<< 07-12-2016 >>
00:01:27libman(Lions don't actually live in the jungle. Their real habitat is the open savanna.)
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03:08:38Varriount|MobileAraq: Do you know if you'll be at OSCON next year?
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04:18:27Xedoes the nim javascript backend support making HTTP requests?
04:28:25ftsf_Xe, I suspect if you run it in an environment that has those capabilities (eg. a browser) you could use whatever functionality it provides
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05:12:31FromGitter<tekjar> Is there anything such as tagged union in nim?
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06:01:51FromGitter<nigredo-tori> @tekjar, those can be emulated with object variants: http://nim-lang.org/docs/manual.html#types-object-variants . There is also a library that aims to make this pattern a bit more palatable: https://github.com/andreaferretti/patty
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07:12:09FromGitter<tekjar> @nigredo-tori Oh Cool. Thank you :)
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09:03:17vktecHow do I force nimble to install from master when passing it a git URL?
09:04:03vktecThe current release on a package I'm using is broken, but master is (hopefully) not
09:09:18vktecAh, figured it out
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14:16:40FromGitter<nigredo-tori> Is there a good way to find out whether two `NimSym`s refer to the same thing? Specifically, whether they refer to the same generic type (but, possibly, different instantiations). Simply put, I need some expression to make the following work without leaving the macro: ⏎ ⏎ ```code paste, see link``` ⏎ ⏎ I'm aware in this example emitting something along the lines of `x is ySym` would probably work - keep in mind that this
14:16:40FromGitter... is simplified. The real thing recurses on provided NimNode, so emitting checks like this gets inconvenient. Is there a better way? [https://gitter.im/nim-lang/Nim?at=584819c8be9d43bc632d115e]
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14:42:17flyxnigredo-tori: well you can use getTypeInst and compare the generic parameters
14:45:47FromGitter<nigredo-tori> @flyx, I'm trying to do the opposite: compare the top-level type constructors *without* checking type arguments. For example, this should return `true`: ⏎ ⏎ ```same(U[int], U[float])``` [https://gitter.im/nim-lang/Nim?at=5848209ab4ffd59e38f9e45b]
14:47:37flyxokay, then you can use getType and compare that?
15:11:07vktecWhat would be the best way of running a process inside a pty in Nim? forkpty doesn't appear to be supported, so should I hack up some C bindings or is there a library/other technique I can use?
15:21:53flyxvktec: looks like a good addition to posix.nim (or linux.nim ?)
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15:22:19vktecPerhaps a wrapper in osproc?
15:22:29flyxthat would be the next step
15:22:58vktecSure
15:23:31vktecI'll take a peek on GitHub and see if there's an issue about it
15:23:36FromGitter<nigredo-tori> @flyx, seems like `xSym.sameType(ySym)` and `xSym.getType.sameType(ySym.getType)` compare type arguments too, just not in the obvious way: both work for the provided example, but if I add a field, say, `x: A` to `U`, both consider instantiations different. To make things more confusing, `sameType` is not symmetric (for example, for alias types). I have to admit, I don't entirely clear on what each of these does/is supposed to be
15:23:36FromGitter... doing: `getType`,`getTypeInst`,`getTypeImpl`,`sameType`. Documentation could be more clear here.
15:23:49vktecDoesn't seem to be one
15:27:44flyxnigredo-tori: well yeah, the types differ if you use the parameter for a field, obviously. You need to compare it yourself, I don't think you can get sameType to do what you want
15:30:29FromGitter<nigredo-tori> @flyx, yeah, I'm basically writing a simpler `sameType` clone with some custom logic here and there, but it gets ugly if you can't compare symbols without returning from the top macro.
15:31:06flyxwhat do you mean „without returning from the top macro“?
15:31:42FromGitter<nigredo-tori> Without returning from `same` in my example.
15:31:55flyxwhy would you need to return?
15:33:35flyxin your example, sameImpl is doing all the work, you can just call it anywhere within the macro
15:34:14FromGitter<nigredo-tori> Basically, since to check whether `x` is instantiation of `ySym`, I have to generate an AST for the expression `x is ySym`, return it from some macro so it gets evaluated, and only use it after this...
15:35:10FromGitter<nigredo-tori> @flyx, yes, but my example is not working ;) I can't write `sameImpl` like this without some way to compare symbols.
15:37:24flyxI do not really get where the problem lies. you could use typedesc in sameImpl and mark it as {.compileTime.}, afterwards you can directly use it in constant expressions.
15:37:35flyxwhy would you want to do the comparison at runtime?
15:42:04FromGitter<nigredo-tori> @flyx, because I need arbitrary depth comparison. Real `sameImpl` is recursive - and I can't destructure `typedesc` in runtime, hence `NimNode`s.
15:42:34flyxyou also can't handle NimNodes at runtime.
15:42:42FromGitter<nigredo-tori> It's not exactly *runtime* per se - it's macro runtime.
15:42:48flyxwhich is compiletime
15:42:53flyxergo same as typedesc
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15:52:19FromGitter<nigredo-tori> Ok, I'm not expressing myself clear enough. Whether we use `sameImpl` with typedescs directly, or in a `same` macro wrapper is not the problem. The problem is implementing `sameImpl` in any way that allows it to (1) call itself recursively on children of the provided type trees, (2) compare type constructors for equality without taking type arguments into account, and (3) preferably do all this without trampolining.
15:55:51FromGitter<nigredo-tori> I can't see how we can get (1) if we use typedescs for `x` and `y`. This also doesn't solve (2) - we would have to drop down to `NimNode`s anyway, and I don't see a good way to do (2) here (which is the whole point of this discussion for me).
15:59:00flyxwasn't your point that you want not to do recursive calls because you only want to compare the generic types, not the instances?
15:59:29flyxthat would boil down to check whether the symbols for the generic instances are equal
15:59:41flyxI am not 100% sure how to properly do that though
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16:03:33FromGitter<nigredo-tori> @flyx, on the contrary, I *want* to do this recursively - but on each recursion level I need to only compare the topmost type constructor. And yes, that is exactly why I need a way to check symbol equality.
16:05:10flyxwell I cannot wrap my head around it, probably because I don't understand the use-case
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16:09:06cheatfate_flyx, are you here?
16:09:20cheatfate_flyx, just want to ask you about times.nim
16:09:36flyxcheatfate_ I'm on my way to go. but just ask, I can read it later
16:09:48cheatfate_is it possible not to use c runtime library on windows for managing time?
16:11:29flyxsure, if you reimplement it properly. dom96 said it once and I will also say it: the best way to improve the times module is to reimplement it completely.
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16:12:06Araqcheatfate_: windows API ftw :-)
16:12:52flyxbut there are so much funny edge cases that it will take a long time to do that.
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16:15:35cheatfateflyx, i understand that times module is a very tough task. but one of my future plans is to remove msvcrt.dll dependency from nim binary
16:20:59flyxwell. I already dug a bit into it with a PR, I might have motivation to try and do a reimplementation, to see how much work it *really* is
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16:30:13Araqagain, look into FPC's implementation
16:30:23Araqthey use the Win API directly for everything
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16:32:17FromGitter<nigredo-tori> @flyx, here's the use case for you: type matching with wildcards. This is a simplified version of what I'm trying to implement: ⏎ ⏎ ```code paste, see link``` [https://gitter.im/nim-lang/Nim?at=58483991bb7d528222cada3c]
16:33:49FromGitter<nigredo-tori> @Araq, while you're here: is there a good way to check two `NimSym`s for equality? Specifically, two generic type constructors.
16:35:02Araq use == ?
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16:37:49FromGitter<nigredo-tori> I'm not making myself clear again... @Araq, I want to know if they refer to the same thing. `==` doesn't quite do that, sadly.
16:38:06Araqit does for kind == nnkSym
16:38:37Araq of opcEqNimrodNode:
16:38:39Araq decodeBC(rkInt)
16:38:40Araq regs[ra].intVal =
16:38:42Araq ord(exprStructuralEquivalent(regs[rb].node, regs[rc].node,
16:38:43Araq strictSymEquality=true))
16:38:48Araqsee? it uses strictSymEquality
16:48:16FromGitter<nigredo-tori> @Araq, ok, then what am I doing wrong in this example? ⏎ ⏎ ```code paste, see link``` [https://gitter.im/nim-lang/Nim?at=58483d5028d755bf14d7aa27]
16:52:58cheatfateAraq, you so like abbreviations :) what is FPC?
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17:02:39Araqcheatfate: freepascal
17:04:31Araqnigredo-tori: huh... looks like a bug
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17:05:36Araqbbs
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17:44:38Araqnigredo-tori: getType() retuns an AST copy losing the symbolic information :P
17:45:35Araqseems like a PITA to support though
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20:42:41stefantalpalaruIs there any workaround for the cases in which {.borrow.} doesn't work? Related issue: https://github.com/nim-lang/Nim/issues/4121
20:46:27Araqstefantalpalaru: most of these have been fixed, but the workaround is the obvious type conversion body
20:46:39stefantalpalaruOK
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21:26:32stefantalpalaruhow can I call an iterator outside a for loop?
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21:30:24stefantalpalarunevermind, I used a for loop
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23:59:02subsetparkCan anyone provide some pointers on using unittest? I have some old code from .14 that no longer works