A problem about template.

[andy660]

#include <list>

template <class TYPE, class ARG_TYPE = const TYPE &>
class CList
{
private:
typedef std::list<TYPE>:ointer pointer;

};

when I compiled it with g++, it told me that "type 'std::list<TYPE,
std::allocator<_CharT> >' is not derived from type 'CList<TYPE,
ARG_TYPE>'"

Who can tell me why?

 

[kwikius]

#include <list>

template <class TYPE, class ARG_TYPE = const TYPE &>
class CList
{
private:
typedef std::list<TYPE>:ointer pointer;

};

when I compiled it with g++, it told me that "type 'std::list<TYPE,
std::allocator<_CharT> >' is not derived from type 'CList<TYPE,
ARG_TYPE>'"

Who can tell me why?

Dunno, but you could try :

template <class TYPE, class ARG_TYPE = const TYPE &>
class CList
{
private:
typedef typename std::list<TYPE>:ointer pointer;

};

HTH

regards
Andy Little

 

[andy660]

Thanks.

"kwikius дµÀ£º