fat struct style guide?

[Julian Fondren]

On Tuesday, 24 February 2026 at 19:01:35 UTC, monkyyy wrote:
> Consider the `old` function, a tagged union would add a layer 
> of indirection that does nothing.

```d
enum animalid{cow=7,chicken,horse};

struct animal{
     animalid id;
     string say;
     int age;
}
```

This is a tagged union. Both the D and the Nim that I posted have 
a check against the tag that's technically unnecessary, but what 
you're doing here is like saying that you don't want to use 
arrays "because array indexing comes with an array bounds check 
and that slows down access".