#crystal-lang on 2017-01-14 — irc logs at freenode.irclog.whitequark.org

2017-01-07 22:37 RX14 changed the topic of #crystal-lang to: The Crystal programming language | http://crystal-lang.org | Crystal 0.20.4 | Fund Crystal's development: http://is.gd/X7PRtI | Paste > 3 lines of text to https://gist.github.com | GH: https://github.com/crystal-lang/crystal | Docs: http://crystal-lang.org/docs/ | API: http://crystal-lang.org/api/ | Logs: http://irclog.whitequark.org/crystal-lang

00:15 <Papierkorb> I really need a parser generator. I really don't want to build a parser generator. durr.

00:17 <RX14> why do you need a parser gnerator?

00:18 <Papierkorb> Wanna explore LLVM, so I need to parse code to do something useful with it

00:18 <RX14> why not just build a traditional lexter + parser?

00:18 <RX14> It's really not that hard, and I think it's easier in the long run

00:19 <Papierkorb> for a LL parser, you can do that, not great to read but yes. Not for any other algorithm though

00:20 <Papierkorb> Or simply harder to read than that BNF-esque file you stuff into the generator

00:21 <RX14> can't lexer + recursive descent parser parse pretty much everything?

00:21 <Papierkorb> LL can't do left recursion

00:21 <Papierkorb> Which isn't that big of a deal to me

00:22 <RX14> I've never really covered that part of theory

00:22 <Papierkorb> I just like the EBNF syntax more

00:23 <Papierkorb> It's easier to see if you've got a parser bug in `foo bar baz { do_stuff }` than in `when "foo" case next_tok when "bar" ...`

00:27 <Papierkorb> In fact, one could go wild and write a crystal parser generator which works through the macro run method.

00:28 <Papierkorb> I still think of the `run` macro method as being insane, but, if it's of use to me .. :P

00:42 Philpax has joined #crystal-lang

01:34 bjz has joined #crystal-lang

01:35 Ven has quit [Quit: My MacBook has gone to sleep. ZZZzzz…]

01:46 bjz has quit [Read error: Connection reset by peer]

01:57 bjz has joined #crystal-lang

02:05 elia has quit [Quit: Computer has gone to sleep.]

02:12 <Papierkorb> "I don't want to build a parser generator" he said

02:12 <Papierkorb> gg

02:12 <Papierkorb> But who parses the parser generators input syntax file?

02:12 <Papierkorb> durr

02:15 <FromGitter> <samueleaton> What does a leading double colon mean? like `alias Int32OrNil = Int32 | ::Nil` or here https://github.com/crystal-lang/crystal/blob/591f8ef030fe81d052b8e868ee1b08b451623cdf/src/json/mapping.cr#L200

02:34 <Papierkorb> samueleaton, forces Crystal to look up `Nil` starting at the global scope, and not on the local scope

02:35 <FromGitter> <samueleaton> Oh ok. makes sense. I was assuming it meant to traverse up the module scope (like `../` in a filesystem) haha so I was close.

03:05 ome has joined #crystal-lang

03:05 Philpax has quit [Ping timeout: 248 seconds]

03:10 bjz has quit [Quit: My MacBook Pro has gone to sleep. ZZZzzz…]

03:14 bjz has joined #crystal-lang

03:15 bjz has quit [Client Quit]

03:34 <FromGitter> <MaxLap> So the docs is run through gitbook? i'm not familiar with it, but am I correct in thinking that this means "we" have no control over the actual rendered website?

03:45 pawnbox has quit [Ping timeout: 248 seconds]

04:01 pawnbox has joined #crystal-lang

04:02 pawnbox has quit [Remote host closed the connection]

04:02 pawnbox has joined #crystal-lang

04:05 pawnbox has quit [Remote host closed the connection]

04:06 bjz has joined #crystal-lang

04:19 pawnbox has joined #crystal-lang

04:29 pawnbox has quit [Remote host closed the connection]

04:43 snsei has quit [Remote host closed the connection]

04:47 pawnbox has joined #crystal-lang

04:56 snsei has joined #crystal-lang

05:15 pawnbox has quit [Remote host closed the connection]

05:15 pawnbox has joined #crystal-lang

05:18 pawnbox has quit [Remote host closed the connection]

05:18 pawnbox has joined #crystal-lang

05:20 unshadow has joined #crystal-lang

05:20 unshadow has quit [Client Quit]

05:21 unshadow has joined #crystal-lang

05:23 pawnbox has quit [Remote host closed the connection]

05:24 snsei has quit [Remote host closed the connection]

05:24 pawnbox has joined #crystal-lang

05:25 pawnbox has quit [Read error: No route to host]

05:25 pawnbox has joined #crystal-lang

05:28 bjz has quit [Quit: My MacBook Pro has gone to sleep. ZZZzzz…]

05:38 pawnbox has quit [Remote host closed the connection]

05:41 pawnbox has joined #crystal-lang

05:50 <crystal-gh> [crystal] MakeNowJust opened pull request #3892: Annotate private to spec methods/classes more (master...fix/specs/more-private) https://git.io/vMVRD

05:50 <DeBot> https://github.com/crystal-lang/crystal/pull/3892 (Annotate private to spec methods/classes more)

05:51 unshadow has quit [Ping timeout: 258 seconds]

05:51 pawnbox has quit [Remote host closed the connection]

05:56 snsei has joined #crystal-lang

06:00 snsei has quit [Ping timeout: 252 seconds]

06:04 pawnbox has joined #crystal-lang

06:07 pawnbox has quit [Remote host closed the connection]

06:11 pawnbox has joined #crystal-lang

06:15 ome has quit [Quit: Connection closed for inactivity]

06:21 pawnbox has quit [Remote host closed the connection]

06:25 pawnbox has joined #crystal-lang

06:29 pawnbox has quit [Remote host closed the connection]

06:40 <FromGitter> <david50407> @MaxLap what do you mean the control over the rendered website?

06:41 <FromGitter> <david50407> Right now, the doc is rendered by gitbook-cli tool which supports many plugins and custom template

06:43 <FromGitter> <david50407> (not the gitbook.com one, gitbook released its toolchain as open source project that we can render by ourself

06:52 snsei has joined #crystal-lang

07:04 pawnbox has joined #crystal-lang

07:12 pawnbox has quit [Remote host closed the connection]

07:15 pawnbox has joined #crystal-lang

07:15 pawnbox has quit [Read error: Connection reset by peer]

07:15 pawnbox has joined #crystal-lang

07:25 pawnbox has quit [Remote host closed the connection]

07:25 pawnbox has joined #crystal-lang

07:29 DeBot has quit [Remote host closed the connection]

07:30 DeBot has joined #crystal-lang

07:31 pawnbox has quit [Remote host closed the connection]

07:49 snsei has quit [Remote host closed the connection]

08:12 <FromGitter> <samueleaton> @MaxLap The gitbook repo is here: https://github.com/crystal-lang/crystal-book ⏎ Any changes to the master branch are reflected in the site.

08:29 bjz has joined #crystal-lang

08:32 pawnbox has joined #crystal-lang

08:42 pawnbox has quit [Remote host closed the connection]

08:43 pawnbox has joined #crystal-lang

08:46 pawnbox has quit [Remote host closed the connection]

08:49 pawnbox has joined #crystal-lang

08:49 snsei has joined #crystal-lang

08:50 pawnbox has quit [Remote host closed the connection]

08:54 snsei has quit [Ping timeout: 258 seconds]

08:58 <crystal-gh> [crystal] hinrik opened pull request #3893: Fix misplaced \n in String documentation (master...fix_string_doc_multiline) https://git.io/vMVgb

08:58 <DeBot> https://github.com/crystal-lang/crystal/pull/3893 (Fix misplaced \n in String documentation)

09:05 pawnbox has joined #crystal-lang

09:20 <literal> is myset.to_a.sample the most efficent way to get a random element from a set?

09:49 pawnbox has quit [Remote host closed the connection]

09:50 bjz has quit [Quit: My MacBook Pro has gone to sleep. ZZZzzz…]

09:55 pawnbox has joined #crystal-lang

10:01 pawnbox_ has joined #crystal-lang

10:01 Raimondi has quit [Read error: Connection reset by peer]

10:01 pawnbox has quit [Ping timeout: 252 seconds]

10:02 <BlaXpirit> literal, well it's probably the most reasonable way currently

10:04 Raimondi has joined #crystal-lang

10:08 <literal> alright

10:08 <literal> what am I doing wrong here? https://gist.github.com/hinrik/3e7ba168e6a0b3acf22cc36e1a323044

10:08 <BlaXpirit> literal, it might be more efficient to do like... taking random number in range of the size, then each_with_index and return value when index equals that number

10:09 <literal> I see

10:09 <BlaXpirit> literal, what you're doing wrong: the hash table contains values of the type Set(Int32), but you're trying to add a value of the type Set(Int32).class

10:09 <BlaXpirit> trying to add the type itself, not a value of the type

10:09 <BlaXpirit> probably want Set(Int32).new instead

10:10 <literal> ah, right

10:16 pawnbox_ has quit [Remote host closed the connection]

10:17 pawnbox has joined #crystal-lang

10:21 pawnbox has quit [Ping timeout: 245 seconds]

10:35 <Yxhuvud> papierkorb: I have a parser generator. One problem though - it is only a recognizer so far as I've never figured out how to build the damned parse trees. (yeah, the plural on trees is intentional. It would generate them all)

10:36 <Yxhuvud> I should probably revisit it though - it has been many crystal versions since I looked at it and there are plenty of new features (and insight on my side) that should be applied.

10:39 pawnbox has joined #crystal-lang

10:43 <Yxhuvud> I should figure it out some day. Or year ;)

10:58 bjz has joined #crystal-lang

11:01 DeBot has quit [Read error: Connection reset by peer]

11:01 DeBot has joined #crystal-lang

11:02 pawnbox has quit [Remote host closed the connection]

11:03 pawnbox has joined #crystal-lang

11:04 elia has joined #crystal-lang

11:05 pawnbox_ has joined #crystal-lang

11:06 pawnbox has quit [Remote host closed the connection]

11:26 <crystal-gh> [crystal] MakeNowJust opened pull request #3895: Enclose true, false and nil in backquote on document comment (master...fix/doc/enclose-nil-true-false) https://git.io/vMVoD

11:26 <DeBot> https://github.com/crystal-lang/crystal/pull/3895 (Enclose true, false and nil in backquote on document comment)

11:30 <crystal-gh> [crystal] ysbaddaden closed pull request #3893: Fix misplaced \n in String documentation (master...fix_string_doc_multiline) https://git.io/vMVgb

11:30 <DeBot> https://github.com/crystal-lang/crystal/pull/3893 (Fix misplaced \n in String documentation)

11:37 pawnbox_ has quit [Remote host closed the connection]

11:38 pawnbox has joined #crystal-lang

11:43 _whitelogger has joined #crystal-lang

12:00 <FromGitter> <MaxLap> @samueleaton I found that, but i was referring to things like improving the search for example

12:00 <FromGitter> <MaxLap> @david50407 Ah, interesting, the plugins route could be helpful for what I have in mind

12:03 bjz_ has joined #crystal-lang

12:04 bjz has quit [Ping timeout: 240 seconds]

12:05 <travis-ci> crystal-lang/crystal#ab64b03 (master - Fix misplaced \n in String documentation (#3893)): The build passed. https://travis-ci.org/crystal-lang/crystal/builds/191891940

12:05 <DeBot> https://github.com/crystal-lang/crystal/pull/3893 (Fix misplaced \n in String documentation)

12:07 pawnbox has quit [Remote host closed the connection]

12:17 A124 has quit [Ping timeout: 260 seconds]

12:18 A124 has joined #crystal-lang

12:21 snsei has joined #crystal-lang

12:26 snsei has quit [Ping timeout: 248 seconds]

12:33 <crystal-gh> [crystal] mverzilli closed pull request #3895: Enclose true, false and nil in backquote on document comment (master...fix/doc/enclose-nil-true-false) https://git.io/vMVoD

12:33 <DeBot> https://github.com/crystal-lang/crystal/pull/3895 (Enclose true, false and nil in backquote on document comment)

12:42 bjz has joined #crystal-lang

12:43 bjz_ has quit [Ping timeout: 248 seconds]

12:54 <travis-ci> crystal-lang/crystal#45e4f22 (master - Merge pull request #3895 from MakeNowJust/fix/doc/enclose-nil-true-false): The build passed. https://travis-ci.org/crystal-lang/crystal/builds/191899619

12:54 <DeBot> https://github.com/crystal-lang/crystal/pull/3895 (Enclose true, false and nil in backquote on document comment)

13:00 Kug3lis has joined #crystal-lang

13:01 elia has quit [Quit: Computer has gone to sleep.]

13:06 Kug3lis has quit [Quit: My MacBook has gone to sleep. ZZZzzz…]

13:22 bjz has quit [Quit: My MacBook Pro has gone to sleep. ZZZzzz…]

13:42 Ven has joined #crystal-lang

14:23 snsei has joined #crystal-lang

14:27 snsei has quit [Ping timeout: 255 seconds]

14:29 Ven has quit [Quit: My MacBook has gone to sleep. ZZZzzz…]

14:46 <FromGitter> <exts> is there a way to force crystal deps to delete shard.lock? i ran `crystal deps` and it kept checking for an old commit until i deleted that file. that normal? currently building from vagrant box ubuntu/trusty64 14.04

14:48 <FromGitter> <exts> nvm i know what happened, I'm an idiot - i was running crystal deps locally instead of through the vm... oops

15:11 A124 has quit [Ping timeout: 240 seconds]

15:25 A124 has joined #crystal-lang

15:30 Kug3lis has joined #crystal-lang

15:33 <FromGitter> <exts> anyone have an SMTP shard that supports auth?

15:34 <crystal-gh> [crystal] MaxLap opened pull request #3896: `crystal doc` checks is_crystal_repo based on any remote (master...max_fix_is_crystal_repo) https://git.io/vMVH4

15:34 <DeBot> https://github.com/crystal-lang/crystal/pull/3896 (`crystal doc` checks is_crystal_repo based on any remote)

16:01 <Papierkorb> Why does `alias Map = Hash(String, Map | String); Map.new` complain about `Map.new` not existing?

16:03 <Papierkorb> Was an old issue, but how do I do that then?

16:08 unshadow has joined #crystal-lang

16:10 <BlaXpirit> yeah weird, i don't know

16:12 <Papierkorb> Using a `record` for now. it's more annoying though

16:13 pawnbox has joined #crystal-lang

16:17 pawnbox has quit [Remote host closed the connection]

16:17 snsei has joined #crystal-lang

17:11 pawnbox has joined #crystal-lang

17:16 pawnbox has quit [Ping timeout: 252 seconds]

17:32 <Yxhuvud> Hmm. Do we have any example somewhere of a self-recursive array type?

17:41 pawnbox has joined #crystal-lang

17:41 <Papierkorb> No, as they don't work :)

17:44 <Yxhuvud> that's inconvenient when working with trees :/

17:53 Kug3lis has joined #crystal-lang

18:11 <Papierkorb> Yep exactly my use-case

18:18 <splitty_> Do we have bitfield support in Crystal?

18:21 <RX14> splitty_, https://crystal-lang.org/api/0.20.4/BitArray.html

18:22 <RX14> also #bit on Int

18:22 <RX14> but not really in structs

18:23 <splitty_> Sadly neither of those are gonna work for me

18:23 <splitty_> So bit twiddling it is

18:23 <RX14> well you can copy #bit

18:23 <RX14> or do you need to do like

18:23 <RX14> multi-bit bitfields

18:23 <splitty_> I've already implemented #bit, but I need to set multiple bits

18:23 <splitty_> Y eah

18:24 <splitty_> RX14, I need to translate the following struct to Crystal: https://hastebin.com/opozuworic.cpp

18:24 <splitty_> Right now I just use a single UInt32 and use #bit and some bit twiddling to get the frame

18:25 <RX14> so thats... one and a half bytes before "frame"?

18:25 <RX14> who designed this!

18:26 <RX14> but yes, bit twiddling seems like the only way to do this

18:26 <RX14> you could open an issue

18:26 <RX14> and I think it would get momentum

18:32 <splitty_> I'll add it to my To-Do list

18:35 unshadow has quit [*.net *.split]

18:38 unshadow has joined #crystal-lang

19:08 <FromGitter> <spalladino> @Papierkorb have you seen https://github.com/ziprandom/cltk ?

19:38 DeBot has quit [Remote host closed the connection]

19:38 DeBot has joined #crystal-lang

19:47 <Papierkorb> spalladino, no I haven't

19:47 <Yxhuvud> spalladino: What parsing algo does that implement?

19:54 unshadow_ has joined #crystal-lang

19:57 unshadow has quit [Ping timeout: 255 seconds]

20:32 <splitty_> RX14, Papierkorb: https://github.com/crystal-lang/crystal/issues/3898

20:48 matp has joined #crystal-lang

21:17 unshadow_ has quit [Quit: leaving]

21:24 DeBot has quit [Read error: Connection reset by peer]

21:25 DeBot has joined #crystal-lang

22:07 <crystal-gh> [crystal] kostya opened pull request #3899: Select: fix case when select send executed before select receive, fixed #3862 (master...fix_select) https://git.io/vMwIr

22:07 <DeBot> https://github.com/crystal-lang/crystal/pull/3899 (Select: fix case when select send executed before select receive, fixed #3862) | https://github.com/crystal-lang/crystal/issues/3862 (Select in some cases hangs forever)

22:13 bjz has joined #crystal-lang

22:49 A124 has quit [Remote host closed the connection]

22:52 A124 has joined #crystal-lang

22:56 elia has joined #crystal-lang

23:00 matp has quit [Quit: ZZzzzZz...]

23:05 matp has joined #crystal-lang

23:26 vikaton has joined #crystal-lang

23:32 bazaar has quit [Quit: leaving]

23:34 bazaar has joined #crystal-lang

23:46 bjz has quit [Quit: My MacBook Pro has gone to sleep. ZZZzzz…]