Update gen.zig to produce just enums

[taylorh140]

Changed the gen.zig to produce just enums instead of packed unions.

[taylorh140]

as per @ikskuh's statement. that built-ins remove the need for the packed unions.

[mattnite]

You'll have to change some of the unit tests in addition to the comments I've made thus far.

[taylorh140]

I'm not quite sure where the test are located... yet. Ill find them and get this polished.

[mattnite]

@taylorh140 tests are at the bottom of the file

[taylorh140]

Ok, I think I have the changes you requested. I'm not sure why the build is failing though.

I think I have the test cases aligned but. However i can seem to build zig test. I'll have to see if I added that.

[taylorh140]

It doesnt look like I added it:
regz
zig build test gives:

[mattnite]

@taylorh140 check the generated code, we're failing AST checks. Could be something like a missing curly brace

[taylorh140]

@mattnite Hey it looks like the AST problem is better, I missed removing a closing bracket in the extended cases.

I think that the next thing is maybe updating how some of the items use the packed union as it looks like it's causing some issues. I think i wouldn't mind hunting these down if you don't thing it would be too much of a scope creep for the PR.

[mattnite]

@taylorh140 Yup, a low level API has been changed so now all uses of it need to be updated. I care more about commit atomicity than perceived patch complexity, so to me it's not even scope creep, it's an unfinished part of the task you're trying to do.

[mattnite]

Closing because #328 implements this now that the regz rewrite is complete.