[Corelinux-develop] meta class

[Christophe Prud'h. <pru...@MI...>]

Hie
my understanding of the requirements for meta class is that
it provides :
1- traits: static features of a type (traits were originally defined by    
Nathan   Meyers)
2- more sophisticated RTTI

it my codes I have, I think, something like that for point 2
all objects are clearly defined within a hierarchy of class and each of them
defines isTypeOf(char*), getClassName() , isA(char*) and the parent,child is 
defined.

for point 1 traits are a very powerful and simple technique to store static 
features and I use them very often.

here is a simple example

template<int Dim, int charSize=8, typename T=double>
class traits
{
public:
 enum { dimension = Dim };
 enum { char_size  = charSize };
 typedef T T_numtype;
};

template<typename Traits>
class A
{
 public:
 enum { dimension = Traits::dimension };
 enum { char_size = Traits::char_size };
 typedef typename Traits::T_numtype T_numtype;
};
	
template<int Dim>
class B: public A<traits<Dim> >
{
 public:
 typedef  A<Traits<Dim> > super;
 enum { dimension = super::dimension };
 enum { char_size = super::char_size };
 typedef typename super::T_numtype T_numtype;
};
	


am I correct in that it is providing 1 and 2 ?
C.

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