On Wednesday, 25 December 2024 at 17:20:01 UTC, user1234 wrote:
On Wednesday, 25 December 2024 at 16:41:05 UTC, sfp wrote:
On Wednesday, 25 December 2024 at 07:57:04 UTC, monkyyy wrote:
static foreach, traits and mixin
I was looking into this but I think I need some help getting
off the ground...
This doesn't compile:
```
enum Test { mixin("A, B, C") }
```
Mixins can only introduce certain type of nodes: Type,
Declaration, Expression, and Statement. Honestly I dont see how
would they help here... What you can do however is to use
https://dlang.org/phobos/std_sumtype.html. instead of a the
manually defined tagged union.
Unfortunately, std.sumtype doesn't seem to work for my case. I
want to be able to define several mutually recursive types. It
seems the only way to define a recursive type using std.sumtype
is the `This` parameter. For instance, this doesn't work:
```
alias Blah = SumType!(A);
struct A { Blah *b; }
```
Throws an error about recursive template expansion or something.
