adapting a non-constexpr integral value to a non-type template parameter, and code bloat

Question

Consider a function object F taking a constexpr size_t argument I

struct F
{
    template 
    constex         


        

Answer 1

I'll take the obvious position here and ask if "I want to emphasize that it is constexpr by using it as a template argument" is worth this cost and if:

struct F
{
    constexpr size_t operator()(size_t i) const { return i; }
    template 
    constexpr size_t operator()(size ) const { return (*this)(I); }
};

would not be a much simpler solution.