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|
(************************************************************************)
(* v * The Coq Proof Assistant / The Coq Development Team *)
(* <O___,, * INRIA - CNRS - LIX - LRI - PPS - Copyright 1999-2012 *)
(* \VV/ **************************************************************)
(* // * This file is distributed under the terms of the *)
(* * GNU Lesser General Public License Version 2.1 *)
(************************************************************************)
open Names
open Term
open Context
(** {6 Occur checks } *)
(** [closedn n M] is true iff [M] is a (deBruijn) closed term under n binders *)
val closedn : int -> constr -> bool
(** [closed0 M] is true iff [M] is a (deBruijn) closed term *)
val closed0 : constr -> bool
(** [noccurn n M] returns true iff [Rel n] does NOT occur in term [M] *)
val noccurn : int -> constr -> bool
(** [noccur_between n m M] returns true iff [Rel p] does NOT occur in term [M]
for n <= p < n+m *)
val noccur_between : int -> int -> constr -> bool
(** Checking function for terms containing existential- or
meta-variables. The function [noccur_with_meta] does not consider
meta-variables applied to some terms (intended to be its local
context) (for existential variables, it is necessarily the case) *)
val noccur_with_meta : int -> int -> constr -> bool
(** {6 Relocation and substitution } *)
(** [exliftn el c] lifts [c] with lifting [el] *)
val exliftn : Esubst.lift -> constr -> constr
(** [liftn n k c] lifts by [n] indexes above or equal to [k] in [c] *)
val liftn : int -> int -> constr -> constr
(** [lift n c] lifts by [n] the positive indexes in [c] *)
val lift : int -> constr -> constr
(** [substnl [a1;...;an] k c] substitutes in parallel [a1],...,[an]
for respectively [Rel(k+1)],...,[Rel(k+n)] in [c]; it relocates
accordingly indexes in [a1],...,[an] and [c] *)
val substnl : constr list -> int -> constr -> constr
val substl : constr list -> constr -> constr
val subst1 : constr -> constr -> constr
val substnl_decl : constr list -> int -> rel_declaration -> rel_declaration
val substl_decl : constr list -> rel_declaration -> rel_declaration
val subst1_decl : constr -> rel_declaration -> rel_declaration
val subst1_named_decl : constr -> named_declaration -> named_declaration
val substl_named_decl : constr list -> named_declaration -> named_declaration
val replace_vars : (Id.t * constr) list -> constr -> constr
(** (subst_var str t) substitute (VAR str) by (Rel 1) in t *)
val subst_var : Id.t -> constr -> constr
(** [subst_vars [id1;...;idn] t] substitute [VAR idj] by [Rel j] in [t]
if two names are identical, the one of least indice is kept *)
val subst_vars : Id.t list -> constr -> constr
(** [substn_vars n [id1;...;idn] t] substitute [VAR idj] by [Rel j+n-1] in [t]
if two names are identical, the one of least indice is kept *)
val substn_vars : int -> Id.t list -> constr -> constr
|
