Using enum constant from different modules

[anonymous via Digitalmars-d-learn]

On Thursday, 10 July 2014 at 20:27:39 UTC, Jacob Carlborg wrote:
> Here's a code example:
>
> module main;
>
> import foo;
>
> enum Get = "GET";
>
> void bar (string a)
> {
>     assert(a is Get);
> }
>
> void main ()
> {
>     asd();
> }
>
> module foo;
>
> import main;
>
> void asd()
> {
>     bar(Get);
> }
>
> Running the above code will cause an assert error in the 
> function "bar". But if I move the function "asd" into the 
> "main" module and completely skip the "foo" module the assert 
> passes.
>
> I don't know if I'm thinking completely wrong here but this 
> seems like a bug to me.

I don't think this is a bug.

Remember that enums have copy-paste semantics. So, this is the
same as comparing literals from different modules. Apparently, in
the same module, a duplicate string literal is optimized out. But
that's not done across the module boundary. I'd guess that's
because of the separate compilation model.