(***********************************************************************)
(*                                                                     *)
(*                                OCaml                                *)
(*                                                                     *)
(*            Xavier Leroy, projet Cristal, INRIA Rocquencourt         *)
(*                                                                     *)
(*  Copyright 1996 Institut National de Recherche en Informatique et   *)
(*  en Automatique.  All rights reserved.  This file is distributed    *)
(*  under the terms of the Q Public License version 1.0.               *)
(*                                                                     *)
(***********************************************************************)

type term =
    Var of int
  | Term of string * term list

val union: 'a list -> 'a list -> 'a list
val vars: term -> int list
val vars_of_list: term list -> int list
val substitute: (int * term) list -> term -> term
val replace: term -> int list -> term -> term
val replace_nth: int -> term list -> int list -> term -> term list
val matching: term -> term -> (int * term) list
val compsubst: (int * term) list -> (int * term) list -> (int * term) list
val occurs: int -> term -> bool
val unify: term -> term -> (int * term) list
val infixes: string list
val pretty_term: term -> unit
val pretty_close: term -> unit