C++11: defining function on std::array

Question

std::array takes two template parameters:

typename T // the element type
size_t N // the size of the array

I want to define a

Answer 1

The N needs to be a static value. You can, e.g., make a template argument:

template 
void f(std::array x) {
    ...
}

In your example, I would still pass the argument by reference, though:

template 
void f(std::array const& x) {
    ...
}