I’m trying to understand some template code.

I’m trying to understand some template code.

I’m trying to understand some template code.

I’m trying to understand some template code.

I’m trying to understand some template code.

I’m trying to understand some template code.

How to implement compile-time dependency injection in C++ (like in boost-ext/di)? May be here’s some metaprogramming magic described by another acronym (like SFINAE)? Or it’s just a smart combination of well-known metaprogramming techniques?

I’d like to make a compile-time map in which I’ll connect a number to a member of a class. Then return member of a class from a function at compile-time.