on interfacing w/C++

[Daniel Murphy via Digitalmars-d]

"Moritz Maxeiner"  wrote in message 
news:nadswyordziiiixwaywi at forum.dlang.org...

> That sounds very cool, I've had a look at [1] and [2], which seem to be 
> the two files with the new C++ class interfacing. As far as I could tell, 
> you need to create any instances of C++ classes with C++ code / you don't 
> bind to the constructors directly from D and the new instance will not be 
> managed by D's GC? Because if I used this new interfacing for e.g. llvm-d, 
> I need to be sure, that D's GC won't touch any of the instances under any 
> circumstances, since they are freed by LLVM's internal logic they GC 
> cannot track.

This is correct, if you want to construct a class implemented in C++ you 
will need to call a factory function also implemented in C++, and the same 
for the other direction.

If you are using 'new' in C++ it will not use D's GC heap, unless you 
overrode the global 'new' operator or something.

The simplest model is to do all lifetime management in the original language 
and ensure that objects stay alive while there are live references in the 
other language.