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(*                                                                     *)
(*                         Caml Special Light                          *)
(*                                                                     *)
(*            Xavier Leroy, projet Cristal, INRIA Rocquencourt         *)
(*                                                                     *)
(*  Copyright 1995 Institut National de Recherche en Informatique et   *)
(*  Automatique.  Distributed only by permission.                      *)
(*                                                                     *)
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(* $Id$ *)

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