[Mono-list] C#->C->C++, Platform Invocations from HELL!

Dallman, John jgd at ugs.com
Mon Dec 11 05:31:38 EST 2006

Tyler Ballance wrote: 

> I'm wondering if it is a plausible option to wrap the C++ shared
libraries with a C 
> library, which would then be wrapped by the C# platform invocation
> that I'd write, much in the same manner Mac OS X APIs perform
toll-free bridging 
> between ObjC and C

> The most I have to worry about really in the context of C++ specific
code is sick 
> iterator hacks and exceptions, but I don't think it isn't anything
that can't be wrapped 
> by a simpleton C wrapper to provide a good p/invoke shim for Mono.

> Am I stretching too far?
Just about far enough, actually. I've only looked into this on Windows
MS.NET, but there, the object models for C# and native C++ have nothing 
to do with each other, and C# cannot call native C++ object member 
functions. A C wrapper layer is the only practical solution there, and I

suspect the same will hold on Mono. This just confirmed my opinion that 
C++ may be a nice language for coding, but the complexity and fragility 
of its interfaces disqualify it for APIs. 

John Dallman, Parasolid Porting Engineer, +44-1223-371554 

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