Alexander Klenin schrieb:
Using temporary variables, there will be one call to each.
Where would you place such temporary variables, in your sample code? Into an
invisible layer between the caller and MyInc2?
Eh... on the stack, as usual. I am not sure what do you mean by
"invisible layer".
The var parameter already resides on the stack, when the procedure is
invoked. Given that a var parameter is represented by a memory address,
what should that address point to?
[1] A quick comparison with Delphi 7 revealed:
Delphi notices that a property cannot be passed as a var parameter.
Delphi also denies Inc(obj.P), so that I have to adjust my opinion about the
cleverness of Inc() :-(
[What does not influence my opinion about the *expected* behaviour of Inc()
:-]
Yes, passing property as var parameter. if implemented, would be a
FPC-only extension.
I'm pretty sure that such a feature will never come. It would be easier
to implement macros with arguments, or generics, that allow for similar
comfort in a more transparent way.
DoDi
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