[PATCH 0/5] keyword driven parsing

[Christopher Li <sparse@chrisli.org>]

Here is an attempt to use keyword driven parsing.

The effect is that, we don't need to keep on adding keyword to
ident-list any more.

It might be marginally faster because it does not do a series
of testing for ident any more. I can't really tell because
sparse is already fast.

It almost remove the usage match_idents(). The only place
for using it now is parse_asm().

BTW, why asm is a statement not an expression? If it is an
expression, it seems make sense to merge the volatile to the
ctype modifiers.

Feel back is welcome.

Chris