Implementation C++14 make_integer_sequence

Question

I tried to implement the C++14 alias template make_integer_sequence, which simplifies the creation of the class template integer_sequence.

templ         


        

Answer 1

Simple implementation O(N). Probably not what you want for large N, but my application is only for calling functions with indexed arguments, and I wouldn't expect an arity of more than about 10. I haven't filled in the members of integer_sequence. I'm looking forward to using a standard library implementation and nuking this :)

template 
struct integer_sequence
{ };

template 
struct make_integer_sequence_impl
{
    template 
    struct tmp;

    template 
    struct tmp>
    {
        using type = integer_sequence;
    };

    using type = typename tmp::type>::type;
};

template 
struct make_integer_sequence_impl::type>
{ using type = integer_sequence; };

template 
using make_integer_sequence = typename make_integer_sequence_impl::type;