Bug with -Woverloaded-virtual on gcc 2.951

[Robert Hoehne]

The -Woverloaded-virtual switch has a bug. At first it produces
a warning where it shouldn't and as second (more strong!) it
produces an error! Here the source file (tt.cc):

class BaseType
{
public:
  virtual const BaseType & operator =(const char *);
};

template <class T>
class DBType_Ord : public BaseType
{
public:
  DBType_Ord<T>();
  virtual const BaseType & operator =(unsigned char);
};

BaseType *d;

void test()
{
  d = new DBType_Ord<unsigned char>();
}


compiling with

gcc -c -Woverloaded-virtual tt.cc

produces:

tt.cc: In instantiation of `DBType_Ord<unsigned char>':
tt.cc:19:   instantiated from here
tt.cc:4: warning: `BaseType::operator =(const char *)' was hidden
tt.cc:12: warning:   by `DBType_Ord<unsigned char>::operator =(unsigned char)'

Robert

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