On Sat, 7 Nov 2009, Marco van de Voort wrote:
On Sat, Nov 07, 2009 at 01:44:39PM +1000, Alexander Klenin wrote:
1) The change was correct in the sense that all properies should be treated
begin
temp := MyObj.MyIntProperty;
Inc(temp);
MyObj.MyIntProperty := temp;
end;
Of course, if the compiler determines that the property is an alias for a field,
it is free to pass the field directly -- but this is only an optimization.
This is not orthogonal. VAR parameters are generally updated
instantaniously. By delaying the update over a temp variable you break
another aspect of the VAR parameter.
Not to mention the various reference counted objects: strings, interfaces,
open arrays. Unexpected results abound...
Maybe we should put this question in the FAQ.
Michael.
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