"macro" expansion to build switch case code

[nbdusr]

On Sunday, 2 July 2023 at 17:02:44 UTC, Paul wrote:
> I have a struct similar to the following example.  I'd like to 
> build an adder method without having to code the whole method.  
> How do I use the D language to do this?  Template, mixins, 
> CTFE..all of them?
>
> ```d
> struct myS {
>     int a, b, c, d, e, f, g, h, i;
>     adder(string s, int n) {
>         final switch (s) {
>             case "aa" :
>                 a += n; break;
>             case "bb" :
>                 b += n; break;
>            ...
> ```
> Thanks for any assistance.

https://forum.dlang.org/post/rqgvruwgrldklarablii@forum.dlang.org