Type in derived template class unknown

[sygnosys]

Hi,

I'm using VC++ 2005 can anyone tell me what's wrong with the following
piece of code.
It simply does not compile spitting out the following error "error
C2039: 'TypeDerived' : is not a member of 'Derived<X>'"

template <class X, class Y>
class Base {
public:

typename X::Type m_DerivedTypeA;
typename Y::TypeDerived m_DerivedTypeB;
};

class OutSide
{
public:
typedef int Type;
};

template <class X>
class Derived: public Base<X,Derived<X> >
{
public:
typedef int TypeDerived;

};

Derived<OutSide> variable;


Thanks
Cláudio Albuquerque

 

[werasm]

Hi,

I'm using VC++ 2005 can anyone tell me what's wrong with the following
piece of code.
It simply does not compile spitting out the following error "error
C2039: 'TypeDerived' : is not a member of 'Derived<X>'"

template <class X, class Y>
class Base {
public:

typename X::Type m_DerivedTypeA;
typename Y::TypeDerived m_DerivedTypeB;
};

First, you would need typedef before typename here above.

class OutSide
{
public:
typedef int Type;
};

template <class X>
class Derived: public Base<X,Derived<X> >
{
public:
typedef int TypeDerived;

};

Instantiating Derived recursively. Unless you have some defined partial
specialisation that terminates the recursion, this won't compile.

Werner