Template template parameter with wrong number of template parameters
c++, templates
Solution
Depending on how the policy is used, you may be able to manage with inheritance in place of alias templates:
template<int U, int V> struct PolicyTwoAdaptor {
template<class T> struct type: PolicyTwo<T, U, V> { }; };
C<int, PolicyTwoAdaptor<1, 2>::type> mc2;
Problem
Consider a template class C with a policy set via template template parameter and two policy definitions: ``` template<class T> struct PolicyOne { }; template<class T, int U, int V> struct PolicyTwo { }; template<class T, template<class> class POLICY> struct C { POLICY<T> policy; }; void f() { C<int, PolicyOne> mc1; C<int, PolicyTwo<1, 2> > mc2; // doesn't work this way } ``` `PolicyTwo` doesn't work because of wrong number of template arguments. Is there a way to use `PolicyTwo` as `POLICY` template parameter if you specify the types for the additional template parameters? I'm using C++03, so alias declarations are not available. I'm aware of this question, but I don't see a solution to my problem there.