blob: d19d81e09cd6bdfc5fc23fd960440846f9bf12e2 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
|
(************************************************************************)
(* 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: evar_refiner.ml 11309 2008-08-06 10:30:35Z herbelin $ *)
open Util
open Names
open Term
open Evd
open Sign
open Proof_trees
open Refiner
(******************************************)
(* Instantiation of existential variables *)
(******************************************)
(* w_tactic pour instantiate *)
let w_refine evk rawc evd =
if Evd.is_defined (evars_of evd) evk then
error "Instantiate called on already-defined evar";
let e_info = Evd.find (evars_of evd) evk in
let env = Evd.evar_env e_info in
let sigma,typed_c =
try Pretyping.Default.understand_tcc ~resolve_classes:false
(evars_of evd) env ~expected_type:e_info.evar_concl rawc
with _ ->
let loc = Rawterm.loc_of_rawconstr rawc in
user_err_loc
(loc,"",Pp.str ("Instance is not well-typed in the environment of " ^
string_of_existential evk))
in
evar_define evk typed_c (evars_reset_evd sigma evd)
(* vernac command Existential *)
let instantiate_pf_com n com pfts =
let gls = top_goal_of_pftreestate pfts in
let sigma = gls.sigma in
let (evk,evi) =
let evl = Evarutil.non_instantiated sigma in
if (n <= 0) then
error "incorrect existential variable index"
else if List.length evl < n then
error "not so many uninstantiated existential variables"
else
List.nth evl (n-1)
in
let env = Evd.evar_env evi in
let rawc = Constrintern.intern_constr sigma env com in
let evd = create_goal_evar_defs sigma in
let evd' = w_refine evk rawc evd in
change_constraints_pftreestate (evars_of evd') pfts
|
