Classes - Class template help

_VARIADIC_EXPAND_0X(_ALLOC_MEMBER_CONSTRUCT, , , , )
#undef _ALLOC_MEMBER_CONSTRUCT
	template<class _Uty>
		void destroy(_Uty *_Ptr)
		{	// destroy object at _Ptr
		_Ptr->~_Uty(); //Error pointed out here
		}

	size_t max_size() const _THROW0()
		{	// estimate maximum array size
		return ((size_t)(-1) / sizeof (_Ty));
		}
	};

(Code of cMessage::cBlock)


class cMessage
{

public:
	class cBlock
	{
		friend class cMessage;

		mutable BYTE *m_pStart, *m_pUsed;
	
private:
		cBlock ();
		cBlock ( const cBlock &from );
		~cBlock ();

		BOOL pasteData ( BYTE *&pData, int &nBytes );
		int getAlign ( int nBoundary ) const;
		BOOL pasteAlign ( int &nBytes );

		size_t getUsed () const
		{
			return ( m_pUsed - m_pStart );
		}

		BOOL getData ( size_t &nOffset, size_t &nLength, BYTE * &pBuffer ) const;

	private:
		// Disabled functions
		cBlock &operator= ( const cBlock & );
	};

private:
	typedef std::deque< cBlock > cBlockList;
	cBlockList m_blocks;