[Issue 14728] Problems in the switch statement with enumerated data types

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=14728

--- Comment #2 from dennis.m.ritchie at mail.ru ---
(In reply to Vladimir Panteleev from comment #1)
> Here "," is the comma operator, which works as in C (i.e. the first
> expression is evaluated but its result is discarded). It is the same
> situation as e.g.
> 
> if (x, y) { ... }
> 
> The compiler should probably warn that the expression "x" has no side
> effects.

Yes, probably, it would be nice if the compiler warns about this.

But I see the second problem. Why is it compiled?

int x = 1;
int y = 2;

but it is not compiled into a switch statement? 
I think that this option should also be compiled:

int x = 1;
long y = 2;

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