[REBOL] Re: Using BREAK keyword
From: rotenca:telvia:it at: 21-Sep-2003 8:35
Hi Brett,
> to use the Break keyword of Parse so that I could add it as a comparison.
> Unfortunately I wasn't sure of how to do it to give the same results.
> Any ideas?
[end skip] and [break] are not the same.
The first fails the second breaks.
Examples:
parse "a" [some [break] "a"] ;== true
'some halts, but not fails.
parse "a" [some [end skip] "a"] ; == false
'some halts, because it fails.
With 'any, the difference cannot be detected, because its result is alway
positive, also if the rule fails.
parse "a" [any [end skip] "a"] ; == true
parse "a" [any [break] "a"] ;== true
There is little difference between break in parse and break in a cycle like
this:
forever [
break
]
It only breaks the cycle without changing its result.
---
Ciao
Romano
