On 20 May 2007, at 16:38, bartek wrote:
OK. And what about this:
-----8<-----
/home/bartek/Dev/units/glgui/glgui.pp(376,33) Error: Can't take the
address of
constant expressions
-----8<-----
constructor TGLGUI3DMouseMapper.Create(aOwnerDesktop: TGLGUIDesktop);
begin
OwnerDesktop:=aOwnerDesktop;
OwnerDesktop.MouseMapper:=self; // 376 is here
end;
-----8<-----
Definition snippet:
-----8<-----
// properties
property OwnerDesktop: TGLGUIDesktop read
fOwnerDesktop write
fOwnerDesktop;
-----8<-----
You cannot write to fields of properties. The reason is that any
property accessor should be transparently replaceable by a function
call, and if you do that in the above expression then your assignment
would change something inside the (temporary) function result rather
than in the field.
Jonas
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