c++ - ERROR: "dependent name is not a type". When use typedef type in class as return value, with template

Question

template <class Item>
class bag
{
public:
    //TYPEDEF
    typedef size_t size_type;
    typedef Item value_type;
...
}

and when I use

template<class Item>
bag<Item>::size_type bag<Item>::count(const Item& target) const

VC++ report error as Source.cpp(207): warning C4346: 'bag::size_type' : dependent name is not a type

Could anybody show me why? Thanks!

Answer 1

It should be

template<class Item>
typename bag<Item>::size_type bag<Item>::count(const Item& target) const