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How do I get my parser atom to terminate inside a rule including optional spaces?


The subexpression rule should first try to match the bool_operation rule before moving to value.

rule(:subexpression) {(bool_operation |
value).repeat(1)}

Also, you need to tag the values in bool_operation so that they don't get incorrectly merged.

rule(:bool_operation) {
value.as(:first) >> bool_comparison >>
value.as(:second) }

Categories : Ruby

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