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+(************************************************************************)
+(*  v      *   The Coq Proof Assistant  /  The Coq Development Team     *)
+(* <O___,, * CNRS-Ecole Polytechnique-INRIA Futurs-Universite Paris Sud *)
+(*   \VV/  **************************************************************)
+(*    //   *      This file is distributed under the terms of the       *)
+(*         *       GNU Lesser General Public License Version 2.1        *)
+(************************************************************************)
+
+(*i $Id: pattern.mli,v 1.17.2.1 2004/07/16 19:30:45 herbelin Exp $ i*)
+
+(*i*)
+open Pp
+open Names
+open Sign
+open Term
+open Environ
+open Libnames
+open Nametab
+open Rawterm
+(*i*)
+
+(* Pattern variables *)
+
+type patvar_map = (patvar * constr) list
+val pr_patvar : patvar -> std_ppcmds
+
+(* Only for v7 parsing/printing *)
+val patvar_of_int : int -> patvar
+val patvar_of_int_v7 : int -> patvar
+
+(* Patterns *)
+
+type constr_pattern =
+  | PRef of global_reference
+  | PVar of identifier
+  | PEvar of existential_key * constr_pattern array
+  | PRel of int
+  | PApp of constr_pattern * constr_pattern array
+  | PSoApp of patvar * constr_pattern list
+  | PLambda of name * constr_pattern * constr_pattern
+  | PProd of name * constr_pattern * constr_pattern
+  | PLetIn of name * constr_pattern * constr_pattern
+  | PSort of rawsort
+  | PMeta of patvar option
+  | PCase of (inductive option * case_style)
+      * constr_pattern option * constr_pattern * constr_pattern array
+  | PFix of fixpoint
+  | PCoFix of cofixpoint
+
+val occur_meta_pattern : constr_pattern -> bool
+
+val subst_pattern : substitution -> constr_pattern -> constr_pattern
+
+type constr_label =
+  | ConstNode of constant
+  | IndNode of inductive
+  | CstrNode of constructor
+  | VarNode of identifier
+
+val label_of_ref : global_reference -> constr_label
+
+val subst_label : substitution -> constr_label -> constr_label
+
+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 -> constr_label
+
+(* [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 -> constr_label
+
+(* [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 : constr -> constr_pattern
+
+(* [pattern_of_rawconstr 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_rawconstr : rawconstr -> 
+      patvar list * constr_pattern
+
+val instantiate_pattern :
+  (identifier * constr_pattern) list -> constr_pattern -> constr_pattern