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00:13 ozzloy: anyone awake in here?
00:13 mithos28: nope
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00:30 m4burns: ozzloy: are you?
00:32 ozzloy: oh
00:32 ozzloy: i didn't expect a response
00:33 ozzloy: i am awake, yes
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00:37 m4burns: well, so am i
00:37 m4burns: i think
00:37 m4burns: ozzloy: what's up?
00:40 ozzloy: https://gist.github.com/4536472 i'm having a little trouble with macros
00:40 mithos28: ozzloy: Use more of them, that is always the solution
00:41 ozzloy: when i type that in at the repl, it works as in the example, but not when i say in a file
00:41 jonrafkind: oh lol you're doing the example from my phases doc
00:41 ozzloy: save in a file
00:41 ozzloy: oh? neat
00:41 mithos28: ozzloy: use #lang racket/load
00:42 mithos28: Thats if you want to replicate the repl
00:42 ozzloy: kindaa
00:42 jonrafkind: ya
00:42 ozzloy: it'd be cool to know why it works in a repl and not when run from a file
00:42 ozzloy: more than "repl handles modules differently"
00:42 mithos28: Because you are using submodules when you put it in a #lang racket/base file
00:43 ozzloy: and what am i using in a repl?
00:43 mithos28: top level modules
00:43 jonrafkind: i should put a note in the doc about racket/load if you put the code in a file
00:43 mithos28: #lang racket/base expands out to (module _ racket/base ….)
00:44 mithos28: where …. is the body of the file
00:44 mithos28: so you have modules nested in modules
00:44 ozzloy: and _ is the name of the fiile
00:44 ozzloy: or somehow determined by the name of the file
00:44 mithos28: _ is complicated, and uninmportant in that case
00:45 ozzloy: ok, so in a repl it's using "modules" and not "submodules"?
00:45 mithos28: right
00:46 ozzloy: and top level modules can reference each other using (require 'module-name)
00:46 ozzloy: and submodules cannot
00:46 mithos28: unless you did something like (module a racket (module inner racket …))
00:47 ozzloy: ?
00:48 mithos28: ozzloy: toplevel modules defined in the repl are associated with a name and you can use (require 'name)
00:48 mithos28: that was how you could use submodules while using the repl
00:48 ozzloy: i'm with you so far
00:48 ozzloy: on that part
00:49 ozzloy: i'm not sure how (module a racket (module inner racket ...)) helps module b see module a
00:49 mithos28: it doesn't
00:49 ozzloy: oh
00:50 mithos28: Quick answer: don't nest modulo forms
00:50 mithos28: module*
00:50 mithos28: Once you are finished exploring phases, then look at submodules
00:50 ozzloy: i'm stuck
00:51 ozzloy: i guess maybe i can leave myself a TODO with a note to return to this
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00:58 ozzloy: there should be a note that says "modules, here be dragons"
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01:10 ozzloy: i appear to be able to continue with the example if i have #lang racket/load\n(require racket/base (for-syntax racket/base racket/load ...
01:10 ozzloy: i'll do that for now and treat it as a black box until i read through the module section of the guide
01:11 ozzloy: thanks mithos28 and jonrafkind
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01:48 ozzloy: jonrafkind, would it be fair to say phase level between modules is relative?
01:48 jonrafkind: yes thats the point
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01:48 ozzloy: kinda like voltages?
01:48 ozzloy: kk
01:49 ozzloy: i got sidetracked for the last 1/2 hour.  glad you're still here and responding
01:50 ozzloy: oh, haha, *the next section* says exactly that
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01:55 ozzloy: jonrafkind, is there something like (require (for-meta N ...)) for (begin-for-syntax ...)?
01:55 ozzloy: like (begin-meta N ...)
01:56 jonrafkind: no but you could write a macro to do that
01:56 ozzloy: instead of (begin-for-syntax(begin-for-syntax ...))
01:56 jonrafkind: which would expand to N levels of (begin-for-syntax)
01:56 jonrafkind: how many do you need?
01:56 ozzloy: heh, well of course you can
01:56 jonrafkind: needing more than 2 is pretty strange
01:56 ozzloy: i don't.  idle curiosity
01:56 ozzloy: since there was a require version, i thought there'd be a corresponding one
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03:44 tim-brown: i had an issue with syntax highlighting recently
03:44 tim-brown: it manifested itself on linux and windows when i upgraded racket
03:45 tim-brown: i managed to clean it up by removing my .racket directory in linux...
03:45 tim-brown: how do i do the equivalent on Win64?
03:45 tim-brown: (i.e. as if i'd never run racket before)
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03:48 bniels: tim-brown, probably removing some racket dir in %APPDATA% (input %APPDATA% into the address line of windows explorer or into the search field of vista or later)or one of the various other places where windows stores user-related file
03:50 tim-brown: bneils: spot on! thanks
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05:41 tim-brown: is there a simple guide to getting the location of an error generated by a macro (specifically a syntax-parse macro) reported in the source code
05:41 tim-brown: ?
05:42 tim-brown: see https://github.com/tim-brown/plt-games-racket-tested the second test reports an error at the macro line, and not in the #:test-= part of the code
05:42 tim-brown: is there a tutorial in srclocs that i can read?
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06:41 alagabes: Hello, I have a problem with racket/gui
06:42 alagabes: I was trying to write program that visualise a process of solving hanoi riddle
06:42 alagabes: It works fine on linux
06:42 alagabes: but on windows nothing is drawn on the canvas
06:43 alagabes: here comes code
06:44 alagabes: http://paste.lisp.org/display/134659
06:44 alagabes: please, ignore comments
06:44 alagabes: I should have write them in english
06:47 alagabes: I supouse there's a problem with canvas flushing
06:48 alagabes: Basicaly I'm drawing on dc (send canvas get-dc)
06:48 alagabes: and on linux it works just fine
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10:08 RacketCommitBot: [racket] plt pushed 2 new commits to master: http://git.io/Gdu-DQ
10:08 RacketCommitBot: racket/master c8a1ec8 Robby Findler: fix bug in online check syntax's save file notification...
10:08 RacketCommitBot: racket/master 1edec6a Robby Findler: move the ╬ char and friends into a separate file...
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10:13 RacketCommitBot: [racket] plt pushed 2 new commits to master: http://git.io/HdRduA
10:13 RacketCommitBot: racket/master 7df831f Matthias Felleisen: universe restart test, bug from Marco
10:13 RacketCommitBot: racket/master fbb3145 Matthias Felleisen: fixed a bug that prevented universe from restarting on some occasions
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10:14 asumu: alagabes: I think you may want to use the canvas's on-paint method instead.
10:15 asumu: See the note at the top of http://pre.racket-lang.org/docs/html/gui/canvas___.html
10:15 asumu: In particular, it says that drawing outside of the on-paint method can be transient.
10:15 asumu: So that other window events can blank out the canvas.
10:16 asumu: (also, nice animation)
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11:01 supermao: Hey guys
11:02 supermao: what is "result: unknown definition form at: result in: result " error?
11:02 supermao: It comes from this define
11:02 supermao: (define/cost (reverse list)    (define/cost (reverse-helper list acc)     (cond[(empty? list) acc]          [else (reverse-helper (rest list) (cons (first list) acc))]))   (reverse-helper list empty))
11:02 supermao: anyone knows? thanks
11:05 carleastlund: supermao: The define/cost macro is specific to CS4800 here at Northeastern, so it'll be hard for anyone but me to answer questions about it.  That error is a bug in define/cost that I fixed just a short while ago.  If you update to the latest version of define/cost in the git repository, that bug should go away.
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11:06 carleastlund: supermao: Also, I don't recommend using define/cost inside define/cost.  I should fix that so it works, but for now, inside of define/cost you can just use regular define and still get costs worked out for you.
11:07 supermao: cool
11:07 supermao: thanks
11:07 supermao: I am glad you are here Carl, very helpful
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12:19 grettke: syntax-case question. I'm matching on zero or more arguments (eg: arg ...), I need to convert that to a list. Mental block on how.
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12:19 mithos28: (syntax->list #(arg …))
12:19 samth: grettke: (syntax->list #'(arg ...))
12:19 grettke: samth: thanks
12:19 grettke: mithos28: thanks
12:19 mithos28: mine is mistyped
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12:40 RacketCommitBot: [racket] plt pushed 1 new commit to master: http://git.io/JE2N6Q
12:40 RacketCommitBot: racket/master f315880 Eric Dobson: Replace uses of Type? with Type/c?.
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13:46 RacketCommitBot: [racket] plt pushed 1 new commit to master: http://git.io/6582YA
13:46 RacketCommitBot: racket/master 5fe004c Eric Dobson: Make TR compile with contracts enabled again.
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15:30 asumu is sad that he can't submit bug reports in his DrRacket
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15:32 alagabes: thank you asumu :)
15:32 asumu: alagabes: did it work?
15:32 soegaard: happy to hear, you can't find any bugs
15:32 asumu: soegaard: I can still submit them through the web, mwahaha.
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15:33 alagabes: asumu: well, I haven't tried your way, I just got back home
15:33 alagabes: but, I've found other workaround
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15:34 alagabes: 1. show window at runtime (that's pretty bad)
15:34 alagabes: 2. I've forgot to call set-scale on cavas
15:34 alagabes: *canvas
15:35 dyoo: asumu: why doesn't bug submission work through DrRacket?
15:35 alagabes: I'll work on it tommorow i think, now I'm finishing my virtual file system in C (gosh, how I hate imperative languages)
15:35 dyoo: alagabes: that does sound like a cool project though
15:36 alagabes: dyoo: well, it's fun to work on it
15:36 alagabes: and see it grows
15:36 soegaard: Apropos bugs. At work we have had some problems, where some teachers couldn't log into the student administration system. It seemed random who were affected.
15:37 dyoo: soegaard: ugh.  internally developed system, or outsourced?
15:37 soegaard: Today we got an email from the it staff. When uploading files for students, we must not use  '   in file names...
15:37 dyoo: dear god.  It's bobby tables all over again.
15:37 alagabes: but code is getting pretty ugly as deadline emerging
15:37 alagabes: >bobby tables
15:37 soegaard: Commercial system developed by CSC.
15:37 alagabes: that's funny
15:39 soegaard: Even more funny: If I send such a file to a collegue, he is affected too.
15:39 dyoo: I still remember reading a broken SQL tutorial way on an O'Reilly site with the typical SQL injection exploit.  I emailed the author and told him: "Try inserting the word O'Reilly."
15:39 soegaard: hehe
15:40 dyoo: ah, yeah, here it is: http://mail.python.org/pipermail/tutor/2003-April/022010.html
15:45 mye: dyoo: does ragg as a lang in submodule like (module parser ragg …) work? (I tried but couldn't get it to work, might have done something wrong when installing or so).
15:45 soegaard: I think I will post a copy of the Bobby Tables XKCD.
15:45 dyoo: oh!  Didn't think about submodule work.  Give me a sec, let me make sure it works...
15:45 dyoo: the internal s-expression language is, at the very least, completely undocumented… :(
15:45 soegaard: Apropos ragg. I have a nearly finished implementation of MiniPascal.
15:46 mye: dyoo: ragg seems like what I wished I had a couple month ago when I wrote my turtle parser. Thanks for it!
15:46 dyoo: mye: let me know how I can make it better.  So far as I can tell, no one actually uses it yet except jpolitz, so I've only been getting feedback from them.
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15:46 RacketCommitBot: [racket] plt pushed 1 new commit to master: http://git.io/SqBIOg
15:46 RacketCommitBot: racket/master 28d4610 Asumu Takikawa: Add tests for PR 13094....
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15:48 soegaard: One thing I miss, is a way to communicate information from the parser to the lexer.
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15:48 RacketCommitBot: [racket] plt pushed 1 new commit to master: http://git.io/QRfGEA
15:48 RacketCommitBot: racket/master 131af99 Robby Findler: fix bug introduced in f315f08dc3af4879b5456a1274b143e637cac47d...
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15:48 soegaard: In the beginning of a Pascal program, there is an optional constant section, where one can define constants like x=5.
15:49 dyoo: soegaard: hmmmm.
15:49 soegaard: In the official grammar there is a difference between a constant-identifier and an variable-identifier.
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15:50 soegaard: But the lexer has no chance of knowing which kind of identifier it sees.
15:50 soegaard: Unless the parser communicated the list of constant identifiers back to the lexer after parsing the constant section.
15:51 soegaard: There are only a few places where it is important.
15:52 dyoo: mye: https://gist.github.com/4541938
15:52 soegaard: After the constant section, there is an optional type declaration section, where one can use constant names in array index ranges.
15:52 soegaard: Here one can not use variable identifiers.
15:53 dyoo: soegaard.  I see.  How do other parsing frameworks allow communication from the parser to the lexer?
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15:53 RacketCommitBot: [racket] plt pushed 1 new commit to master: http://git.io/EUlDpg
15:53 RacketCommitBot: racket/master 986e695 Neil Toronto: Made arrays strict by default; please merge to release...
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15:54 dyoo: mye: apologies for it being completely undocumented.   I'll need to go and document what ragg's internal s-expression-based language is.
15:54 bremner: dyoo: hi, I think I'm going to go through some ragg examples in class next week. Hopefully it won't crash on me ;(
15:54 bremner: err, ;)
15:54 mye: sounds like http://en.wikipedia.org/wiki/The_lexer_hack
15:55 asumu: dyoo: fixed now, so it does work. :)
15:55 soegaard: Bison (and the lexer collection) uses annotations of the rules, which are triggered when the parser uses the rule.
15:55 dyoo: bremner: cool!  I was also going to go through terrence parr's Language Implementation Patterns.
15:56 bremner: dyoo: I mainly want to intro BNF, but its more fun if we can run examples.
15:57 soegaard: In my case it is no too hard, to fix the problem in the following phase.
15:57 dyoo: soegaard: yeah, I'm planning to incorporate certain kinds of semantic annotations and actions on rules, to do things like omit certain portions of the ast.  So I'll keep your use case in mind.
15:58 dyoo: bremner: I love the fact that the documentation to ragg is basically an answer to http://stackoverflow.com/questions/12345647/rewrite-this-script-by-designing-an-interpreter-in-racket
15:58 rudybot: http://tinyurl.com/cvepgrm
15:58 soegaard: I like ragg btw. It is simpler to use than the lexer collection, where one must fight to get the correct source location information.
15:58 mye: dyoo: Thx for the example. Is there a reason the BNF based syntax doesn't work for submodules? (I'm assuming this is possible with the submodules which it might not)
15:58 dyoo: so I'm definitely happy if it can help show BNF by example
15:59 dyoo: mye: I think the only obstacle is my unconventional use of # as additional comment syntax
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16:00 bremner: dyoo: yeah, for little demos it would be nifty to have a main submodule with tests in it.
16:00 bremner: I guess that's the same question about submodules.
16:01 dyoo: bremner: ok, I'll consider this.
16:03 soegaard: Not directly related to ragg, but a section on how to use the parser/compiler to write a repl would fit nicely into the example.
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16:36 RacketCommitBot: [racket] plt pushed 1 new commit to master: http://git.io/nuOUbQ
16:36 RacketCommitBot: racket/master 7ab7d97 Danny Yoo: Move cfg-parser from the algol60 collection to parser-tools....
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17:04 jonrafkind: how do you know what font a scribble document used in latex?
17:04 jonrafkind: i need to make some figures that use (text) with the same font as everything else
17:08 samth: jonrafkind: mostly controlled by the prefix
17:08 jonrafkind: what prefix
17:09 samth: the latex prefix that's inserted at the beginning of the generated latex
17:09 jonrafkind: the document class?
17:09 samth: no
17:09 jonrafkind: ???????????/////////////
17:09 jonrafkind: there are 492 lines of latex inserted before a single line of text that I wrote
17:10 samth: yes
17:10 samth: that code
17:10 jonrafkind: there is nothing in there about fonts
17:10 jonrafkind: except for usepackage{blah}
17:10 samth: right, so then nothing is changing your figure fonts except those packages and the documentclass and the rest of latex
17:11 jonrafkind: there is a font used for the main body text. a different font is used in the figures because im using slideshow/pict and (text)
17:11 jonrafkind: the question is what font should I pass to (text) to make it use the same font as the main body text
17:15 jonrafkind: ok through trial and error it seems I should use "times"
17:16 (part) mhi^
17:18 samth: jonrafkind: ah, that's a issue
17:19 samth: the answer is "it depends what font you're using in latex"
17:19 samth: but probably you're using "Computer Modern" in Latex
17:19 samth: and so you should install and use "latin modern" in racket
17:19 jonrafkind: but.. its using times
17:19 jonrafkind: i mean using "times" makes it look the same
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17:21 RacketCommitBot: [racket] plt pushed 2 new commits to master: http://git.io/q6ZXiA
17:21 RacketCommitBot: racket/master 3d1f8b4 Danny Yoo: Modify cfg-parser's treatment of error function so it can consume both arity-3 and arity-5 error functions....
17:21 RacketCommitBot: racket/master e9c5c78 Danny Yoo: Add documentation for cfg-parser.
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17:25 RacketCommitBot: [racket] plt pushed 1 new commit to master: http://git.io/zfY9yQ
17:25 RacketCommitBot: racket/master 8d00037 Danny Yoo: Remove paragraph about multiple start symbols, since cfg-parser doesn't support it.
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17:54 RacketCommitBot: [racket] plt pushed 1 new commit to master: http://git.io/6t2IDQ
17:54 RacketCommitBot: racket/master 8562310 Burke Fetscher: ACII art boxes keybinding - look a little harder for the box
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17:59 RacketCommitBot: [racket] plt pushed 2 new commits to master: http://git.io/wDDlIQ
17:59 RacketCommitBot: racket/master aa3f44d Danny Yoo: Replace non-greedy regexp with a char-complement to improve matching performance....
17:59 RacketCommitBot: racket/master 2051d42 Danny Yoo: Add more JSON tests for embedded quotes, backslashes, and errors.
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18:06 RacketCommitBot: [racket] plt pushed 1 new commit to master: http://git.io/B8L1Iw
18:06 RacketCommitBot: racket/master 7627e4c Danny Yoo: Add tests for regexp match to check for word break.
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18:23 RacketCommitBot: [racket] plt pushed 6 new commits to release: http://git.io/voGDdw
18:23 RacketCommitBot: racket/release 0b02ae8 Juan Francisco Cantero Hurtado: It fixes a crash on OpenBSD...
18:23 RacketCommitBot: racket/release 1de0465 Jay McCarthy: Working with links in collection testing...
18:23 RacketCommitBot: racket/release 478f3d6 Matthew Flatt: futures: bug fix...
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19:50 dented42: is there or will there ever be an effort to make racket's threads be balanced by several OS level threads to allow for thread parallelism?
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20:02 carleastlund: dented42, We are developing futures and places for OS-level parallelism.  Currently there is no work on OS-level parallelism for threads, mostly I think because of the GC issues that would raise.
20:03 dented42: right
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20:11 dented42: is there a way to see why a future was deemed 'unsafe'?
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21:12 asumu: dented42: there is a futures visualizer tool. I've never used it, but possibly it can help.
21:12 asumu: (there is a guide entry on it)
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21:31 bremner: is there a way in drracket to purge all non-textual elements?
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22:45 RacketCommitBot: [racket] plt pushed 1 new commit to master: http://git.io/vDX4zA
22:45 RacketCommitBot: racket/master 2f61d04 Burke Fetscher: ASCII art box - don't search past extra +x space
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