Support C++ inheritance about clang.jl HOT 5 CLOSED

Hmm. On second look I think it may be necessary to use concrete types that encapsulate the pointer.
https://gist.github.com/ihnorton/e694b87a86ee19e4f75a#file-ptrdispatch2-jl

Might be a performance hit, but don't worry about that for now.

from clang.jl.

Reading the friendly manual more closely gives a solution (Methods, bottom). Make the pointer type a method parameter and this plan should work perfectly:
https://gist.github.com/ihnorton/e694b87a86ee19e4f75a#file-ptrdispatch3-jl

from clang.jl.

Here is a hacky but potentially tractable idea to simulate multiple inheritance: use Union of pointer types.
https://gist.github.com/ihnorton/e694b87a86ee19e4f75a#file-ptrdispatch4-jl

(The problem here is that it requires listing each possible subclass in the Union. However, this might be best anyway because it could allow correct thunking)

from clang.jl.

Closed in 692e9ed0

from clang.jl.

Here is an idea how to support basic C++ multiple inheritance with multiple-dispatch

class A
class B

class M < { A,B }

in julia

define M <: A
all A meth(A, ...) apply as usual

define M_b <: M
implement aliases for all B functions, which do the thunk and call meth(B, ...)

from clang.jl.