Brian Carlson wrote: >> You must not pass by reference with an extern "C" declaration, because C >> doesn't support that. Dan Jacobowitz wrote: >Why not? An extern C definition doesn't mean that it needs to be >usable from C. It just means to use the C calling convention. Perhaps because there is no C calling convention for passing by reference? How to pass arguments is part of the calling convention. :-P You can pass C++-only objects, certainly, but you have to be able to pass them in a way which is understood in the C calling convention.
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