On Saturday, 14 February 2015 at 17:24:51 UTC, Guillaume Chatelet
wrote:
I did a few tests. Using a class doesn't work because of the
added vptr.
The data would be managed at the same time on the D and the C++
side.
Structs work however because we can add something like this :
struct std_string {
void[8] _ = void; // to match sizeof(std::string) and pad the
object correctly.
}
The padding will be left untouched on the D side because of
void initializer and will be managed entirely on the C++ side.
Using a class crashes (C++ and D step on each others toes).
Structs work expect for :
- name mangling on linux (bug reported in my first message)
- name mangling on Windows at least (name would be mangled as a
struct instead of class)
- disabled default constructor.
Mangling on Linux is fixable as well as default construction :
we can provide a special function that would create a new
instance.
But for the windows name mangling, I don't see a way out in the
language as it is right now.
Any ideas ?
I'm also using pragma(mangle) and struct with a fake virtual
table...
;-(
I think that another problem is that, if you use a class in D
instead of a struct, it's a mess with C++ functions taking a
reference:
D - class vector .....
C++ - foo(const vector& a) ...
C++ - foo(const vector* a) ...
How do we specify the right mangling for the reference?
---
/P
