On Sun, Jun 13, 2010 at 4:17 PM, Roman Cheplyaka <[email protected]> wrote: > Suppose I have some parser 'p'. I want to parse it as well as get its > span in the text. So I could write > > \begin{code] > pWithLocation = do > loc_start <- getPosition > pval <- p > loc_end <- getPosition > return (pval,loc_start,loc_end) > \end{code} > > except that loc_end gives me the location _after_ 'p'. In case when 'p' > has consumed trailing newline I see no way to recover the end location > of 'p' (it is the last column of the previous line). > > So, can I do anything with this without patching parsec? > > I use parsec3 if it matters. >
Can you use a parser which doesn't consume leading/trailing whitespace? Or somehow layer the parsers so that the whitepsace munching happens outside of parseWithLocation. Antoine _______________________________________________ Haskell-Cafe mailing list [email protected] http://www.haskell.org/mailman/listinfo/haskell-cafe
