On 04/01/2012 20:01, Pete Cervasio wrote:
On Wednesday, January 04, 2012 01:26:52 pm Martin wrote:
> TForm1 = class(TForm)
> public
> FFoo: TFoo;
> property Num: Integer read FFoo.FBar;
> end;
Just a 'for your info' note: Kylix doesn't allow the above. Nor does
it allow accessing the property FFoo.Bar as a parameter to the read.
This makes sense to me, though, because FFoo may very well be nil when
code tries to read Form1.Num.
Well the property is rejected by fpc too. But then a property is always
treated as if it was a function (or procedure for the setter). So that
is more than referring to a field.
To be honest I discovered this by accident, it was meant to use a field
from a record...
the nil situation is not a concern here, a programmer can always write
code that can fail on nil pointers. FFoo could well have the same live
time as the Form...
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