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|
(************************************************************************)
(* * The Coq Proof Assistant / The Coq Development Team *)
(* v * INRIA, CNRS and contributors - Copyright 1999-2018 *)
(* <O___,, * (see CREDITS file for the list of authors) *)
(* \VV/ **************************************************************)
(* // * This file is distributed under the terms of the *)
(* * GNU Lesser General Public License Version 2.1 *)
(* * (see LICENSE file for the text of the license) *)
(************************************************************************)
(** Keys for unification and indexing *)
open Globnames
open Term
open Libobject
type key =
| KGlob of global_reference
| KLam
| KLet
| KProd
| KSort
| KCase
| KFix
| KCoFix
| KRel
module KeyOrdered = struct
type t = key
let hash gr =
match gr with
| KGlob gr -> 8 + RefOrdered.hash gr
| KLam -> 0
| KLet -> 1
| KProd -> 2
| KSort -> 3
| KCase -> 4
| KFix -> 5
| KCoFix -> 6
| KRel -> 7
let compare gr1 gr2 =
match gr1, gr2 with
| KGlob gr1, KGlob gr2 -> RefOrdered.compare gr1 gr2
| _, KGlob _ -> -1
| KGlob _, _ -> 1
| k, k' -> Int.compare (hash k) (hash k')
let equal k1 k2 =
match k1, k2 with
| KGlob gr1, KGlob gr2 -> RefOrdered.equal gr1 gr2
| _, KGlob _ -> false
| KGlob _, _ -> false
| k, k' -> k == k'
end
module Keymap = HMap.Make(KeyOrdered)
module Keyset = Keymap.Set
(* Mapping structure for references to be considered equivalent *)
let keys = Summary.ref Keymap.empty ~name:"Keys_decl"
let add_kv k v m =
try Keymap.modify k (fun k' vs -> Keyset.add v vs) m
with Not_found -> Keymap.add k (Keyset.singleton v) m
let add_keys k v =
keys := add_kv k v (add_kv v k !keys)
let equiv_keys k k' =
k == k' || KeyOrdered.equal k k' ||
try Keyset.mem k' (Keymap.find k !keys)
with Not_found -> false
(** Registration of keys as an object *)
let load_keys _ (_,(ref,ref')) =
add_keys ref ref'
let cache_keys o =
load_keys 1 o
let subst_key subst k =
match k with
| KGlob gr -> KGlob (subst_global_reference subst gr)
| _ -> k
let subst_keys (subst,(k,k')) =
(subst_key subst k, subst_key subst k')
let discharge_key = function
| KGlob g when Lib.is_in_section g ->
if isVarRef g then None else Some (KGlob (pop_global_reference g))
| x -> Some x
let discharge_keys (_,(k,k')) =
match discharge_key k, discharge_key k' with
| Some x, Some y -> Some (x, y)
| _ -> None
let rebuild_keys (ref,ref') = (ref, ref')
type key_obj = key * key
let inKeys : key_obj -> obj =
declare_object {(default_object "KEYS") with
cache_function = cache_keys;
load_function = load_keys;
subst_function = subst_keys;
classify_function = (fun x -> Substitute x);
discharge_function = discharge_keys;
rebuild_function = rebuild_keys }
let declare_equiv_keys ref ref' =
Lib.add_anonymous_leaf (inKeys (ref,ref'))
let constr_key kind c =
let open Globnames in
try
let rec aux k =
match kind k with
| Const (c, _) -> KGlob (ConstRef c)
| Ind (i, u) -> KGlob (IndRef i)
| Construct (c,u) -> KGlob (ConstructRef c)
| Var id -> KGlob (VarRef id)
| App (f, _) -> aux f
| Proj (p, _) -> KGlob (ConstRef (Names.Projection.constant p))
| Cast (p, _, _) -> aux p
| Lambda _ -> KLam
| Prod _ -> KProd
| Case _ -> KCase
| Fix _ -> KFix
| CoFix _ -> KCoFix
| Rel _ -> KRel
| Meta _ -> raise Not_found
| Evar _ -> raise Not_found
| Sort _ -> KSort
| LetIn _ -> KLet
in Some (aux c)
with Not_found -> None
open Pp
let pr_key pr_global = function
| KGlob gr -> pr_global gr
| KLam -> str"Lambda"
| KLet -> str"Let"
| KProd -> str"Product"
| KSort -> str"Sort"
| KCase -> str"Case"
| KFix -> str"Fix"
| KCoFix -> str"CoFix"
| KRel -> str"Rel"
let pr_keyset pr_global v =
prlist_with_sep spc (pr_key pr_global) (Keyset.elements v)
let pr_mapping pr_global k v =
pr_key pr_global k ++ str" <-> " ++ pr_keyset pr_global v
let pr_keys pr_global =
Keymap.fold (fun k v acc -> pr_mapping pr_global k v ++ fnl () ++ acc) !keys (mt())
|
