I have some template classes whose declaration looks like this:
template <typename T, typename A, typename B, typename C>
class foo1;
template <typename T, typename A, typename B, typename C>
class foo2;
...
I use them in the following context (every foo* is instantiated with A and B and C which bar was instantiated with) :
template <typename A, typename B, typename C>
class bar {
    foo1<int, A, B, C> f1;
    foo2<int, A, B, C> f2;
    foo2<char, A, B, C> f3;
};
For simplicity and clarity reasons I would like to be able to omit A, B and C parameters inside bar and just write:
...
foo1<int> f1;
...
I know that I could just use alias template for all foo types like this:
template <typename T>
using foo1_a = foo1<T, A, B, C>;
but there could be a lot for foo types and it woul require creating alias for all of them.
I tried to put all this aliases in a class:
template <typename A, typename B, typename C>
class types {
    template <typename T>
    using foo1_a = foo1<T, A, B, C>;
    ...
};
and then usage looks like this:
...
using t = types<A,B,C>;
typename t::template foo1_a<int> f1;
...
but in my opinion this looks even worse...
Is it possible to achieve this in some other way?
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