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pugscode.org/ | nopaste: sial.org/pbot/perl6 | ?eval [~] <m oo se> | We do Haskell, too | > reverse . show $ foldl1 (*) [1..4] | irclog: irc.pugscode.org/ Set by diakopter on 11 July 2007. |
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| meppl | good night | 01:11 | |
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| moritz_ | good localtime() everybody | 06:46 | |
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| spinclad | g'localtime(), @all | 07:36 | |
| masak | g'localtime(), spinclad | ||
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| spinclad | good morrow to you, good sir! | 07:45 | |
| moritz_ is too dumb for kp6 debugging | 07:46 | ||
| spinclad | and to you, good moritz_, good morrow! | 07:48 | |
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| spinclad is too lagged by a thrashing firefox to do much tonight | 07:51 | ||
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| moritz_ | are coroutines (with yield instead of return) and gather/take isomorphic? | 08:25 | |
| assuming lazy gather/take, that is | 08:37 | ||
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| spinclad | hmm. i suspect coroutines will be more general, as not constrained to a producer/consumer assymetry, but i'm not sure Perl 6 coroutines, in particular, have all the power i'm thinking of. | 08:39 | |
| certainly every yield point has a signature of what is yielded there, both on the calling side (yield ...) and the receiving side (... := coroutine(...)); | 08:43 | ||
| moritz_ | ah right, yield can probably propagate a different context than take | 08:45 | |
| spinclad | and as i have understood coroutines, a signature back when the receiving side asks it to go on. | ||
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| spinclad | the simplest case keeps these signatures fixed for the life of the coroutining pair; but with careful architecture this needn't be the case, and perhaps usefully so. | 08:47 | |
| iow, you could have sets A and B of yield points that have different interfaces; but they would have to stay in sync on both sides. | 08:48 | ||
| i wouldn't be surprised if this could be better expressed another way, though. | 08:51 | ||
| say, as a persistent object with two different methods. | 08:52 | ||
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| spinclad | well, back to thrashing, and bed. g'night, @all | 08:55 | |
| spinclad & | |||
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| TimToady | I don't think they're isomorphic. coroutines are limited to returning from the current "sub", while a take can return from any gather in the outer dynamic scope. | 09:20 | |
| though, as with loop controls, it should probably prefer a visible outer lexical scope over a hidden dynamic scope, even if the dynamic scope is inside the lexically scoped gather | 09:22 | ||
| that is, it should probably search for a gather by the same policy as S04:807 | 09:24 | ||
| (and thereabouts) | 09:25 | ||
| moritz_ | TimToady: thanks | ||
| TimToady | and could even potentially have labelled gathers, and FOO.take() | 09:26 | |
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| meppl | good morning | 09:31 | |
| moritz_ | I'm off, see you on sunday ;) | ||
| TimToady | later | 09:32 | |
| meppl | good bye mortiz | 09:33 | |
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| pmurias | fglock: you can now only write emitter for kp6 in mp6 | 10:35 | |
| *emitters | |||
| fglock | pmurias: yes | 10:36 | |
| because the AST is an mp6 object | |||
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| TimToady | note, I just changed the precedence of x, xx and ~ | 10:37 | |
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| TimToady | also, to get my fixed pugs compile perl5_init had to refer to &environ rather than &env. this might break the build elsewhere... | 10:39 | |
| fglock | TimToady: is it ok to refactor the regex AST to avoid left-recursion? | ||
| TimToady | where does it do left-recursion? | ||
| fglock | I mean, to allow left recursion, without infinite loop | 10:40 | |
| TimToady | why would you need it? | 10:42 | |
| everything calls a lower rule, except things that have some other token on the left | |||
| pmurias | you want to turn token left {<left> <something>} into token {<something>+} | 10:43 | |
| ? | |||
| fglock | yes, for example | ||
| pmurias | isn't the later clearer | 10:44 | |
| ? | |||
| fglock | hmm - I need it a while ago, it would make some grammar simpler to write - I'll try to find it | 10:47 | |
| needed | |||
| TimToady | it tends to completely screw up longest-token matching | 10:48 | |
| pmurias | fglock: fixing $foo.bar.baz? | 10:50 | |
| fglock | pmurias: that would be one case, but it is should probably be fixed with some precedence algorithm, for flexibility | 10:52 | |
| reading en.wikipedia.org/wiki/Left_recursion | 10:53 | ||
| lambdabot | Title: Left recursion - Wikipedia, the free encyclopedia | ||
| TimToady | re-zzz & | 10:55 | |
| pmurias | fglock: left recursion is hard to understand with a NFA mindset | 10:56 | |
| fglock | hmm - mindsets make certain things harder to understand | 11:01 | |
| pmurias | fglock: and somethings easy, luckily you aren't limited to one | 11:07 | |
| fglock | reading on NFA too | ||
| pmurias got confused is the perl regex engine an NFA? | 11:12 | ||
| fglock | I read that Perl 5.10 optimizes snippets to [DN]FA when possible | 11:18 | |
| pmurias | i think it is (without the nonregular features) with backtracking being transitons withought taking any input | 11:20 | |
| avar | fglock: it doesn't | 11:21 | |
| pmurias | would a perl build script be better than a Makefile? | 11:23 | |
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| avar | something that could run on all makes would be a good start | 11:25 | |
| but if you're going to write it in pure-perl it'll be troublesome to write and to get it to work with makemaker | |||
| pmurias | avar: is Module::Build an option? | 11:29 | |
| avar | why do you want to use that? | 11:30 | |
| pmurias | just looking at it, it dosn't use make at all | 11:31 | |
| avar | people generally seem to dislike it | ||
| anyway depending on make isn't a problem, but depending on GNU make is | 11:32 | ||
| you could write perl code in the .PL file to do the patsubst thing and /%.pm | |||
| pmurias | dlocaus++ wrote it | 11:33 | |
| avar: but the whole Makefile.PL feels hackish | 11:35 | ||
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| avar | sure | 11:41 | |
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| fglock | pugs: &say | 11:50 | |
| exp_evalbot | OUTPUT[\:(@?1 is copy) {}{Prim ([Pugs.AST.Internals.Val] -> Pugs.AST.Eval.Eval Pugs.AST.Internals.Val)}ā¤] | ||
| fglock | what does this mean? | 11:51 | |
| pmurias | avar: do you dislike Module::Build youself? | ||
| pugs: sub a {};&a | |||
| exp_evalbot | OUTPUT[\sub :(@_) "$_" := "Scalar" #<Scalar:0xb72c899c>ā¤ "@_" := "Array" #<Array:0xb72c756c>ā¤ "&?ROUTINE" := "Sub" #<Sub:0xb6604cec>ā¤ "&?BLOCK" := "Sub" #<Sub:0xb6604cec> {"&a" := "Sub" #<Sub:0xb722ec30>, "$_" := "Scalar" #<Scalar:0xb72d2cd8>ā¤ | ||
| .. "@_...] | |||
| avar | pmurias: I just know it routinely breaks my cpan installs by opening dialogs during make test or something | ||
| because it insists on not installing things in the normal perl module tree or something | 11:52 | ||
| fglock | how about to add the AST to the 'Code' object, to allow serialization? | 11:55 | |
| pmurias | sounds resonable | ||
| fglock | &print.perl would just return "&print" ? | 11:56 | |
| pmurias | fglock: or 'sub {...}' | 11:57 | |
| fglock | pmurias: "&print" can be eval'ed back | ||
| pmurias | fglock: yes | 11:58 | |
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| pmurias | Grammar/Sub.pm and Grammar/Term.pm give compile error in onion | 11:59 | |
| fglock | pmurias: isn't it a perltidy error? | 12:01 | |
| I got errors on embedded slashes in regexes | |||
| pmurias | fglock: could be | 12:02 | |
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| fglock | pmurias: I added a --noperltidy option to script/kp6 | 12:02 | |
| pmurias | & | 12:06 | |
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| fglock | hmm - how to represent the environment when doing $closure.perl ? | 12:09 | |
| agentzh | fglock: js's version just prints the environmental variable referenced in the function body verbatim :) | 12:11 | |
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| fglock | agentzh: same with pugs | 12:15 | |
| I'll use that | 12:16 | ||
| agentzh | :) | ||
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| pmurias | fglock: everything else in Onion works | 12:47 | |
| s/works/compiles/ | |||
| fglock | pmurias: I'll take a look later | 12:48 | |
| is it in Onion/ ? | |||
| pmurias | v6-Onion | 12:49 | |
| fglock: have you checked in --noperltidy? | 12:50 | ||
| fglock | looking | ||
| pmurias: it is in v6-KindaPerl6/script/kp6 | 12:53 | ||
| and Makefile.PL | |||
| KP6_TARGET=KP6-BOOT perl Makefile.PL | 12:54 | ||
| pmurias | fglock: found it | 12:57 | |
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| avar | -C'perl5 -notidy' | 13:28 | |
.oO( option syntax ) |
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| fglock | lunch & | 13:35 | |
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| bbkr | i wrote card 'war' game simulation (code at bbkr.org/~bbkr/card_war_game.pl) that shows some PERL6 features. do you think it's worth adding to examples? | 16:20 | |
| [particle] | sure! | 16:21 | |
| avar | bbkr: s/uniq operator/uniq method/ | 16:22 | |
| bbkr | ok | 16:23 | |
| [particle] | p5 question: can a block have multiple labels? | 16:24 | |
| avar | yes | ||
| [particle] | what's the syntax? foo: bar: {...} ? | 16:25 | |
| avar | yes | ||
| blocks don't have labels, you can put them everywhere you put a statement | |||
| [particle] | c:\usr\local\ack>perl -e"foo: bar: { 1 }" | ||
| syntax error at -e line 1, near "foo: bar:" | |||
| avar | $ perl -wle 'loop: 1; loop_two: for (1..2) {}' | 16:26 | |
| urgh | |||
| sh-3.1$ perl -wle 'loop: 1; loop_two: for (1..2) { last loop}' | |||
| Label not found for "last loop" at -e line 1. | |||
| sh-3.1$ perl -wle 'loop: 1; loop_two: for (1..2) { last loop_two }' | |||
| sh-3.1$ | |||
| I'm wrong apperently | |||
| avar thinking in C | |||
| [particle] | yeah, i'm used to c labelling too :( | 16:27 | |
| funktio | $ perl -le 'outer: { inner: for (1..2) { print } }' | ||
| [particle] | i guess that's what i'll have to do. funktio++ | ||
| avar | loop: do {{ loop_two: for (1..2) { last loop } }} <= I think this works | 16:28 | |
| funktio | avar: Label not found for "last loop" at -e line 1. | 16:29 | |
| [particle] | yeah, do doesn't take labels | ||
| you can't use next or last inside do | |||
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| avar | you can if you have a do with two brackets | 16:30 | |
| do {{ last }} | 16:31 | ||
| funktio | interesting | 16:32 | |
| [particle] | i guess then you'd need do { label: { last label } } | ||
| funktio | yeah, it's last()ing the bare block, not do | ||
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| dlocaus | [particle]: ping | 19:02 | |
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