Conditional compile-time inclusion/exclusion of code based on template argument(s)?

Question

Consider the following class, with the inner struct Y being used as a type, eg. in templates, later on:

template
class X{
  templat         


        

Answer 1

How about this approach - http://sergey-miryanov.blogspot.com/2009/03/template-class-overriding.html? (sorry for russian)