World: r3wp
[Parse] Discussion of PARSE dialect
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BrianH 8-Nov-2008 [2951] | Thanks, Graham :) |
Graham 8-Nov-2008 [2952] | Pekr, Gabriele, Tomc, yourself and I are probably the longest Rebolers here these days |
BrianH 8-Nov-2008 [2953] | btw Sunanda, I can't remember who was the first to think of having trace support for PARSE, but it wasn't me :) |
Graham 8-Nov-2008 [2954] | Is attribution really important? |
BrianH 8-Nov-2008 [2955] | Steeve has indicated that it is. |
Graham 8-Nov-2008 [2956] | Is the driving force for fixing parse so that it can better parse data, or, to build better dialects, or both? |
BrianH 8-Nov-2008 [2957x3] | Strangely enough I wasn't talking about code I had posted that you might have used. In the early days before REBOL.org, I tended to post code to the mailing list. The code that you would have used would have been in REBOL itself - I used to give very detailed messages to feedback about mezzanine bugs, usually with rewrites. Many of those rewrites made it into REBOL, especially in the 2.5 version. Some natives too (to-local-file and to-rebol-file were based on REBOL code I wrote and posted). |
Right now the driving force is building better dialects - Carl needs it for the new GUI dialects. The data parsing improvements have just accumulated over the years and now seems like as good a time as any, especially because of the R3 compatibility break. | |
Some are needed because of Unicode. You can't effectively complement a charset anymore so NOT is needed. | |
Graham 8-Nov-2008 [2960x2] | ahh... so we can blame you for to-rebol-file problems?? :) |
http://members.core.com/~bhawley/rebol/to-rebol-file.r | |
BrianH 8-Nov-2008 [2962x2] | I can't shut down that website - my account was canceled more than 6 years ago and I can't access it. If you look elsewhere on the site you will find the only site on the internet with the Oberon Compiler for DOS - the developer disappeared without a trace. |
I've wanted to change the licensing on that script to BSD for years. It can do more than the native version - they simplified it. | |
Graham 8-Nov-2008 [2964] | Your CV is a bit out of date! |
BrianH 8-Nov-2008 [2965x3] | Can't edit the site :( |
Wow, that code is so primitive. | |
Except require.r - that is advanced even today. | |
Anton 8-Nov-2008 [2968] | I should just say that I really appreciate the enormous amount of energy that BrianH has put into this project (and generally). I can see there's a lot of work to manage all the proposals. |
Steeve 8-Nov-2008 [2969] | 2, 3 tips I know that Brian is great contributor but I think sometimes it tends to reject a bit too easily ideas of others. Why I am saying this, is that I am not always convinced by his arguments but he acts as if the issue was resolved in advance. (I may have a problem with that) About who is credited with what, I think that this is not important too, however it was a bit of supris seeing the name of Brian on most of the ideas, then as I said previously, this makes many years that these Improvements have been suggested by different people. Obviously this is not an important step, but Brian, you puting your name everywhere pretexting you collect ideas is a little ... how to say that ? pretentious. Personally, I am a large user of parsing. I think this is the most important function in Rebol. You can do practically everything with it. Design dialects, interfaces, and many others things. Parse can build programs by clearly showing the data structures your are dealing with. Thus our scripts win in readability. During all these years, I was very frustrated seeing some limitations. I thought, oh my God, if only we could do this simply, REBOL would be so powerful. My view is that parse should be extended (as far as possible) to gain in expressiveness. One thing I don't like with parse, is the cumbersome process to pass parameters to functions. I give an example. usually we do: [copy parm my-rule (my-func parm)] If parse knew recognize when to call a function we could write: [Myfunc my-rule] This would be much more compact and expressive. More, we could use return value of myfunc to guess if the parsing should continue or not. This development would discard most of proposals that were made because we could add many new commands very easily. (IF NOT ALL RETURN etc ...) |
Graham 8-Nov-2008 [2970x3] | Steeve, that looks like a major change ... whereas I think Carl is just asking for enhancements. Maybe Rebol4 ?? |
ps: I don't mind being confused with BrianH :) | |
maybe that way I'll gain access to some of the private channels ! lol | |
Steeve 8-Nov-2008 [2973] | u could, you are a celebrity (for me, after what i said to Brian, there's no chance) ;-) |
Graham 8-Nov-2008 [2974x2] | All this parse stuff is over my head .. I try to avoid headaches. Let the experts work it out I say. |
I just want to be able to better parse XML namespaces and all. | |
Steeve 8-Nov-2008 [2976x2] | i agree, better is my second name, lol |
and my english is to poor to dealing with experts | |
Graham 8-Nov-2008 [2978x2] | you could write in french ... |
Off topic ... but one of my first chat programs used SOAP to do automatic translations | |
Steeve 8-Nov-2008 [2980x2] | i think i do a little better than automatic translators. |
no ? ;-) | |
Graham 8-Nov-2008 [2982] | But it means that native french speakers could read it as you intended ... |
Steeve 8-Nov-2008 [2983x4] | but the |
French Reboler are not very interesting with my strayings | |
The French forum lost many contributors during last years | |
currently most of them are beginners | |
Graham 8-Nov-2008 [2987] | that's a world wide phenomenon |
Steeve 8-Nov-2008 [2988] | DockKimbel never participate, Didec is scarce, there is only Shadwolf. |
BrianH 8-Nov-2008 [2989x2] | Steeve, your latest suggestion is very similar to the RULE! type REP (11). Unfortunately, Graham is right that this would basically require rewriting PARSE from scratch as a function type. This is something I have wanted to do for years, and will get the chance to do so once R3's user-defined datatypes are available. I like the way you think :) |
I was not putting my name everywhere on those proposals. I only put my name on the proposals I came up with personally, including proposals from the REPs that I came up with during the conversations that led up to the REPs being collected. The issues that I say have been resolved were resolved in conversations with Carl earlier this week. We had already been discussing these problems for a couple days before you joined in. | |
Steeve 8-Nov-2008 [2991] | ok it is only that the decision process seemed a bit opaque |
BrianH 8-Nov-2008 [2992x3] | Almost all of the proposals in the Parse Proposals page are derived from Gabriele's parse REPs page. Most of the subsequent requests were covered by one or more of those REPs. We had a pretty exhaustive discussion about the subject years ago and PARSE hasn't changed since, so its problems and limitations have been mostly the same. |
I am not being pretentious - I really did come up with those proposals on my own before the first comment was made to the blog or here. I have been asking for more proposals but so far there haven't been that many that weren't already covered. And it is not a problem for me to reject proposals - it is my job. I've already pushed through more proposals than Carl is comfortable with, but I have hope that they will be accepted. Please give more suggestions, but consider that they will be debated before they will be accepted. Only the best would even be considered by Carl (he's got more stringent standards than mine). | |
The final decisions are made by Carl. He's the language director and he'll be implementing this stuff. If he say it can't happen, it can't happen. If I say that it can happen later when another feature is added, you can be sure that I have already figured out how to do so - I wouldn't say otherwise. | |
Steeve 8-Nov-2008 [2995] | do you mean that only accepted proposals by Carl are in the wiki ? i tought that all the ideas could be inserted in the wiki not only those accepted |
BrianH 8-Nov-2008 [2996x3] | Even those haven't been accepted yet. He hasn't even accepted his own ideas - they need more work. |
However, every proposal in the wiki through REVERSE has been reviewed and discussed by Carl and were only added after he liked them. The latter ones were added the next day, based on my own ideas and those of Peter Wood. | |
I have run out of ideas, and am asking for more. Through discussions with Carl I have a pretty good idea about what would be rejected, and what has already been rejected. If you want to make more suggestions, please review the proposals that have been made already in the Parse Proposals wiki and Gabriele's REPs. If your suggestion is covered by something suggested in one of those places you can be sure that they have already been debated to death. If not, I'd love to hear it :) | |
Steeve 8-Nov-2008 [2999x2] | ok i try again a new proposal: ALL [rule1 | rule2 | rule3] each rule must be fullfiled one time but in any order (combinatory). it's equal to [[rule1 rule2 rule3] | [rule1 rule2 ruel3] | [rule2 rule1 rule3] etc...] |
it's not an abstract idea, i had the case in some srcipts | |
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