main.ml
open Core type person = { name: string ; age: int ; human : bool } [@@deriving show] let () = let human_one = { name = "david" ; age = 32 ; human = false } in printf "%s\n" (show_person human_one)
dune
(executable (name main) (libraries core) (preprocess (pps ppx_deriving.show)))
console
$ opam install base ppx_deriving $ dune exec ./main.exe { Main.name = "david"; age = 32; human = false }