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c++functionc++11using

Is it possible to use using for functions?

For example

template<class T, class U>
void f();

template<class T> using g = f<T, int>;

Or any similar idea for functions?

Solution

  • No. You cannot do that. You need to create a new function that calls f, forwarding all arguments and template arguments.

    template<class T, class U>
void f();

template<class T>
void g() {
    f<T, int>();
}

    A C++14 alternative is a variable template of function pointer type:

    template<typename T>
void (*g)() = &f<T, int>;

    Although this approach ignores default arguments and probably has other quirks as well. I highly recommend the more verbose wrapping approach.