Calling operator [] within a class?
Author
I have a base class CTree, that exports the operator [] to give access to the children. I''d like a derived class to be able to access the children to call a member on each child.
I tried what seems intuitive but it failed:
*this.Process(Event);
and this
(*this[m_i])->Process(Event);
Any idea on how to refer to the [] operator of your own class?
Many thanks
Chris
Chris Brodie
http:\\fourth.flipcode.com
It should be possible to call the operator [] method directly:
However,
should work, too.
Sorry, can''t verify it at the moment.
operator[] (nIndex).DoSomething (); However,
(*this)[nIndex].DoSomething (); should work, too.
Sorry, can''t verify it at the moment.
It would be helpful to know what error you are getting, but I think (from past experiences) that it is an operation priority issue.
You have: (*this[m_i])->Process(Event);
Which means that it tries to get the m_i item from the pointer ''this'' and dereference the result.. then call Process with a pointer accessor.
What you are trying to do is dereference a pointer as to get the container object, get the m_i item from it, and call Process on it: (*this)[m_i].Process(Event).
You can always cheat and take the functionality of operator [] out and put it into a method like GetNodeAtIndex. Have operator [] call GetNodeAtIndex, and you can just call that too within the class: GetNodeAtIndex(m_i).Process(Event)... but then again, it''s not as nice
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You have: (*this[m_i])->Process(Event);
Which means that it tries to get the m_i item from the pointer ''this'' and dereference the result.. then call Process with a pointer accessor.
What you are trying to do is dereference a pointer as to get the container object, get the m_i item from it, and call Process on it: (*this)[m_i].Process(Event).
You can always cheat and take the functionality of operator [] out and put it into a method like GetNodeAtIndex. Have operator [] call GetNodeAtIndex, and you can just call that too within the class: GetNodeAtIndex(m_i).Process(Event)... but then again, it''s not as nice
---
PAGE FAULT: Please insert "Swap File, Disk 2"
and press any key to continue.
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