<< 23-09-2015 >>
00:01:14Araqgeography? ok, how about this: http://www.iflscience.com/environment/africas-size-perspective
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00:05:32softinio@dom96 @ekarlso How far along is nim-playpen ?
00:06:05ekarlsosoftinio: except what's been noted ^ it works..
00:09:44softinio@ekarlso I missed what was noted :-)
00:09:54ekarlsosoftinio: read up )
00:10:59softinioissues on github or earlier here ?
00:11:31ekarlsosoftinio: it crashes atm (the server componennt) with concurrency
00:11:44softiniook
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02:39:11tmm1i'm hitting this issue on mac osx 10.11 (el capitan) with openssl 1.0.2d_1 installed via homebrew: https://github.com/nim-lang/nimble/issues/142
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03:06:12tmm1is there a compile time way to see if a symbol is defined in a dylib
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05:00:13ryu0tmm1: manually or automatically?
05:00:45ryu0tmm1: there's always the manual way of examining the ELF data of the shared library.
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05:05:58tmm1i'm on a mac, but nm would show it in either case. i'm more wondering if the nim compiler has a way to do it for ffi purposes
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05:43:01tmm1nimsuggest vs nim idetools --suggest, is one better than the other?
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06:34:45gokrtmm1: Ehm, I may be wrong, but isnt nimsuggest the "new" idetools?
06:34:53gokrAraq knows
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06:56:14tmm1ok i wasn't sure which one was newer
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08:45:34coffeepotHey nimsters, just curious: why does Nim require a compiler flag to enable thread support? Is this to keep the exe lean (I thought Nim excluded stuff that wasn't used)?
08:47:09coffeepotor does threads: on change how the GC operates?
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09:19:42Araqcoffeepot: it mostly means that .thread vars are mapped to thread vars
09:19:56Araqwith --threads:off they are just global variables
09:20:20Araqand yeah, the GC also does some special things then, but I don't remember the details
09:21:15coffeepotok thanks Araq :)
09:32:42tymatosproc.kill(p: Process) doesn't seem to work on OS X
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09:43:34dom96tymat: bug report please
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09:51:37dom96Araq: Think it might be a good idea to warn people when they begin the names of their procs/methods with an uppercase letter?
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10:55:40veganskCan somebody point me, where is the rope for the symbol generated in c/c++ codegen?
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10:57:32softinio@dom96 what happens when proc names have uppercase first letter
10:58:02dom96softinio: nothing, but convention is for types to have uppercase first letter
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12:05:42softiniosomething I am bit confused about
12:07:14softinioIf my proc returns an object ref, will the object continue to exist after the proc finishes as long as I assign it to a var ?
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12:32:53gokrsoftinio: For refs its all about holding onto it. As long as you do so, somewhere, its not garbage collected.
12:33:32softinio@gokr Got it. Thats quite pleasant compared to C :-)
12:33:41softinioTHX
12:33:50softiniomeant thx
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13:05:14softinioam I able to append two strtabs together using & or no ? Maybe I need to create & ?
13:05:50dom96You need to create that.
13:05:57dom96Would be nice to have in the stdlib so make a PR
13:06:06softiniook got it thanks
13:06:22softinioGood Idea will make a PR, my first contribution to nim yay
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13:08:23softinio@dom96 btw I love nim very impressed. Want to contribute to nim as much as possible. Will exclusively use nim from now on on all projects outside of work (which I have no choice over) going forward and advocate for it @Araq so count me in for anything I can help with
13:09:37softiniomeant at work I have no choice what tech I use, but everything I have the choice I will use nim :-)
13:10:19softiniosuper excited
13:12:28async_princehello
13:12:33async_princei'm new to nim
13:12:42async_princebut what the plans about 1.0?
13:28:05tymatare there examples on how to setup a project with multiple .nim source files?
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13:32:38dom96softinio: awesome :D
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13:34:15dom96async_prince: We're trying to get it out asap, but resources are limited and the speed of development is not as fast as we would like.
13:34:22dom96async_prince: Good news is that you can help :)
13:35:00ryu0-crickets-
13:35:01ryu0=p
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13:38:17dom96ryu0: hrm?
13:38:45dom96tymat: I think http://howistart.org/posts/nim/1 might have something
13:39:09dom96tymat: but i'm curious what you would like to know? The directory layout or something else?
13:44:05gokrasync_prince: One thing though, IMHO the version number of Nim shouldn't be discouraging. I have managed to reach perhaps 3000 loc on my own and we use it in our product etc, and ... well, IMHO when stuff compiles it *works*.
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13:52:51softinio@tymat why don't you look at nim projects on github? https://github.com/trending?l=nimrod
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13:53:10softinioahhh github still knoes nim as nimrod
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14:17:24dom96softinio: yeah, github can't change it because of some issue
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14:26:26coffeepotI'm having a problem using createThread. I'm getting this error message https://gist.github.com/coffeepots/9484fb3204971fa1ea46
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14:26:52coffeepotIs this telling me that this will only compile if my thread is GC safe and doesn't use locks?
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14:28:00coffeepotI'm using {.guard.} and {.locks.} for this thread, and I don't know how this would work with threads otherwise
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14:28:51dom96coffeepot: can you gist your code?
14:28:57coffeepotsure just a sec
14:29:57coffeepothttps://gist.github.com/coffeepots/8b8c23332eae6a75005f
14:30:12coffeepotjust wanted to try out a threaded logging module
14:31:19dom96you need to mark your thread with the {.thread.} pragma
14:31:23coffeepotI might have got something wrong, my first real attempt at threading. I just got worried when I saw that the compiler *seems* to expect the thread to be gc safe - though perhaps I just misunderstand what gc safe means in this context?
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14:32:09coffeepotdom96: where's that, on line 28 at the def of loggerThread?
14:32:33dom96loggerWriteThread
14:33:14coffeepotah right! now it says it's not GC safe, which is fair
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14:34:36coffeepotok thanks dom96, I guess I need to refactor this a bit to not use globals
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14:35:06dom96yeah
14:35:30coffeepot:) silly me!
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14:40:15tymatI'm trying to find how to setup an AF_UNIX (socket IPC) connection but I don't see it in http://nim-lang.org/docs/net.html or http://nim-lang.org/docs/rawsockets.html
14:43:14def-tymat: i see AF_UNIX in rawsockets
14:45:48tymatyes, the enum for Domain exists but no way to pass a socket file
14:48:30def-might have to use the posix module or add functionality to rawsockets that does that
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14:51:56tymatseems like that's the case
14:54:26coffeepotWhat's the work around for this: "withLock( logger.lock ):" -> Error: identifier expected, but found 'logger.lock'
14:55:06coffeepotI can't use a var 'alias' because IIRC that will copy, and the log needs to be modified. Can't use let for obvious reasons.
14:56:32coffeepotis this a catch with template parameters? How do I pass <object>.<variable> in this case?
14:57:46coffeepotthe template is defined as "template withLock(lock: var Lock, actions: stmt): stmt {.immediate.} ="
15:04:16dom96tymat: This PR implements them: https://github.com/nim-lang/Nim/pull/3326
15:04:31dom96Would be cool if you could polish that PR.
15:04:42rogercloudcoffeepot: a pointer?
15:05:34coffeepotcheers rogercloud, yeah I guess so. I was trying to avoid them but I suppose with multithreading there's no other way. Kinda surprised by the template param thing though
15:06:00dom96what is logger.lock?
15:06:03dom96where is it defined?
15:06:34coffeepotit's passed to the thread as the argument
15:07:26coffeepotit's of type Logger and contains lock: Lock; filename: string; and queue: Queue[LogData]
15:08:18rogercloudthe same as the pass channel to thread problem, a pointer is always a walk-around in this scenario
15:08:42coffeepotto be honest, I think I need to rethink this whole exercise. I was hoping to just chuck something out quickly but threading isn't straightforward here
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15:13:33rogercloudrelated to coffeepot's question, what's the shortcoming when using pointer instead of var parameter?
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15:26:20Araqcoffeepot: try template withLock(L, actions) = ...
15:28:13coffeepotAraq: Cheers, that worked :D
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15:50:57federico3dom96: the forum is down
15:51:56dom96shit. Fixed
15:52:15coffeepotwow that was quick!
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15:54:42dom96well, I restarted it
15:54:46dom96Haven't fixed the root cause yet
15:55:54coffeepotfwiw, I got the threading logger running https://gist.github.com/coffeepots/04f049e24066de0be09f
15:56:06coffeepotthanks everyone for the help :)
15:56:34coffeepotprobably gonna expand it out so it's useful and pop it on github
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16:01:03coffeepotI note that it's not really doing what it should be (only logs one msg per cycle lol) but hey, it runs!
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19:03:20Araqdom96: does your async macro do anything with nnkBracketExpr?
19:03:43dom96Araq: Probably. What is nnkBracketExpr?
19:03:58Araqa[i] # array access
19:04:25Araqbut of course it can also be HashSet[T]
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19:05:53Araq # Verify that the return type is a Future[T]
19:05:55Araq-.-
19:06:28dom96yep
19:06:35Araqwhat the fuck?
19:06:36dom96I use it a lot it looks like.
19:06:50Araq if returnType.kind == nnkIdent:
19:06:51Araq error("Expected return type of 'Future' got '" & $returnType & "'")
19:06:53Araq elif returnType.kind == nnkBracketExpr:
19:07:08Araqso if it's any kind of ident it's not "Future"?
19:07:22dom96?
19:07:28Araqand if it's not a bracketexpr, you don't check anything?
19:07:37Araqtype Foo = Future[string]
19:07:41dom96That makes sure the proc's return type if a Future[T]
19:07:42dom96*is
19:07:50Araqproc p(): Foo {.async.}
19:07:55Araq# fails?!
19:07:57dom96yes
19:08:21Araqwell it's wrong
19:08:31dom96Sure, but it's not a big deal.
19:08:49dom96Now we can use the type API to check this I guess?
19:08:55Araqyou need at least an 'else' for kind == bracketexpr
19:09:25Araqotherwise it's just some arbitrary logic ...
19:10:11Araqoh well, let me fix it
19:10:39dom96Don't get why you're getting so worked up over it?
19:10:45dom96it's simple to fix
19:11:06Araqit's bug #3356
19:11:27Araqand it annoys me cause I like to do something else
19:12:44dom96why did it suddenly start failing for dhertz?
19:13:26dom96if the fix is that simple then I can do it, but the error seems very cryptic
19:14:16Araqdon't worry, I'm fixing it
19:14:22Araqthe AST changed
19:14:37Araqa[i] is rewritten to `[]`(a, i) in templates
19:14:52Araqcausing your async macro to not detect the return type properly
19:17:02Araq if prc[0].getName == "hubConnectionLoop":
19:17:03Araq echo(toStrLit(result)) # debug leftover?
19:17:17dom96yes
19:17:26dom96you can comment it out
19:17:27Araqremove or comment out?
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19:19:20Araqso ... what should the macro do with 'type(int)' for example?
19:19:35Araqproc foo(): type(int) {.async.}
19:19:42Araqerror?
19:19:51Araq error("Expected return type of 'Future' got '" & $returnType & "'")
19:21:33dom96yes
19:21:44dom96Future needs to be explicit
19:22:02dom96you don't need Future[void] though
19:22:11dom96so no type means Future[void]
19:22:53reactormonkdom96, Future[void] may be relevant when you're waiting for a side effect?
19:23:00Araqis it too late to make macros.`$` sane?
19:23:21dom96reactormonk: what do you mean?
19:23:27dom96You can have Future[void]
19:23:57dom96Araq: what's insane about it?
19:24:18Araqit's fragile and stupid
19:24:36Araqinstead of turning the AST into a string it only works on identifier-like ASTs
19:25:07dom96then perhaps it should be renamed
19:25:50dom96I would rather get an error than get some strange string in my macro
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19:27:16Araqwell yeah
19:27:25AraqI'm deprecating it for now
19:27:33Araqnew name: identAsStr
19:29:44dom96I think getIdentStr would be better
19:30:13Araqer ... we don't have a good $ for NimNode at all?
19:30:25dom96I think `$` is new enough not to have been in a release
19:30:34dom96hrm, or maybe not
19:30:38Araqno, it's old.
19:32:43Araqah I mapped 'repr' to Nim's pretty printer. smart...
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19:33:05Araqwho knows that repr is overloaded for NimNode to mean something else?
19:38:40Araqyay. Fixed it.
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19:50:29NimBotnim-lang/Nim devel 90d1ad4 Araq [+0 ±3 -0]: made disjoint checker smarter; fixes regressions
19:50:29NimBotnim-lang/Nim devel f937637 Araq [+1 ±1 -0]: fixes #3357
19:50:29NimBotnim-lang/Nim devel 000c413 Araq [+1 ±2 -0]: disjoint checker is smarter (and slower)
19:50:29NimBotnim-lang/Nim devel ec357a3 Araq [+0 ±0 -1]: deleted graphics module; it's a Nimble package now
19:50:29NimBot1 more commits.
20:11:15dom96Araq: nice
20:12:41Araqfortunately I knew where to look ;-)
20:12:57Araqcould have been a hard bug
20:13:38reactormonkheadshot?
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20:19:07NimBotnim-lang/Nim devel 6fa01e3 Nycto [+0 ±1 -0]: Extend option functionality
20:19:07NimBotnim-lang/Nim devel 0906bf5 Dominik Picheta [+0 ±1 -0]: Merge pull request #3321 from Nycto/devel... 2 more lines
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20:27:48dom96So yeah, we have a gitter chat room now too https://gitter.im/nim-lang/Nim
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20:50:01NimBotnim-lang/Nim devel 2210060 Araq [+0 ±2 -0]: fixes #3359
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21:00:54indiagreenI have a huge global array and a function that reads from that array (but doesn't write into any global variable) and produces a value. I want to run this function several times in parallel, so I'm trying to use spawn, but I'm told “Warning: 'score' is not GC-safe as it accesses 'user_reached' which is a global using GC'ed memory”. What can I do about it?
21:01:58Araqindiagreen: depends on your problem
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21:05:54Araqindiagreen: you can cast your proc to a proc (<signature_here) {.nimcall, gcsafe.} to make the compiler shut up
21:06:22indiagreenwould it cause subtle and devious bugs?
21:07:01indiagreenI don't like circumventing restrictions when I've no idea whatsoever what the consequences could be
21:07:09Araqreadonly doesn't mean it's safe.
21:07:28Araqotherwise the compiler would only check for write accesses to globals
21:08:50Araqif you use something like let someStr = global[i] it's safe due to the copying semantics of strings.
21:09:13Araqif you read a 'ref' however, it's pretty much unsafe.
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21:11:53indiagreenokay, so int would be safe as well? (I mean, the array is seq[int] and so the accessed value is an int and if strings are copied then I'd expect ints to be copied as well)
21:12:18Araqyeah, that's perfectly fine
21:13:03Araqin fact, it's something the compiler could allow out of the box
21:14:18indiagreenthanks! Is there some place where I could read about the no heap sharing restriction (if this is the culprit here) in greater detail? I only found 1 sentence about it in the manual (“it is invalid to construct a data structure that consists of memory allocated from different (thread local) heaps”) and it wasn't enlightening to me, probably because I haven't used concurrency that much before
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21:15:53Araqwell it used to be worse. Now the compiler's checking is sound. (Some warning need to become errors though.)
21:16:31Araqso if the compiler doesn't complain (and you do not use unsafe constructs), it's fine.
21:17:08Araqsorry, the docs are still sparse.
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21:27:46indiagreenAraq: {.nimcall, gcsafe.} didn't make it shut up :(
21:28:31indiagreensame warning (well, okay, an error already but the same error message)
21:29:37indiagreenhm, wait, no
21:29:38indiagreen“cast”
21:29:50Araqyup
21:29:55indiagreenand I just added an annotation to the original proc
21:30:03Araqyeah I figured
21:30:21indiagreenokay, right, sorry for not reading carefully
21:30:44NimBotnim-lang/Nim devel 10a4bb6 Araq [+0 ±1 -0]: fixes 3354
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