unikernel/duniverse/ppxlib/examples/simple-deriver/README.md

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+# ppx_deriving_accessors
+
+This folder contains an example of a very simple ppx deriver that will generate
+accessors for record fields from the record type definition.
+
+E.g. the following:
+
+```ocaml
+type t =
+  { a : string
+  ; b : int
+  }
+  [@@deriving accessors]
+```
+
+will generate the following:
+
+```ocaml
+let a x = x.a
+let b x = x.b
+```
+
+It can also be used in `.mli` files to generate the corresponding signatures:
+
+```ocaml
+val a : t -> string
+val b : t -> int
+```