|
(************************************************************************)
(* * 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) *)
(************************************************************************)
open Pp
open Util
open CErrors
open Names
open Constr
open Context
open Evd
open EConstr
open Vars
open Environ
open Mod_subst
open Globnames
open Libobject
open Namegen
open Libnames
open Smartlocate
open Termops
open Inductiveops
open Typing
open Decl_kinds
open Typeclasses
open Pattern
open Patternops
open Clenv
open Tacred
open Printer
module NamedDecl = Context.Named.Declaration
(****************************************)
(* General functions *)
(****************************************)
type debug = Debug | Info | Off
exception Bound
let head_constr_bound sigma t =
let t = strip_outer_cast sigma t in
let _,ccl = decompose_prod_assum sigma t in
let hd,args = decompose_app sigma ccl in
match EConstr.kind sigma hd with
| Const (c, _) -> ConstRef c
| Ind (i, _) -> IndRef i
| Construct (c, _) -> ConstructRef c
| Var id -> VarRef id
| Proj (p, _) -> ConstRef (Projection.constant p)
| _ -> raise Bound
let head_constr sigma c =
try head_constr_bound sigma c
with Bound -> user_err (Pp.str "Head identifier must be a constant, section variable, \
(co)inductive type, (co)inductive type constructor, or projection.")
let decompose_app_bound sigma t =
let t = strip_outer_cast sigma t in
let _,ccl = decompose_prod_assum sigma t in
let hd,args = decompose_app_vect sigma ccl in
match EConstr.kind sigma hd with
| Const (c,u) -> ConstRef c, args
| Ind (i,u) -> IndRef i, args
| Construct (c,u) -> ConstructRef c, args
| Var id -> VarRef id, args
| Proj (p, c) -> ConstRef (Projection.constant p), Array.cons c args
| _ -> raise Bound
(** Compute the set of section variables that remain in the named context.
Starts from the top to the bottom of the context, stops at the first
different declaration between the named hyps and the section context. *)
let secvars_of_hyps hyps =
let secctx = Global.named_context () in
let open Context.Named.Declaration in
let pred, all =
List.fold_left (fun (pred,all) decl ->
try let _ = Context.Named.lookup (get_id decl) hyps in
(* Approximation, it might be an hypothesis reintroduced with same name and unconvertible types,
we must allow it currently, as comparing the declarations for syntactic equality is too
strong a check (e.g. an unfold in a section variable would make it unusable). *)
(Id.Pred.add (get_id decl) pred, all)
with Not_found -> (pred, false))
(Id.Pred.empty,true) secctx
in
if all then Id.Pred.full (* If the whole section context is available *)
else pred
let empty_hint_info =
{ hint_priority = None; hint_pattern = None }
(************************************************************************)
(* The Type of Constructions Autotactic Hints *)
(************************************************************************)
type hint_info_expr = Constrexpr.constr_pattern_expr hint_info_gen
type 'a hint_ast =
| Res_pf of 'a (* Hint Apply *)
| ERes_pf of 'a (* Hint EApply *)
| Give_exact of 'a
| Res_pf_THEN_trivial_fail of 'a (* Hint Immediate *)
| Unfold_nth of evaluable_global_reference (* Hint Unfold *)
| Extern of Genarg.glob_generic_argument (* Hint Extern *)
type 'a hints_path_atom_gen =
| PathHints of 'a list
(* For forward hints, their names is the list of projections *)
| PathAny
type hints_path_atom = GlobRef.t hints_path_atom_gen
type 'a hints_path_gen =
| PathAtom of 'a hints_path_atom_gen
| PathStar of 'a hints_path_gen
| PathSeq of 'a hints_path_gen * 'a hints_path_gen
| PathOr of 'a hints_path_gen * 'a hints_path_gen
| PathEmpty
| PathEpsilon
type pre_hints_path = Libnames.qualid hints_path_gen
type hints_path = GlobRef.t hints_path_gen
type hint_term =
| IsGlobRef of GlobRef.t
| IsConstr of constr * Univ.ContextSet.t
type 'a with_uid = {
obj : 'a;
uid : KerName.t;
}
type raw_hint = constr * types * Univ.ContextSet.t
type hint = (raw_hint * clausenv) hint_ast with_uid
type 'a with_metadata = {
pri : int; (* A number lower is higher priority *)
poly : polymorphic; (** Is the hint polymorpic and hence should be refreshed at each application *)
pat : constr_pattern option; (* A pattern for the concl of the Goal *)
name : hints_path_atom; (* A potential name to refer to the hint *)
db : string option; (** The database from which the hint comes *)
secvars : Id.Pred.t; (* The set of section variables the hint depends on *)
code : 'a; (* the tactic to apply when the concl matches pat *)
}
type full_hint = hint with_metadata
type hint_entry = GlobRef.t option *
raw_hint hint_ast with_uid with_metadata
type reference_or_constr =
| HintsReference of qualid
| HintsConstr of Constrexpr.constr_expr
type hint_mode =
| ModeInput (* No evars *)
| ModeNoHeadEvar (* No evar at the head *)
| ModeOutput (* Anything *)
type 'a hints_transparency_target =
| HintsVariables
| HintsConstants
| HintsReferences of 'a list
type hints_expr =
| HintsResolve of (hint_info_expr * bool * reference_or_constr) list
| HintsResolveIFF of bool * qualid list * int option
| HintsImmediate of reference_or_constr list
| HintsUnfold of qualid list
| HintsTransparency of qualid hints_transparency_target * bool
| HintsMode of qualid * hint_mode list
| HintsConstructors of qualid list
| HintsExtern of int * Constrexpr.constr_expr option * Genarg.raw_generic_argument
type import_level = [ `LAX | `WARN | `STRICT ]
let warn_hint : import_level ref = ref `LAX
let read_warn_hint () = match !warn_hint with
| `LAX -> "Lax"
| `WARN -> "Warn"
| `STRICT -> "Strict"
let write_warn_hint = function
| "Lax" -> warn_hint := `LAX
| "Warn" -> warn_hint := `WARN
| "Strict" -> warn_hint := `STRICT
| _ -> user_err Pp.(str "Only the following flags are accepted: Lax, Warn, Strict.")
let () =
Goptions.(declare_string_option
{ optdepr = false;
optname = "behavior of non-imported hints";
optkey = ["Loose"; "Hint"; "Behavior"];
optread = read_warn_hint;
optwrite = write_warn_hint;
})
let fresh_key =
let id = Summary.ref ~name:"HINT-COUNTER" 0 in
fun () ->
let cur = incr id; !id in
let lbl = Id.of_string ("_" ^ string_of_int cur) in
let kn = Lib.make_kn lbl in
let (mp, _) = KerName.repr kn in
(* We embed the full path of the kernel name in the label so that
the identifier should be unique. This ensures that including
two modules together won't confuse the corresponding labels. *)
let lbl = Id.of_string_soft (Printf.sprintf "%s#%i"
(ModPath.to_string mp) cur)
in
KerName.make mp (Label.of_id lbl)
let pri_order_int (id1, {pri=pri1}) (id2, {pri=pri2}) =
let d = pri1 - pri2 in
if Int.equal d 0 then id2 - id1
else d
let pri_order t1 t2 = pri_order_int t1 t2 <= 0
(* Nov 98 -- Papageno *)
(* Les Hints sont ré-organisés en plusieurs databases.
La table impérative "searchtable", de type "hint_db_table",
associe une database (hint_db) à chaque nom.
Une hint_db est une table d'association fonctionelle constr -> search_entry
Le constr correspond à la constante de tête de la conclusion.
Une search_entry est un triplet comprenant :
- la liste des tactiques qui n'ont pas de pattern associé
- la liste des tactiques qui ont un pattern
- un discrimination net borné (Btermdn.t) constitué de tous les
patterns de la seconde liste de tactiques *)
type stored_data = int * full_hint
(* First component is the index of insertion in the table, to keep most recent first semantics. *)
module Bounded_net = Btermdn.Make(struct
type t = stored_data
let compare = pri_order_int
end)
type search_entry = {
sentry_nopat : stored_data list;
sentry_pat : stored_data list;
sentry_bnet : Bounded_net.t;
sentry_mode : hint_mode array list;
}
let empty_se = {
sentry_nopat = [];
sentry_pat = [];
sentry_bnet = Bounded_net.empty;
sentry_mode = [];
}
let eq_pri_auto_tactic (_, x) (_, y) = KerName.equal x.code.uid y.code.uid
let add_tac pat t st se =
match pat with
| None ->
if List.exists (eq_pri_auto_tactic t) se.sentry_nopat then se
else { se with sentry_nopat = List.insert pri_order t se.sentry_nopat }
| Some pat ->
if List.exists (eq_pri_auto_tactic t) se.sentry_pat then se
else { se with
sentry_pat = List.insert pri_order t se.sentry_pat;
sentry_bnet = Bounded_net.add st se.sentry_bnet (pat, t); }
let rebuild_dn st se =
let dn' =
List.fold_left
(fun dn (id, t) -> Bounded_net.add (Some st) dn (Option.get t.pat, (id, t)))
Bounded_net.empty se.sentry_pat
in
{ se with sentry_bnet = dn' }
let lookup_tacs sigma concl st se =
let l' = Bounded_net.lookup sigma st se.sentry_bnet concl in
let sl' = List.stable_sort pri_order_int l' in
List.merge pri_order_int se.sentry_nopat sl'
let is_transparent_gr ts = function
| VarRef id -> TransparentState.is_transparent_variable ts id
| ConstRef cst -> TransparentState.is_transparent_constant ts cst
| IndRef _ | ConstructRef _ -> false
let strip_params env sigma c =
match EConstr.kind sigma c with
| App (f, args) ->
(match EConstr.kind sigma f with
| Const (cst,_) ->
(match Recordops.find_primitive_projection cst with
| Some p ->
let p = Projection.make p false in
let npars = Projection.npars p in
if Array.length args > npars then
mkApp (mkProj (p, args.(npars)),
Array.sub args (npars+1) (Array.length args - (npars + 1)))
else c
| None -> c)
| _ -> c)
| _ -> c
let instantiate_hint env sigma p =
let mk_clenv (c, cty, ctx) =
let sigma = Evd.merge_context_set univ_flexible sigma ctx in
let cl = mk_clenv_from_env env sigma None (c,cty) in
{cl with templval =
{ cl.templval with rebus = strip_params env sigma cl.templval.rebus };
env = empty_env}
in
let code = match p.code.obj with
| Res_pf c -> Res_pf (c, mk_clenv c)
| ERes_pf c -> ERes_pf (c, mk_clenv c)
| Res_pf_THEN_trivial_fail c ->
Res_pf_THEN_trivial_fail (c, mk_clenv c)
| Give_exact c -> Give_exact (c, mk_clenv c)
| Unfold_nth e -> Unfold_nth e
| Extern t -> Extern t
in
{ p with code = { p.code with obj = code } }
let hints_path_atom_eq h1 h2 = match h1, h2 with
| PathHints l1, PathHints l2 -> List.equal GlobRef.equal l1 l2
| PathAny, PathAny -> true
| _ -> false
let rec hints_path_eq h1 h2 = match h1, h2 with
| PathAtom h1, PathAtom h2 -> hints_path_atom_eq h1 h2
| PathStar h1, PathStar h2 -> hints_path_eq h1 h2
| PathSeq (l1, r1), PathSeq (l2, r2) ->
hints_path_eq l1 l2 && hints_path_eq r1 r2
| PathOr (l1, r1), PathOr (l2, r2) ->
hints_path_eq l1 l2 && hints_path_eq r1 r2
| PathEmpty, PathEmpty -> true
| PathEpsilon, PathEpsilon -> true
| _ -> false
let path_matches hp hints =
let rec aux hp hints k =
match hp, hints with
| PathAtom _, [] -> false
| PathAtom PathAny, (_ :: hints') -> k hints'
| PathAtom p, (h :: hints') ->
if hints_path_atom_eq p h then k hints' else false
| PathStar hp', hints ->
k hints || aux hp' hints (fun hints' -> aux hp hints' k)
| PathSeq (hp, hp'), hints ->
aux hp hints (fun hints' -> aux hp' hints' k)
| PathOr (hp, hp'), hints ->
aux hp hints k || aux hp' hints k
| PathEmpty, _ -> false
| PathEpsilon, hints -> k hints
in aux hp hints (fun hints' -> true)
let rec matches_epsilon = function
| PathAtom _ -> false
| PathStar _ -> true
| PathSeq (p, p') -> matches_epsilon p && matches_epsilon p'
| PathOr (p, p') -> matches_epsilon p || matches_epsilon p'
| PathEmpty -> false
| PathEpsilon -> true
let rec is_empty = function
| PathAtom _ -> false
| PathStar _ -> false
| PathSeq (p, p') -> is_empty p || is_empty p'
| PathOr (p, p') -> matches_epsilon p && matches_epsilon p'
| PathEmpty -> true
| PathEpsilon -> false
let path_seq p p' =
match p, p' with
| PathEpsilon, p' -> p'
| p, PathEpsilon -> p
| p, p' -> PathSeq (p, p')
let rec path_derivate hp hint =
let rec derivate_atoms hints hints' =
match hints, hints' with
| gr :: grs, gr' :: grs' when GlobRef.equal gr gr' -> derivate_atoms grs grs'
| [], [] -> PathEpsilon
| [], hints -> PathEmpty
| grs, [] -> PathAtom (PathHints grs)
| _, _ -> PathEmpty
in
match hp with
| PathAtom PathAny -> PathEpsilon
| PathAtom (PathHints grs) ->
(match grs, hint with
| h :: _, PathAny -> PathEmpty
| hints, PathHints hints' -> derivate_atoms hints hints'
| _, _ -> assert false)
| PathStar p -> if path_matches p [hint] then hp else PathEpsilon
| PathSeq (hp, hp') ->
let hpder = path_derivate hp hint in
if matches_epsilon hp then
PathOr (path_seq hpder hp', path_derivate hp' hint)
else if is_empty hpder then PathEmpty
else path_seq hpder hp'
| PathOr (hp, hp') ->
PathOr (path_derivate hp hint, path_derivate hp' hint)
| PathEmpty -> PathEmpty
| PathEpsilon -> PathEmpty
let rec normalize_path h =
match h with
| PathStar PathEpsilon -> PathEpsilon
| PathSeq (PathEmpty, _) | PathSeq (_, PathEmpty) -> PathEmpty
| PathSeq (PathEpsilon, p) | PathSeq (p, PathEpsilon) -> normalize_path p
| PathOr (PathEmpty, p) | PathOr (p, PathEmpty) -> normalize_path p
| PathOr (p, q) ->
let p', q' = normalize_path p, normalize_path q in
if hints_path_eq p p' && hints_path_eq q q' then h
else normalize_path (PathOr (p', q'))
| PathSeq (p, q) ->
let p', q' = normalize_path p, normalize_path q in
if hints_path_eq p p' && hints_path_eq q q' then h
else normalize_path (PathSeq (p', q'))
| _ -> h
let path_derivate hp hint = normalize_path (path_derivate hp hint)
let pp_hints_path_atom prg a =
match a with
| PathAny -> str"_"
| PathHints grs -> pr_sequence prg grs
let pp_hints_path_gen prg =
let rec aux = function
| PathAtom pa -> pp_hints_path_atom prg pa
| PathStar (PathAtom PathAny) -> str"_*"
| PathStar p -> str "(" ++ aux p ++ str")*"
| PathSeq (p, p') -> aux p ++ spc () ++ aux p'
| PathOr (p, p') ->
str "(" ++ aux p ++ spc () ++ str"|" ++ cut () ++ spc () ++
aux p' ++ str ")"
| PathEmpty -> str"emp"
| PathEpsilon -> str"eps"
in aux
let pp_hints_path = pp_hints_path_gen pr_global
let glob_hints_path_atom p =
match p with
| PathHints g -> PathHints (List.map Nametab.global g)
| PathAny -> PathAny
let glob_hints_path =
let rec aux = function
| PathAtom pa -> PathAtom (glob_hints_path_atom pa)
| PathStar p -> PathStar (aux p)
| PathSeq (p, p') -> PathSeq (aux p, aux p')
| PathOr (p, p') -> PathOr (aux p, aux p')
| PathEmpty -> PathEmpty
| PathEpsilon -> PathEpsilon
in aux
let subst_path_atom subst p =
match p with
| PathAny -> p
| PathHints grs ->
let gr' gr = fst (subst_global subst gr) in
let grs' = List.Smart.map gr' grs in
if grs' == grs then p else PathHints grs'
let rec subst_hints_path subst hp =
match hp with
| PathAtom p ->
let p' = subst_path_atom subst p in
if p' == p then hp else PathAtom p'
| PathStar p -> let p' = subst_hints_path subst p in
if p' == p then hp else PathStar p'
| PathSeq (p, q) ->
let p' = subst_hints_path subst p in
let q' = subst_hints_path subst q in
if p' == p && q' == q then hp else PathSeq (p', q')
| PathOr (p, q) ->
let p' = subst_hints_path subst p in
let q' = subst_hints_path subst q in
if p' == p && q' == q then hp else PathOr (p', q')
| _ -> hp
type hint_db_name = string
module Hint_db :
sig
type t
val empty : ?name:hint_db_name -> TransparentState.t -> bool -> t
val find : GlobRef.t -> t -> search_entry
val map_none : secvars:Id.Pred.t -> t -> full_hint list
val map_all : secvars:Id.Pred.t -> GlobRef.t -> t -> full_hint list
val map_existential : evar_map -> secvars:Id.Pred.t ->
(GlobRef.t * constr array) -> constr -> t -> full_hint list
val map_eauto : evar_map -> secvars:Id.Pred.t ->
(GlobRef.t * constr array) -> constr -> t -> full_hint list
val map_auto : evar_map -> secvars:Id.Pred.t ->
(GlobRef.t * constr array) -> constr -> t -> full_hint list
val add_one : env -> evar_map -> hint_entry -> t -> t
val add_list : env -> evar_map -> hint_entry list -> t -> t
val remove_one : GlobRef.t -> t -> t
val remove_list : GlobRef.t list -> t -> t
val iter : (GlobRef.t option -> hint_mode array list -> full_hint list -> unit) -> t -> unit
val use_dn : t -> bool
val transparent_state : t -> TransparentState.t
val set_transparent_state : t -> TransparentState.t -> t
val add_cut : hints_path -> t -> t
val add_mode : GlobRef.t -> hint_mode array -> t -> t
val cut : t -> hints_path
val unfolds : t -> Id.Set.t * Cset.t
val add_modes : hint_mode array list GlobRef.Map.t -> t -> t
val modes : t -> hint_mode array list GlobRef.Map.t
val fold : (GlobRef.t option -> hint_mode array list -> full_hint list -> 'a -> 'a) ->
t -> 'a -> 'a
end =
struct
type t = {
hintdb_state : TransparentState.t;
hintdb_cut : hints_path;
hintdb_unfolds : Id.Set.t * Cset.t;
hintdb_max_id : int;
use_dn : bool;
hintdb_map : search_entry GlobRef.Map.t;
(* A list of unindexed entries starting with an unfoldable constant
or with no associated pattern. *)
hintdb_nopat : (GlobRef.t option * stored_data) list;
hintdb_name : string option;
}
let next_hint_id db =
let h = db.hintdb_max_id in
{ db with hintdb_max_id = succ db.hintdb_max_id }, h
let empty ?name st use_dn = { hintdb_state = st;
hintdb_cut = PathEmpty;
hintdb_unfolds = (Id.Set.empty, Cset.empty);
hintdb_max_id = 0;
use_dn = use_dn;
hintdb_map = GlobRef.Map.empty;
hintdb_nopat = [];
hintdb_name = name; }
let find key db =
try GlobRef.Map.find key db.hintdb_map
with Not_found -> empty_se
let realize_tac secvars (id,tac) =
if Id.Pred.subset tac.secvars secvars then Some tac
else
(* Warn about no longer typable hint? *)
None
let head_evar sigma c =
let rec hrec c = match EConstr.kind sigma c with
| Evar (evk,_) -> evk
| Case (_,_,c,_) -> hrec c
| App (c,_) -> hrec c
| Cast (c,_,_) -> hrec c
| Proj (p, c) -> hrec c
| _ -> raise Evarutil.NoHeadEvar
in
hrec c
let match_mode sigma m arg =
match m with
| ModeInput -> not (occur_existential sigma arg)
| ModeNoHeadEvar ->
(try ignore(head_evar sigma arg); false
with Evarutil.NoHeadEvar -> true)
| ModeOutput -> true
let matches_mode sigma args mode =
Array.length mode == Array.length args &&
Array.for_all2 (match_mode sigma) mode args
let matches_modes sigma args modes =
if List.is_empty modes then true
else List.exists (matches_mode sigma args) modes
let merge_entry secvars db nopat pat =
let h = List.sort pri_order_int (List.map snd db.hintdb_nopat) in
let h = List.merge pri_order_int h nopat in
let h = List.merge pri_order_int h pat in
List.map_filter (realize_tac secvars) h
let map_none ~secvars db =
merge_entry secvars db [] []
let map_all ~secvars k db =
let se = find k db in
merge_entry secvars db se.sentry_nopat se.sentry_pat
(* Precondition: concl has no existentials *)
let map_auto sigma ~secvars (k,args) concl db =
let se = find k db in
let st = if db.use_dn then (Some db.hintdb_state) else None in
let pat = lookup_tacs sigma concl st se in
merge_entry secvars db [] pat
let map_existential sigma ~secvars (k,args) concl db =
let se = find k db in
if matches_modes sigma args se.sentry_mode then
merge_entry secvars db se.sentry_nopat se.sentry_pat
else merge_entry secvars db [] []
(* [c] contains an existential *)
let map_eauto sigma ~secvars (k,args) concl db =
let se = find k db in
if matches_modes sigma args se.sentry_mode then
let st = if db.use_dn then Some db.hintdb_state else None in
let pat = lookup_tacs sigma concl st se in
merge_entry secvars db [] pat
else merge_entry secvars db [] []
let is_exact = function
| Give_exact _ -> true
| _ -> false
let is_unfold = function
| Unfold_nth _ -> true
| _ -> false
let addkv gr id v db =
let idv = id, { v with db = db.hintdb_name } in
let k = match gr with
| Some gr -> if db.use_dn && is_transparent_gr db.hintdb_state gr &&
is_unfold v.code.obj then None else Some gr
| None -> None
in
let dnst = if db.use_dn then Some db.hintdb_state else None in
let pat = if not db.use_dn && is_exact v.code.obj then None else v.pat in
match k with
| None ->
let is_present (_, (_, v')) = KerName.equal v.code.uid v'.code.uid in
if not (List.exists is_present db.hintdb_nopat) then
(* FIXME *)
{ db with hintdb_nopat = (gr,idv) :: db.hintdb_nopat }
else db
| Some gr ->
let oval = find gr db in
{ db with hintdb_map = GlobRef.Map.add gr (add_tac pat idv dnst oval) db.hintdb_map }
let rebuild_db st' db =
let db' =
{ db with hintdb_map = GlobRef.Map.map (rebuild_dn st') db.hintdb_map;
hintdb_state = st'; hintdb_nopat = [] }
in
List.fold_left (fun db (gr,(id,v)) -> addkv gr id v db) db' db.hintdb_nopat
let add_one env sigma (k, v) db =
let v = instantiate_hint env sigma v in
let st',db,rebuild =
match v.code.obj with
| Unfold_nth egr ->
let addunf ts (ids, csts) =
let open TransparentState in
match egr with
| EvalVarRef id ->
{ ts with tr_var = Id.Pred.add id ts.tr_var }, (Id.Set.add id ids, csts)
| EvalConstRef cst ->
{ ts with tr_cst = Cpred.add cst ts.tr_cst }, (ids, Cset.add cst csts)
in
let state, unfs = addunf db.hintdb_state db.hintdb_unfolds in
state, { db with hintdb_unfolds = unfs }, true
| _ -> db.hintdb_state, db, false
in
let db = if db.use_dn && rebuild then rebuild_db st' db else db in
let db, id = next_hint_id db in
addkv k id v db
let add_list env sigma l db = List.fold_left (fun db k -> add_one env sigma k db) db l
let remove_sdl p sdl = List.filter p sdl
let remove_he st p se =
let sl1' = remove_sdl p se.sentry_nopat in
let sl2' = remove_sdl p se.sentry_pat in
if sl1' == se.sentry_nopat && sl2' == se.sentry_pat then se
else rebuild_dn st { se with sentry_nopat = sl1'; sentry_pat = sl2' }
let remove_list grs db =
let filter (_, h) =
match h.name with PathHints [gr] -> not (List.mem_f GlobRef.equal gr grs) | _ -> true in
let hintmap = GlobRef.Map.map (remove_he db.hintdb_state filter) db.hintdb_map in
let hintnopat = List.filter (fun (ge, sd) -> filter sd) db.hintdb_nopat in
{ db with hintdb_map = hintmap; hintdb_nopat = hintnopat }
let remove_one gr db = remove_list [gr] db
let get_entry se =
let h = List.merge pri_order_int se.sentry_nopat se.sentry_pat in
List.map snd h
let iter f db =
let iter_se k se = f (Some k) se.sentry_mode (get_entry se) in
f None [] (List.map (fun x -> snd (snd x)) db.hintdb_nopat);
GlobRef.Map.iter iter_se db.hintdb_map
let fold f db accu =
let accu = f None [] (List.map (fun x -> snd (snd x)) db.hintdb_nopat) accu in
GlobRef.Map.fold (fun k se -> f (Some k) se.sentry_mode (get_entry se)) db.hintdb_map accu
let transparent_state db = db.hintdb_state
let set_transparent_state db st =
if db.use_dn then rebuild_db st db
else { db with hintdb_state = st }
let add_cut path db =
{ db with hintdb_cut = normalize_path (PathOr (db.hintdb_cut, path)) }
let add_mode gr m db =
let se = find gr db in
let se = { se with sentry_mode = m :: se.sentry_mode } in
{ db with hintdb_map = GlobRef.Map.add gr se db.hintdb_map }
let cut db = db.hintdb_cut
let unfolds db = db.hintdb_unfolds
let add_modes modes db =
let f gr e me =
Some { e with sentry_mode = me.sentry_mode @ e.sentry_mode }
in
let mode_entries = GlobRef.Map.map (fun m -> { empty_se with sentry_mode = m }) modes in
{ db with hintdb_map = GlobRef.Map.union f db.hintdb_map mode_entries }
let modes db = GlobRef.Map.map (fun se -> se.sentry_mode) db.hintdb_map
let use_dn db = db.use_dn
end
module Hintdbmap = String.Map
type hint_db = Hint_db.t
let searchtable = Summary.ref ~name:"searchtable" Hintdbmap.empty
let statustable = Summary.ref ~name:"statustable" KNmap.empty
let searchtable_map name =
Hintdbmap.find name !searchtable
let searchtable_add (name,db) =
searchtable := Hintdbmap.add name db !searchtable
let current_db_names () = Hintdbmap.domain !searchtable
let current_db () = Hintdbmap.bindings !searchtable
let current_pure_db () = List.map snd (current_db ())
let error_no_such_hint_database x =
user_err ~hdr:"Hints" (str "No such Hint database: " ++ str x ++ str ".")
(**************************************************************************)
(* Auxiliary functions to prepare AUTOHINT objects *)
(**************************************************************************)
let rec nb_hyp sigma c = match EConstr.kind sigma c with
| Prod(_,_,c2) -> if noccurn sigma 1 c2 then 1+(nb_hyp sigma c2) else nb_hyp sigma c2
| _ -> 0
(* adding and removing tactics in the search table *)
let try_head_pattern c =
try head_pattern_bound c
with BoundPattern ->
user_err (Pp.str "Head pattern or sub-pattern must be a global constant, a section variable, \
an if, case, or let expression, an application, or a projection.")
let with_uid c = { obj = c; uid = fresh_key () }
let secvars_of_idset s =
Id.Set.fold (fun id p ->
if is_section_variable id then
Id.Pred.add id p
else p) s Id.Pred.empty
let secvars_of_constr env sigma c =
secvars_of_idset (Termops.global_vars_set env sigma c)
let secvars_of_global env gr =
secvars_of_idset (vars_of_global env gr)
let make_exact_entry env sigma info poly ?(name=PathAny) (c, cty, ctx) =
let secvars = secvars_of_constr env sigma c in
let cty = strip_outer_cast sigma cty in
match EConstr.kind sigma cty with
| Prod _ -> failwith "make_exact_entry"
| _ ->
let pat = Patternops.pattern_of_constr env sigma (EConstr.to_constr ~abort_on_undefined_evars:false sigma cty) in
let hd =
try head_pattern_bound pat
with BoundPattern -> failwith "make_exact_entry"
in
let pri = match info.hint_priority with None -> 0 | Some p -> p in
let pat = match info.hint_pattern with
| Some pat -> snd pat
| None -> pat
in
(Some hd,
{ pri; poly; pat = Some pat; name;
db = None; secvars;
code = with_uid (Give_exact (c, cty, ctx)); })
let make_apply_entry env sigma (eapply,hnf,verbose) info poly ?(name=PathAny) (c, cty, ctx) =
let cty = if hnf then hnf_constr env sigma cty else cty in
match EConstr.kind sigma cty with
| Prod _ ->
let sigma' = Evd.merge_context_set univ_flexible sigma ctx in
let ce = mk_clenv_from_env env sigma' None (c,cty) in
let c' = clenv_type (* ~reduce:false *) ce in
let pat = Patternops.pattern_of_constr env ce.evd (EConstr.to_constr ~abort_on_undefined_evars:false sigma c') in
let hd =
try head_pattern_bound pat
with BoundPattern -> failwith "make_apply_entry" in
let miss = clenv_missing ce in
let nmiss = List.length miss in
let secvars = secvars_of_constr env sigma c in
let pri = match info.hint_priority with None -> nb_hyp sigma' cty + nmiss | Some p -> p in
let pat = match info.hint_pattern with
| Some p -> snd p | None -> pat
in
if Int.equal nmiss 0 then
(Some hd,
{ pri; poly; pat = Some pat; name;
db = None;
secvars;
code = with_uid (Res_pf(c,cty,ctx)); })
else begin
if not eapply then failwith "make_apply_entry";
if verbose then begin
let variables = str (CString.plural nmiss "variable") in
Feedback.msg_info (
strbrk "The hint " ++
pr_leconstr_env env sigma' c ++
strbrk " will only be used by eauto, because applying " ++
pr_leconstr_env env sigma' c ++
strbrk " would leave " ++ variables ++ Pp.spc () ++
Pp.prlist_with_sep Pp.pr_comma Name.print (List.map (Evd.meta_name ce.evd) miss) ++
strbrk " as unresolved existential " ++ variables ++ str "."
)
end;
(Some hd,
{ pri; poly; pat = Some pat; name;
db = None; secvars;
code = with_uid (ERes_pf(c,cty,ctx)); })
end
| _ -> failwith "make_apply_entry"
(* flags is (e,h,v) with e=true if eapply and h=true if hnf and v=true if verbose
c is a constr
cty is the type of constr *)
let pr_hint_term env sigma ctx = function
| IsGlobRef gr -> pr_global gr
| IsConstr (c, ctx) ->
let sigma = Evd.merge_context_set Evd.univ_flexible sigma ctx in
pr_econstr_env env sigma c
let warn_polymorphic_hint =
CWarnings.create ~name:"polymorphic-hint" ~category:"automation"
(fun hint -> strbrk"Using polymorphic hint " ++ hint ++
str" monomorphically" ++
strbrk" use Polymorphic Hint to use it polymorphically.")
let fresh_global_or_constr env sigma poly cr =
let isgr, (c, ctx) =
match cr with
| IsGlobRef gr ->
let (c, ctx) = UnivGen.fresh_global_instance env gr in
true, (EConstr.of_constr c, ctx)
| IsConstr (c, ctx) -> false, (c, ctx)
in
if poly then (c, ctx)
else if Univ.ContextSet.is_empty ctx then (c, ctx)
else begin
if isgr then
warn_polymorphic_hint (pr_hint_term env sigma ctx cr);
Declare.declare_universe_context false ctx;
(c, Univ.ContextSet.empty)
end
let make_resolves env sigma flags info poly ?name cr =
let c, ctx = fresh_global_or_constr env sigma poly cr in
let cty = Retyping.get_type_of env sigma c in
let try_apply f =
try Some (f (c, cty, ctx)) with Failure _ -> None in
let ents = List.map_filter try_apply
[make_exact_entry env sigma info poly ?name;
make_apply_entry env sigma flags info poly ?name]
in
if List.is_empty ents then
user_err ~hdr:"Hint"
(pr_leconstr_env env sigma c ++ spc() ++
(if pi1 flags then str"cannot be used as a hint."
else str "can be used as a hint only for eauto."));
ents
(* used to add an hypothesis to the local hint database *)
let make_resolve_hyp env sigma decl =
let hname = NamedDecl.get_id decl in
let c = mkVar hname in
try
[make_apply_entry env sigma (true, true, false) empty_hint_info false
~name:(PathHints [VarRef hname])
(c, NamedDecl.get_type decl, Univ.ContextSet.empty)]
with
| Failure _ -> []
| e when Logic.catchable_exception e -> anomaly (Pp.str "make_resolve_hyp.")
(* REM : in most cases hintname = id *)
let make_unfold eref =
let g = global_of_evaluable_reference eref in
(Some g,
{ pri = 4;
poly = false;
pat = None;
name = PathHints [g];
db = None;
secvars = secvars_of_global (Global.env ()) g;
code = with_uid (Unfold_nth eref) })
let make_extern pri pat tacast =
let hdconstr = Option.map try_head_pattern pat in
(hdconstr,
{ pri = pri;
poly = false;
pat = pat;
name = PathAny;
db = None;
secvars = Id.Pred.empty; (* Approximation *)
code = with_uid (Extern tacast) })
let make_mode ref m =
let open Term in
let ty, _ = Typeops.type_of_global_in_context (Global.env ()) ref in
let ctx, t = decompose_prod ty in
let n = List.length ctx in
let m' = Array.of_list m in
if not (n == Array.length m') then
user_err ~hdr:"Hint"
(pr_global ref ++ str" has " ++ int n ++
str" arguments while the mode declares " ++ int (Array.length m'))
else m'
let make_trivial env sigma poly ?(name=PathAny) r =
let c,ctx = fresh_global_or_constr env sigma poly r in
let sigma = Evd.merge_context_set univ_flexible sigma ctx in
let t = hnf_constr env sigma (unsafe_type_of env sigma c) in
let hd = head_constr sigma t in
let ce = mk_clenv_from_env env sigma None (c,t) in
(Some hd, { pri=1;
poly = poly;
pat = Some (Patternops.pattern_of_constr env ce.evd (EConstr.to_constr sigma (clenv_type ce)));
name = name;
db = None;
secvars = secvars_of_constr env sigma c;
code= with_uid (Res_pf_THEN_trivial_fail(c,t,ctx)) })
(**************************************************************************)
(* declaration of the AUTOHINT library object *)
(**************************************************************************)
(* If the database does not exist, it is created *)
(* TODO: should a warning be printed in this case ?? *)
let get_db dbname =
try searchtable_map dbname
with Not_found -> Hint_db.empty ~name:dbname TransparentState.empty false
let add_hint dbname hintlist =
let check (_, h) =
let () = if KNmap.mem h.code.uid !statustable then
user_err Pp.(str "Conflicting hint keys. This can happen when including \
twice the same module.")
in
statustable := KNmap.add h.code.uid false !statustable
in
let () = List.iter check hintlist in
let db = get_db dbname in
let env = Global.env () in
let sigma = Evd.from_env env in
let db' = Hint_db.add_list env sigma hintlist db in
searchtable_add (dbname,db')
let add_transparency dbname target b =
let open TransparentState in
let db = get_db dbname in
let st = Hint_db.transparent_state db in
let st' =
match target with
| HintsVariables -> { st with tr_var = (if b then Id.Pred.full else Id.Pred.empty) }
| HintsConstants -> { st with tr_cst = (if b then Cpred.full else Cpred.empty) }
| HintsReferences grs ->
List.fold_left (fun st gr ->
match gr with
| EvalConstRef c -> { st with tr_cst = (if b then Cpred.add else Cpred.remove) c st.tr_cst }
| EvalVarRef v -> { st with tr_var = (if b then Id.Pred.add else Id.Pred.remove) v st.tr_var })
st grs
in searchtable_add (dbname, Hint_db.set_transparent_state db st')
let remove_hint dbname grs =
let db = get_db dbname in
let db' = Hint_db.remove_list grs db in
searchtable_add (dbname, db')
type hint_action =
| CreateDB of bool * TransparentState.t
| AddTransparency of evaluable_global_reference hints_transparency_target * bool
| AddHints of hint_entry list
| RemoveHints of GlobRef.t list
| AddCut of hints_path
| AddMode of GlobRef.t * hint_mode array
let add_cut dbname path =
let db = get_db dbname in
let db' = Hint_db.add_cut path db in
searchtable_add (dbname, db')
let add_mode dbname l m =
let db = get_db dbname in
let db' = Hint_db.add_mode l m db in
searchtable_add (dbname, db')
type hint_obj = {
hint_local : bool;
hint_name : string;
hint_action : hint_action;
}
let load_autohint _ (kn, h) =
let name = h.hint_name in
match h.hint_action with
| CreateDB (b, st) -> searchtable_add (name, Hint_db.empty ~name st b)
| AddTransparency (grs, b) -> add_transparency name grs b
| AddHints hints -> add_hint name hints
| RemoveHints grs -> remove_hint name grs
| AddCut path -> add_cut name path
| AddMode (l, m) -> add_mode name l m
let open_autohint i (kn, h) =
if Int.equal i 1 then match h.hint_action with
| AddHints hints ->
let add (_, hint) = statustable := KNmap.add hint.code.uid true !statustable in
List.iter add hints
| _ -> ()
let cache_autohint (kn, obj) =
load_autohint 1 (kn, obj); open_autohint 1 (kn, obj)
let subst_autohint (subst, obj) =
let subst_key gr =
let (gr', t) = subst_global subst gr in
match t with
| None -> gr'
| Some t ->
(try head_constr_bound Evd.empty (EConstr.of_constr t.Univ.univ_abstracted_value)
with Bound -> gr')
in
let subst_hint (k,data as hint) =
let k' = Option.Smart.map subst_key k in
let pat' = Option.Smart.map (subst_pattern subst) data.pat in
let subst_mps subst c = EConstr.of_constr (subst_mps subst (EConstr.Unsafe.to_constr c)) in
let code' = match data.code.obj with
| Res_pf (c,t,ctx) ->
let c' = subst_mps subst c in
let t' = subst_mps subst t in
if c==c' && t'==t then data.code.obj else Res_pf (c', t',ctx)
| ERes_pf (c,t,ctx) ->
let c' = subst_mps subst c in
let t' = subst_mps subst t in
if c==c' && t'==t then data.code.obj else ERes_pf (c',t',ctx)
| Give_exact (c,t,ctx) ->
let c' = subst_mps subst c in
let t' = subst_mps subst t in
if c==c' && t'== t then data.code.obj else Give_exact (c',t',ctx)
| Res_pf_THEN_trivial_fail (c,t,ctx) ->
let c' = subst_mps subst c in
let t' = subst_mps subst t in
if c==c' && t==t' then data.code.obj else Res_pf_THEN_trivial_fail (c',t',ctx)
| Unfold_nth ref ->
let ref' = subst_evaluable_reference subst ref in
if ref==ref' then data.code.obj else Unfold_nth ref'
| Extern tac ->
let tac' = Genintern.generic_substitute subst tac in
if tac==tac' then data.code.obj else Extern tac'
in
let name' = subst_path_atom subst data.name in
let uid' = subst_kn subst data.code.uid in
let data' =
if data.code.uid == uid' && data.pat == pat' &&
data.name == name' && data.code.obj == code' then data
else { data with pat = pat'; name = name'; code = { obj = code'; uid = uid' } }
in
if k' == k && data' == data then hint else (k',data')
in
let action = match obj.hint_action with
| CreateDB _ -> obj.hint_action
| AddTransparency (target, b) ->
let target' =
match target with
| HintsVariables -> target
| HintsConstants -> target
| HintsReferences grs ->
let grs' = List.Smart.map (subst_evaluable_reference subst) grs in
if grs == grs' then target
else HintsReferences grs'
in
if target' == target then obj.hint_action else AddTransparency (target', b)
| AddHints hintlist ->
let hintlist' = List.Smart.map subst_hint hintlist in
if hintlist' == hintlist then obj.hint_action else AddHints hintlist'
| RemoveHints grs ->
let grs' = List.Smart.map (subst_global_reference subst) grs in
if grs == grs' then obj.hint_action else RemoveHints grs'
| AddCut path ->
let path' = subst_hints_path subst path in
if path' == path then obj.hint_action else AddCut path'
| AddMode (l,m) ->
let l' = subst_global_reference subst l in
if l' == l then obj.hint_action else AddMode (l', m)
in
if action == obj.hint_action then obj else { obj with hint_action = action }
let classify_autohint obj =
match obj.hint_action with
| AddHints [] -> Dispose
| _ -> if obj.hint_local then Dispose else Substitute obj
let inAutoHint : hint_obj -> obj =
declare_object {(default_object "AUTOHINT") with
cache_function = cache_autohint;
load_function = load_autohint;
open_function = open_autohint;
subst_function = subst_autohint;
classify_function = classify_autohint; }
let make_hint ?(local = false) name action = {
hint_local = local;
hint_name = name;
hint_action = action;
}
let create_hint_db l n st b =
let hint = make_hint ~local:l n (CreateDB (b, st)) in
Lib.add_anonymous_leaf (inAutoHint hint)
let remove_hints local dbnames grs =
let dbnames = if List.is_empty dbnames then ["core"] else dbnames in
List.iter
(fun dbname ->
let hint = make_hint ~local dbname (RemoveHints grs) in
Lib.add_anonymous_leaf (inAutoHint hint))
dbnames
(**************************************************************************)
(* The "Hint" vernacular command *)
(**************************************************************************)
let add_resolves env sigma clist local dbnames =
List.iter
(fun dbname ->
let r =
List.flatten (List.map (fun (pri, poly, hnf, path, gr) ->
make_resolves env sigma (true,hnf,not !Flags.quiet)
pri poly ~name:path gr) clist)
in
let hint = make_hint ~local dbname (AddHints r) in
Lib.add_anonymous_leaf (inAutoHint hint))
dbnames
let add_unfolds l local dbnames =
List.iter
(fun dbname ->
let hint = make_hint ~local dbname (AddHints (List.map make_unfold l)) in
Lib.add_anonymous_leaf (inAutoHint hint))
dbnames
let add_cuts l local dbnames =
List.iter
(fun dbname ->
let hint = make_hint ~local dbname (AddCut l) in
Lib.add_anonymous_leaf (inAutoHint hint))
dbnames
let add_mode l m local dbnames =
List.iter
(fun dbname ->
let m' = make_mode l m in
let hint = make_hint ~local dbname (AddMode (l, m')) in
Lib.add_anonymous_leaf (inAutoHint hint))
dbnames
let add_transparency l b local dbnames =
List.iter
(fun dbname ->
let hint = make_hint ~local dbname (AddTransparency (l, b)) in
Lib.add_anonymous_leaf (inAutoHint hint))
dbnames
let add_extern info tacast local dbname =
let pat = match info.hint_pattern with
| None -> None
| Some (_, pat) -> Some pat
in
let hint = make_hint ~local dbname
(AddHints [make_extern (Option.get info.hint_priority) pat tacast]) in
Lib.add_anonymous_leaf (inAutoHint hint)
let add_externs info tacast local dbnames =
List.iter (add_extern info tacast local) dbnames
let add_trivials env sigma l local dbnames =
List.iter
(fun dbname ->
let l = List.map (fun (name, poly, c) -> make_trivial env sigma poly ~name c) l in
let hint = make_hint ~local dbname (AddHints l) in
Lib.add_anonymous_leaf (inAutoHint hint))
dbnames
type hnf = bool
type nonrec hint_info = hint_info
type hints_entry =
| HintsResolveEntry of (hint_info * polymorphic * hnf * hints_path_atom * hint_term) list
| HintsImmediateEntry of (hints_path_atom * polymorphic * hint_term) list
| HintsCutEntry of hints_path
| HintsUnfoldEntry of evaluable_global_reference list
| HintsTransparencyEntry of evaluable_global_reference hints_transparency_target * bool
| HintsModeEntry of GlobRef.t * hint_mode list
| HintsExternEntry of hint_info * Genarg.glob_generic_argument
let default_prepare_hint_ident = Id.of_string "H"
exception Found of constr * types
let prepare_hint check (poly,local) env init (sigma,c) =
let sigma = Typeclasses.resolve_typeclasses ~fail:false env sigma in
(* We re-abstract over uninstantiated evars and universes.
It is actually a bit stupid to generalize over evars since the first
thing make_resolves will do is to re-instantiate the products *)
let sigma, _ = Evd.nf_univ_variables sigma in
let c = Evarutil.nf_evar sigma c in
let c = drop_extra_implicit_args sigma c in
let vars = ref (collect_vars sigma c) in
let subst = ref [] in
let rec find_next_evar c = match EConstr.kind sigma c with
| Evar (evk,args as ev) ->
(* We skip the test whether args is the identity or not *)
let t = Evarutil.nf_evar sigma (existential_type sigma ev) in
let t = List.fold_right (fun (e,id) c -> replace_term sigma e id c) !subst t in
if not (closed0 sigma c) then
user_err Pp.(str "Hints with holes dependent on a bound variable not supported.");
if occur_existential sigma t then
(* Not clever enough to construct dependency graph of evars *)
user_err Pp.(str "Not clever enough to deal with evars dependent in other evars.");
raise (Found (c,t))
| _ -> EConstr.iter sigma find_next_evar c in
let rec iter c =
try find_next_evar c; c
with Found (evar,t) ->
let id = next_ident_away_from default_prepare_hint_ident (fun id -> Id.Set.mem id !vars) in
vars := Id.Set.add id !vars;
subst := (evar,mkVar id)::!subst;
mkNamedLambda (make_annot id Sorts.Relevant) t (iter (replace_term sigma evar (mkVar id) c)) in
let c' = iter c in
let env = Global.env () in
let empty_sigma = Evd.from_env env in
if check then Pretyping.check_evars env empty_sigma sigma c';
let diff = Univ.ContextSet.diff (Evd.universe_context_set sigma) (Evd.universe_context_set init) in
if poly then IsConstr (c', diff)
else if local then IsConstr (c', diff)
else (Declare.declare_universe_context false diff;
IsConstr (c', Univ.ContextSet.empty))
let project_hint ~poly pri l2r r =
let open EConstr in
let open Coqlib in
let gr = Smartlocate.global_with_alias r in
let env = Global.env() in
let sigma = Evd.from_env env in
let sigma, c = Evd.fresh_global env sigma gr in
let t = Retyping.get_type_of env sigma c in
let t =
Tacred.reduce_to_quantified_ref env sigma (lib_ref "core.iff.type") t in
let sign,ccl = decompose_prod_assum sigma t in
let (a,b) = match snd (decompose_app sigma ccl) with
| [a;b] -> (a,b)
| _ -> assert false in
let p =
if l2r then lib_ref "core.iff.proj1" else lib_ref "core.iff.proj2" in
let sigma, p = Evd.fresh_global env sigma p in
let c = Reductionops.whd_beta sigma (mkApp (c, Context.Rel.to_extended_vect mkRel 0 sign)) in
let c = it_mkLambda_or_LetIn
(mkApp (p,[|mkArrow a Sorts.Relevant (lift 1 b);mkArrow b Sorts.Relevant (lift 1 a);c|])) sign in
let id =
Nameops.add_suffix (Nametab.basename_of_global gr) ("_proj_" ^ (if l2r then "l2r" else "r2l"))
in
let ctx = Evd.univ_entry ~poly sigma in
let c = EConstr.to_constr sigma c in
let c = Declare.declare_definition ~internal:Declare.InternalTacticRequest id (c,ctx) in
let info = {Typeclasses.hint_priority = pri; hint_pattern = None} in
(info,false,true,PathAny, IsGlobRef (Globnames.ConstRef c))
let interp_hints poly =
fun h ->
let env = Global.env () in
let sigma = Evd.from_env env in
let f poly c =
let evd,c = Constrintern.interp_open_constr env sigma c in
let env = Global.env () in
let sigma = Evd.from_env env in
prepare_hint true (poly,false) env sigma (evd,c) in
let fref r =
let gr = global_with_alias r in
Dumpglob.add_glob ?loc:r.CAst.loc gr;
gr in
let fr r = evaluable_of_global_reference env (fref r) in
let fi c =
match c with
| HintsReference c ->
let gr = global_with_alias c in
(PathHints [gr], poly, IsGlobRef gr)
| HintsConstr c -> (PathAny, poly, f poly c)
in
let fp = Constrintern.intern_constr_pattern env sigma in
let fres (info, b, r) =
let path, poly, gr = fi r in
let info = { info with hint_pattern = Option.map fp info.hint_pattern } in
(info, poly, b, path, gr)
in
let ft = function
| HintsVariables -> HintsVariables
| HintsConstants -> HintsConstants
| HintsReferences lhints -> HintsReferences (List.map fr lhints)
in
let fp = Constrintern.intern_constr_pattern (Global.env()) in
match h with
| HintsResolve lhints -> HintsResolveEntry (List.map fres lhints)
| HintsResolveIFF (l2r, lc, n) ->
HintsResolveEntry (List.map (project_hint ~poly n l2r) lc)
| HintsImmediate lhints -> HintsImmediateEntry (List.map fi lhints)
| HintsUnfold lhints -> HintsUnfoldEntry (List.map fr lhints)
| HintsTransparency (t, b) -> HintsTransparencyEntry (ft t, b)
| HintsMode (r, l) -> HintsModeEntry (fref r, l)
| HintsConstructors lqid ->
let constr_hints_of_ind qid =
let ind = global_inductive_with_alias qid in
let mib,_ = Global.lookup_inductive ind in
Dumpglob.dump_reference ?loc:qid.CAst.loc "<>" (string_of_qualid qid) "ind";
List.init (nconstructors ind)
(fun i -> let c = (ind,i+1) in
let gr = ConstructRef c in
empty_hint_info,
(Declareops.inductive_is_polymorphic mib), true,
PathHints [gr], IsGlobRef gr)
in HintsResolveEntry (List.flatten (List.map constr_hints_of_ind lqid))
| HintsExtern (pri, patcom, tacexp) ->
let pat = Option.map (fp sigma) patcom in
let l = match pat with None -> [] | Some (l, _) -> l in
let ltacvars = List.fold_left (fun accu x -> Id.Set.add x accu) Id.Set.empty l in
let env = Genintern.({ (empty_glob_sign env) with ltacvars }) in
let _, tacexp = Genintern.generic_intern env tacexp in
HintsExternEntry ({ hint_priority = Some pri; hint_pattern = pat }, tacexp)
let add_hints ~local dbnames h =
if String.List.mem "nocore" dbnames then
user_err Pp.(str "The hint database \"nocore\" is meant to stay empty.");
assert (not (List.is_empty dbnames));
let env = Global.env() in
let sigma = Evd.from_env env in
match h with
| HintsResolveEntry lhints -> add_resolves env sigma lhints local dbnames
| HintsImmediateEntry lhints -> add_trivials env sigma lhints local dbnames
| HintsCutEntry lhints -> add_cuts lhints local dbnames
| HintsModeEntry (l,m) -> add_mode l m local dbnames
| HintsUnfoldEntry lhints -> add_unfolds lhints local dbnames
| HintsTransparencyEntry (lhints, b) ->
add_transparency lhints b local dbnames
| HintsExternEntry (info, tacexp) ->
add_externs info tacexp local dbnames
let expand_constructor_hints env sigma lems =
List.map_append (fun (evd,lem) ->
match EConstr.kind sigma lem with
| Ind (ind,u) ->
List.init (nconstructors ind)
(fun i ->
let ctx = Univ.ContextSet.diff (Evd.universe_context_set evd)
(Evd.universe_context_set sigma) in
not (Univ.ContextSet.is_empty ctx),
IsConstr (mkConstructU ((ind,i+1),u),ctx))
| _ ->
[match prepare_hint false (false,true) env sigma (evd,lem) with
| IsConstr (c, ctx) ->
not (Univ.ContextSet.is_empty ctx), IsConstr (c, ctx)
| IsGlobRef _ -> assert false (* Impossible return value *) ]) lems
(* builds a hint database from a constr signature *)
(* typically used with (lid, ltyp) = pf_hyps_types <some goal> *)
let constructor_hints env sigma eapply lems =
let lems = expand_constructor_hints env sigma lems in
List.map_append (fun (poly, lem) ->
make_resolves env sigma (eapply,true,false) empty_hint_info poly lem) lems
let make_local_hint_db env sigma ts eapply lems =
let map c = c env sigma in
let lems = List.map map lems in
let sign = EConstr.named_context env in
let ts = match ts with
| None -> Hint_db.transparent_state (searchtable_map "core")
| Some ts -> ts
in
let hintlist = List.map_append (make_resolve_hyp env sigma) sign in
Hint_db.empty ts false
|> Hint_db.add_list env sigma hintlist
|> Hint_db.add_list env sigma (constructor_hints env sigma eapply lems)
let make_local_hint_db env sigma ?ts eapply lems =
make_local_hint_db env sigma ts eapply lems
let make_db_list dbnames =
let use_core = not (List.mem "nocore" dbnames) in
let dbnames = List.remove String.equal "nocore" dbnames in
let dbnames = if use_core then "core"::dbnames else dbnames in
let lookup db =
try searchtable_map db with Not_found -> error_no_such_hint_database db
in
List.map lookup dbnames
(**************************************************************************)
(* Functions for printing the hints *)
(**************************************************************************)
let pr_hint_elt env sigma (c, _, _) = pr_econstr_env env sigma c
let pr_hint env sigma h = match h.obj with
| Res_pf (c, _) -> (str"simple apply " ++ pr_hint_elt env sigma c)
| ERes_pf (c, _) -> (str"simple eapply " ++ pr_hint_elt env sigma c)
| Give_exact (c, _) -> (str"exact " ++ pr_hint_elt env sigma c)
| Res_pf_THEN_trivial_fail (c, _) ->
(str"simple apply " ++ pr_hint_elt env sigma c ++ str" ; trivial")
| Unfold_nth c ->
str"unfold " ++ pr_evaluable_reference c
| Extern tac ->
str "(*external*) " ++ Pputils.pr_glb_generic env sigma tac
let pr_id_hint env sigma (id, v) =
let pr_pat p = str", pattern " ++ pr_lconstr_pattern_env env sigma p in
(pr_hint env sigma v.code ++ str"(level " ++ int v.pri ++ pr_opt_no_spc pr_pat v.pat
++ str", id " ++ int id ++ str ")" ++ spc ())
let pr_hint_list env sigma hintlist =
(str " " ++ hov 0 (prlist (pr_id_hint env sigma) hintlist) ++ fnl ())
let pr_hints_db env sigma (name,db,hintlist) =
(str "In the database " ++ str name ++ str ":" ++
if List.is_empty hintlist then (str " nothing" ++ fnl ())
else (fnl () ++ pr_hint_list env sigma hintlist))
(* Print all hints associated to head c in any database *)
let pr_hint_list_for_head env sigma c =
let dbs = current_db () in
let validate (name, db) =
let hints = List.map (fun v -> 0, v) (Hint_db.map_all ~secvars:Id.Pred.full c db) in
(name, db, hints)
in
let valid_dbs = List.map validate dbs in
if List.is_empty valid_dbs then
(str "No hint declared for :" ++ pr_global c)
else
hov 0
(str"For " ++ pr_global c ++ str" -> " ++ fnl () ++
hov 0 (prlist (pr_hints_db env sigma) valid_dbs))
let pr_hint_ref ref = pr_hint_list_for_head ref
(* Print all hints associated to head id in any database *)
let pr_hint_term env sigma cl =
try
let dbs = current_db () in
let valid_dbs =
let fn = try
let hdc = decompose_app_bound sigma cl in
if occur_existential sigma cl then
Hint_db.map_existential sigma ~secvars:Id.Pred.full hdc cl
else Hint_db.map_auto sigma ~secvars:Id.Pred.full hdc cl
with Bound -> Hint_db.map_none ~secvars:Id.Pred.full
in
let fn db = List.map (fun x -> 0, x) (fn db) in
List.map (fun (name, db) -> (name, db, fn db)) dbs
in
if List.is_empty valid_dbs then
(str "No hint applicable for current goal")
else
(str "Applicable Hints :" ++ fnl () ++
hov 0 (prlist (pr_hints_db env sigma) valid_dbs))
with Match_failure _ | Failure _ ->
(str "No hint applicable for current goal")
(* print all hints that apply to the concl of the current goal *)
let pr_applicable_hint pf =
let env = Global.env () in
let pts = Proof_global.give_me_the_proof pf in
let Proof.{goals;sigma} = Proof.data pts in
match goals with
| [] -> CErrors.user_err Pp.(str "No focused goal.")
| g::_ ->
pr_hint_term env sigma (Goal.V82.concl sigma g)
let pp_hint_mode = function
| ModeInput -> str"+"
| ModeNoHeadEvar -> str"!"
| ModeOutput -> str"-"
(* displays the whole hint database db *)
let pr_hint_db_env env sigma db =
let pr_mode = prvect_with_sep spc pp_hint_mode in
let pr_modes l =
if List.is_empty l then mt ()
else str" (modes " ++ prlist_with_sep pr_comma pr_mode l ++ str")"
in
let content =
let fold head modes hintlist accu =
let goal_descr = match head with
| None -> str "For any goal"
| Some head -> str "For " ++ pr_global head ++ pr_modes modes
in
let hints = pr_hint_list env sigma (List.map (fun x -> (0, x)) hintlist) in
let hint_descr = hov 0 (goal_descr ++ str " -> " ++ hints) in
accu ++ hint_descr
in
Hint_db.fold fold db (mt ())
in
let { TransparentState.tr_var = ids; tr_cst = csts } = Hint_db.transparent_state db in
hov 0
((if Hint_db.use_dn db then str"Discriminated database"
else str"Non-discriminated database")) ++ fnl () ++
hov 2 (str"Unfoldable variable definitions: " ++ pr_idpred ids) ++ fnl () ++
hov 2 (str"Unfoldable constant definitions: " ++ pr_cpred csts) ++ fnl () ++
hov 2 (str"Cut: " ++ pp_hints_path (Hint_db.cut db)) ++ fnl () ++
content
let pr_hint_db_by_name env sigma dbname =
try
let db = searchtable_map dbname in pr_hint_db_env env sigma db
with Not_found ->
error_no_such_hint_database dbname
(* displays all the hints of all databases *)
let pr_searchtable env sigma =
let fold name db accu =
accu ++ str "In the database " ++ str name ++ str ":" ++ fnl () ++
pr_hint_db_env env sigma db ++ fnl ()
in
Hintdbmap.fold fold !searchtable (mt ())
let print_mp mp =
try
let qid = Nametab.shortest_qualid_of_module mp in
str " from " ++ pr_qualid qid
with Not_found -> mt ()
let is_imported h = try KNmap.find h.uid !statustable with Not_found -> true
let hint_trace = Evd.Store.field ()
let log_hint h =
let open Proofview.Notations in
Proofview.tclEVARMAP >>= fun sigma ->
let store = get_extra_data sigma in
match Store.get store hint_trace with
| None ->
(* All calls to hint logging should be well-scoped *)
assert false
| Some trace ->
let trace = KNmap.add h.uid h trace in
let store = Store.set store hint_trace trace in
Proofview.Unsafe.tclEVARS (set_extra_data store sigma)
let warn_non_imported_hint =
CWarnings.create ~name:"non-imported-hint" ~category:"automation"
(fun (hint,mp) ->
strbrk "Hint used but not imported: " ++ hint ++ print_mp mp)
let warn env sigma h =
let hint = pr_hint env sigma h in
let mp = KerName.modpath h.uid in
warn_non_imported_hint (hint,mp)
let wrap_hint_warning t =
let open Proofview.Notations in
Proofview.tclEVARMAP >>= fun sigma ->
let store = get_extra_data sigma in
let old = Store.get store hint_trace in
let store = Store.set store hint_trace KNmap.empty in
Proofview.Unsafe.tclEVARS (set_extra_data store sigma) >>= fun () ->
t >>= fun ans ->
Proofview.tclENV >>= fun env ->
Proofview.tclEVARMAP >>= fun sigma ->
let store = get_extra_data sigma in
let hints = match Store.get store hint_trace with
| None -> assert false
| Some hints -> hints
in
let () = KNmap.iter (fun _ h -> warn env sigma h) hints in
let store = match old with
| None -> Store.remove store hint_trace
| Some v -> Store.set store hint_trace v
in
Proofview.Unsafe.tclEVARS (set_extra_data store sigma) >>= fun () ->
Proofview.tclUNIT ans
let wrap_hint_warning_fun env sigma t =
let store = get_extra_data sigma in
let old = Store.get store hint_trace in
let store = Store.set store hint_trace KNmap.empty in
let (ans, sigma) = t (set_extra_data store sigma) in
let store = get_extra_data sigma in
let hints = match Store.get store hint_trace with
| None -> assert false
| Some hints -> hints
in
let () = KNmap.iter (fun _ h -> warn env sigma h) hints in
let store = match old with
| None -> Store.remove store hint_trace
| Some v -> Store.set store hint_trace v
in
(ans, set_extra_data store sigma)
let run_hint tac k = match !warn_hint with
| `LAX -> k tac.obj
| `WARN ->
if is_imported tac then k tac.obj
else Proofview.tclTHEN (log_hint tac) (k tac.obj)
| `STRICT ->
if is_imported tac then k tac.obj
else Proofview.tclZERO (UserError (None, (str "Tactic failure.")))
let repr_hint h = h.obj
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