* Jürg Billeter wrote, On 23/07/08 10:40: > On Thu, 2008-06-26 at 15:09 +0100, Sam Liddicott wrote: > >> We see that the last function (above) has the arguments the wrong way >> around because I had removed the instance_pos. >> >> But in fact it is only the entry method that needs to take into account >> instance_pos when ordering it's declared arguments. >> The inner "real" methods can be "normal" without any strange calling >> conventions, and the entry dispatching method could "know" this. >> >> And so I'm really suggesting that for virtual methods, instance_pos only >> apply to the wrapper and not to the real functions at all. >> It would then be illegal to specify instance_pos on override methods, >> only on virtual methods. >> > > It depends on the use case. For your example, it would certainly make > sense to only change the wrapper, however, in other cases, it might be > necessary to apply the attribute to both, the wrapper and the real > function, to be compatible with existing libraries. > For my own edification, can you think of a case where existing libraries can get or give a reference to the real function (rather than just the wrapper)?
My lack of understanding of the glib baggage is a handicap to my work for virtual vapi classes, and this knowledge could help my understanding. Sam
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