Log In
Register
Forum
Topic RSS
12:26, EEST
October 27, 2014
Offline
Hi,
Just a doubt with the C++ copy operator. Is it correct to use it?
For example if I want to create the same object in a different piece of memory like this:
TPsBool tag = new TPsBool(NULL);
tag->OnChange = onChangeRoutine;
TPsBool tag2 = new TPsBool(NULL);
*tag2 = *tag;
And this piece of code results in 2 TPsBool objects with differents pointers and the same properties, methods and events. Is that right?
Best regards!!!
13:57, EEST
December 21, 2011
Offline
Must admit that I haven’t used C++ enough to say for sure, but I don’t think this works as expected.
The Delphi classes have the Assign() method, instead, which you can use to make a deep copy of the objects – also in C++.
17:19, EEST
October 27, 2014
Offline
So the correct code must be:
TPsBool tag = new TPsBool(NULL);
tag->OnChange = onChangeRoutine;
TPsBool tag2 = new TPsBool(NULL);
tag2->Assign(tag);
Does Assign copies also the events configured in the source?
10:03, EEST
December 21, 2011
Offline
No, it only copies the “Variable Properties”. This is the full implementation:
begin
if Source is TPsVar then
CopyProps([vpValue..vpOther2], TPsVar(Source))
else
inherited Assign(Source);
end;
1 Guest(s)
