`RULE-6-8-4`: FN for `*this` returning member

[knewbury01]

Affected rules

• RULE-6-8-4

Description

does not find pointer dereferences for this in member functions.

likely need to extend MembersReturningObject to use getASubobjectAccessOfPointee but right now that duplicates results with MembersReturningSubObject unless other checks are applied to make sure the return is an address or reference

getASubobjectAccessOfPointee would also need to be more thoroughly tested in this case

Example

struct A {
  int a;
  A &getstructbad2() { return *this; } // NON_COMPLIANT[FALSE_NEGATIVE]
};