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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 *)
(************************************************************************)
(* $Id: instantiate.ml,v 1.3.2.1 2004/07/16 19:30:45 herbelin Exp $ *)
open Pp
open Util
open Names
open Term
open Sign
open Evd
open Declarations
open Environ
let is_id_inst inst =
let is_id (id,c) = match kind_of_term c with
| Var id' -> id = id'
| _ -> false
in
List.for_all is_id inst
(* Vérifier que les instances des let-in sont compatibles ?? *)
let instantiate_sign_including_let sign args =
let rec instrec = function
| ((id,b,_) :: sign, c::args) -> (id,c) :: (instrec (sign,args))
| ([],[]) -> []
| ([],_) | (_,[]) ->
anomaly "Signature and its instance do not match"
in
instrec (sign,args)
let instantiate_evar sign c args =
let inst = instantiate_sign_including_let sign args in
if is_id_inst inst then
c
else
replace_vars inst c
(* Existentials. *)
let existential_type sigma (n,args) =
let info =
try Evd.map sigma n
with Not_found ->
anomaly ("Evar "^(string_of_existential n)^" was not declared") in
let hyps = info.evar_hyps in
instantiate_evar hyps info.evar_concl (Array.to_list args)
exception NotInstantiatedEvar
let existential_value sigma (n,args) =
let info = Evd.map sigma n in
let hyps = info.evar_hyps in
match evar_body info with
| Evar_defined c ->
instantiate_evar hyps c (Array.to_list args)
| Evar_empty ->
raise NotInstantiatedEvar
let existential_opt_value sigma ev =
try Some (existential_value sigma ev)
with NotInstantiatedEvar -> None
|
