Results in {TRUE} if f is a virtual member function found in D, or a base class of D, otherwise {FALSE}. If it returns {TRUE} the call can be done using virtual dispatch, otherwise the call must be done directly.

Results in {TRUE} if f is a non-static member function found in a virtual base class of D, otherwise {FALSE}. If it returns {TRUE} the this adjustment must be done using __mcall_offsetof_vbase(D, f), otherwise it must be done with __mcall_this_offset(D, f).

Where D class type and f is a non-static member function defined in a virtual base class of D, in other words __mcall_is_in_vbase(D,f) returns true.

This returns at which negative offset in the vtable of the vtable slot that holds the base offset (from the beginning of a D object to the start of the base in which f is defined).

This is the this adjustment necessary when making a call to f with a pointer to a D.

Where D class type and f is a non-static member function defined in D or a non-virtual base class of D.

This returns the offset from the beginning of a D object to the start of the base in which f is defined. This is the this adjustment necessary when making a call to f with a pointer to a D. It is either zero if f is found in D or the same as __offsetof_base(D,B), where B is a non-virtual base class of D that contains f.

If __mcall_this_offset(D,f) is used when f is found in a virtual base class of D it returns an arbitrary value designed to cause an assembly error if used. This is so that such invalid uses of __mcall_this_offset can occur in sections of assembly code that are to be skipped.

Where D is a class and f is a virtual function defined in D, or a base class of D.

The function returns the negative offset of the slot in the vtable that holds the base offset. The base offset is calculated as the distance between a D object to the start of the base in which f is defined.

If __vcall_offsetof_vfunc(D, f) is used when f is not a virtual member function it returns an arbitrary value designed to cause an assembly error if used.