On Thu, Oct 06, 2005 at 09:24:19PM -0400, Nathanael Nerode wrote: > 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.
That's incorrect. The C++ ABI uses a defined convention for passing by reference, and with a different prototype and some care, or from assembly, you can duplicate the effect. The primary effect of extern "C" is just disabling mangling. -- Daniel Jacobowitz CodeSourcery, LLC -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
