<< 10-07-2016 >>
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02:05:24mccHey so, I am trying to use the js backend, I am a little confused about how to interact with js. I see I can make a function with importc, but what about objects?
02:10:04reactormonksame. see dom.nim
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03:15:09mccok. and there's no way for nim code to interact with an untyped js object, i assume?
03:17:18mcchere is a question. has anyone ever looked into importing Typescript or Flow type signatures into nim?
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09:17:40cheatfateVarriount, yeah problems disappeared for some reason... and now "spaces and indents" automatically set when i'm saving file as nim, perfect, thank you
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09:56:27Araqoh my, how did we survive without 'importcpp' for the JS target?
10:30:36VarriountAraq: Probably because the JS target isn't used too much.
10:31:06VarriountAraq: Although, come to think of it, a WebAssembly backend might be the perfect fit for Nim.
10:32:31VarriountAraq: By the way, you might find this useful: http://www.muppetlabs.com/~breadbox/software/cppp.html
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12:05:37AraqVarriount: seems useful as a preprocessing step for c2nim
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12:27:08pdvWhile I was investigating why pegs doesn't play nice with JS backend (https://github.com/nim-lang/Nim/issues/4247), I have found this bug: https://github.com/nim-lang/Nim/issues/4470 . I'm not sure how fast it would be fixed. However, I can make pegs work by changing it to use string internally. Seems like the only reason it uses cstring in the first place was for performance reasons. What is the best course of action?
12:27:08pdv1. Switch to string (add {.push boundChecks:off} to preserve performance).
12:27:09pdv2. Use cstring in standalone and string everywhere else (add a type alias)
12:27:10pdv3. Do nothing and wait for #4470 to get fixed.
12:40:35Araqhey pdv!
12:40:52Araq#4470 seems like it may break quite some code -.-
12:41:22Araqyou can switch to 'string' in a 'when defined(js)' environment to fix it
12:41:35Araqand I guess that's the best solution for now.
12:42:16Araqfixing #4470 needs a deprecation path and somebody should write down what is and is not allowed with JS's cstrings ....
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12:51:31cheatfatedom96, this check is useless https://github.com/nim-lang/Nim/blob/devel/lib/pure/asynchttpserver.nim#L157
12:52:34cheatfatebecause header line with name "AAAA ...(many many million times)" will DoS it anyway...
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12:53:34cheatfatesame problem exists with first request line...
12:54:35pdvAraq, about 'when defined(js)' - isn't it better to use one type accross all targets? This would go a long way towards making sure that pegs work consistently across targets in the future (no platform-specific data types). To preserve performance, I could add a distinct wrapper around string with `[]` reimplemented to skip bound checks...
12:55:12Araqthe bound checks are gone with -d:release anyway
12:55:23AraqI wouldn't bother about them.
12:57:52pdvOK, then I'll switch it to string. Thank you.
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13:19:11ndhhow do i fix 'warning: not gc safe'? i'd like to store a value that was passed as a command line argument in a global variable, but then i get these warnings.
13:31:40Araqndh: do you use --verbosity:2 ? if so, try --verbosity:1
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15:11:45pdvSoooo... It seems that strings in generated JS code are passed by reference. Is this a known bug, or should I file an issue?
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15:19:14pdvOk, issue it is.
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15:23:02Araqstrings are allowed to be pass by reference, the C backend does the same
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15:28:26pdvlet s1 = "123"
15:28:26pdvvar s2 = s1
15:28:26pdvs2.setLen(0)
15:28:26pdv# fails - s1.len == 0
15:28:26pdvassert s1.len == 4
15:29:14Araqthat's not pass by ref, that's assignment
15:30:19pdvOK, my bad. Still, is this a known bug?
15:35:27Araqnot really :-)
15:36:55pdvOK, filed.
15:37:55Araqty
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