How to correctly generate enums at compile time.

[jkpl via Digitalmars-d-learn]

On Sunday, 30 April 2017 at 20:05:59 UTC, Kevin Balbas wrote:
> I've got the following code snippet, which almost does what I 
> want.
>
> struct TaggedType {}
>
> @TaggedType
> struct Foo {}
>
> @TaggedType
> struct Bar {}
>
> string GenerateTypeEnum()
> {
>     string enumString = "enum TypeEnum {";
>     foreach (name; __traits(allMembers, mixin(__MODULE__)))
>     {
>         import std.traits;
>         static if (hasUDA!(mixin(name), TaggedType))
>         {
>             enumString ~= name;
>             enumString ~= "Type,";
>         }
>     }
>     enumString ~= "}";
>     return enumString;
> }
>
> // generates enum TypeEnum {FooType,BarType,}
> mixin(GenerateTypeEnum());
>
> This works great, except that TypeEnum isn't accessible from 
> other modules (undefined identifier 'TypeEnum'), which is kind 
> of the point of doing this (I'm using the enum as a system-wide 
> tag for inter-thread communication).  I can imagine why this 
> would be the case, but it's a pretty serious problem.  Is there 
> a way to do this?

if i put your sniped in b.d and import in a.d b then i'm able to 
access TypeEnum.
You r problem must be something stupid that's not related to 
UDA/mixins.

That leads to this question (sorry) but at least do you import 
the module that contains TypeEnum ?