Hi Sergei,
I tried to add the statement to expression as an alternative, the
antlr4 failed to generate sources becuase of the error "error(119):
GroovyParser.g4::: The following sets of rules are mutually left-recursive
[statement, expression, statementExpression]".
Currenty the expression is quite huge, which is a potential cause of
performance issue. so if we try our best to treat statement as expression in
the future, the performance will be impacted somehow.
Cheers,
Daniel.Sun
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