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00:43 RacketCommitBot: [racket] plt pushed 1 new commit to master: http://git.io/I5A7Sw
00:43 RacketCommitBot: racket/master 3670916 Neil Toronto: Initial commit for `math/array' documentation; about 65% finished...
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01:47 Havvy: What is meant by this error?
01:47 Havvy: Err...gah. Error left my pastebin.
01:49 Havvy: Type Checker: untyped identifier curryr imported from module <typed/racket> in: curryr
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07:43 mye: I have a syntax object created with datum->syntax that I want to pass to macro as the stx parameter
07:43 mye: But as args are not passed to a macro, how else could I do that?
07:43 mye is still confused about macros
07:44 mye: I'm building up syntax as compile time and want to turn it into code with a macro also at compile time
07:49 mye: to put it another way, rather than writing the syntax behind a macro call I want to write a variable that is expanded to the syntax
07:55 neilv: can't you just yield a syntax object like #'(my-macro my-first-macro-arg my-second-macro-arg)
07:58 asumu: Havvy: it means that "curryr" hasn't been given a type, so you can't use it.
07:58 asumu: You can manually give it a type using `require/typed`.
07:59 Havvy: It's grabbed via #lang typed/racket so how would I use require/typed to give it a type?
07:59 asumu: curryr is defined in racket/function, IIRC.
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07:59 asumu: So you just require it from there.
08:01 Havvy: So something like (require/typed typed/racket/function curryr) ?
08:01 asumu: You need to give it a type when you `require/typed`.
08:02 asumu: (see examples here http://docs.racket-lang.org/ts-reference/special-forms.html?q=require/typed#(form._((lib._typed-racket/base-env/prims..rkt)._require/typed)) )
08:02 rudybot: http://tinyurl.com/cst6o7j
08:02 Havvy: I have no clue what type curryr would be...
08:03 asumu: You can give it whatever specific type you need it to have for your program.
08:03 Havvy: Ah. Alright.
08:04 Havvy still wonders what the type of curry and curryr would be other than specific instantiations.
08:04 asumu: (the function will get wrapped with a contract matching the type, so the worst that can happen is you get a contract error)
08:05 asumu: Yeah, it might be that curryr doesn't have a type because the general type is not expressible...
08:06 asumu: curry actually has a type.
08:06 asumu: rudybot: init typed/racket
08:06 rudybot: asumu: your typed/racket sandbox is ready
08:06 asumu: rudybot: curry
08:06 rudybot: asumu: ; Value: #<procedure:curry>
08:06 rudybot: asumu: ; stdout: "- : (All (a b c) (case-> ((a b -> c) a -> (b -> c)) ((a b -> c) -> (a -> (b -> c)))))\n"
08:07 Havvy: rudybot: curryr
08:07 rudybot: Havvy: I suspect you can mix and match "curry" with "curryr" to get what you want
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08:08 Havvy: A'ight. Thank you very much.
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08:25 RacketCommitBot: [racket] plt pushed 1 new commit to master: http://git.io/4v8bRg
08:25 RacketCommitBot: racket/master 24f358a Matthew Flatt: scribble latex: work around `\href{...#...}{...}' as a macro argument...
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09:24 RacketCommitBot: [racket] plt pushed 1 new commit to master: http://git.io/bAL32w
09:24 RacketCommitBot: racket/master d47bfc2 Matthew Flatt: raco setup: more consistent logging and pausing on db locks
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09:52 mye: ok I'll try with a humbler start: I'll pass the data directly first. Now I want to destructure it, but it has a hash table. Do I have to preprocess it or can syntax parse do this? https://gist.github.com/4143814
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09:53 mye: I want the hash content as pattern variables eg. type line block ...
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10:19 mye: so, if I want to remove the hash table to create syntax without it (eg hash->list), that wouldnt work because it doesn't guarantee order
10:19 mye plays the worlds smallest violin
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14:20 RacketCommitBot: [racket] plt pushed 1 new commit to master: http://git.io/c1ysfA
14:20 RacketCommitBot: racket/master 6c0baa0 Robby Findler: make sure there is a dc before trying to size text
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15:36 lewis1711: http://pastebin.com/cXLS7w08 I can't figure out why the unit test on 116 is failing. dr racket highlights the hash-ref form from line 27 and says it expects two arguments. the test right above it works
15:37 mithos28: do you intend to do the lookup in the parent even if the key is in the current one?
15:38 mithos28: I think you want to wrap your cond on line 29 with a (lambda () …)
15:39 lewis1711: ahhh, of course, the optional argument to hash-ref needs to be a procedure
15:39 lewis1711: thanks mithos28 that appears to have solved it
15:40 mithos28: actually it doesn't need to be a procedure, which is useful in cases like (hash-ref a-hash key #f)
15:41 mithos28: but in your case, if you only want to do certain computation in case of a lookup error then you do need a procedure
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15:48 lewis1711: yeah I see it now
15:48 lewis1711: hmm I think all I need to do is make the table constructor a bit nicer with a macro, then I'm done
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16:08 mye: what is the correct _type to use for void pointers in the ffi. As I understand _void is for rackets void
16:08 mye: I can't find it in the docs unfortunately
16:09 mithos28: why are you using a void pointer?
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16:11 mye: mithos28: I'm writing libgit2 bindings and some functions return or take them
16:12 mithos28: but thats just because c doesn't offer polymorphism
16:12 mithos28: what kind of values do you need to pass in to the foreign call
16:12 mithos28: just use a pointer for that
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16:15 mye: here a void pointer is cast to (const unsigned char*) : http://libgit2.github.com/api.html#rawread
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16:16 mye: I'm unsure what to write in the -> return field eg. (data : _void) seems wrong
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16:16 mithos28: mye: can you point me to acutal documentation versus an example
16:19 frank_____: have a problem uprgading Racket under ubuntu "WARNING: /home/fweytjens/share/racket/doc/xml/out.sxref::0: read (compiled): code compiled for version 5.3, not 5.1.1 "
16:20 mithos28: frank_____: what does 'which -a racket' return?
16:21 mithos28: mye: In the example of an unsigned char* isn't it just returning bytes
16:23 mye: mithos28: hm, right it's probably save to just assume that. Anyway, I now know that there isn't a special ctype in the ffi for this (probably), I thought I'd missed something.
16:26 frank_____: ?
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16:28 frank_____: "/home/fweytjens/bin/racket" and "/usr/bin/racket"
16:30 mye: frank_____: to me it looks like your'e starting racket 5.1.1 and it tries to read files created in your home written by 5.3 (just a guess)
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16:31 offby1 ponders putting a sofa and dining-room table onto frank_____s tailgate
16:34 lewis1711: can macros deal with named arguments like procedures can?
16:35 frank_____: > mye yes i try to upgrade from 5.1.1 to 5.3 but it still starts the old version
16:35 lewis1711: frank_____: I use ubuntu. how are you upgrading?
16:35 lewis1711: with the shell script?
16:36 offby1: lewis1711: yes.
16:36 lewis1711: http://stackoverflow.com/questions/10094393/can-racket-macros-take-keyword-arguments my bad
16:36 rudybot: http://tinyurl.com/dyt8tol
16:38 frank_____: <lewis> i ran the sh file for ubuntu karmic
16:41 lewis1711: oh, huh. I never have any issues. i always do a unix style install though, which is the non-default option
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16:43 frank_____: <lewis1711> will try that brb
16:47 Nisstyre-laptop: sup #racket
16:54 lewis1711: I just strung together two trivial macros all by myself. I am inappropriately proud of myself
16:54 lewis1711: http://pastebin.com/dDLHqmLi though I have no doubt made a silly error LOL
16:56 frank_____: <lewis1711> ok i can start the newer version, but only using sudo,when i just type drracket he don't know the file
16:57 lewis1711: that's... weird
16:57 lewis1711: so you don't have permission to run drracket unless you are root?
16:57 lewis1711: but "sudo drracket" works?
16:58 frank_____: "-rwxrwxr-x 1 root root 1558 Nov 25 22:51 drracket "
16:58 frank_____: yes
16:59 lewis1711: ohh
17:00 lewis1711: frank_____: did you do "sudo racket-script.sh", without doing "chmod +x" first?
17:00 lewis1711: (I know it's nto called racket-script, but you know what I mean)
17:01 lewis1711: chmod +x racket-script.sh; sudo ./racket-script.sh *SHOULD* work
17:02 frank_____: i tryed simply drracket first than a chmod 777 drracket, which did not succeed
17:03 lewis1711: the install script I mean
17:06 frank_____: well i made that one executable yes
17:12 frank_____: lewis > very strange when i do ls  dr* , then copy drracket open a new terminal and paste it, then it starts??
17:13 lewis1711: :/
17:13 lewis1711: maybe try a clean install
17:15 frank_____: ok thank you Lewis
17:19 frank_____: lewis < it also starts correctly from the icon in the launcher bar, so no more problem.
17:20 lewis1711: hooray :D
17:24 lewis1711: why do all racket macros just return "bad syntax" when you call them  incorrectly?
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17:35 mithos28: lewis1711: Which macros, ones you write or ones that are in the standard library
17:36 lewis1711: mithos28: standard library
17:36 mithos28: that is a bug, according to sam
17:36 mithos28: I would say it is a bug aswell
17:37 lewis1711: oh yes. should you bother doing exceptions for macros or just leave them to say "use does not much pattern ..." ?
17:38 mithos28: lewis1711: You are writing your own? Use syntax-parse
17:38 mithos28: it gives nice error messages
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20:01 RacketCommitBot: [racket] plt pushed 2 new commits to master: http://git.io/PyqKbw
20:01 RacketCommitBot: racket/master 9062d27 Matthew Flatt: make place-channel receives more fair
20:01 RacketCommitBot: racket/master 31e644e Matthew Flatt: raco setup: add a layer of db write locking, db read fallback...
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20:06 lewis1711: http://pastebin.com/05LLFiNb why does match-f1 return true for both f1 and f2?
20:07 (quit) Blkt: Quit: good night people!
20:09 offby1: my guess is that (foo) and (foo) are eqv, and match uses eqv.
20:09 offby1: rudybot: eval (struct foo ())
20:09 rudybot: *offby1: Done.
20:10 offby1: rudybot: eval (define f1 (foo))
20:10 rudybot: *offby1: Done.
20:10 offby1: rudybot: eval (define f2 (foo))
20:10 rudybot: *offby1: Done.
20:10 offby1: rudybot: eval (define (match-f1 f) (match f [f1 #t]))
20:10 rudybot: *offby1: Done.
20:10 offby1: rudybot: eval (eqv? f1 f)
20:10 rudybot: *offby1: error: reference to an identifier before its definition: f in module: 'program
20:10 offby1: rudybot: eval (eqv? f1 f2)
20:10 rudybot: *offby1: ; Value: #f
20:10 offby1: oops
20:10 jonrafkind: eqv? is only #t if eq? is #t afaik
20:10 offby1: hmm
20:10 offby1 rubs chin
20:10 lewis1711: yeah i tested that
20:10 lewis1711: they're neither eqv, eq or equal
20:10 jonrafkind: or is it the other way around
20:10 offby1: (match-f1 f1)
20:10 offby1: rudybot: (match-f1 f1)
20:10 rudybot: *offby1: ; Value: #t
20:10 offby1: rudybot: (match-f1 f2)
20:10 rudybot: *offby1: ; Value: #t
20:11 jonrafkind: eqv is such a badly named function
20:11 offby1 rubs chin some more
20:11 jonrafkind: so is eq?
20:12 offby1: I wonder if match is expecting a predicate ...
20:12 offby1: rudybot: eval (frotz 'hey-lookit-me)
20:12 rudybot: *offby1: error: reference to an identifier before its definition: frotz in module: 'program
20:12 offby1: rudybot: eval (define frotz 'hey-lookit-me)
20:12 rudybot: *offby1: Done.
20:13 offby1: rudybot: eval (define (match-frotz f) (match f [frotz #t]))
20:13 rudybot: *offby1: Done.
20:13 offby1: rudybot: eval (match-frotz 999)
20:13 rudybot: *offby1: ; Value: #t
20:13 offby1 beams
20:14 offby1: lewis1711: so, I think you want something like "foo?" in your "match", instead of "f1"
20:14 lewis1711: but they're both foo?
20:15 offby1: I don't understand that question
20:15 lewis1711: to be clear, i want something that matches f1 but not f2
20:15 lewis1711: I guess I should just use a cond actually
20:15 offby1: I guess you'd want (lambda (thing) (eq? thing f1)) then
20:15 offby1: not sure how to wedge that into "match" but I assume it's doable
20:16 offby1: you _might_ consider plain old "cond" instead of match
20:16 lewis1711: yeah
20:16 lewis1711: I don't know why that took so long to occur to me
20:16 lewis1711: I generally reach for "match" by default
20:16 lewis1711: that works anyway
20:17 offby1: I imagine you could get match to work.  But if you don't need its awesome superpowers, it's simpler to use cond
20:17 asumu: lewis1711: by using `f1` it's just matching against anything, since `f1` is just a name there.
20:18 lewis1711: ...oh yeah
20:18 offby1: and binding the value to f1?
20:18 asumu: You probably want the == matcher.
20:18 asumu: rudybot: (define f1 (foo)
20:18 rudybot: asumu: hm, usually that causes Riastradh to point out that let1 is in the base library under name foo
20:19 offby1 <3 rudybot
20:19 asumu: rudybot: eval (struct foo ()) (define f1 (foo)) (define (match-f1 f) (match f [(== f1) #t] [_ #f])) (match-f1 f1)
20:19 rudybot: asumu: error: Type Checker: Summary: 2 errors encountered
20:19 asumu: rudybot: init racket
20:19 rudybot: asumu: your sandbox is ready
20:19 asumu: rudybot: eval (struct foo ()) (define f1 (foo)) (define (match-f1 f) (match f [(== f1) #t] [_ #f])) (match-f1 f1)
20:19 rudybot: asumu: ; Value: #t
20:19 asumu: rudybot: (match-f1 'something-else)
20:19 rudybot: asumu: ; Value: #f
20:20 asumu: There we go.
20:20 offby1: huh, I never knew about ==
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20:22 lewis1711: me neither. handy
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20:56 lewis1711: can one give the same macro two different names?
20:59 offby1: I don't think so, quite.
20:59 offby1: You can presumably have one expand to a call to the other.
21:01 lewis1711: hmm, what about exporting a macro as two different names?
21:02 offby1: dunni
21:02 offby1: dunno
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21:04 jonrafkind: good question
21:05 jonrafkind: apparently you can
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21:19 lewis1711: jonrafkind: oh? :)
21:19 jonrafkind: (provide x (rename-out [x b]))
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21:20 lewis1711: nice
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21:23 lewis1711: I don't see why the diamond inheritance problem is such a big deal - just send the message the the superclasses in-order
21:23 lewis1711: or parent objects, for prototypes
21:23 jonrafkind: I haven't dealt with the diamond problem in a long time but I thought it had to do with each sub-class sending different parameters to the super class or something
21:24 lewis1711: http://en.wikipedia.org/wiki/Multiple_inheritance#The_diamond_problem
21:25 jonrafkind: ah right the multiple function problem
21:25 jonrafkind: well in that case the Button class should declare which functions its inheriting
21:26 lewis1711: what's wrong with juts doing it in the order inherited?
21:26 jonrafkind: well I guess thats ok too
21:26 jonrafkind: seems to be what c++ and CL do
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21:27 lewis1711: I never got why *that* was such a huge problem that it had to be avoided.
21:28 jonrafkind: doesn't the paragraph about which 'equals' method explain it?
21:28 jonrafkind: or are you saying why use multiple inheritance in the first place?
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21:29 lewis1711: jonrafkind: I would say the bug there is not defining equals in button in the first place
21:29 lewis1711: even with single inheritance that'd be dangerous
21:30 jonrafkind: ok but what about arbitrary functions that you wish to inherit. surely a subclass doesnt have to redefine every function it inherits
21:31 jonrafkind: probably things get even wierder if one function is declared 'final' in class A and the sibling class has the same non-final function
21:31 jonrafkind: then its not clear if the subclass which inherits from both can redefine that function
21:37 lewis1711: hmm
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21:38 lewis1711: yeah even with MI it'd still probably be best practice not to inherit from two "fully formed" classes
21:38 jonrafkind: well two classes that have conflicting sets of methods
21:38 lewis1711: you could have classes that act as mixins
21:38 jonrafkind: i have never run into MI problems in all my years of c++ programming
21:38 jonrafkind: and its not an issue in java/scala
21:39 lewis1711: it's illegal in both, isn't it? I'm sure it is in java
21:39 lewis1711: and scala has that whole traits system
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21:42 jonrafkind: java doesn't have MI
21:42 jonrafkind: yea scala has traits
21:42 jonrafkind: the worst you can get in java is implementing from two interfaces that declare the same method
21:43 jonrafkind: i ran into that issue once or twice, usually its a major pain to deal with because if you can't modify the interfaces you are hosed
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21:58 RacketCommitBot: [racket] plt pushed 2 new commits to master: http://git.io/aMX2vQ
21:58 RacketCommitBot: racket/master 0264d3d Robby Findler: Adjust text%s so they don't call on-reflow as often...
21:58 RacketCommitBot: racket/master 5197649 Robby Findler: improve the interactivity of DrRacket's search...
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22:02 sw2wolf: I want to install racket on my freebsd box. `make` is fast but `make install` is too slow. How can i make `make install` fast ?
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22:07 lewis1711: there is a list findf :) but no vector findf :(
22:07 jonrafkind: sw2wolf, what part is it at?
22:07 jonrafkind: docs?
22:07 sw2wolf: raco setup: in ***
22:07 jonrafkind: is there more to it
22:08 sw2wolf: i have to wait ...
22:08 jonrafkind: im not exactly sure what *** refers to
22:08 jonrafkind: what speed is your box?
22:09 sw2wolf: such as "mred/private" "racket/gui/lang" ...
22:09 jonrafkind: well thats what i meant by 'is there more to it'
22:09 jonrafkind: usually i skip building most of the collects and just explicitly build the ones i normally use
22:09 sw2wolf: how ?
22:10 jonrafkind: or you can skip almost all of them and if you own the collects tree you can do 'raco make x.rkt' which will build the collects that x.rkt depends on
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22:10 jonrafkind: you might have to build the raco collect though
22:10 jonrafkind: here is my build command for racket git
22:10 jonrafkind: make && make plain-install && raco setup --no-docs compiler macro-debugger syntax make setup scribble honu mred gui-debugger xrepl scriblib scheme raco readline
22:10 jonrafkind: plain-install installs the new binaries
22:10 jonrafkind: but doesn't set up the collects tree
22:10 sw2wolf: thanks
22:11 lewis1711: woo, for/first. I knew there would be a list comprehension way around it
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22:41 francisl: (require xrepl) take full 100% cpu, is there a fix?
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22:44 jonrafkind: i dunno, are you running from an unbuilt source tree?
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22:46 francisl: non, binary 64 mac os x from racket-lang download page
22:47 francisl: I upgrade from 5.2 to 5.3.1 same thing
22:48 jonrafkind: not sure.. submit a bug report i guess
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22:51 lewis1711: hmmm one reason maybe why multiple inheritance is avoided - it's annoying to code for
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23:07 lewis1711: ok, depth-first left to right multiple inheritance seems to be working
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23:08 RacketCommitBot: [racket] plt pushed 2 new commits to master: http://git.io/XuJ--w
23:08 RacketCommitBot: racket/master 8f3343c Nadeem Abdul Hamid: automatic parenthesis mode improvements...
23:08 RacketCommitBot: racket/master 49a0b95 Robby Findler: tweak to Nadeem's commit
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