TBevel.Assign procedure
Copies property values from Source to the current class instance.
Declaration
procedure Assign(Source: TPersistent); overrideDescription
Assign copies the contents of
Source to
Self, if the classes of the destination and source classes are
compatible.
The TPersistent implementation of Assign does nothing
but call the AssignTo method for
the source. This means that if the destination class does not know how to
assign the contents of the source class, the source class instance is asked
to assign itself to the destination class. This means that it is necessary to
implement only one of the two methods so that two classes can be assigned to
one another.
In general, a statement of the form:
Destination:=Source;
(where Destination and Source are classes) does not
achieve the same as a statement of the form.
Destination.Assign(Source);
After the former statement, both Source and Destination
will point to the same object. The latter statement will copy the
contents of the Source class to the
Destination class.
See also
An experiment, built from development snapshots. Not the official Free Pascal or Lazarus documentation.