Refactor GenPrimitive #38

Job	Run time
codespell	15s
build (haskell, macos-latest, nixpkgs-unstable)	38m 36s
build (c, macos-latest, nixpkgs-unstable)	7m 18s
build (c, ubuntu-latest, nixos-25.05)	2m 47s
build (haskell, ubuntu-latest, nixos-25.05)	23m 23s
build (c, ubuntu-latest, nixpkgs-unstable)	1m 6s
build (haskell, ubuntu-latest, nixpkgs-unstable)	22m 33s
build (haskell, macos-latest, nixos-25.05)	35m 18s
build (c, macos-latest, nixos-25.05)	3m 46s
	2h 15m 2s

Provide feedback