I asked another question about using records with statements. During testing, I discovered an anomaly when two instances of this type seem to use the same memory.
There is an Integer array in the record ...
type
TVersion = record
Values: array of Integer;
function Count: Integer;
class operator implicit(aVersion: TVersion): String;
class operator implicit(aVersion: String): TVersion;
end;
class operator TVersion.implicit(aVersion: TVersion): String;
var
X: Integer;
begin
Result:= '';
for X := 0 to Length(aVersion.Values)-1 do begin
if X > 0 then Result:= Result + '.';
Result:= Result + IntToStr(aVersion.Values[X]);
end;
end;
class operator TVersion.implicit(aVersion: String): TVersion;
var
S, T: String;
I: Integer;
begin
S:= aVersion + '.';
SetLength(Result.Values, 0);
while Length(S) > 0 do begin
I:= Pos('.', S);
T:= Copy(S, 1, I-1);
Delete(S, 1, I);
SetLength(Result.Values, Length(Result.Values)+1);
Result.Values[Length(Result.Values)-1]:= StrToIntDef(T, 0);
end;
end;
function TVersion.Count: Integer;
begin
Result:= Length(Values);
end;
Now I'm trying to implement this ...
var
V1, V2: TVersion;
begin
V1:= '1.2.3.4';
V2:= V1;
ShowMessage(V1);
ShowMessage(V2);
V2.Values[2]:= 8;
ShowMessage(V1);
ShowMessage(V2);
end;
I expect V2to be 1.2.8.4and V1stay 1.2.3.4. However, it V1also changes to 1.2.8.4.
How to save these records independently when I assign them?
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