If you can, use
immutable B
x::A
end
The "type" version contains a reference to an A, not the entire A structure
itself. The C analog of what you were doing would be
struct B {
A* x;
};
which of course doesn't have the same size as A.
--Tim
On Wednesday, January 14, 2015 02:22:19 AM Jan Niklas Hasse wrote:
> Hi!
>
> I'm new to Julia and was wondering why
>
> type A
> x::Ptr{Void}
> y::Ptr{Void}
> end
>
> type B
> x::A
> end
>
> assert(sizeof(A) == sizeof(B))
>
> doesn't work while the C version
>
> #include <assert.h>
>
> struct A {
> void* x;
> void* y;
> };
>
> struct B {
> A x;
> };
>
> int main() {
> assert(sizeof(A) == sizeof(B));
> }
>
> does? This causes a segfault in my FreeType.jl wrapper.
