Re: LPeg and whitespace removal

["Jose Luis Hidalgo" <joseluis.hidalgo@...>]

Hi Joshua,

What about this? :

ws = lpeg.P('*')
sep = lpeg.P(',')
elem = ws^0 * (lpeg.C( (1 - (sep+ws) )^0)) * ws^0
p = elem * (sep * elem)^0



2007/4/12, Joshua Jensen <jjensen@workspacewhiz.com>:
> As my first attempt at using LPeg, I took the Splitting a String example
> and wanted to extend it to filter out whitespace on either side of the
> string.  All whitespace (represented as a visible *) is removed from the
> pattern below except the whitespace at the end.  I understand why it
> doesn't work; I don't understand how to make an elegant fix for it.  I
> tried all kinds of approaches without success.
>
> ws = lpeg.P('*')^0
> sep = ws * lpeg.P(',') * ws
> elem = (lpeg.C((1 - sep)^0))
> p = ws * elem * (sep * elem)^0
> print(p:match('*abcd**,*efgh,***ijklm******'))
>
> Can anyone clue me in?


--
 Jose L. Hidalgo Valiño (PpluX)
 ---- http://www.pplux.com ----