World: r3wp

Graham, it seems the file commands are saved for elsewhere in rebdev, 
so he won't use them here.

PeterWood, report DevBase bugs in the !DevBase group here. There 
is no CureCode area for DevBase. Keep in mind:

- The current DevBase will be replaced soon. RebDev is a code name 
for the next DevBase.

- DevBase may be more updated than you think. Ask more in the !DevBase 
group.

Steeve, to-block is used in a lot of code to *copy* and/or convert 
to blocks. We depend on the copying behavior a lot.

Particularly in the mezzanines :)

I think he is saying that if the value is already a block why copy 
it.

I would love a separate function called AS-BLOCK that does convert 
if necessary else pass on. Maybe an AS native with a ton of wrappers, 
just like TO. That would solve the problem without losing the existing 
behavior.

now your talking....

BrianH, keep Steeve in mind if you get openings for more programmers 
in developement of R3.

I love the idea, just not changing TO :)

He has some pretty good experience.

That is clear :)

That is the whole point to the releases. We are getting ready for 
more developers :)

Cool

Temporary UI weirdness aside, it is really cool to have a chat client 
for REBOL right there *in* REBOL :)

I find out when it gets released.

ok Brian push the 'as development as far as you can, it will improve 
many mezzanines

*pull is better

Brian, what's R3's memory footprint cf R2 ?

for similar applications?

to-string does the same oas to-block.  even I have come to depend 
on the copying aspects of it, and I can assume that many others do 
to.

one question I have... does the object type also copy every series 
included like in R2 ?  that, IMHO one of the biggest regressions 
in rebol's history.   reversing the copy is impossible to do perfectly 
(scanning the new object, and attempting to link back the old series). 
plus it slows down rebol in a few ways.

I'll check. It should just do a bind/copy, not a copy/deep.

MAKE object should just copy blocks, parens and functions - those 
are what can be bound. It shouldn't copy anything else.

Maxim, there is 'as-string ...

well, for R2

...not working with anything else than binaries though...

That is why I suggested AS and AS-* functions, Graham. The AS-* functions 
in R2 won't work in R3, but something non-aliasing would..

Perhaps it's moment for Brian to add a page in the wiki...

to do the same work he did on parse evolution

After some discussion in the appropriate area first. The wiki is 
for results of discussions, not the discussions themselves.

do that then...

(it's not an order just a request)

Any change to get a CONTINUE function in R3?

>> continue
** Throw error: No loop to continue

This what you want?

yeah is that in R3?

yes, I have it in latest alpha here:

>> ? continue
USAGE:
        CONTINUE

DESCRIPTION:
        Throws control back to top of loop.
        CONTINUE is a native value.

Excellent!  We needed that.

goodie :-)

You know what it does right?

It allows you to skip the rest of a while loop for example when the 
conditions are met.

This means far less evaluation is needed in your loops.

If you need to, you can fake it in r2 with loop 1 [...break ...]
R3 ---  for n 1 5 1 [print n continue print "not printed"]
R2 ---  for n 1 5 1 [loop 1 [print n  break print "not printed"]]

A continue should skip the rest of a loop cycle and advance the loop 
to the next cycle based on the condition of the loop.  This means 
it is far more efficient than our current methods.

Break doesn't initiate the next cycle of the loop.

Yes Sundanda, your second method would do the trick but then your 
also introducing evaluation.  So you gotta be careful you not introducing 
more evaulation than your saving.

You may be disappointed in continue then.....At least in the current 
alpha some evaluation takes place.
     R3 ---  for n 1 5 1 [print n continue xxx: 999]
     R2 ---  for n 1 5 1 [loop 1 [print n  break xxx: 999]]
Both R2 and R3 end up with xxx as an unset word in system/words

Sunanda try profiling the R3 version with and without the xxx word 
and see if there is a speed difference. If not, then the word appears 
due to binding on first use of the block.

Not really evaulation as much as type checking possibly.  Even the 
following will add to the system/words:

>> loop 1 [break blah: 1]
>> find first system/words 'blah
== [blah]

I think system/words is similiar to a string table as found in other 
languages with respect to literals.

CONTINUE has the same overhead as BREAK, EXIT and RETURN, so be sure 
to factor that in in your performance calculations.