#crystal-lang on 2015-05-11 — irc logs at freenode.irclog.whitequark.org

2015-05-09 00:24 jhass changed the topic of #crystal-lang to: The Crystal programming language | http://crystal-lang.org | Crystal 0.7.1 | 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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01:06 <vikaton> seems like Crystal has gotten a bit slower in 0.7.1 from 0.6.1

01:07 <vikaton> Idk if its benchmarking luck or not, just saw some milisecond increase

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12:16 <jeromegn> morning

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12:47 <sardaukar> morning :)

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13:53 <vikaton> what's the role of '*' in Crystal with Types?

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14:07 <jeromegn> shortcut for Pointer(Type)

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14:51 <vikaton> o

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15:33 <asterite> vikaton: http://crystal-lang.org/docs/syntax_and_semantics/type_grammar.html ;-)

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15:55 <jeromegn> I wish I had seen that page before

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16:06 <asterite> jeromegn: well, I wrote it 5 minutes ago, so...

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16:09 <jeromegn> haha

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16:37 <jhass> I wonder if having something like https://github.com/tomstuart/monads in stdlib could be useful

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17:02 <vikaton> >> :a = "h"

17:02 <DeBot> vikaton: Syntax error in eval:3: unexpected token: =

17:02 <vikaton> >> :a

17:02 <DeBot> vikaton: :a

17:02 <vikaton> >> a:

17:02 <DeBot> vikaton: Syntax error in eval:3: unexpected token: :

17:02 <vikaton> def add(x: Int32);end;

17:02 <vikaton> >> def add(x: Int32);end;

17:02 <DeBot> vikaton: nil

17:02 <vikaton> oh..

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18:03 <vikaton> I get an invalid pointer error here: https://gist.github.com/Vikaton/fc4b3575e2351b6a3168

18:03 <vikaton> any reasons why?

18:03 <vikaton> *** glibc detected *** /tmp/crystal-run-exec.EL9xHF: free(): invalid pointer: 0x0000000001ec8fc0 ***

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18:08 <vikaton> :(

18:19 <jeromegn> vikaton: not sure, but btw that's already implemented in Crystal. https://github.com/manastech/crystal/blob/ff2b32e2ef2d12eee32286f7c09026027bd11f86/src/gc/null.cr#L26

18:19 <jeromegn> GC.free

18:19 <jeromegn> LibC is a bit everywhere in the project

18:21 <jeromegn> >> x = Pointer(Int32).malloc(10); GC.free(x)

18:21 <DeBot> jeromegn: Error in line 3: no overload matches 'GC::free' with types Pointer(Int32)

18:21 <jeromegn> oops :P not quite!

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19:23 <vikaton> hey sadin

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20:04 <vikaton> Is it possible to somehow include header files in C libs?

20:05 <jhass> no

20:06 <vikaton> aw

20:07 <vikaton> anywho, Though I know I have GC.free, I still want to know why https://gist.github.com/Vikaton/fc4b3575e2351b6a3168 doesnt work

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20:13 <datanoise> i'm sure Pointer#malloc is using LibGC.malloc, and you are trying to free it with LibC. expect some bad things to happen

20:18 <vikaton> hmm

20:18 <willlll> >> Tuple(Int32)

20:18 <DeBot> willlll: collect2: error: ld returned 1 exit status

20:25 <vikaton> datanoise: https://gist.github.com/Vikaton/fc4b3575e2351b6a3168

20:26 <vikaton> Is that right? I compiled it and it works fine though I'm not usre it really is allocating and deallocating

20:26 <vikaton> since malloc is really a void, but I changed it to fit free's need

20:27 <notfowl> They should probably both take Pointer

20:27 <vikaton> notfowl: does it make a difference?

20:29 <notfowl> I guess you're using it for int* and you don't want to cast, you realize this is suited to your purposes alone

20:30 <vikaton> I never thought of casting

20:31 <vikaton> notfowl: I just wanna know if what I have works or not, how can I tell?

20:32 <notfowl> Try x[0] = 10; p x[0]

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20:40 <vikaton> after freeing x @ notfowl ?

20:41 <notfowl> No

20:41 <notfowl> What are you trying to do

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20:42 <vikaton> notfowl: I wanna know if my allocation and deallocation worked in that script

20:46 <notfowl> Check if x is nil?

20:46 <notfowl> Does the pointer class not work for you?

20:49 <vikaton> notfowl: I'm just experimenting

20:50 <vikaton> notfowl: doing 'p x' after C.free outputs: Pointer(Int32)@0x24EA400

20:50 <jhass> why do you want to free manually? the gc does it for you

20:51 <notfowl> It doesn't get set to nil afterwards

20:51 <vikaton> I'm just experimenting, Not using this in any real app

20:51 <notfowl> Search libc free for docs

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20:54 <vikaton> notfowl: hm?

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21:08 <vikaton> notfowl: Yeah it does indeed allocate then dealloc

21:50 <crystal-gh> [crystal] asterite pushed 3 new commits to master: http://git.io/vU0hK

21:50 <crystal-gh> crystal/master 412b4a8 Ary Borenszweig: Fixed #637: Unsupported restriction: Int32 vs. 128

21:50 <crystal-gh> crystal/master b055087 Ary Borenszweig: Fixed: static array restriction where the size was an underscore didn't match

21:50 <crystal-gh> crystal/master 966e9dd Ary Borenszweig: Added `private macro` in top-level: they are local to a file (similar to `private def`)

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