C++/D interface: exceptions

[David Nadlinger via Digitalmars-d]

On Friday, 12 September 2014 at 00:34:52 UTC, Andrei Alexandrescu 
wrote:
> Making any progress on this is likely to be hard work, so any 
> idea that structures and simplifies the design space would be 
> welcome.

Just a quick comment on this: 2) is very simple to implement for 
all the compilers that actually use libunwind Dwarf 2 EH on 
Linux, i.e. GDC and LDC (I think deadalnix already looked into 
this for SDC).

3) is also doable, but of course significantly more annoying 
because you need to deal with the internals of the exception ABI 
of your C++ compiler. Accessing the exception object is 
relatively trivial, ABI and mangling support is slowly coming 
anyway, but OTOH handling the exception lifetime correctly could 
become somewhat of a headache.

David