[REBOL]
From: riusa:email:it at: 11-Feb-2002 11:27
Hi all...
I'm studying the "parsing"... wow! it's very powerful!
Now I have a little (!) problem:
I have to parse a string like the following:
SELECT SIZE MODIFIED FROM %/c/filetext.txt
as result, I would produce the size and the last modification time of
the file.
I use the following code:
rule: [
set action-1 ['select | 'insert | 'update | 'delete]
set action-2 ['* | some ['size | 'modified] ]
'from
set dir-1 file!
(
if action-1 = 'select [
either action-2 = '* [
list-dir dir-1
] [;either
if action-2 = 'size [ print size? dir-1 ]
if action-2 = 'modified [ print modified? dir-1 ]
]
]
)
]
the problem is "action-2" holds either "size" or "modified" (not both)
even if the user insert both of them.
What can I do to iterate to discover all the data inserted
(discover "size" and "modified" options, and print all the data that
the user requested).
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