gcc 4.5.3
gdb 4.5.3
IDE Netbeans 7.2
I've got a little problem with my override of operator=, to wit;
A little code snippet:
[code]
SlipHeader* header = new (construct a list);
SlipHeader& splitHeader = header->splitLeft(*cellPtr[DATASIZE/2]);
splitHeader = &(header->splitLeft(*cellPtr[DATASIZE/2 + 1]));
[/code]
class architecture:
class SlipCellBase
class SlipCell : public SlipCellBase
class SlipHeader: public SlipCell
The initial allocation and assignment works correctly. The rhs of the second use
of splitHeader works fine. Problems develop when the equal sign is evaluated.
What happens is:
1: Space is allocated on the stack (OK).
2: The SlipCellBase constructor is called "SlipCellBase() { }". (OK)
3: The SlipCell constructor is called "SlipCell() { }".. (OK)
4: The SlipHeader constructor is called "SlipHeader(SlipHeader* header) {
constructHeader(0); }". (OK)
5: On exit from the SlipHeader constructor an unrelated call is made to an
overridden logical not (operator!=) for a double. Now this I don't understand
and the overridden code has a 'throw' in it.
Each cell is configured as:
struct {
void* operator;
SlipCellBase* leftLink;
SlipCellBase* rightLink;
}
Where 'operator' points to an object in global scope containing valid
(overridden) operators for the type of Slip Cell being created (there are 4
different types of cells plus a separate class for each of the data types
supported - 7 additional classes).
And the operator pointer is to a (static) class containing legal operators for
an object of type SlipHeader, not a class with an object of type double. It
seems wrong and it's creating havoc. I would like to create an example but I
have no idea what the root cause is, and munging around with the code will take
several days. So, is there a call to a logical (or bitwise) not in the normal
code that gcc generates? Does the flow of control seem ok? Or do you have any
suggestions as to what I can do to narrow down the problem so that (at least) I
understand what's wrong?
If you can handle the whole nine yards I can send you all my code. The error
occurs in my main, which consists of a series of tests of my software. All the
tests, prior to this one, succeed.This test fails at the indicated statement
above. Compilation of the code takes about 10s and execution to failure takes
<1s.
thanks
art
