No more fall through in case statement?

[Bill Baxter]

James Dennett wrote:
> 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.)

That's actually in the spec?  Cool.  I thought it was just a QOI thing.

--bb