely freed Aborted What does it mean? Has anyone seen this? If you want to take a look at the code that is causing this, let me know. Hari _ For list-related administrative tasks: http://lists.racket-lang.org/listinfo/dev
Re: [racket-dev] source distribution problems
I just built plt-src-unix.tgz. I looks good. I didn't see any errors. I built it on Ubuntu 10.04. Hari - Original Message - From: "Eli Barzilay" To: "Matthew Flatt" Cc: dev@racket-lang.org Sent: Friday, August 6, 2010 9:49:17 PM GMT -05:00 US/Canada Eastern Subject: Re: [racket-dev] source distribution problems On Aug 5, Matthew Flatt wrote: > We need to add "build on Linux from source distribution" to our > release-time checklist. Kevin, can we put that under your name? Added, but with Jon (who volunteered) -- also, he'll check the binary installer in both modes (which would catch the previous README problem). > I think we should also fix the 5.0.1 source bundles. Eli, would that be > reasonable? I've re-packaged them for all platforms (for windows too, even though the only change is the unused utils directory). The results are at http://tmp.barzilay.org/src/ -- can someone who is not running to catch a plane test them? -- ((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 _ For list-related administrative tasks: http://lists.racket-lang.org/listinfo/dev
Re: [racket-dev] P4P: A Syntax Proposal
I have heard students saying that they did not like Scheme syntax/parans even after using it for a whole semester. I really, to this day, haven't understood why they did not like parans. But given an option some people might start liking it/using it. I feel it would be a great idea to have P4P as an alternate. Hari - Original Message - From: "Neil Van Dyke" To: "Jos Koot" Cc: "PLT Developers" Sent: Wednesday, July 28, 2010 4:44:51 PM GMT -05:00 US/Canada Eastern Subject: Re: [racket-dev] P4P: A Syntax Proposal Jos Koot wrote at 07/28/2010 04:00 PM: > With a good editor, like that of DrSceme, pardon me, RdRacket, I experience > no difficulty at all with parentheses. As I believe Shriram said, the problem is the *perceptions* of people who think that parens are bad, not whether parens are actually bad. For decades, Lisp people have been saying "Try parens! You'll like 'em once you try 'em!" but that argument has not been as persuasive as we might've hoped in getting people to try. Regarding P4P, I have no real opinion on whether offering people a parens-free syntax is a good idea, so long as people who wish to use parens are not somehow marginalized somewhere along the line. -- http://www.neilvandyke.org/ _ For list-related administrative tasks: http://lists.racket-lang.org/listinfo/dev _ For list-related administrative tasks: http://lists.racket-lang.org/listinfo/dev
