| or_expr:
| expr {}
| | or_expr OR or_expr {}
|
| ...
| ANSWER expr WITH or_expr
Hans is right: this is the kind of grammar transformation you ought to
do if you were using a dumb tool. But do not do that: you are going
to make your grammar much more complex, harder to maintain, and you
will even loose performances.
Just as nobody would ever program a expr/term/factor grammar for
arithmetics in LR, you should avoid the solution above.
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