[REBOL] simple parse and copy question Re:
From: joel::neely::fedex::com at: 4-Oct-2000 10:16
Hi, Sharriff...
[Sharriff--Aina--med-iq--de] wrote:
> >> help copy
> USAGE:
> COPY value /part range /deep
>
> considering:
>
> "parse page [thru <title> copy text to </title> ] "
>
> copy is evaluted towars the RIGHT side, copies values into WORD! text
>
> am I to take this as it is? can someone explain exactly why this
> particular example works this way.
>
The answer is that help copy gives you the normal usage of copy as a
word in standard REBOL. However, inside a setting such as
parse something [ ... copy bletch somerulepart ...]
the word copy is used as a part of the parsing dialect. (See the new
docs, chapter 14, for an explanation -- esp. pp. 14-14 and 14-27.) In
that dialect (using the above partial example) the variable following
the word copy receives a copy of whatever matches the following
somerulepart .
The help (or ? variant) function only deals with top-level usage
of words, which is also why you get
>> ? thru
No information on thru (word has no value)
for another word in the parsing dialect.
HTH!
-jn-
--
; Joel Neely [joel--neely--fedex--com] 901-263-4460 38017/HKA/9677
REBOL [] print to-string debase decompress #{
789C0BCE0BAB4A7176CA48CAB53448740FABF474F3720BCC
B6F4F574CFC888342AC949CE74B50500E1710C0C24000000}
