aboutsummaryrefslogtreecommitdiffhomepage
path: root/pretyping/unification.mli
blob: d5d5caf9efdb3e032f6459893ffe03f99a338d33 (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
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
(************************************************************************)
(*  v      *   The Coq Proof Assistant  /  The Coq Development Team     *)
(* <O___,, *   INRIA - CNRS - LIX - LRI - PPS - Copyright 1999-2016     *)
(*   \VV/  **************************************************************)
(*    //   *      This file is distributed under the terms of the       *)
(*         *       GNU Lesser General Public License Version 2.1        *)
(************************************************************************)

open Term
open Environ
open Evd

type core_unify_flags = {
  modulo_conv_on_closed_terms : Names.transparent_state option;
  use_metas_eagerly_in_conv_on_closed_terms : bool;
  use_evars_eagerly_in_conv_on_closed_terms : bool;
  modulo_delta : Names.transparent_state;
  modulo_delta_types : Names.transparent_state;
  check_applied_meta_types : bool;
  use_pattern_unification : bool;
  use_meta_bound_pattern_unification : bool;
  frozen_evars : Evar.Set.t;
  restrict_conv_on_strict_subterms : bool;
  modulo_betaiota : bool;
  modulo_eta : bool;
}

type unify_flags = {
  core_unify_flags : core_unify_flags;
  merge_unify_flags : core_unify_flags;
  subterm_unify_flags : core_unify_flags;
  allow_K_in_toplevel_higher_order_unification : bool;
  resolve_evars : bool
}

val default_core_unify_flags : unit -> core_unify_flags
val default_no_delta_core_unify_flags : unit -> core_unify_flags

val default_unify_flags : unit -> unify_flags
val default_no_delta_unify_flags : unit -> unify_flags

val elim_flags : unit -> unify_flags
val elim_no_delta_flags : unit -> unify_flags

val is_keyed_unification : unit -> bool

(** The "unique" unification fonction *)
val w_unify :
  env -> evar_map -> conv_pb -> ?flags:unify_flags -> constr -> constr -> evar_map

(** [w_unify_to_subterm env m (c,t)] performs unification of [c] with a
   subterm of [t]. Constraints are added to [m] and the matched
   subterm of [t] is also returned. *)
val w_unify_to_subterm :
  env -> evar_map -> ?flags:unify_flags -> constr * constr -> evar_map * constr

val w_unify_to_subterm_all :
  env -> evar_map -> ?flags:unify_flags -> constr * constr -> (evar_map * constr) list

val w_unify_meta_types : env -> ?flags:unify_flags -> evar_map -> evar_map

(** [w_coerce_to_type env evd c ctyp typ] tries to coerce [c] of type
   [ctyp] so that its gets type [typ]; [typ] may contain metavariables *)
val w_coerce_to_type : env -> evar_map -> constr -> types -> types ->
  evar_map * constr

(* Looking for subterms in contexts at some occurrences, possibly with pattern*)

exception PatternNotFound

type prefix_of_inductive_support_flag = bool

type abstraction_request =
| AbstractPattern of prefix_of_inductive_support_flag * (types -> bool) * Names.Name.t * pending_constr * Locus.clause * bool
| AbstractExact of Names.Name.t * constr * types option * Locus.clause * bool

val finish_evar_resolution : ?flags:Pretyping.inference_flags ->
  env -> Evd.evar_map -> pending_constr -> Evd.evar_map * constr

type abstraction_result =
  Names.Id.t * named_context_val *
    Context.named_declaration list * Names.Id.t option *
    types * (Evd.evar_map * constr) option

val make_abstraction : env -> Evd.evar_map -> constr ->
  abstraction_request -> abstraction_result

val pose_all_metas_as_evars : env -> evar_map -> constr -> evar_map * constr

(*i This should be in another module i*)

(** [abstract_list_all env evd t c l]
   abstracts the terms in l over c to get a term of type t
   (exported for inv.ml) *)
val abstract_list_all :
  env -> evar_map -> constr -> constr -> constr list -> evar_map * (constr * types)

(* For tracing *)

val w_merge : env -> bool -> core_unify_flags -> evar_map *
  (metavariable * constr * (instance_constraint * instance_typing_status)) list *
  (env * types pexistential * types) list -> evar_map

val unify_0 :            Environ.env ->
           Evd.evar_map ->
           Evd.conv_pb ->
           core_unify_flags ->
           Term.types ->
           Term.types ->
           Evd.evar_map * Evd.metabinding list *
           (Environ.env * Term.types Term.pexistential * Term.constr) list

val unify_0_with_initial_metas : 
           Evd.evar_map * Evd.metabinding list *
           (Environ.env * Term.types Term.pexistential * Term.constr) list ->
           bool ->
           Environ.env ->
           Evd.conv_pb ->
           core_unify_flags ->
           Term.types ->
           Term.types ->
           Evd.evar_map * Evd.metabinding list *
           (Environ.env * Term.types Term.pexistential * Term.constr) list