Am 06.06.14 13:20, schrieb Alain Ketterlin:
Chris Angelico <ros...@gmail.com> writes:
It's impossible to accidentally call a base class's method when you
ought to have called the overriding method in the subclass, which is a
risk in C++ [2].
I don't how this can happen in C++, unless you actually have an instance
of the base class. Anyway, I didn't mention C++.
A special, but important case of this is inside the constructor. Until
you exit the constructor, C++ treats the object as not fully
constructed, and if you call a virtual method there, it calls the method
of the base class.
http://www.parashift.com/c++-faq/calling-virtuals-from-ctors.html
The answer is, of course, to create a *separate* init function in
addition to the constructor and to require the user of the class to call
it after the constructor, or to hide the real constructor away and
require the user to call a factory function instead.
I love C++.
(seriously, but not /that/ part)
Christian
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