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List:       kde-devel
Subject:    accessing protected members of a parent class
From:       Ellis Whitehead <kde () ellisw ! net>
Date:       2002-04-04 16:41:03
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Is it possible to access protected members in an object whose type is a 
superclass of the current method's class?  Somehow in over ten years of C++ 
programming, I've missed or forgotten the fact that this isn't allowed. :(

Compiling the following code, for example, results in the following error:

$ g++ test.cpp -o test.o
test.cpp: In method `void B::link(A *)':
test.cpp:4: `void A::link(A *)' is protected
test.cpp:15: within this context


class A
{
 protected:
	virtual void link( A* );
};

class B : public A
{
 protected:
	virtual void link( A* );
};

void B::link( A* a )
{
	a->link( 0 );	// *** fails ***
}

 
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