World: r3wp
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BrianH 31-Mar-2009 [3393] | Even my compromise has been rejected as too slow. Use TRANSCODE/error in a loop if necessary, but otherwise come to accept that LOAD loads REBOL data, and whatever DECODE can load (which is *anything* in theory). |
btiffin 31-Mar-2009 [3394] | Anton ... it's not (I don't think, but I guess it could be) lack of comprehension. It's a desire to see REBOL usefulness expand beyond the borders of us 200 loyal fans. >> book: load %somefile >> sort book >> length? unique book etc... Can you not see a linguist loving this? And perhaps adding to the size of the REBOL user base? >> account: [paid $10,000.00 to bob] A general contractor would love to type that in. It just seems so close to being a thing that could be done without too much fuss or bother if it was internal. Everyone here in REBOL3 ... we could make REBOL "more" restrictive and magic would still happen. Carl and we advocates don't have to worry about you/us lot. We're hooked already. For instance. What if ``\\ was made a special! datatype? Would you complain? Or just accept it as a new feature of REBOL? I don't see what a catch-all foreign! would harm. The lexical complexity of REBOL is wonderous, I don't see what could hurt if it was more human friendly to boot. Pekr ... I grew up a commercial fisherman. ;) |
BrianH 31-Mar-2009 [3395x3] | As someone who writes some of the internals, I can tell you that internalizing the fuss and bother doesn't make it less bothersome. It's not magic: The overhead would be the same if we added it to TRANSCODE - we might as well write the REBOL syntax in PARSE. |
Flexibility is slow. If you want to load another syntax, try something like this: install-codec fishing-jargon load %blah.fish | |
Theoretical functions of course, but LOAD will call DECODE, which will look for an installed codec that it passes the data to. | |
btiffin 31-Mar-2009 [3398] | Before I read this I was going to add ... Feeling a little bit responsible for being this argument to the rebol community, in a small attempt to advocate for more users ... I'd also like to say, that push come to shove; if the argument gets to a point of driving away the likes of Nenad, or Gabriele in some sense of disgust at the un-understanding of some of us versus the potential of a few thousand new faceless strangers that may be attracted to a "garbage loading dialect" language. I'd vote to keep Doc and Gab happy and skip the faceless masses. ;) |
BrianH 31-Mar-2009 [3399] | Check out TRANSCODE/error. |
btiffin 31-Mar-2009 [3400] | But ... I still don't see the performance hit of a lexical scanner that defaulted to "make foreign!" and continue whenever a position in the code would trigger a syntax error? Or as Anton states ... is this an amazing lack of comprehension? I've been working with Bison and Flex ... and from what I understand, this would not make the parse tree any more complex. It would simply change the runtime semantics to "make foreign!" at every point where the scanner would fail. |
BrianH 31-Mar-2009 [3401x2] | We want that failure in LOAD though - it's what makes it trustworthy and fast. Check out TRANSCODE/error, but keep in mind that code to cope with foreign data is much more complex than regular code. Beginners should stick to REBOL data. |
Or to data loaded by codecs called by DECODE. | |
btiffin 31-Mar-2009 [3403] | Again ... I'll side with Doc, push come to shove ... but ... it can't be more complex than throwing a runtime error in an action! when given invalid datatypes, no? foreign! on action! or evaluation would trigger a throw. The only operation I'd allow is to string! or a test such as foreign? But I'll now try and hold my tongue for another 2 months. ;) |
Izkata 31-Mar-2009 [3404] | In regards to my "Why not load as a string! ?" comment, I was thinking of some sort of load/safe refinement |
BrianH 31-Mar-2009 [3405x3] | LOAD is safe already. The fact that it throws an error on bad data is what makes it safe. |
We changed it to be even more strict in R3 to make it even safer. | |
The "more strict" is making LOAD/header actually require a REBOL script, if not the header itself. | |
Graham 31-Mar-2009 [3408] | I haven't followed this thread |
btiffin 31-Mar-2009 [3409] | Ok, fine two minutes then. ;) "bad data" would be a new foreign! datatype. No longer "bad". It'd be no more a code hassle than doing email! + url! Take the hit then. But you still have a "valid REBOL series!" to play with. Even with a $$10,000.00\\ floating around in the series ... semantically equivalent to email! or file! out of context for those functions that require particular datums. |
Graham 31-Mar-2009 [3410x4] | but usually you want to parse data knowing what datatypes you are expecting. |
would it be possible to do a to-block on that data accepting only certain datatypes and anything else is coerced to string? | |
eg telephone numbers are recognized as invalid time values | |
>> to-block " 345-6789 " ** Syntax Error: Invalid date -- 345-6789 ** Near: (line 1) 345-6789 >> | |
BrianH 31-Mar-2009 [3414] | Foreign data will have codecs. No need to try to treat it like REBOL data. The foreign! type is the worst possible situation, since it would take the overhead of dealing with foreign data away from the actual input proces, and add that overhead to every bit of REBOL code that called LOAD, because LOAD would no longer be trustworthy. |
Graham 31-Mar-2009 [3415x2] | or perhaps rebol by adding a telephone number data type |
fix rebol | |
BrianH 31-Mar-2009 [3417] | Right now you can count on LOAD returning REBOL data, or an error. This is what makes LOAD trustworthy enough for DO. |
Graham 31-Mar-2009 [3418] | seems a significant omission ... |
BrianH 31-Mar-2009 [3419] | Really? Do you mean #1-773-555-1212 ? |
Graham 31-Mar-2009 [3420] | how many times do you see phone numbers like that in real data ? |
BrianH 31-Mar-2009 [3421] | In REBOL data, plenty. I thought we were talking about LOAD, not input processing. |
Graham 31-Mar-2009 [3422] | to block is clearly evaluating |
BrianH 31-Mar-2009 [3423x3] | Processing UTF-8 to parse REBOL data, yes. |
I say UTF-8 because this is R3 LOAD we are talking about - R2's LOAD won't change again. | |
Listen, we had this discussion before and the compromise endied up being TRANSCODE/error (added in alpha 39). | |
Graham 31-Mar-2009 [3426x3] | Is the r3 group? |
this | |
didn't know that | |
Anton 31-Mar-2009 [3429] | Yes, I've noticed the same arguments put forward as before. |
Graham 31-Mar-2009 [3430] | Oh well, we need a FAQ then ! |
BrianH 31-Mar-2009 [3431] | This discussion pertains to R3, since it is a request for changes to REBOL. R2 isn't changing. |
btiffin 31-Mar-2009 [3432] | I'll do the same thing in another 2 months or so ... It's a new quirk of mine Anton. ;) I'll continue to do so until the kids on compsci.ca see REBOL as a worthy thing to study, instead of writing it off with comments like "I can't stand the syntax". |
Anton 31-Mar-2009 [3433] | That gets really tiresome. |
Graham 31-Mar-2009 [3434x2] | someone will accuse you of trolling |
some of us just have short memories! | |
BrianH 31-Mar-2009 [3436x2] | No Brian, you won't because Carl already made the change in alpha 39, and is currently writing DECODE. |
Even my compromise from the last time you brought this up was rejected. TRANSCODE/error and codecs is what we got. Live with it. | |
btiffin 31-Mar-2009 [3438] | I'm doing it with well meaning intent. I really do struggle trying to get young up and coming university students to give REBOL the chance I know it deserves. And sorry Brian, I've haven't tried A39 yet. I'm still running the A33 for Linux. |
BrianH 31-Mar-2009 [3439x3] | Well, I already rewrote LOAD to take advantage of the TRANSCODE changes. It should go in the next build. |
This includes LOAD/next, btw. | |
Like LOAD/header, it is better than R2 :) | |
btiffin 1-Apr-2009 [3442] | This is very cool news ... I'll crank up wine again on an a40.exe to see ... time to catch up with recent developments again. |
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