Re: Passing opaque struct between functions/modules

[Sarath Kumar]

On Wednesday, 23 January 2013 at 17:14:31 UTC, Ali Çehreli wrote:
On 01/23/2013 08:33 AM, Sarath Kumar wrote:
> Can someone please tell me the right way to pass an opaque
object
> between module's functions.

I am assuming that you are interfacing with a C library. That 
library must have a D binding file. I am assuming that it is 
your libA.d:


There is also a library that implements the struct and the 
functions. Although you would have it in the C library, here is 
a D module to imitate it:

// libA_impl.d
// These are presumably defined in a C library. Simply 
imitating it with this
// D module
extern (C)
{
    struct Opaque
    {
        int i;
        double d;
    }

    Opaque* getObject()
    {
        return new Opaque(42, 1.5);
    }

    void doSomething(Opaque *)
    {}
}


I don't know the contents of the struct as libA and libB are 3rd 
party C libraries.