bug#16966: [PATCH] grep: optimization with the superset of DFA

[Norihiro Tanaka]

Hi Paulo,

> For ANYCHAR, you can convert it to CSET{1,mb_cur_max} or, even better, 
> (single-CSET | lead-CSET full-CSET{0,mb_cur_max-1}).

I seem that it's complicated.  The superset requires a memory area that
is different from the original DFA and additional costs to build it.  And
exact matching isn't required for it.  So, I want to make it simple and
smaller DFA.

Do you know how to code ANYCHAR correctly in a simple method? 

Norihiro