An author proposes representing related functions as a struct passed at compile time to act like a trait in Zig. Callers make required signatures explicit while the compiler can see concrete implementations, enabling specialization and inlining. The official language reference likewise describes comptime parameters as the basis of generics and compile-time duck typing. The pattern requires types to be known in advance, fits poorly with type erasure, and can enlarge binaries and pressure caches through nested specialization. It is intended for selective abstraction, not a wholesale rewrite of all code.