ocaml/typing/path.ml

37 lines
1.4 KiB
OCaml

(***********************************************************************)
(* *)
(* Objective Caml *)
(* *)
(* Xavier Leroy, projet Cristal, INRIA Rocquencourt *)
(* *)
(* Copyright 1996 Institut National de Recherche en Informatique et *)
(* Automatique. Distributed only by permission. *)
(* *)
(***********************************************************************)
(* $Id$ *)
type t =
Pident of Ident.t
| Pdot of t * string * int
| Papply of t * t
let nopos = -1
let rec same p1 p2 =
match (p1, p2) with
(Pident id1, Pident id2) -> Ident.same id1 id2
| (Pdot(p1, s1, pos1), Pdot(p2, s2, pos2)) -> s1 = s2 & same p1 p2
| (Papply(fun1, arg1), Papply(fun2, arg2)) -> same fun1 fun2 & same arg1 arg2
| (_, _) -> false
let rec isfree id = function
Pident id' -> Ident.same id id'
| Pdot(p, s, pos) -> isfree id p
| Papply(p1, p2) -> isfree id p1 or isfree id p2
let rec binding_time = function
Pident id -> Ident.binding_time id
| Pdot(p, s, pos) -> binding_time p
| Papply(p1, p2) -> max (binding_time p1) (binding_time p2)