Re: Virtual function calls at compile time
Francis Glassborow ha scritto:
When you pass a polymorphic type by value the compiler is not only free
to statically bind calls to its member functions but usually will (it
would need a degree of perversity from the implementor to insist on a
virtual call. Actually I am not certain without going back to the
Standard whether making the call virtual is non-conforming in such a case)
5.2.2/1 says: "if that function is virtual and is not specified using a
qualified-id then the function actually called will be the final
overrider (10.3) of the selected function in the dynamic type of the
object expression."
The wording seems to be carefully written in order to specify the effect
and not how such effect shall be obtained. There is actually no concept
in of "virtual call" or "static call". The standard simply specifies
which function shall be called and how the compiler is supposed to
select the correct is an implementation detail that is left unspecified.
All in all, the selection process itself is not part of the observable
behaviour...
HTH,
Ganesh
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