On Wed, Oct 11, 2006 at 10:56:39PM +0200, Mehmet Yavuz Selim Soyturk wrote:
> I have rewritten the grammar. There are some problems though.
>
> - I don't know how to express thinks like: an identifier is
> <[a..zA..Z_$]>*, but not a <keyword>. Something like: rule identifier
> {<!keyword><[a..zA..Z_$]>*} seems not to allow identifiers that have
> keywords as prefix.
For now, try adding a \b at the ends of the <keyword> rule:
token keyword { \b [ if | else | for | while | ... ] \b }
Then <keyword> will match only the exact keyword.
However, the "\b" metacharacter is disappearing soon, to be replaced
by <?wb> and <!wb>. In its place will be "<<" and ">>", making
the above:
token keyword { << [ if | else | for | while | ... ] >> }
I'll get << and >> added into PGE today/tomorrow.
> - I couldn't make comments work.
> - I don't know how to handle unicode,
> - How to accomplish semicolon insertion?
I'll have to look at the grammar a bit and see what I can come up
with here.
Pm
