(************************************************************************)
(*  v      *   The Coq Proof Assistant  /  The Coq Development Team     *)
(* <O___,, *   INRIA - CNRS - LIX - LRI - PPS - Copyright 1999-2017     *)
(*   \VV/  **************************************************************)
(*    //   *      This file is distributed under the terms of the       *)
(*         *       GNU Lesser General Public License Version 2.1        *)
(************************************************************************)

open Term
open Globnames
open Glob_term
open Mod_subst
open Misctypes
open Pattern

(** {5 Functions on patterns} *)

val constr_pattern_eq : constr_pattern -> constr_pattern -> bool

val occur_meta_pattern : constr_pattern -> bool

val subst_pattern : substitution -> constr_pattern -> constr_pattern

exception BoundPattern

(** [head_pattern_bound t] extracts the head variable/constant of the
   type [t] or raises [BoundPattern] (even if a sort); it raises an anomaly
   if [t] is an abstraction *)

val head_pattern_bound : constr_pattern -> global_reference

(** [head_of_constr_reference c] assumes [r] denotes a reference and
   returns its label; raises an anomaly otherwise *)

val head_of_constr_reference : Term.constr -> global_reference

(** [pattern_of_constr c] translates a term [c] with metavariables into
   a pattern; currently, no destructor (Cases, Fix, Cofix) and no
   existential variable are allowed in [c] *)

val pattern_of_constr : Environ.env -> Evd.evar_map -> constr -> constr_pattern

(** [pattern_of_glob_constr l c] translates a term [c] with metavariables into
   a pattern; variables bound in [l] are replaced by the pattern to which they
    are bound *)

val pattern_of_glob_constr : glob_constr ->
      patvar list * constr_pattern

val instantiate_pattern : Environ.env ->
  Evd.evar_map -> extended_patvar_map ->
  constr_pattern -> constr_pattern

val lift_pattern : int -> constr_pattern -> constr_pattern
