No more fall through in case statement?

[James Dennett]

bearophile wrote:
> Bill Baxter:
>> I'm no C# guy but that looks like a nice way to fix C's switch.
> 
> I think the C switch is broken in 2 or more ways, so I'd like to see D improve it. This is some code I have shown time ago:
> 
> import std.stdio: writefln;
> void main(string[] args) {
>   switch (args[1]) {
>     int x = 1; // NOT initialized?
>     case "1": writefln("1! x=", x); break;
>     case "2": writefln("2! x=", x); break;
>   }
> }

C++ fixed this some time in the last century, making the code
above ill-formed (diagnostic required) as it skips the initialization
of x.

(It's still UB in C99 so far as I know.)

-- James