use 'class' 'typename' template parameters?

possible duplicate:

when defining duty template category template c++, this:

template <class t> ...

or this:

template <typename t> ...

is there good reason move over other?

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i supposed many renouned (and interesting) answer, nonetheless genuine answer seems "no, there good reason move over other."

• they homogeneous (except remarkable below).


• some have reasons always typename.


• some have reasons always class.


• some have reasons both.


• some don't caring use.

note, however, before c++17 box template template parameters, class instead typename required. below. (but sole box matter preference, requirement language.)