World: r3wp

tricky :)

>> parse [1 1 1 1] [1 4 1]
== true
>> parse [1 1 1 1] [1 3 1]
== false

Putting numbers in the rule block indicates number of something. 
So [1 4 1] means 1 to 4 times 1.

Easier to see this way:
>> parse [a a a a] [1 4 'a]
== true
>> parse [a a a a] [1 3 'a]
== false

Shouldn't?
parse [1][1] ;== true

So if you wanna check for exactly one time -1, you write [1 1 -1].

Jaime, when you put a number in, it's the start of a min/max indicator. 
You never type max or what to search for, so it fails.

well, apparently numbers are not literals when parsing ...

Same as
>> parse [1] []
== false

must add this to the wikibook :)

>> parse [-1 -1] [2 -1]
== false
>> parse [-1 -1] [2 2 -1]
== true

The first doesn't give meaning to parse, because a number means a 
min, so parse look for a max, and then the data.

A bit consusing. Maybe we should express ranges differently.

Maybe with an issue.

#1-4

Then that needs to be parsed too.
>> i: #1-4
== #1-4
>> i/1
== #"1"
>> i/2
== #"-"
>> i/3
== #"4"
But I could have written:
#001-00004

>> parse [1 1 1] [001 00004 1]
== true

I think, Carl likes to keep it short. :-)

What about a pair for ranges.

Yes, that is better.

literals can help sometimes. But then the problem becomes that pair 
literal could have the same problem than number literal has now.

But then this will give problem:
>> parse [1x2] [1x2]
== true

Yep.

But parse [1][1] ;== false (seems odd).

Maybe rebol needs a literal representation for ranges.

yes, but if you changed min/max to a pair, then
parse [1x2][1x2]
wourld fail.

I understand. I just suggesting that the parse dialect could be further 
optimized.

Or enhanced.

But I guess adding extra syntax still get us in trouble.

I guess block parsing is by datatypes and not Rebol values.

except for words .. hmm... confusing.

But numbers are literals when parsing. It's just that they're syntax 
too, at least in parse rules.

hi all, this is an "old" issue Graham: it is in REP for quite a long 
time

(together with my suggestion how to solve it)

where on REP ?

let me look

One place is this: http://www.compkarori.com/vanilla/display/TO%2C+THRU+And+NOT+PARSE+Rules
, but I think, there was more

then I found this: http://www.rebol.net/list/list-msgs/32392.html

LIT, or LITERAL would be good.

and one more: http://www.fm.vslib.cz/~ladislav/rebol/rep.html

how has Carl responded to these parse suggestions?

he said (a few days ago), that he will arrange for some uninterrupted 
time at the DevCon with me to hear my suggestions, so this is one 
more to remind him

Good.

good :-)

Ladislav - buy Carl some good whisky first ... better chance to succeed 
:-)

does he like whisky? I thought he loved REBOL wine?

hmm, I would have to find some old discussion with Carl, he likes 
whisky but he also suggested some othe drink to me :-)

Buy him some lousy wine so he will feel good that Sassenranch wine 
is so much better :)

:-) No problem with some bad czech wine :-)

buy him some 'burcak', he probably doesn't know, what it is ;)

I think he doesn't even know it is a drink