[switch] Further unification on switch

[Brian Goetz]

>
> Can a single-statement case have a variable declaration as that 
> statement, and what would be its scope?

No, a local variable declaration is a BlockStatement (JLS 14.2), not a 
Statement (JLS 14.5).  So you could say:

     case FOO -> println(3);

or

     case FOO -> {
         int x = 4;
         println(x);
     }

Of course, you don't have to ask about the scope of x.


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