On Sun, Oct 11, 2009 at 3:05 PM, Matt <[email protected]> wrote:
> In C++ I see a lot of defining an enum, struct, or other values before
> #including another header which then uses these values. I understand why this
> works in C++, but does the same thing work in D? I'd assume not, since the
> import mechanism is a little more advanced than C++'s "copy this file into
> this location".
Not.. really. If module A imports module B, B does not see A's symbols at all.
Howeeeeever, it's possible to use mixins of various types to emulate
this. For instance, module B could define all of its members inside a
template, like so:
----
module B;
template BMembers()
{
some declarations
more declarations
}
----
Then in module A:
----
module A;
import B;
// define structs and stuff
mixin BMembers; // mixes in B's definitions into A, and they use A's symbols
----
You could also use the 'mixin(import("somefile"))' idiom at module
scope in A, but that's a bit hacky, and won't get you as decent error
messages.
