Question

Is it allowed to have the definition of a purely virtual method as follows?

class Abstract {
public:
   virtual void pureVirtual() = 0 {
      // implementation
   }
};

Cosmo · Accepted Answer

ISO 14882:2003
10.4 Abstract classes
2 ...[Note: a function declaration cannot provide both a pure-specifier and a definition
—end note] [Example:

struct C {
	virtual void f() = 0 { }; // ill-formed
};

—end example] It should be noted that the definition itself is allowed, the standard only prohibits declaring a purely virtual function in the body.

Cosmo · Accepted Answer

No, the definition is not valid

Cosmo · Answer

Yes, the method is accessible by name pureVirtual()

Cosmo · Answer

Yes, the method is accessible by name Abstract::pureVirtual()

Cosmo · Answer

Yes, however the method is not available for calling