Was this page helpful?
Your feedback about this content is important. Let us know what you think.
Additional feedback?
1500 characters remaining
Compiler Warning (level 1) C4584
Collapse the table of content
Expand the table of content

Compiler Warning (level 1) C4584

Error Message

'class1' : base-class 'class2' is already a base-class of 'class3'

The class you defined inherits from two classes, one of which inherits from the other. For example:

// C4584.cpp
// compile with: /W1 /LD
class A {
};

class B : public A {
};

class C : public A, public B { // C4584
};

In this case, a warning would be issued on class C because it inherits both from class A and class B, which also inherits from class A. This warning serves as a reminder that you must fully qualify the use of members from these base classes or a compiler error will be generated due to the ambiguity as to which class member you refer.

Community Additions

ADD
Show:
© 2015 Microsoft