<< 19-04-2015 >>
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02:21:48thotypoushi, i'm new to nim, but it looks like this should cause a compile error: http://pastebin.com/PdF3PbGP
02:22:09thotypousshould i report an issue or is it my error?
02:23:01thotypous"compile time evaluation or dead code elimination do not work with methods."
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02:36:57cazovthotypous, looking at the docs I am thinking it's your error. "Perfomance note: Nim does not produce a virtual method table, but generates dispatch trees. This avoids the expensive indirect branch for method calls and enables inlining. However, other optimizations like compile time evaluation or dead code elimination do not work with methods."
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02:38:20thotypouscazov: yes, i mean it's not expected to *work*, but it should be expected for the compiler to output an error message
02:38:40thotypouswhen trying to compile this code
02:38:46cazovohh, I misread.
02:39:37thotypouscazov: what do you think? should i report an issue regarding this?
02:40:01cazovI think so but I am relatively new as well
02:41:11cazov`const` requires the expression be computable at compile time and it's pretty obviously not because those are methods so it looks like there's a bug there
02:41:36thotypousthanks, so i will report it :)
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08:24:14novistis there a reason for unsignedValue <= 123'u32 requiring that 'u32 part? or should i make bug report about literals not being unsigned-friendly?
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08:25:21repaxnovist: example?
08:25:55fowlmouthi think it works better if you import unsigned?
08:26:04repaxUsually there's no way to tell for sure that an unsigned value is intended
08:27:54BlaXpiritnovist, there is huge racial discrimination for unsigned integers
08:28:13BlaXpirityou are not supposed to use them
08:29:28novistright, except when dealing with raw data i would prefer not having some accidents where upper byte flips due to something i did not think of
08:30:23novistas for example, i must do this: codePoint = ((byte1 & 0x0F'u8) << 12'u8) | (byte2 << 6'u8) | byte3
08:30:29novistbyte* are uint8
08:30:59BlaXpirityeah, that's so much "fun"
08:31:02novistalso if codePoint >= 0x0800'u32:, codePoint being uint32
08:31:14BlaXpiritnovist, that one is actually ok
08:31:46BlaXpiritcodePoint >=% 0x0800; codePoint being int32
08:31:56novistsince 0x0800 can easily be uint32 i see no reason why it has to be explicitly specified
08:32:03novistwth >=% even means?
08:32:08BlaXpiritit's stupid as heck but that's what we have
08:32:13fowlmouthhttp://nim-lang.org/system.html#+%,IntMax32,IntMax32
08:32:33novistwow
08:33:10noviston one hand it was gone far enough to abolish <</>>/&/| to have less weird symbols but then we have >=% which are even more magical
08:43:45fowlmouthor you could use unsigned numbers
08:46:17novistor it could just work like one intuitively expects
08:46:26fowlmouthnovist, this can work https://gist.github.com/fowlmouth/54e245c6d519264a448c
08:47:06novistyou cant exactly always implicitly declare variables right when you use them though
08:47:41fowlmouthnovist, you dont understand. importing the module makes i1 <= someliteral work.
08:48:28fowlmouthas it is, that code doesnt compile
08:48:28novistyes, that example was wrong, however bit shifting and/or operations still need literals suffixed with correct type name
08:49:27fowlmouthi1 shr 12 works for me
08:50:11novistvar a: uint8 = 2; echo($(a and 256))
08:50:13novisttry that
08:50:28novistalthough its still wrong, sec
08:50:59novistuhh im having hard time reproducing that part from unicode stuff that didnt work
08:52:32novist.eval import unsigned; var byte1 = 10; var byte2 = 20; var codePoint: uint32 = ((byte1 and 0x1F) shl 6) or byte2
08:52:42novisthmm that no longer work?
08:53:01fowlmoutha and 255 works for me
08:53:40fowlmouththose are ints
08:53:43novistproblem is that a was 1 byte and 256 is two bytes. but in reality i think it still should produce 2 byte result
08:55:17novistgood example is fnv hashing algorithm implementation. it xors or ors lowest octet of hash result with byte from data stream. so uint32 xor uint8. that stuff is kind of needed
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08:59:10fowlmouthit should probably upcast automatically, this works with one type conversion var codePoint: uint32 = ((byte1 and 0x1F).uint32 shl 6) or byte2
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13:00:32BlaXpiritsite down! http://isup.me/nim-lang.org
13:03:38TEttingerBlaXpirit: check nimrod-lang.org, maybe the name reverted while you weren't looking
13:03:43TEttinger:)
13:03:59TEttingerup now
13:04:07BlaXpirityep
13:04:11BlaXpiritjust this second
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15:29:39renesacnovist: it is a bug: https://github.com/Araq/Nim/issues/936
15:30:09renesacacording to the manual, those safe conversios should be automatic
15:30:13renesaclike comparing a uint to 0
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18:39:21AraqError: interpretation requires too many iterations
18:39:25Araq-.-
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21:11:20yomielHey. Learning Nim at the moment. Excuse me if this is a dumb question or if I'm missing something obvious here, but I can't figure out why this code compiles: https://gist.github.com/ianpreston/bddb3084b3dbc30d0e8e
21:12:09yomielRunning that program multiple times yields different values in `vals`, i.e. a data race, afaict
21:13:37Araqhi yomiel interesting example
21:14:07Araqbut how do you know it's a data race when you call randomize?
21:14:45Araqoh wait you only use it for waiting ... hrm
21:16:40Araqwell this code shouldn't compile due to the 'var seq'
21:21:22yomielOk cool, glad I'm not totally misunderstanding the docs... should I file a bug report?
21:23:37Araqsure but I should really get over my pride and make 'parallel' as .experimental :-)
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23:21:10Araqhi Noob_ welcome
23:21:38Noob_Hey why am I getting this error ?
23:21:40Noob_glx.nim(317, 24) Error: expression 'glTexImage2D(0x00000DE1, 0, 0x00001907, 2, 2, 0, 0x00001907, 0x00001401, p)' has no type (or is ambiguous)
23:22:04Noob_This is what the line looks like discard glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, 2, 2, 0, GL_RGB, GL_UNSIGNED_BYTE, p)
23:22:46AraqglTexImage2D doesn't return a value hence there is nothing that can be discarded?
23:23:38Noob_Duh, thanks
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