Java.g4 repeated modifier ?

[JuanTanamera]

Is it intentional that the grammar accepts constructs such as

public public void myMethod() { }

where a modifier is repeated?

[parrt]

yes, there is always a trade-off between trying to enforce too much in syntax versus later with semantic checking. Is very challenging to match one of several elements but at most one using syntax. Often implies delineating all possible combinations.

[JuanTanamera]

Thanks, I suspected it might be on purpose, but as I am totally new to this it's good to know why. I thought briefly about how it might be fixed but also thought it might be hard!