Why does instaparse not throw errors? Curious about the reasoning behind this design. -Zack
On Wednesday, June 12, 2013 9:46:06 AM UTC-4, JeremyS wrote: > > Hi puzzler, > > I have a project <https://github.com/JeremS/cljss-core/tree/v0.4.0> that > I have been meaning to be useable from Clojure and ClojureScript. To do so > I am using lein-dalap <http://birdseyesoftware.github.io/lein-dalap.docs/> > . > > I totally agree with you about the issues you have foreseen. The protocols > aren't exactly the same, the java specific parts would need to be rewritten > in cljs, I don't know how much work it would need to have the incremental > vector working in cljs since hashing isn't > 'embedded' in JavaScript (cljs uses the google closure libraries for > that). lein-dalap <http://birdseyesoftware.github.io/lein-dalap.docs/> helps > resolve some of these issues but not all of them. > (cljx<https://github.com/lynaghk/cljx> might > also be an alternative) > > I will totally add a request on github. I know it's a big wish to see > instaparse in cljs and I'd love to contribute as best I can. > > I'd also like to give a little rationale for the cljs adaptation. I am a > big fan of LightTable, which I use most of the time now. LT is written > in ClojureScript and I can't wait to see the plugin system released in > future versions. Using instaparse to extend it would be really neet since > it supports ABNF grammar and, as your wiki taught me, ABNF makes for > standard grammars that we can find on the internet. It would be nice to > exploit directly these grammar in LT using instaparse. > > Another useful use case is in browser editors for syntaxes like markdown. > I have read a blog post considering markdown potentially armful and arguing > in favour of the wiki creole syntax. There is an EBNF grammar for creole... > > Last but very not the least, there are some very inspiring talks from Alan > Kay that advocate lisp philosophy of programming, > molding the language to your problem and coding in a language that suits > the domain of the problem. Instaparse is a great > tool to generate our own languages and I am coding some ClojureScript code > at the moment so call me biased... :) > > Cheers, > > Jeremys > > > > On Wednesday, June 12, 2013 12:09:56 AM UTC+2, puzzler wrote: >> >> Honestly I hadn't yet given it any thought. Thanks for the interest in >> having it on Clojurescript. Here are a few issues that come to mind: >> >> 1. To achieve performance, I've spent time coding custom data structures >> that implement various Clojure and Java interfaces. I haven't done much >> with Clojurescript, but my impression is that the ecosystem of protocols is >> completely different, so I imagine that could be a pain to transfer over. >> >> 2. I don't know much about the performance of Javascript/Clojurescript's >> underlying data structures. For example, in Java, the substring operation >> used to be O(1), but recently, much to my dismay, they changed it to O(n). >> That change was annoying, and it means I'm going to have to rework some >> code to deal with that, but at least I heard about it and can take it into >> account. But in Javascript I don't even *know* the performance >> characteristics of its strings and substring operation. What other >> Javascript performance gotchas don't I know about? >> >> 3. I'm assuming that due to the above, it won't be as simple as just >> recompiling the code for Clojurescript. I have no idea what's involved >> with maintaining a code base for the two target languages simultaneously. >> Sounds non-trivial, although maybe it won't seem so intimidating once >> things have settled down and I'm not making quite so many performance >> tweaks and feature enhancements to the code. >> >> In any case, please add your request as a github issue, so I don't forget >> about it. >> >> On Tue, Jun 11, 2013 at 8:06 AM, JeremyS <jschof...@gmail.com> wrote: >> >>> Hi Puzzler, >>> >>> I was wondering if you planned to port Instaparse to ClojureScript. I >>> know it's asking a lot, but I am one of those who would love >>> to be able to run it in a browser or in node.js... >>> >>> Cheers, >>> >>> Jeremys. >>> >> -- -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups "Clojure" group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
