A question about C++ interop

[YD]

On Sunday, 29 March 2020 at 01:50:24 UTC, evilrat wrote:
> ...
>
> Same here, STL bindings is not yet finished. If you don't need 
> that method specifically, just replace it with a dummy. Or make 
> your own bindings.

Thanks, dummy placeholder works. But there is a new problem on 
Windows, let's say there are two classes in C++:

     class Y {
         ...
     };
     class X {
     public:
	void call(Y const * y) const;
     };

on Windows, the library file (compiled with Visual C++) contains 
an entry like this:

     16C 00000020 SECT4  notype ()    External     | 
?call at X@@QBEXPBVY@@@Z (public: void __thiscall X::call(class Y 
const *)const )

Then I declare it in D like this:

     extern(C++) {
	class Y {
	    ...
	}
	class X {
	    final void call(const(Y) y) const;
	}
     }

The object file for this D code (compiled with ldc2) will contain 
an entry like this:

     0A7 00000000 UNDEF  notype       External     | 
?call at X@@QBEXQBVY@@@Z (public: void __thiscall X::call(class Y 
const * const)const )

So there is a subtle difference in the signature, and the linker 
refuses to resolve the symbol.

I tried "const Y y", "const(Y*) y", and "ref const(Y) y", but 
none of them manages to match the library file entry.

(This problem somehow does not appear on Linux where the library 
file is compiled with gcc, though)

So what do I need to declare in the D file for it to match the 
library entry? Thanks!