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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 $Id$ i*)
+
+open Util
+open Names
+open Term
+open Libnames
+open Miniml
+
+(*s Utility functions over ML types with meta. *)
+
+val reset_meta_count : unit -> unit
+val new_meta : 'a -> ml_type
+
+val type_subst : int -> ml_type -> ml_type -> ml_type
+val type_subst_list : ml_type list -> ml_type -> ml_type
+val type_subst_vect : ml_type array -> ml_type -> ml_type
+
+val instantiation : ml_schema -> ml_type
+
+val needs_magic : ml_type * ml_type -> bool
+val put_magic_if : bool -> ml_ast -> ml_ast
+val put_magic : ml_type * ml_type -> ml_ast -> ml_ast
+
+(*s ML type environment. *)
+
+module Mlenv : sig
+  type t
+  val empty : t
+
+  (* get the n-th more recently entered schema and instantiate it. *)
+  val get : t -> int -> ml_type
+
+  (* Adding a type in an environment, after generalizing free meta *)
+  val push_gen : t -> ml_type -> t
+
+  (* Adding a type with no [Tvar] *)
+  val push_type : t -> ml_type -> t
+
+  (* Adding a type with no [Tvar] nor [Tmeta] *)
+  val push_std_type : t -> ml_type -> t
+end
+
+(*s Utility functions over ML types without meta *)
+
+val type_mem_kn : mutual_inductive -> ml_type -> bool
+
+val type_maxvar : ml_type -> int
+
+val type_decomp : ml_type -> ml_type list * ml_type
+val type_recomp : ml_type list * ml_type -> ml_type
+
+val var2var' : ml_type -> ml_type
+
+type abbrev_map = global_reference -> ml_type option
+
+val type_expand : abbrev_map -> ml_type -> ml_type
+val type_to_sign : abbrev_map -> ml_type -> sign
+val type_to_signature : abbrev_map -> ml_type -> signature
+val type_expunge : abbrev_map -> ml_type -> ml_type
+val type_expunge_from_sign : abbrev_map -> signature -> ml_type -> ml_type
+
+val isDummy : ml_type -> bool
+val isKill : sign -> bool
+
+val case_expunge : signature -> ml_ast -> ml_ident list * ml_ast
+val term_expunge : signature -> ml_ident list * ml_ast -> ml_ast
+
+
+(*s Special identifiers. [dummy_name] is to be used for dead code
+    and will be printed as [_] in concrete (Caml) code. *)
+
+val anonymous_name : identifier
+val dummy_name : identifier
+val id_of_name : name -> identifier
+val id_of_mlid : ml_ident -> identifier
+val tmp_id : ml_ident -> ml_ident
+
+(*s [collect_lambda MLlam(id1,...MLlam(idn,t)...)] returns
+    the list [idn;...;id1] and the term [t]. *)
+
+val collect_lams : ml_ast -> ml_ident list * ml_ast
+val collect_n_lams : int -> ml_ast -> ml_ident list * ml_ast
+val remove_n_lams : int -> ml_ast -> ml_ast
+val nb_lams : ml_ast -> int
+val named_lams : ml_ident list -> ml_ast -> ml_ast
+val dummy_lams : ml_ast -> int -> ml_ast
+val anonym_or_dummy_lams : ml_ast -> signature -> ml_ast
+
+val eta_args_sign : int -> signature -> ml_ast list
+
+(*s Utility functions over ML terms. *)
+
+val mlapp : ml_ast -> ml_ast list -> ml_ast
+val ast_map : (ml_ast -> ml_ast) -> ml_ast -> ml_ast
+val ast_map_lift : (int -> ml_ast -> ml_ast) -> int -> ml_ast -> ml_ast
+val ast_iter : (ml_ast -> unit) -> ml_ast -> unit
+val ast_occurs : int -> ml_ast -> bool
+val ast_occurs_itvl : int -> int -> ml_ast -> bool
+val ast_lift : int -> ml_ast -> ml_ast
+val ast_pop : ml_ast -> ml_ast
+val ast_subst : ml_ast -> ml_ast -> ml_ast
+
+val ast_glob_subst : ml_ast Refmap.t -> ml_ast -> ml_ast
+
+val normalize : ml_ast -> ml_ast
+val optimize_fix : ml_ast -> ml_ast
+val inline : global_reference -> ml_ast -> bool
+
+exception Impossible
+val check_function_branch : ml_branch -> ml_ast
+val check_constant_branch : ml_branch -> ml_ast
+
+(* Classification of signatures *)
+
+type sign_kind =
+  | EmptySig
+  | NonLogicalSig (* at least a [Keep] *)
+  | UnsafeLogicalSig (* No [Keep], at least a [Kill Kother] *)
+  | SafeLogicalSig (* only [Kill Ktype] *)
+
+val sign_kind : signature -> sign_kind
+
+val sign_no_final_keeps : signature -> signature