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From Jochen Theodorou <>
Subject Re: [CONTRIBUTION]groovy-parser
Date Fri, 30 Sep 2016 10:03:31 GMT

On 30.09.2016 10:03, daniel_sun wrote:
> 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]".

you cannot add statement as an alternative to expression if a expression 
is also a statement. If any statement should be also an expression, then 
statement and expression have to be merged

>      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.

probably, yes

bye Jochen

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