Function: smie-bnf--closer-alist

Build a closer-alist from a BNF table.
The return value is in the same form as `smie-closer-alist'.
NO-INNERS if non-nil means that inner keywords will be excluded
from the table, e.g. the table will not include things like ("if" . "else").

(fn BNF &optional NO-INNERS)