<< 19-09-2015 >>
00:00:38XeHow do I convert a varargs to a sequence?
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04:22:19nchambersI thought it was done automatically?
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09:25:49AraqXe: via @
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12:15:13dom96hello everyone
12:15:18dom96happy saturday
12:15:25tymatanyone seen this error: https://github.com/nim-lang/Nim/issues/3346
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12:17:42dom96tymat: hrm, let me take a look
12:18:26dom96tymat: s/include/import/
12:22:24gokr1dom96: Thanks
12:23:58tymatah gotcha
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13:02:22NimBotnim-lang/Nim devel 492f5eb Dominik Picheta [+0 ±1 -0]: Fixes asyncnet.recvLine. Fixes #3346.
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13:14:07softinioHappy Saturday
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14:24:40dom96softinio: thank you :)
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15:40:22Araqdoes pango work with SDL2?
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16:43:16Jehan_I think it may be a good idea to moderate posts that have the word "kitchen" in the subject line.
16:43:30Jehan_Or simulate a server error. :)
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16:46:47Araqyeah, it's pretty easy to do
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17:08:48dom96Jehan_: yeah, on my todo
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17:45:44federico3any documentation on packing/unpacking binary structures?
17:51:29dom96don't think so
17:52:44federico3at least few examples? Sounds like a basic requirement for implementing network protocols
17:53:01yglukhovI don't think packing/unpacking is applicable to Nim. They are kinda already packed =)
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17:53:40yglukhovIf you're familiar with C, Nim is pretty much the same with struct layout
17:55:01federico3yglukhov: e.g.?
17:56:14yglukhovtype MyBinaryMsg = tuple[kind: int32, payload: int32]
17:56:21yglukhovvar myMsg : MyBinaryMsg
17:56:39yglukhovmySocket.send(addr myMsg, sizeof(myMsg))
17:56:44yglukhovthats it
17:57:06dom96yep, what yglukhov said :)
17:59:46federico3yglukhov: mh, I saw some examples of using tuples for packing: are they designed to do that (forever) or could the implementation change in future and break that code?
18:01:04yglukhovhmm. that's a nice question. =) the simple answer is yes, they will remain compatible in future.
18:01:21yglukhovbut the right answer is a bit more complicated.
18:02:05yglukhovbut still yes %)
18:02:26yglukhovalso you can use objects, not only tuples.
18:03:24federico3what about unpacking? I suppose you cannot unpack into a tuple that contains (variable-length) strings
18:03:55yglukhovno, and you can't "pack" a tuple with a string as well.
18:04:06federico3uint8 arrays?
18:05:20yglukhovyep. or. var l : int32 = myString.len; mySock.send(addr len, sizeof(len)); mySock.send(addr myString[0], l)
18:05:58yglukhovreceiving is just a bit more complicated. read the length. alloc string with capacity. read into first char length bytes.
18:06:43dom96you could also serialise your data structure using the marshal module
18:07:16federico3dom96: that would produce JSON tho
18:10:24dom96federico3: would be cool if you modified the marshal module to produce a binary format
18:10:46yglukhovargh, just wanted to say that! =)
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18:20:39federico3dom96: given that I'm asking how to do basic pack/unpack I don't see that happening :D
18:22:57dom96then just create a nice API over the low-level packing that yglukhov demonstrated :)
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18:31:10federico3dom96: with some DSL Nim would make very nice packet generators
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18:38:46dom96federico3: definitely
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19:07:24Jehan_If you use tuples or objects to send binary data, be careful that endianness doesn't matter (or the size of ints).
19:07:39onionhammerdom96 araq anyone looked at the CPP back end issue yet?
19:07:56onionhammerhttps://github.com/nim-lang/Nim/issues/3299
19:08:18Jehan_It's also possible to write a variant for the marshal module to do binary serialization. I got started on that one day, but never made it far (because I didn't really need it myself and had other things to do).
19:08:38Jehan_Ad-hoc binary marshalling of data structures is pretty easy, though.
19:08:57dom96onionhammer: nope, not yet sorry.
19:09:02dom96I'll +1 it
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19:09:23dom96or better yet ping Araq
19:10:05federico3Jehan_: endianness does matter (obviously ;)) and that's also why I was asking
19:10:48Jehan_But really, it's not hard to write ints etc. in endian-neutral order to a string (or read them from the string).
19:11:32onionhammerdom96 its happening on osx as well
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19:13:59Jehan_onionhammer: You can fix the second problem with --passC:-Dconst=
19:14:50onionhammersorry?
19:14:51Jehan_Or by using gcc as the backend.
19:15:10Jehan_onionhammer: The github issue.
19:15:10onionhammerg++?
19:15:16Jehan_onionhammer: Yes.
19:15:23onionhammeriirc i tried with both
19:15:30Jehan_Basically, it tries to stuff a T* in a const T*
19:15:44Jehan_On OS X, gcc = clang.
19:15:50onionhammeri know
19:15:51Jehan_Unless you specifically install it.
19:15:59onionhammerI meant on my cubox
19:16:03onionhammerwhich is debian
19:16:18Jehan_onionhammer: Odd, it works for me with gcc-4.9.
19:16:25onionhammeri'll try again
19:16:40Jehan_On OS X at least.
19:16:56Jehan_Basically, the C++ compiler gets passed the flag -fpermissive
19:17:15Jehan_That allows the const -> non-const assignments for gcc, but not for clang.
19:17:25Jehan_--passC:-Dconst= is the brute force approach.
19:17:42onionhammergcc 4.9.2
19:17:59onionhammerjust double checked, it fails w/ gcc
19:19:03Jehan_onionhammer: Hmm, this is odd. Did you do --passC:-fpermissive explicitly also?
19:19:26Jehan_The crash is something deep in the VM. Not sure what's happening there.
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19:20:58onionhammerneither of those things seem to have any effect
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19:27:53dhertzHi! Does the current HEAD of devel not build Futures correctly?
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19:29:07Jehan_onionhammer: Umm, it works for me. With --passC:-Dconst= it should work at least. What do you get with --parallelbuild:1? Note that this doesn't fix the crash, only the compilation error later.
19:30:34dhertzI cannot even build my program - I get this compile error
19:30:45dhertzlib/system.nim(182, 13) Error: invalid type: 'Future' in this context: 'proc (a: var ref Future:ObjectType){.noSideEffect.}'
19:32:11onionhammerJehan_ both with and without --passC:-Dconst= I get sigsegv
19:32:14onionhammerat the same place
19:32:41Jehan_onionhammer: As I said above, this doesn't fix the crash. It fixes the problem with the C++ compiler not being able to compile the code.
19:32:42onionhammerit never finishes codegen
19:32:55Jehan_Yes, I am talking about the example without `import jester`
19:33:02onionhammeroh sorry
19:33:07onionhammeri'm using my original source
19:33:20onionhammermy mistake
19:35:37onionhammerok, i get the same behavior with that jester hello wolrld program
19:36:00onionhammeri'll switch back to gcc..
19:36:11onionhammeralthough it shouldnt matter
19:36:20onionhammersince it never gets to the c++ compiler
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19:36:46onionhammerno nimcache is even created
19:37:00dom96hello dhertz
19:37:44dom96dhertz: it should work fine, did you edit system.nim?
19:38:32dhertzNope, just pulled down from the head of devel
19:38:40dom96or maybe you could show me the code you are trying to compile?
19:39:00dhertzhttps://github.com/Dhertz/AkaPi/blob/master/main.nim
19:40:20dom96dhertz: that's quite a long file, can you gist all the Nim compiler output you get when compiling?
19:45:56dhertzdom96: https://gist.github.com/Dhertz/1aa0996d13d6a38fabfa
19:47:34Jehan_onionhammer: Yeah, that's a bug in the compiler.
19:47:44Jehan_It breaks in the VM.
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19:49:47dom96dhertz: that's a really strange error
19:51:05dom96dhertz: please report it on github
19:51:36dhertzWhat would you like me to report? Just the error?
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20:18:15dom96hertz: sorry, didn't notice your message. Yeah, the output, and a link to your code.
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22:02:13XeI'm getting an annoying error when trying to do prepared statments with db_postgres: ERROR: bind message supplies 3 parameters, but prepared statement "" requires 0
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22:02:40Xespecified prepared statements like "SELECT * FROM Users WHERE uuid='?' LIMIT 1"
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22:26:19AraqXe: sorry, cannot help you with postgres
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