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| 08:23:58 | dalarmmst | http://pastebin.com/Znusx5bL , could anyone guide me in this failure? I'm not sure what's wrong |
| 08:25:44 | notfowl | dalarmmst, you pass it a ref but it doesnt want a ref: x86instruction.desc(i: OneOpInstr[desc.T]) |
| 08:26:09 | dalarmmst | So I must create a proc doing the same thing but on a ref? |
| 08:26:18 | dalarmmst | It's just a new copy paste with ref as parameter instead? |
| 08:26:27 | notfowl | you can deref it |
| 08:26:33 | notfowl | desc(instr[]) |
| 08:26:59 | dalarmmst | Then it will still be a reference when passed right? |
| 08:27:09 | dalarmmst | (I don't want it to be copied) |
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| 08:31:58 | dalarmmst | notfowl: Thanks! |
| 08:36:25 | notfowl | dalarmmst, it can still be passed by reference. up to the compiler, it depends on how big it is |
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| 09:10:10 | dalarmmst | Does anyone have an idea of what the problem is here? http://pastebin.com/aZPcJ6cT |
| 09:11:09 | BlaXpirit | dalarmmst, if you see C code, it's certainly a compiler bug |
| 09:11:33 | dalarmmst | Should I file a bug somewhere? |
| 09:11:44 | BlaXpirit | I don't know. such bugs aren't that rare |
| 09:12:01 | BlaXpirit | can happen if you do something very obscure, and might not be worth fixing |
| 09:12:23 | BlaXpirit | by obscure I mean something that wouldn't work in any case |
| 09:12:51 | BlaXpirit | and i don't think this proc tells anything at all |
| 09:13:02 | dalarmmst | I'll try to write a small reproducer |
| 09:13:09 | BlaXpirit | please do |
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| 09:20:37 | dalarmmst | I can trigger the same error with this: http://pastebin.com/HnfMvky7 |
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| 09:22:29 | BlaXpirit | good |
| 09:23:40 | BlaXpirit | dalarmmst, and it is like i said |
| 09:23:49 | BlaXpirit | you have double ref |
| 09:24:22 | BlaXpirit | why : ref Instr when it is already ref object |
| 09:25:56 | dalarmmst | I thought newOneOpInstr() returned a ref OneOpInstr[T], and that x() just casts ref OneOpInstr[T] to ref Instr, but you mean now it is a ref ref OneOpInstr[T]? |
| 09:27:51 | BlaXpirit | dalarmmst, something like that |
| 09:28:22 | BlaXpirit | dalarmmst, just remove `ref` from both proc return types |
| 09:28:41 | BlaXpirit | ref object means ref is always associated with it |
| 09:28:54 | BlaXpirit | you could also remove ref from the type declarations |
| 09:29:07 | dalarmmst | Ah ok, thanks! |
| 09:29:34 | dalarmmst | The second option is probably better for me, so that I can should when they should be manager or not |
| 09:29:38 | dalarmmst | chose* |
| 09:29:47 | dalarmmst | choose* .. |
| 09:30:14 | dalarmmst | Thanks for the help |
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| 09:34:04 | bluenote | dalarmmst: without the additional refs, your example also seems to work :) |
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| 09:56:11 | dalarmmst | http://pastebin.com/vGZ9zLs2 How do I get desc() for OneOpInstr to execute here instead? I want to do like a virtual call in C++ here |
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| 09:59:34 | BlaXpirit | i think it's supposed to work |
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| 10:20:09 | dalarmmst | It works when templates are not involved. http://pastebin.com/zq7kwxV4 |
| 10:20:52 | dalarmmst | (generics might be the right name in nim) |
| 10:21:05 | dalarmmst | I do want to use generics though |
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| 11:30:21 | synthmeat | any particular reason why inc/dec are .discardable but succ/pred not? |
| 11:33:18 | BlaXpirit | synthmeat, that would be a no-op |
| 11:33:44 | BlaXpirit | read docs, you seem to be confused |
| 11:33:46 | synthmeat | BlaXpirit: i'm sorry, "no-op"? not optimized? |
| 11:33:57 | BlaXpirit | discard succ x does nothing |
| 11:33:57 | synthmeat | BlaXpirit: yeah, reading up on nim-lang tutorial, part 1 |
| 11:34:16 | BlaXpirit | no-op = do nothing |
| 11:34:24 | BlaXpirit | http://nim-lang.org/docs/system.html#succ,Ordinal%5BT%5D,int |
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| 11:35:04 | BlaXpirit | inc x is the same as x = succ x |
| 11:35:15 | BlaXpirit | succ doesn't modify its argument |
| 11:35:31 | synthmeat | noSideEffect would be that? |
| 11:35:48 | synthmeat | (nope, i see) |
| 11:36:05 | BlaXpirit | lol why the heck is inc noSideEffect |
| 11:36:16 | synthmeat | BlaXpirit: yeah, now i'm confused |
| 11:36:25 | BlaXpirit | just read the text |
| 11:37:46 | synthmeat | yeah, ok, inc/dec is just convenience for succ/pred. yeah, it makes sense now. |
| 11:37:49 | synthmeat | thanks |
| 11:41:39 | synthmeat | BlaXpirit: inc/dec do have side-effects though, by wikipedia definition of side-effect |
| 11:41:56 | BlaXpirit | [:36:04] <BlaXpirit> lol why the heck is inc noSideEffect |
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| 11:42:43 | r-ku | can "quote do" be "immediate"? |
| 11:42:54 | synthmeat | BlaXpirit: oh, ok. i interpreted your "just read the text" to my agreement to my that statement of yours as "you're wrong. read." |
| 11:42:57 | synthmeat | nvm :) |
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| 16:24:24 | Xe | How would I distribute nim programs as C sources like the nim compiler? |
| 16:30:17 | r-ku | c sources end up in nimcache folder, you can get them there |
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| 16:35:43 | def- | Xe: the C files may be platform dependent already, maybe this is of interest: http://hookrace.net/blog/what-makes-nim-practical/#source-distribution |
| 16:45:24 | federico3 | any QR code generator for Nim? |
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| 17:06:32 | Senketsu | >could not load: libgobject-2.0-0.dll have it in path, tried putting in the dir too, im clueless |
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| 17:41:05 | def- | Senketsu: maybe it's a 32/64 bit problem? |
| 17:41:33 | def- | Senketsu: the library needs to be the same architecture. unfortunately you don't get a nice error about that |
| 17:42:06 | Senketsu | actually let me check, i havent used this vm in a while not sure about the architecture |
| 17:42:08 | federico3 | any example of using tun/tap with Nim? |
| 17:47:52 | Varriount | federico3: You mean, the drivers/network adapters? |
| 17:50:58 | federico3 | Varriount: opening /dev/net/tun and using it |
| 17:54:40 | Senketsu | def-, since i could find the original archive of the libs in the VM to check arch, copied my packs i have on win host, and nope it still wont load |
| 17:55:43 | Senketsu | couldnt* |
| 17:57:08 | def- | Senketsu: maybe you compile Nim programs for 32bit? |
| 17:57:13 | def- | (I don't know how it is on Windows) |
| 18:00:00 | Senketsu | (me neither) but i installed the x64 pack ,os is x64 lib is x64 and the compiler too , even tried the x86 libs just in case |
| 18:01:00 | Senketsu | maybe the loadlib is at fault again ? |
| 18:01:47 | Varriount | All I can say is that 32-bit programs won't load 64-bit dll's, and vice-versa |
| 18:03:11 | Varriount | You can check whether a running program is 64-bit or 32-bit by opening the task manager and looking under 'processes' (or 'details' on Win8), and examining the process name |
| 18:03:27 | Senketsu | that is if you can run it ;) |
| 18:04:10 | Senketsu | but thats something im aware of long time and i already mentoied that i tried both versions just in case |
| 18:04:20 | federico3 | how can I do ioctl() in Nim? |
| 18:06:50 | def- | federico3: i don't see ioctl being imported. maybe you have to add it to the posix module |
| 18:07:38 | federico3 | sigh |
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| 19:38:08 | perturbation | hey all - how does bound checking for sequences work? This (https://gist.github.com/singularperturbation/90299190a948d9c5d2bf) compiles with checks on but I'm not sure if it should |
| 19:38:50 | perturbation | (running v0.11.2 0b184f2584221543a7dec9c8ae4a700533919e0c) |
| 19:39:53 | def- | perturbation: these are runtime checks, not compile time checks |
| 19:40:03 | def- | and they're enabled by default, only -d:release disables them |
| 19:40:38 | perturbation | ok - I do get a nice error message that tells me where the problem is at runtime |
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| 19:42:06 | def- | an exception even, so you can catch it in your program and handle it properly |
| 19:42:22 | perturbation | yeah - 'Error: unhandled exception: index out of bounds [IndexError]' (with matching line no. above) |
| 19:42:35 | perturbation | I just misremembered and thought it was caught at compile time |
| 19:44:46 | Araq | perturbation: it is for the parallel statement ... but well, the prover is limited |
| 19:46:34 | Araq | though eventually I like to use this technology for every array/seq access |
| 19:46:54 | perturbation | gotcha - thanks def, Araq |
| 19:47:14 | perturbation | also - I've been looking more closely at how Nim does parallelism - I'm not really sure where I would use a FlowVar[T] vs. a Future[T] |
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| 19:48:19 | Araq | Future[T] is for async, FlowVar[T] for threading |
| 19:48:58 | Araq | def-: the spec says you cannot catch IndexError :P |
| 19:49:13 | Araq | but the implementation allows it |
| 19:58:05 | perturbation | I'll ask the dumb question: what is the difference between async and threading if I just want (say) a DB request with timeout |
| 19:58:25 | perturbation | I'm envisioning I could create two FlowVar[T] or Future[T] vars with a timer |
| 19:58:40 | perturbation | and awaitAny to see which returns first (the actual response, or the timeout) |
| 20:00:19 | Araq | Future[T] seems to be what you want |
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| 20:13:53 | perturbation | okay - I think I'll try to do a writeup once I'm done (write a simple CLI IRC client) |
| 20:14:01 | perturbation | asyncnet may be doing most (all?) of the heavy lifting though |
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| 20:27:01 | perturbation | oh - Future[T] w/ asyncdispatch runs in an event loop single-threaded (like node.js... err... libuv), whereas FlowVar[T] / threadpool are *actual threads* that can run at the same time |
| 20:27:18 | perturbation | who would have thought threadpool == threads :) |
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| 20:40:18 | redwyn | hi. has anybody tried out the howistart.org/posts/nim tutorial? |
| 20:42:12 | redwyn | i'm right at the point where it's possible to interpret the 3 brainfuck-examples for the first time and i get an error "under- or overflow" |
| 20:42:46 | redwyn | when i try it on the rot13 or mandelbrot example...but when i compile with -d:release this doesn't happen |
| 20:43:51 | redwyn | should it not work regardless of compilation mode, just slower without -d:release? |
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| 20:49:55 | notfowl | No |
| 20:50:28 | notfowl | Release mode doesn't have overflow checks |
| 20:51:15 | notfowl | Ping def- |
| 20:52:54 | def- | notfowl: hi |
| 20:53:14 | def- | redwyn: oh, let me see |
| 20:55:18 | redwyn | just to be clear, its compiling alright...no errors there in both neither case |
| 20:55:33 | redwyn | i find that strange, because checks happen at compilation or not? |
| 20:55:54 | def- | no, checks happen at runtime |
| 20:55:55 | notfowl | Not always possible |
| 20:56:33 | def- | oh right, something changed in Nim: inc and dec now can overflow |
| 20:56:59 | def- | I solved this in my repository with a {.overflowchecks: off.}, hmm |
| 20:57:10 | notfowl | Sounds like a breaking change if ever heard of one |
| 20:57:15 | def- | indeed |
| 20:57:25 | def- | because I have chars in the brainfuck tape |
| 20:57:31 | def- | and they should wrap around |
| 20:58:00 | redwyn | alright. so nim checks wether a stack over-/underflow could be at all possible and stops rather before that happens? |
| 20:58:30 | def- | redwyn: no, there's a concrete overflow happening there and an exception is thrown. with -d:release these runtime checks are disabled |
| 20:58:37 | notfowl | def-: the versions that allow overflow should be xinc xdec like xadd, xlen, no? |
| 20:59:04 | def- | notfowl: not sure. maybe i should just use unsigned chars, which just wrap around |
| 20:59:36 | notfowl | That solves your problem |
| 20:59:49 | notfowl | I have to worry about everywhere I use inc/Dec now |
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| 21:00:15 | def- | notfowl: well, actually they always were supposed to overflow, it was just a bug (which i reported) |
| 21:00:21 | redwyn | yes, thanks. |
| 21:01:42 | def- | I see 3 ways of dealing with this: writing a custom wrapping inc/dec, using {.overflowchecks: off.} or switching to uchars |
| 21:01:47 | def- | i'm wondering what's the best |
| 21:02:51 | def- | wait, char IS unsigned already |
| 21:03:06 | def- | Araq: should it even throw an exception? |
| 21:03:08 | redwyn | Oh and you are the author of the tutorial? |
| 21:03:15 | def- | redwyn: right |
| 21:03:31 | redwyn | Alright, thanks! It's really nice |
| 21:03:35 | def- | Sorry about that problem, I updated the repository but forgot to update the tutorial I guess |
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| 21:04:33 | redwyn | No problem at all, i just wanted to understand why there were different behaviours depending on how i compile |
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| 21:28:19 | BlaXpirit | what constructs in Nim require indentation but not after `:`? |
| 21:28:38 | BlaXpirit | i mean like `if ...:` vs `proc ... =` |
| 21:28:56 | notfowl | Type x = object |
| 21:29:19 | BlaXpirit | good one, any more? |
| 21:29:42 | notfowl | Let, var |
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| 21:30:09 | BlaXpirit | well, you can live without indentation |
| 21:30:16 | BlaXpirit | in these |
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| 21:57:13 | BlaXpirit | is it possible to catch compile time exception? like from parseStmt |
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| 23:49:14 | Senketsu | do i understand this right ? http://a.pomf.se/sjmifk.png because of isIpAddress the whole thing is not gc safe ? |
| 23:56:33 | dom96 | oh cool. |
| 23:56:40 | dom96 | Didn't realise the errors got better for that. |
| 23:57:03 | dom96 | Senketsu: I think you got that right, yeah. |
| 23:59:47 | Senketsu | kind of sux :\ |
