Re: constructing labels for static foreach inside switch inside foreach

[bauss via Digitalmars-d-learn]

On Wednesday, 8 July 2020 at 02:06:01 UTC, Steven Schveighoffer 
wrote:
OK, so I have a situation where I'm foreaching over a 
compile-time list of types. Inside the loop, I'm using a second 
loop over a set of input.

Inside that loop, I'm using a switch on the input, and inside 
the switch, I'm foreaching over the type's members, to 
construct a switch that can handle member names (this is for 
serialization).

If I encounter a certain name, then I want to break out of the 
inner loop (it's a while loop)

So naturally, I have to use break statements with labels like:

innerloop:
while(haveMoreData)
   switchstmt:
   switch(nextDataElement) {
      static foreach(name; __traits(allMembers, T)) {
      case name:
         ... // handle it
         break switchstmt;
      }
      case "STOP":
         break innerloop;
   }

Seems simple enough, except that this inner portion is 
unrolled, and if I have more than one type to run this on, I 
already have an "innerloop" label defined.

Is there a way to define a label using a mixin or something? or 
do I have to wrap this in a function?

Is there another way to approach this?

-Steve

Unfortunately mixin does not support labels so I don't think you 
can do what you want to do.

Kind of surprised me tbh