#include <iostream>
#include <vector>
 
template <typename T> class Bar {};
 
template <typename C> struct get_template_type;
 
template <template <typename > class C, typename T>
struct get_template_type<C<T>>
{
    using type = T;
};
 
template <typename T>
void someFunction()
{
    std::cout << __PRETTY_FUNCTION__ << std::endl;
}
 
template <typename C>
void test(const C& c)
{
    for (auto& foo : c) {
        someFunction<typename get_template_type<typename std::decay<decltype(foo)>::type>::type>();
    }
}
 
int main() {
    std::vector<Bar<int>> fs(1);
 
    test(fs);
}
 

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