#crystal-lang on 2015-05-31 — irc logs at freenode.irclog.whitequark.org

2015-05-29 15:42 jhass changed the topic of #crystal-lang to: The Crystal programming language | http://crystal-lang.org | Crystal 0.7.2 | Paste > 3 lines of text to https://gist.github.com | GH: https://github.com/manastech/crystal - Docs: http://crystal-lang.org/docs/ | API: http://crystal-lang.org/api/ | Logs: http://irclog.whitequark.org/crystal-lang

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07:52 <unshadow> >> File.write("/tmp/testing1234.test"); a = File.exist?("/tmp/testing1234.test"); File.delete("/tmp.testing1234.test") if a

07:52 <DeBot> unshadow: Error in line 4: wrong number of arguments for 'File::write' (1 for 2) - http://carc.in/#/r/11q

07:52 <unshadow> >> File.write("/tmp/testing1234.test", "test"); a = File.exist?("/tmp/testing1234.test"); File.delete("/tmp.testing1234.test") if a

07:52 <DeBot> unshadow: Error in line 4: undefined method 'exist?' for File:Class (did you mean 'exists?'?) - http://carc.in/#/r/11r

07:52 <unshadow> >> File.write("/tmp/testing1234.test", "test"); a = File.exists?("/tmp/testing1234.test"); File.delete("/tmp.testing1234.test") if a

07:52 <DeBot> unshadow: Errno: Error deleting file '/tmp.testing1234.test': Read-only file system - more at http://carc.in/#/r/11s

07:53 <unshadow> >> File.write("/tmp/testing1234.test", "test"); a = File.exists?("/tmp/testing1234.test"); File.delete("/tmp/testing1234.test") if a

07:53 <DeBot> unshadow: # => nil - http://carc.in/#/r/11t

07:53 <unshadow> >> path = "/tmp/testing1234.test"; File.write(path, "test"); a = File.exists?(path); File.delete(path) if a

07:53 <DeBot> unshadow: # => nil - http://carc.in/#/r/11u

07:54 <unshadow> hm....

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07:56 <royaso> test

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08:06 <unshadow> Is there a way to patch a lib on-the-fly ? I mean, if I have additions to a certain lib in the stdlibs , can I do something like class Thread < Thread and add what I want ?

08:10 <jhass> unshadow: just open it again, class Thread

08:11 <unshadow> Cool, thanks

08:14 <unshadow> lets say I have something like that: http://carc.in/#/r/122 in my code, where will be good to put it ? as another file ? at the top of main file ?

08:16 <unshadow> what priority are the files loaded ? lets say my first call in my code is for the .alive? , do I need to make sure this part of the code is before ? is require always the first ?

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08:25 <jhass> currently I put it into lib/myproject/core_ext/thread.cr

08:26 <jhass> and require that explicitly before I need it

08:26 <jhass> (at the top of the file that needs it)

08:26 <jhass> pretty sure load order is FS order if you use things like ./*

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10:10 <blAckEn3d> is there any way to make the compiler dump the ast or any other way to expand macros?

10:11 <jhass> crystal hierarchy ?

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10:11 <jhass> there's also https://github.com/manastech/crystal/issues/715

10:12 <jhass> a "good" way to see what code a specific macro generated is to just add a syntax error to it

10:13 <blAckEn3d> crystal hierarchy doesn't seem to dump the methods in classes

10:13 <jhass> yeah

10:13 <jhass> it's more intended for the types of the ivars

10:14 <blAckEn3d> yeah :)

10:14 <jhass> crystal doc should run after macro expansion too

10:14 <blAckEn3d> cool, I'll look into it

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10:40 <blAckEn3d> hm, can anyone help with this: https://gist.github.com/muscar/7588f88e41c132d3cecb

10:40 <blAckEn3d> I get: in /usr/local/Cellar/crystal/0.7.2/src/llvm/builder.cr:19: tried to convert LLVM::Value to LibLLVM::ValueRef invoking to_unsafe, but can't deduce its type

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10:41 <jhass> mmh, you didn't touch LLVM::Value's definition though? or added subclasses or the like?

10:41 <blAckEn3d> nope

10:42 <Codcore> Is there a safe way to make "self.new" method of a class private without redefining it?

10:43 <Codcore> Ihttp://play.crystal-lang.org/#/r/143/

10:43 <Codcore> http://play.crystal-lang.org/#/r/143/

10:44 <jhass> http://play.crystal-lang.org/#/r/14a won't get better I'm afraid

10:44 <jhass> at least for now, might want to open a suggestion for it

10:45 <Codcore> jhass, thanks it fits for me

10:46 <jhass> blAckEn3d: I think you're passing the wrong thing: https://github.com/manastech/crystal/blob/master/src/llvm/value.cr#L7

10:46 <jhass> it expects a ValueRef though

10:47 <blAckEn3d> @jhass I had the same code in a non-visitor method and it worked

10:47 <jhass> mh

10:47 <jhass> okay, ValueRef is Void* so it should accept anything anyway

10:48 <Codcore> it might be a macros for it like's Ruby private_class_method ":mehod_name"

10:48 <jhass> blAckEn3d: what if you pass val.unwrap though?

10:48 <blAckEn3d> if I change the code to: @ctx.builder.ret(LLVM::Int32, 1) it works

10:49 <blAckEn3d> let's see

10:49 <blAckEn3d> Error: you've found a bug in the Crystal compiler. Please open an issue: https://github.com/manastech/crystal/issues

10:49 <blAckEn3d> fun

10:50 <jhass> *shrug*, I'd say hang around until asterite drops by (might be not before tomorrow though)

10:50 <blAckEn3d> thanks :)

10:50 <blAckEn3d> I'll be around

10:53 <unshadow> Why can't Socket.write handle a string ? why should I Slice it to UInt8 ?

10:54 <blAckEn3d> just FIY, this works: @ctx.builder.ret (val.unwrap as LibLLVM::ValueRef)

10:54 <blAckEn3d> must be a bug in the type inferencer

10:55 <jhass> yeah

10:55 <jhass> unshadow: just use <<

10:56 <unshadow> Socket.write << "String" ?

10:56 <unshadow> >> puts << "test"

10:56 <DeBot> unshadow: Error in line 4: undefined method '<<' for Nil - http://carc.in/#/r/14g

10:56 <unshadow> >> puts << "test".to_s

10:56 <DeBot> unshadow: Error in line 4: undefined method '<<' for Nil - http://carc.in/#/r/14h

10:56 <unshadow> Oo

10:57 <unshadow> >> a = << "test"

10:57 <DeBot> unshadow: Syntax error in eval:4: unexpected token: << - http://carc.in/#/r/14i

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10:58 <BlaXpirit> wat

10:58 <unshadow> how do I use the << thingy ?

11:00 <unshadow> Oh, so Socket << "String"

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11:02 <jhass> io << "string", yeah

11:05 <unshadow> jhass: working, thanks :)

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11:33 <Codcore> I've got bug message when trying to call singleton object method - http://play.crystal-lang.org/#/r/14u

11:38 <unshadow> Error: you've found a bug in the Crystal compiler. Please open an issue: https://github.com/manastech/crystal/issues

11:38 <unshadow> :)

11:38 <jhass> https://github.com/manastech/crystal/issues/718 they already did :P

11:38 <Codcore> yeah, by nobody answered

11:39 <jhass> it's sunday, have some patience ;)

11:39 <Codcore> Oh, I forgot it

11:39 <unshadow> XD only jhass is here 24/7 not sleeping not eating.

11:40 <Codcore> He is crzy =)

11:40 <unshadow> Codcore: almost, he is german ;)

11:48 <unshadow> How can I tail (follow) a file using Crystal ? for example, I want to see if something new is added and then do with it something

11:53 <Codcore> unshadow, You need to watching at 'modified' metainformation of file, i think

11:55 <Codcore> here is what are you seeking for https://github.com/manastech/crystal/blob/master/src/file/stat.cr#L129

11:55 <unshadow> I see file has mtime, is that modified time ?

11:55 <Codcore> =) I think it is

11:55 <unshadow> >> system("touch /tmp/testing1234"); File.mtime("/tmp/testing1234")

11:55 <DeBot> unshadow: Error in line 4: undefined method 'mtime' for File:Class - http://carc.in/#/r/14w

11:56 <unshadow> >> system("touch /tmp/testing1234"); File::Stat.mtime("/tmp/testing1234")

11:56 <DeBot> unshadow: Error in line 4: undefined method 'mtime' for File::Stat:Class - http://carc.in/#/r/14x

11:56 <unshadow> >> system("touch /tmp/testing1234"); f = File::Stat.new("/tmp/testing1234"); puts f.mtime

11:56 <DeBot> unshadow: 2015-05-31 11:56:55 UTC - more at http://carc.in/#/r/14y

11:57 <unshadow> >> system("touch /tmp/testing1234"); f = File::Stat.new("/tmp/testing1234"); puts f.blksize

11:57 <DeBot> unshadow: 4096 - more at http://carc.in/#/r/14z

11:59 <unshadow> whats the difference between a Fiber and a Thread ?

12:00 <unshadow> nm, used google

12:09 <unshadow> >> STDOUT << "Testing"

12:09 <DeBot> unshadow: Testing - http://carc.in/#/r/15e

12:13 <unshadow> jhass: What do you say about the Threads v.s Fibers thingy ? don't you think that using Fibers instead of Threads is like getting stuck under Ruby's GIL all over again ?

12:13 <jhass> no

12:14 <jhass> once properly implemented you can stack fibers into threads and even cross thread boundaries

12:15 <unshadow> Oh, so it's lie using multiple MRI's each with it's own set of Fibers

12:15 <unshadow> kind of

12:16 <jhass> mh, no, you don't understand the GVL I think :P

12:16 <unshadow> Wht's GVL ?

12:16 <jhass> well, MRI is a VM since 1.9, not an interpreter, so a nitpick ;P

12:17 <unshadow> Oh...

12:17 <unshadow> Global VM Lock hahah

12:17 <unshadow> ok

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12:18 <unshadow> As far as I know, the GIL (GVL) is an issue where because the VM is using a Single Thread and rubies threads are not real (as in virtual thread) then you cannot do more then 1 concurent execution of ruby code (not incl IO operations which are handeled differently)

12:20 <jhass> nope

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12:20 <jhass> A ruby thread is backed by a real pthread

12:20 <jhass> MRI just ensures that only one thread is active when executing Ruby code

12:21 <jhass> well, basically

12:21 <jhass> http://www.jstorimer.com/blogs/workingwithcode/8085491-nobody-understands-the-gil

12:22 <unshadow> Ok, so this means it's almost like Fibers, the mechanizem is different, but the end result is the same

12:24 <jhass> well, for now, the mid term plan is to have the fibers distributed to a thread pool

12:25 <unshadow> And who controls the thread pool ?

12:25 <unshadow> like, will you have a way to specify maximum Threads ?

12:26 <jhass> I think nobody has an idea yet

12:26 <unshadow> Oh

12:26 <unshadow> so this is a long term goal

12:27 <jhass> well, everybody defines their terms different I guess

12:27 <unshadow> :)

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13:09 <unshadow> jhass: Thanks for the link, it was a good read (all 3 parts) I guess I really didn't understand how the GIL works

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14:47 <vikaton> is Crystal technically corporately backed?

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15:40 <unshadow> Looks like I'm the only one who ever used regex in gets... I was sure this was a regular thingy to do

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18:04 <crystal-gh> [crystal] veelenga opened pull request #719: Corrected build command name in crystal build usage (master...usage_desc_fix) http://git.io/vkodx

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20:45 <BlaXpirit> i made yet another partially working lib generator. yay.

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20:46 <BlaXpirit> well it's actually pretty complete, just gotta add constants and variables

20:54 <jhass> what approach? clang API?

20:59 <BlaXpirit> jhass, Python library that parses C :|

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21:00 <jhass> ah, so the ruby-ffi thingy except in python :P

21:00 <jhass> only perl's left I guess!

21:01 <BlaXpirit> i dont know ruby-ffi, and the thing based on it is definitely incomplete

21:02 <jhass> recently found something nice in glib-2.0, typedef struct GTestCase GTestCase;

21:02 <jhass> wonder what you'd generate for that

21:03 <BlaXpirit> jhass, type GTestCase = Void*

21:03 <jhass> mh, yeah

21:03 <jhass> will have to update crystal-gobject to do that eventually

21:03 <BlaXpirit> and then i remove 1 pointer when it's used :>

21:03 <jhass> well, you can alias to Void too

21:04 <BlaXpirit> hm ok

21:04 <BlaXpirit> now i realized that the lib just uses preprocessor, so it ignores #define constants

21:05 <BlaXpirit> so i'm gonna make some dirty hacks :>

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21:34 <BlaXpirit> i need asterite or waj

21:35 <BlaXpirit> well not really

21:35 <BlaXpirit> it seems like https://github.com/manastech/crystal_lib only shows all #defines

21:37 <BlaXpirit> cpp -dM ftw

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21:54 <BlaXpirit> hmm I would like to make many requests to Crystal asking it "does this compile?"

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