CODEWITHSUNDEEP
c++templatesoverload-resolution
lubgr
lubgr

Reputation: 38325

What's the correct syntax for passing an explicitly specified function template overload as a template parameter?

Consider the following two function templates

template<class T> void g(std::vector<T>&) {}
template<class T> void g(std::list<T>&) {}

together with the intermediate function

template<class Fct, class Container> void h(Fct&& f, Container& c)
{
   f(c);
}

How do I call h with an explicit instantiation of g (like the first solution in this answer)? I tried these

std::vector<int> vec;

h(g<void(std::vector<int>&)>, vec); // Error, can't deduce template paramter Fct
h(g<void<int>(std::vector<int>&)>, vec); // Same problem

but now I'm lacking imagination for trying out an alternative syntax (I know that I can wrap the call in a lambda or a function object, but that's not what I want to do here). Thanks for suggestions!

Upvotes: 3

Views: 242

Answers (1)

lubgr
lubgr

Reputation: 38325

Ok, I figured it out myself:

h<void(std::vector<int>&)>(g, vec);

It was confused about which function template to explicitly instantiate and incorrectly chose g instead of h.

Upvotes: 1

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