17 Apr
2003
17 Apr
'03
8:26 p.m.
<quote who="Nick Tsocanos">
Sometimes I might make a class, and inherit it from
another. Or, the
class just has virtual functions in it ( I am planning to derive others
from it). In any case, I am trying to access a virtual function in an
instantiated instance at runtime, and when I do, the program crashes.
...
You don't give much detail, but here my guess:
Methods of parent classes (other than the constructor) are not available
from within the constructor of derived classes. The object is not
'completed' until after the constructor exits.
See B. Stroustrup's "The C++ Programming Language" for the gritty details.
Dynamic runtime languages (e.g. Python) do not have this problem... so it
might be a bit suprising depending on your background.
--aws
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