<< 30-01-2016 >>
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00:40:06nchambersAraq_, dots make you a better programmer
00:40:09nchambersobviously
00:40:43Araq_like nails make a better coffin.
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00:47:20TrustableHello guys, I have a problem with a very big array: https://gist.github.com/trustable-code/6f37481086380db9643f
00:47:44TrustableMaybe someone can tell me, why it does Segment fault
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00:50:27Araq_Trustable: stack overflow
00:50:45Araq_very hard for Nim to detect thanks to the C backend
00:51:02Araq_stack size is usually 2MB
00:51:12Araq_and your array is 20MB or something
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00:53:05TrustableHow can I place the variable on the heap?
00:53:26Araq_var x: ref array...
00:53:39Araq_or use a 'seq'
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00:55:58Trustablethx, works :)
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00:56:11Trustable(updated my gist)
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09:10:39dom96Good morning everyone!
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09:19:15gourmorning all!
09:19:17wuehlmausdom96: good morning :)
09:19:26wuehlmausand all :)
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10:03:06shevyI think there is a repository for all nim addons but does anyone remember the URl to it?
10:04:03dom96shevy: you mean all packages? https://github.com/nim-lang/packages
10:04:20Araq_wb shevy
10:04:36shevyah yes thanks
10:04:44shevyhi Araq with an underscore
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10:39:02endragorHow can I interface with a C++ method accepting method pointer? (type and method name that have to be passed are known at compile time). Example of what I'm trying to achieve: https://gist.github.com/endragor/a3b84a13345525e92550
10:40:45Araq_endragor: there is no way except to have a wrapper in the .emit that allows you to use a C function pointer instead
10:41:22Araq_method pointers have no unique binary representation and Nim doesn't know about them either
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10:52:56mat4hello, working on the environment for my compiler project, I stumbled on a special problem. The environment need to be romable and this mean all memory allocation must be static. One array is a buffer for compiled code which should be page aligned (AMD64, NX bit). Exist there a Nim pragma for such cases ?
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10:55:56endragorAraq_: Thanks. But can't I just emit the code in expected C++ form? I tried something like this: {.emit: "`testObj`->methodPtrTest(`objPtr`, & $1::$2);".format(T.name, methodName).}
10:56:14mat4For Posix compatible operating-systems there exist the function posix_memalign which remap memory regions which I can use. However the Posix module don't import this function
10:56:34Araq_mat4: please add it and make a PR
10:56:46endragorthat didn't work, because it seems pointers/refs do not work in backtricks, so "objPtr" was outputted as is.
10:57:12Araq_that depends on your local scope
10:58:01Araq_if you do it in a template, the template needs to be .dirty iirc
10:58:02mat4Araq_: ok, I add it to my to-do list
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11:05:54mat4Araq_: however, independent of possible solution to my problem, data alignement is a requirement for at least most SIMD CPU extensions I know so there should be some language support for it
11:06:26mat4^solution(s)
11:06:48Araq_seqs of floats are aligned so SIMD works on them, but that's a lucky incidence
11:07:05Araq_you can assert alignment at runtime for now though and call it a day
11:07:27Araq_I'm aware of this issue and support for it will only get better
11:08:50endragorAraq_ marking the template as dirty still doesn't work :( I've added things I've tried as a comment to the Gist (https://gist.github.com/endragor/a3b84a13345525e92550). Would greatly appreciate the help.
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11:16:26Araq_endragor: that's bad, maybe I can fix it later for you
11:19:19endragorAraq_: so it is supposed to work? alright, thank you! I'll assume for now that it will be working at a later point :)
11:22:42Araq_it's certainly something worth supporting, you're not the first one to report it
11:23:14Araq_the spec doesn't claim it needs to work, templates don't have to know about backticks in .emit statements ... :P
11:23:34Araq_the .emit statement itself is an implementation specific pragma
11:23:38Araq_bbl
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11:54:53mat4ciao
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12:35:23Araq_endragor: try to concat the .emitted string, so that the template can recognize its parameters
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13:25:31endragorAraq_: what exactly should I concat? btw, for now I ended up implementing a macro that constructs and outputs the required .emit statement
13:26:03Araq_.emit: """code here""" & templateParam & """more code here"""
13:30:21endragorthat makes it try to concat objects themselves, while we need to concat their identifiers
13:36:01Araq_so use astToStr(templateParam)
13:36:21Araq_or name(...) or whatever
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13:57:48SalewskiStatic function variables in Nim? For iterators that is the default. But for ordinary proc? Was not able to find that fast in Manual or with google. For Swift it is similar to C: http://stackoverflow.com/questions/25354882/static-function-variables-in-swift
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14:03:43Araq_it's not the default for iterators either, no idea what you're talking about
14:03:56Araq_a static variable is a .global in Nim.
14:07:56SalewskiThanks -- it is easy to find when one knows that. Maybe we should mention global pragma in manual where variables are discussed. Google is not always that helpful for term "Nim static". Bye.
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14:11:38SalewskiFor iterators, I refered to this statement in manual: "The iterator's local variables and execution state are automatically saved between calls." I was not able to remember global pragma, now problem is solved.
14:11:43SalewskiBye.
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15:25:21dom96http://forum.nim-lang.org/t/1992
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15:52:37gmpreussnerdoes {.noInit.} already work on vars?
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15:52:54gmpreussneri have: var foo {.noInit.}: Foobar
15:53:06gmpreussnergetting Warning: Cannot prove that 'foo' is initialized. This will become a compile time error in the future. [ProveInit]
15:53:27gmpreussnerwhen passing foo to a proc that will initialize it
15:54:04gmpreussneri guess the warning is on the proc call, not the var
15:55:08gmpreussneri'm passing addr(foo) to the proc. is there a way to do this? Foobar is an object containing sub-objects. it's for an API wrapper, so i have little choice in chaning the proc
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16:00:01Araq_gmpreussner: the problem is that 'var T' means reads/writes
16:00:20Araq_we need 'out T' to fix this which would mean "must write before read"
16:01:25gmpreussnerah yes, that makes sense
16:03:14gmpreussnerAraq_: what would be the workaround for now? constructing the object will get very noisy, because of the sub-objects that need to be initialized, too
16:04:12Araq_don't use types that inject .requiresInit
16:04:26Araq_that would be range[1..100] for example
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16:05:56gmpreussnerhmm... what about enums?
16:06:12gmpreussnereverything else just boils down to ints and uints
16:08:06gmpreussneryeah, initializing the enum values worked. thanks!
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16:25:22sparrkHow does one pass a count table by reference instead of making a copy? See: https://gist.github.com/anonymous/2cc615c1814e1c6c4e22
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16:25:40sparrkI would expect that to have the value of 2 for penalty
16:26:00Araq_use CountTableRef ?
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16:27:04sparrkAhh, thanks
16:27:07sparrkMissed that
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17:06:28pigmejdom96: I just bought your book :)
17:06:43dom96pigmej: yay, thank you!
17:08:10dom96pigmej: Let me know what you think as you read it, or if you have any questions :)
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17:14:30pigmejdom96: yeah I will
17:14:40pigmeji will need time to read it first :D
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17:33:04nchamberswait dom96 wrote a book?
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17:36:16dom96nchambers: http://nim-lang.org/news.html#Z2016-01-27-nim-in-action-is-now-available
17:36:28nchambersI need to be on that forum more
17:37:03nchamberswhat is the book about irt the nim language?
17:44:31pigmejdom96: in speed comparsion you should probably note that it was compared to CPython
17:49:57dom96pigmej: good point, will do. Thanks.
17:51:07dom96nchambers: The book teaches how to program in Nim.
17:51:14nchambersah
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18:38:56gmpreussnerdom96: i renamed all my packages. no conflicts. hooray :)
18:39:23dom96gmpreussner: awesome, thank you!
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19:08:23jsudlowHi @ll, https://gist.github.com/jsudlow/08004cc517bb78e00276 when I create a basic person type I can instantiate the object and everything works fine. However If I want to import the file that contains the type like this https://gist.github.com/jsudlow/cccbe62623940b2605ce
19:09:35jsudlowI get an undeclared identifer, is there a proper way in nim to utilize imported procs and types succesfully?
19:12:45jsudlowoh i'm sorry guys I figured it out
19:12:50jsudlowyou have to use an *
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19:28:16gmpreussnerjsudlow: type Person* = object
19:28:24gmpreussnerthe '*' will export the symbol
19:28:38gmpreussnersimilarly: proc greet*(p: Person)
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19:34:17jsudlowthanks gmpresussner! I'm starting to get something cooking over here now
19:36:28shevysupper!
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19:53:23gmpreussnerAraq_: generic templates aren't supported yet, right?
19:55:50gmpreussneri'm getting compile errors when not explicitly specifying the template parameter, and a '(Attempt to read from nil?)' when specifying it
19:56:20gmpreussnerSIGSEGV: Illegal storage access in the compiler that is
20:01:06def-gmpreussner: works for me with a simple example
20:08:04gmpreussnerdef-: i guess my case is not super simple
20:08:11gmpreussneri don't have a minimal repro right now, but try this: https://gist.github.com/gmpreussner/d0432e5891a5ce58d0bc
20:09:55def-yeah, looks like a bug
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22:02:14Araq_gmpreussner: already fixed it
22:02:30gmpreussneryay, thanks :)
22:02:36Araq_as I keep saying, don't waste your time producing minimal tests, I barely looked at your code
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