[swift-users] Importing Empty C Structs

[Joe Groff]

> On Feb 15, 2016, at 10:05 AM, Jordan Rose via swift-users <swift-users at swift.org> wrote:
> 
> The main reason we don't do this today is that in the REPL you might import the definition later, and then you can't update the existing type. We definitely need a better story here, though.

This could also potentially happen in a standalone executable image, which might have been compiled with the opaque declaration and then dlopen a dylib with the full definition. We'd want Swift's runtime metadata for the C type to converge on the full definition when it's available.

-Joe