<< 27-08-2016 >>
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11:29:34NimBotnim-lang/Nim devel ff3cf00 Andreas Rumpf [+0 ±1 -0]: fixes #4656; ropes.nim checks properly for file equality
11:29:34NimBotnim-lang/Nim devel 7e643d7 Andreas Rumpf [+0 ±1 -0]: koch nsis: don't hardcode the path to NSIS
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11:32:41federico3is any of you guys in Seattle?
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12:43:18euantorNope, why?
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18:12:24newb254354Hey guys. I'm playing with some exmaples from the documentation, more specifically from http://nim-lang.org/docs/backends.html and the section "Nim invocation example from C". I'm stuck when trying to compile my resulting c files with gcc (using the example syntax). More specifically, the error message is as follows:
18:12:40newb254354nimcache\stdlib_system.c: In function 'sysfatal_91221_1689653243': nimcache\stdlib_system.c:11333:1: warning: 'noreturn' function does return
18:15:57newb254354Now, i'm thinking this guide might be out of date. Or my setup is to blame. Running the latest nim (0.14.2 (2016-06-09) [Windows: amd64]) and using TDM-GCC (gcc version 5.1.0 (tdm64-1)). Any hints on what I might be doing wrong?
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18:25:32yglukhovAraq: mind having a look at my prs please?
18:27:05newb254354Never mind guys. It was only a compiler warning, so i guess it doesn't matter... :P
18:27:40dom96newb254354: ahh cool, was about to investigate :)
18:28:57yglukhovvegansk: ping
18:29:17yglukhovdom96: please, merge my pr with jsons
18:29:23NimBotnim-lang/Nim devel dddae2d Yuriy Glukhov [+0 ±1 -0]: Fixed frame corruption
18:29:23NimBotnim-lang/Nim devel 06ab03b Dominik Picheta [+0 ±1 -0]: Merge pull request #4662 from yglukhov/json-frame-corruption... 2 more lines
18:29:25dom96yglukhov: just did
18:29:35yglukhovcool. thanks!
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18:30:12newb254354dom96: thanks anyway! :) i'm so used to ANY output other than success meaning something is broken so it was a knee jerk reaction to assume the compilation didn't succeed.
18:30:52dom96newb254354: I think warnings like that are worth investigating anyway, maybe you could open an issue on github for it?
18:32:11newb254354dom96: Yeah, you're probably right about that. I'll go ahead and do so.
18:34:23dom96thanks!
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18:42:24krux02is there an operator that works like dynamic_cast in c++?
18:42:41krux02cast is more like a reinterpret_cast
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18:49:04def-krux02: type()
18:49:32krux02isn't type supposed to give me the type of an experssion?
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18:53:14krux02def-: do you mean this `type(value) is MyType: ... else: 0`
18:53:57krux02I could not find anything saying it would check for the dynamic type
18:55:14def-krux02: nono, just int(10.2)
18:55:29def-where type = int
18:56:10krux02I need this for inheritage
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18:56:47krux02I have a base class and subtypes and I need to check weather weather I have a subtype or not
18:59:56yglukhovkrux02: if myVarThatIsSuperType of MySubType: let mySubtypedVar = MySubType(myVarThatIsSuperType)
19:00:08yglukhovor just convert and catch a conversion error
19:00:09yglukhov=)
19:00:35krux02yglukhov: thanks, that sounds promising
19:01:08krux02this is one thing where I prefer the c++ syntax
19:02:06AraqC++ also supports T(x) syntax :P
19:02:22yglukhovkrux02: template dynamic_cast(T: typedesc, v: typed): T = if v of T: T(v) else: nil
19:02:26krux02if(auto mySubtypeVar = dynamic_cast<MySubType*>(myVarThatIsSuperType)) { ... }
19:02:37yglukhovone liner
19:03:00krux02but can I use it in an if expression like in c++?
19:03:13krux02I don't think so
19:03:31Araqsure you can
19:03:49Araqif (let x = ...; x != nil):
19:04:08krux02thanks a lot
19:04:53yglukhovAraq: tbh, i think it could be a nice sugar. if let myVar = foo():
19:05:03yglukhovand could easily be implemented i guess
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19:05:29yglukhovswift does it
19:05:30yglukhov=)
19:05:48krux02rust has it in the documentation, too.
19:06:05yglukhovwell yeah, its handy
19:06:36krux02but in c++ it's pretty unknown
19:07:07Araqdunno how these languages keep the type safety of 'bool'
19:07:33Araqavoiding the () is one thing, auto conversion to a bool context another
19:07:44yglukhovAraq: indeed. maybe we should reconsider this after default not nil is implemented to see how it goes
19:07:48krux02in c++ there is an automatic conversion from any pointer type to bool type, and in rust it is an excption for the if statement
19:08:29yglukhovkrux02: that is a feature from only one perspective. a bug from another.
19:08:29AraqI know what C++ does. I asked about Swift and Rust
19:08:43euantorWhat is it we're discussing?
19:08:49euantorType conversion/casting?
19:09:08krux02I never programmed in rust, but I saw that they documented it
19:09:15yglukhovAraq: can you review my pr please?
19:09:17krux02but they need an optional type for it
19:09:18euantorIIRC, Rust will return an Option<T>, so the actual boolean condition is checking if i is Some (true) or Nonw (false)
19:09:23Araqconverter toBool[T](x: ref T): bool = x != nil
19:09:37euantor*None
19:10:09krux02Araq: will the convertey appy to a let statement?
19:10:40Araqdoes a let statement yield x's type?
19:10:49Araqno, it yields void :P
19:11:14yglukhovkrux02: you could easily write a template that allows the following: if llet myObj = foo(): ...
19:11:20yglukhovllet would do the magic =)
19:11:43AraqI don't think this will work
19:11:54Araqbecause of the colon
19:12:08Araqbut somebody needs to try it :-)
19:13:04Araqwhat's there to review? dom96 merged it?
19:14:27krux02I just tried the converter, but let expressions in nim do not have a type (and I think this is good)
19:14:49dom96Araq: he's got multiple PRs
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19:18:30Araqkrux02: converter plus yglukhov's template should get you somewhere
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19:19:24kang00Have you used any Web api on Web based ide or compiler?
19:19:59krux02I am currently writing a macro ``myif``, but I fail to pass a let expression to it
19:20:16krux02myif(let p = maybe()):
19:20:20krux02won't parse
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19:24:05yglukhovAraq, krux02: interesting. it looks like `=` can not be used inside an ast tree passed to a macro...
19:25:23krux02yglukhov, it can, but not the way you tried it or want it
19:25:49dom96hello kang00, not entirely sure what you mean
19:25:53krux02the last argement to a macro can be an arbitrary block and there you can have as many let's as you want
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19:26:51NimBotnim-lang/Nim devel 8fca040 Araq [+0 ±5 -0]: some attempts to make symbolfiles work again
19:26:51NimBotnim-lang/Nim devel a13cb26 Araq [+0 ±11 -0]: next steps in getting symbol files to work again
19:26:51NimBotnim-lang/Nim devel 7630cd0 Araq [+0 ±1 -0]: updated test case
19:26:51NimBotnim-lang/Nim devel 68e30d7 Araq [+0 ±6 -0]: tester cleanup; enable some rod tests
19:26:51NimBot2 more commits.
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19:27:14AraqNimBot is in da house :-)
19:27:47dom96yeah, until nimbuild crashes again :P
19:27:57newb254354dom96: FYI i filed an issue about it here: https://github.com/nim-lang/Nim/issues/4664
19:28:18dom96newb254354: thanks
19:28:36newb254354dom96: np
19:28:46krux02this works now:
19:28:49krux02myif((let pi = maybe();)):
19:28:49krux02 echo pi[]
19:29:33Araqnewb254354: will close it soon :P we don't care about C warnings
19:30:04kang00dom96 I want to know how to use Web Api?
19:30:36dom96Araq: why not?
19:31:07dom96kang00: what do you want to write? A web app?
19:31:18Araqthey never told me anything important
19:32:16Araqnewb254354: did you touch the config? cause we just disable warnings
19:32:26kang00Nope; I am not coder; I just want to see web Api in action. I don't have machine.
19:32:30kang00http://www.programmableweb.com
19:32:37kang00dom96
19:32:50kang00I am referring this site for Web api
19:32:55kang00How to read or interpret such api
19:33:03kang00Can you help me?
19:33:16kang00I understand each Api has many libraries
19:33:26kang00Each library many modules
19:33:32kang00Is it correct?
19:34:05newb254354Araq: Allright. I wasn't sure about your stance with compiler warnings so i figured it might be an issue. No i didn't touch any config. I'm not completely sure exactly what config you're reffering to though
19:34:12kang00How to download api from that url?
19:34:28dom96kang00: is this at all related to the Nim programming language?
19:34:35Araqnewb254354: the nim.cfg that ships with your Nim compiler
19:34:48kang00Nope can you help me in pm? dom96
19:35:04newb254354Araq: If so, no i haven't touched it.
19:35:07dom96kang00: ask in ##programming
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19:35:20Araqnewb254354: I guess this means it's valid bug report then ;-)
19:35:23kang00I tried yesterday
19:35:46dom96kang00: I can't help, sorry.
19:35:56kang00Ok
19:36:54newb254354Araq: Allright, i'll clarify that in the bug report. Thanks.
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19:51:39Araqyglukhov: are you sure your jssys.nim changes don't affect PHP?
19:52:29yglukhovAraq: i tried to not break PHP, but not 100% sure.
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21:21:56krux02yay I wrote a macro that did what I wanted :D
21:22:06krux02macro ifof(sym: typed, t : typedesc, blk: untyped): stmt =
21:22:06krux02 let ident = newIdentNode($sym.symbol)
21:22:06krux02 result = quote do:
21:22:06krux02 if (let `ident` = cast[`t`](`sym`); `sym` of `t`):
21:22:06krux02 `blk`
21:22:30krux02the usage:
21:22:31krux02ifof(x, ptr MyObject):
21:22:31krux02 echo x.banone
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21:37:15krux02ok not that great because it doesn't work with else or elif, but I made an update
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23:45:27NimBotnim-lang/Nim devel 7aa6494 Araq [+0 ±1 -0]: disable rodfile tests depending on gtk