Sure, but I was thinking more of how C++ calling conventions typically tend to follow C calling conventions on a given architecture, so AIUI you'd either have t

Sure, but I was thinking more of how C++ calling conventions typically tend to follow C calling conventions on a given architecture, so AIUI you'd either have to have a differentish calling convention or inefficiently require callees to make copies of already copied objects. Not that there's anything intrinsically wrong with having a differentish calling convention for C and C++ - it'd just add a smidgen more complexity is all.