"macro" expansion to build switch case code

[Paul]

On Sunday, 2 July 2023 at 20:27:47 UTC, Steven Schveighoffer 
wrote:
> On 7/2/23 1:02 PM, Paul wrote:
>> [...]
>
> Use a static foreach:
>
> ```d
> import std.traits; // for FieldNameTuple. there are other ways, 
> but this is the most straightforward
> switchlabel: // this is needed for break inside a static foreach
> final switch(s) {
>    static foreach(mem; FieldNameTuple!myS) {
>      case mem ~ mem:
>         __traits(getMember, this, mem) += n;
>         break switchalbel;
>    }
> }
> ```
>
> -Steve

Perfect.  Thanks Steve!