Joeish W <joeish80...@yahoo.com> writes:
> This is important to figure out so I thought I'd include the contents
> of my C++ interop.cpp file in a gist
> https://gist.github.com/W-Net-AI/11319737 and my rect.cpp
> W-Net-AI/gist:11319776 you have my Lisp vector class wrappers so here
> is my Lisp rect wrappers...the rect is a little involved for the
> purpose of overloading.
Well, the code for Rect will work. However:
1. Notice that you deal with pointers to Rect's.
2. You do not have a function to free the memory created by the
`new Rect'
3. You really should use the type conversion like I showed you before
if you want to keep your sanity.
Now your problem with the vector<Rect> code boils down to the following
mismatch:
A. The vector deals with instances of Rect NOT pointers to Rect
B. The other code rect code expect pointers to Rect NOT instances of
RECT.
So you have two options:
i. Only deal with pointers to Rect. This means you cannot use
vector<Rect> but have to use vector<Rect*>.
ii. Learn to deal with both. This will require conversion from
Rect <--> Rect*.
Now note, that if you want to keep using vector<Rect> you need to
either:
- Translate the
vector<Rect> --> vector<Rect*> <-> Rect**
on the C-side
- Or do it on the lisp side, but that means that CFFI/Lisp need to know
the size of the Rect instances.
Wim Oudshoorn
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