traits and policies

[kimi86]

Hi All,
I am trying to learn about traits and policy templates but cant find an easy tutorial. In fact I haven't been able to understand what they are for and y they are needed.Could any one please guide me on this

[JLBorges]

A few articles that may help clarify the concepts.

Traits:
http://www.drdobbs.com/cpp/c-type-traits/184404270
http://www.gotw.ca/publications/mxc++-item-4.htm

Policy based design:
http://www.drdobbs.com/generic-a-policy-based-basicstring-imple/184403784
http://www.drdobbs.com/policy-based-memory-allocation/184402039