Re: [2/2] groovy git commit: Refine the grammar: 1)`def` is still required for performance when declaring tuple; 2)Stop supporting command expression in parentheses

[Daniel Sun]

It is an enhanced feature introduced by Parrot, but I found it results in
some issues, e.g.
1) `foo(String boo)`
2) multi-assigin issue, e.g. `(X x, Y y)` is parsed as command expression in
parentheses.

Parrot introduces many new features, which impacts performance a lot too...


Cheers,
Daniel.Sun



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