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tac2entries.ml
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tac2entries.ml
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(************************************************************************)
(* * The Coq Proof Assistant / The Coq Development Team *)
(* v * Copyright INRIA, CNRS and contributors *)
(* <O___,, * (see version control and CREDITS file for authors & dates) *)
(* \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 CAst
open CErrors
open Names
open Libnames
open Libobject
open Nametab
open Tac2expr
open Tac2print
open Tac2intern
(** Grammar entries *)
module Pltac =
struct
let ltac2_expr = Pcoq.Entry.make "ltac2_expr"
let tac2expr_in_env = Pcoq.Entry.make "tac2expr_in_env"
let q_ident = Pcoq.Entry.make "q_ident"
let q_bindings = Pcoq.Entry.make "q_bindings"
let q_with_bindings = Pcoq.Entry.make "q_with_bindings"
let q_intropattern = Pcoq.Entry.make "q_intropattern"
let q_intropatterns = Pcoq.Entry.make "q_intropatterns"
let q_destruction_arg = Pcoq.Entry.make "q_destruction_arg"
let q_induction_clause = Pcoq.Entry.make "q_induction_clause"
let q_conversion = Pcoq.Entry.make "q_conversion"
let q_orient = Pcoq.Entry.make "q_orient"
let q_rewriting = Pcoq.Entry.make "q_rewriting"
let q_clause = Pcoq.Entry.make "q_clause"
let q_dispatch = Pcoq.Entry.make "q_dispatch"
let q_occurrences = Pcoq.Entry.make "q_occurrences"
let q_reference = Pcoq.Entry.make "q_reference"
let q_strategy_flag = Pcoq.Entry.make "q_strategy_flag"
let q_constr_matching = Pcoq.Entry.make "q_constr_matching"
let q_goal_matching = Pcoq.Entry.make "q_goal_matching"
let q_hintdb = Pcoq.Entry.make "q_hintdb"
let q_move_location = Pcoq.Entry.make "q_move_location"
let q_pose = Pcoq.Entry.make "q_pose"
let q_assert = Pcoq.Entry.make "q_assert"
end
let () =
let entries = [
Pcoq.Entry.Any Pltac.ltac2_expr;
] in
Pcoq.register_grammars_by_name "ltac2" entries
(** Tactic definition *)
type tacdef = {
tacdef_local : bool;
tacdef_mutable : bool;
tacdef_expr : glb_tacexpr;
tacdef_type : type_scheme;
tacdef_deprecation : Deprecation.t option;
}
let perform_tacdef visibility ((sp, kn), def) =
let () = if not def.tacdef_local then Tac2env.push_ltac visibility sp (TacConstant kn) in
let data = {
Tac2env.gdata_expr = def.tacdef_expr;
gdata_type = def.tacdef_type;
gdata_mutable = def.tacdef_mutable;
gdata_deprecation = def.tacdef_deprecation;
} in
Tac2env.define_global kn data
let load_tacdef i obj = perform_tacdef (Until i) obj
let open_tacdef i obj = perform_tacdef (Exactly i) obj
let cache_tacdef ((sp, kn), def) =
let () = Tac2env.push_ltac (Until 1) sp (TacConstant kn) in
let data = {
Tac2env.gdata_expr = def.tacdef_expr;
gdata_type = def.tacdef_type;
gdata_mutable = def.tacdef_mutable;
gdata_deprecation = def.tacdef_deprecation;
} in
Tac2env.define_global kn data
let subst_tacdef (subst, def) =
let expr' = subst_expr subst def.tacdef_expr in
let type' = subst_type_scheme subst def.tacdef_type in
if expr' == def.tacdef_expr && type' == def.tacdef_type then def
else { def with tacdef_expr = expr'; tacdef_type = type' }
let classify_tacdef o = Substitute
let inTacDef : Id.t -> tacdef -> obj =
declare_named_object {(default_object "TAC2-DEFINITION") with
cache_function = cache_tacdef;
load_function = load_tacdef;
open_function = simple_open open_tacdef;
subst_function = subst_tacdef;
classify_function = classify_tacdef}
(** Type definition *)
type typdef = {
typdef_local : bool;
typdef_expr : glb_quant_typedef;
}
let change_kn_label kn id =
let mp = KerName.modpath kn in
KerName.make mp (Label.of_id id)
let change_sp_label sp id =
let (dp, _) = Libnames.repr_path sp in
Libnames.make_path dp id
let push_typedef visibility sp kn (_, def) = match def with
| GTydDef _ ->
Tac2env.push_type visibility sp kn
| GTydAlg { galg_constructors = cstrs } ->
(* Register constructors *)
let iter (c, _) =
let spc = change_sp_label sp c in
let knc = change_kn_label kn c in
Tac2env.push_constructor visibility spc knc
in
Tac2env.push_type visibility sp kn;
List.iter iter cstrs
| GTydRec fields ->
(* Register fields *)
let iter (c, _, _) =
let spc = change_sp_label sp c in
let knc = change_kn_label kn c in
Tac2env.push_projection visibility spc knc
in
Tac2env.push_type visibility sp kn;
List.iter iter fields
| GTydOpn ->
Tac2env.push_type visibility sp kn
let next i =
let ans = !i in
let () = incr i in
ans
let define_typedef kn (params, def as qdef) = match def with
| GTydDef _ ->
Tac2env.define_type kn qdef
| GTydAlg { galg_constructors = cstrs } ->
(* Define constructors *)
let constant = ref 0 in
let nonconstant = ref 0 in
let iter (c, args) =
let knc = change_kn_label kn c in
let tag = if List.is_empty args then next constant else next nonconstant in
let data = {
Tac2env.cdata_prms = params;
cdata_type = kn;
cdata_args = args;
cdata_indx = Some tag;
} in
Tac2env.define_constructor knc data
in
Tac2env.define_type kn qdef;
List.iter iter cstrs
| GTydRec fs ->
(* Define projections *)
let iter i (id, mut, t) =
let knp = change_kn_label kn id in
let proj = {
Tac2env.pdata_prms = params;
pdata_type = kn;
pdata_ptyp = t;
pdata_mutb = mut;
pdata_indx = i;
} in
Tac2env.define_projection knp proj
in
Tac2env.define_type kn qdef;
List.iteri iter fs
| GTydOpn ->
Tac2env.define_type kn qdef
let perform_typdef vs ((sp, kn), def) =
let () = if not def.typdef_local then push_typedef vs sp kn def.typdef_expr in
define_typedef kn def.typdef_expr
let load_typdef i obj = perform_typdef (Until i) obj
let open_typdef i obj = perform_typdef (Exactly i) obj
let cache_typdef ((sp, kn), def) =
let () = push_typedef (Until 1) sp kn def.typdef_expr in
define_typedef kn def.typdef_expr
let subst_typdef (subst, def) =
let expr' = subst_quant_typedef subst def.typdef_expr in
if expr' == def.typdef_expr then def else { def with typdef_expr = expr' }
let classify_typdef o = Substitute
let inTypDef : Id.t -> typdef -> obj =
declare_named_object {(default_object "TAC2-TYPE-DEFINITION") with
cache_function = cache_typdef;
load_function = load_typdef;
open_function = simple_open open_typdef;
subst_function = subst_typdef;
classify_function = classify_typdef}
(** Type extension *)
type extension_data = {
edata_name : Id.t;
edata_args : int glb_typexpr list;
}
type typext = {
typext_local : bool;
typext_prms : int;
typext_type : type_constant;
typext_expr : extension_data list;
}
let push_typext vis prefix def =
let iter data =
let spc = Libnames.make_path prefix.obj_dir data.edata_name in
let knc = KerName.make prefix.obj_mp (Label.of_id data.edata_name) in
Tac2env.push_constructor vis spc knc
in
List.iter iter def.typext_expr
let define_typext mp def =
let iter data =
let knc = KerName.make mp (Label.of_id data.edata_name) in
let cdata = {
Tac2env.cdata_prms = def.typext_prms;
cdata_type = def.typext_type;
cdata_args = data.edata_args;
cdata_indx = None;
} in
Tac2env.define_constructor knc cdata
in
List.iter iter def.typext_expr
let cache_typext (prefix, def) =
let () = define_typext prefix.obj_mp def in
push_typext (Until 1) prefix def
let perform_typext vs (prefix, def) =
let () = if not def.typext_local then push_typext vs prefix def in
define_typext prefix.obj_mp def
let load_typext i obj = perform_typext (Until i) obj
let open_typext i obj = perform_typext (Exactly i) obj
let subst_typext (subst, e) =
let open Mod_subst in
let subst_data data =
let edata_args = List.Smart.map (fun e -> subst_type subst e) data.edata_args in
if edata_args == data.edata_args then data
else { data with edata_args }
in
let typext_type = subst_kn subst e.typext_type in
let typext_expr = List.Smart.map subst_data e.typext_expr in
if typext_type == e.typext_type && typext_expr == e.typext_expr then
e
else
{ e with typext_type; typext_expr }
let classify_typext o = Substitute
let inTypExt : typext -> obj =
declare_named_object_gen {(default_object "TAC2-TYPE-EXTENSION") with
cache_function = cache_typext;
load_function = load_typext;
open_function = simple_open open_typext;
subst_function = subst_typext;
classify_function = classify_typext}
(** Toplevel entries *)
let fresh_var avoid x =
let bad id =
Id.Set.mem id avoid ||
(try ignore (Tac2env.locate_ltac (qualid_of_ident id)); true with Not_found -> false)
in
Namegen.next_ident_away_from (Id.of_string x) bad
let extract_pattern_type ({loc;v=p} as pat) = match p with
| CPatCnv (pat, ty) -> pat, Some ty
| CPatAtm _ | CPatVar _ | CPatRef _ | CPatOr _ | CPatAs _ | CPatRecord _ -> pat, None
(** Mangle recursive tactics *)
let inline_rec_tactic tactics =
let avoid = List.fold_left (fun accu ({v=id}, _) -> Id.Set.add id accu) Id.Set.empty tactics in
let map (id, e) = match e.v with
| CTacFun (pat, _) -> (id, List.map extract_pattern_type pat, e)
| _ ->
user_err ?loc:id.loc (str "Recursive tactic definitions must be functions")
in
let tactics = List.map map tactics in
let map (id, pat, e) =
let fold_var (avoid, ans) (pat, _) =
let id = fresh_var avoid "x" in
let loc = pat.loc in
(Id.Set.add id avoid, CAst.make ?loc id :: ans)
in
(* Fresh variables to abstract over the function patterns *)
let _, vars = List.fold_left fold_var (avoid, []) pat in
let map_body ({loc;v=id}, _, e) = CAst.(make ?loc @@ CPatVar (Name id)), e in
let bnd = List.map map_body tactics in
let pat_of_id {loc;v=id} = CAst.make ?loc @@ CPatVar (Name id) in
let var_of_id {loc;v=id} =
let qid = qualid_of_ident ?loc id in
CAst.make ?loc @@ CTacRef (RelId qid)
in
let loc0 = e.loc in
let vpat = List.map pat_of_id vars in
let varg = List.map var_of_id vars in
let e = CAst.make ?loc:loc0 @@ CTacLet (true, bnd, CAst.make ?loc:loc0 @@ CTacApp (var_of_id id, varg)) in
(id, CAst.make ?loc:loc0 @@ CTacFun (vpat, e))
in
List.map map tactics
let check_lowercase {loc;v=id} =
if Tac2env.is_constructor (Libnames.qualid_of_ident id) then
user_err ?loc (str "The identifier " ++ Id.print id ++ str " must be lowercase")
let check_value ?loc e =
if not (is_value e) then
user_err ?loc
(str "Tactic definition must be a syntactical value." ++ spc() ++
str "Consider using a thunk.")
let register_ltac ?deprecation ?(local = false) ?(mut = false) isrec tactics =
let map ({loc;v=na}, e) =
let id = match na with
| Anonymous ->
user_err ?loc (str "Tactic definition must have a name")
| Name id -> id
in
let () = check_lowercase CAst.(make ?loc id) in
(CAst.(make ?loc id), e)
in
let tactics = List.map map tactics in
let tactics =
if isrec then inline_rec_tactic tactics else tactics
in
let map ({loc;v=id}, ({loc=eloc} as e)) =
let (e, t) = intern ~strict:true [] e in
let () = check_value ?loc:eloc e in
let kn = Lib.make_kn id in
let exists =
try let _ = Tac2env.interp_global kn in true with Not_found -> false
in
let () =
if exists then
user_err ?loc (str "Tactic " ++ Names.Id.print id ++ str " already exists")
in
(id, e, t)
in
let defs = List.map map tactics in
let iter (id, e, t) =
let def = {
tacdef_local = local;
tacdef_mutable = mut;
tacdef_expr = e;
tacdef_type = t;
tacdef_deprecation = deprecation;
} in
Lib.add_leaf (inTacDef id def)
in
List.iter iter defs
let qualid_to_ident qid =
if qualid_is_ident qid then CAst.make ?loc:qid.CAst.loc @@ qualid_basename qid
else user_err ?loc:qid.CAst.loc (str "Identifier expected")
let register_typedef ?(local = false) isrec types =
let same_name ({v=id1}, _) ({v=id2}, _) = Id.equal id1 id2 in
let () = match List.duplicates same_name types with
| [] -> ()
| ({loc;v=id}, _) :: _ ->
user_err ?loc (str "Multiple definition of the type name " ++ Id.print id)
in
let () =
let check_existing_type ({v=id},_) =
let (_, kn) = Lib.make_foname id in
try let _ = Tac2env.interp_type kn in
user_err (str "Multiple definition of the type name " ++ Id.print id)
with Not_found -> ()
in
List.iter check_existing_type types
in
let check ({loc;v=id}, (params, def)) =
let same_name {v=id1} {v=id2} = Id.equal id1 id2 in
let () = match List.duplicates same_name params with
| [] -> ()
| {loc;v=id} :: _ ->
user_err ?loc (str "The type parameter " ++ Id.print id ++
str " occurs several times")
in
match def with
| CTydDef _ ->
if isrec then
user_err ?loc (str "The type abbreviation " ++ Id.print id ++
str " cannot be recursive")
| CTydAlg cs ->
let same_name (id1, _) (id2, _) = Id.equal id1 id2 in
let () = match List.duplicates same_name cs with
| [] -> ()
| (id, _) :: _ ->
user_err (str "Multiple definitions of the constructor " ++ Id.print id)
in
let () =
let check_uppercase_ident (id,_) =
if not (Tac2env.is_constructor_id id)
then user_err (str "Constructor name should start with an uppercase letter " ++ Id.print id)
in
List.iter check_uppercase_ident cs
in
let () =
let check_existing_ctor (id, _) =
let (_, kn) = Lib.make_foname id in
try let _ = Tac2env.interp_constructor kn in
user_err (str "Constructor already defined in this module " ++ Id.print id)
with Not_found -> ()
in
List.iter check_existing_ctor cs
in
()
| CTydRec ps ->
let same_name (id1, _, _) (id2, _, _) = Id.equal id1 id2 in
let () = match List.duplicates same_name ps with
| [] -> ()
| (id, _, _) :: _ ->
user_err (str "Multiple definitions of the projection " ++ Id.print id)
in
()
| CTydOpn ->
if isrec then
user_err ?loc (str "The open type declaration " ++ Id.print id ++
str " cannot be recursive")
in
let () = List.iter check types in
let self =
if isrec then
let fold accu ({v=id}, (params, _)) =
Id.Map.add id (Lib.make_kn id, List.length params) accu
in
List.fold_left fold Id.Map.empty types
else Id.Map.empty
in
let map ({v=id}, def) =
let typdef = {
typdef_local = local;
typdef_expr = intern_typedef self def;
} in
(id, typdef)
in
let types = List.map map types in
let iter (id, def) = Lib.add_leaf (inTypDef id def) in
List.iter iter types
let register_primitive ?deprecation ?(local = false) {loc;v=id} t ml =
let t = intern_open_type t in
let () =
try let _ = Tac2env.interp_primitive ml in () with Not_found ->
user_err ?loc (str "Unregistered primitive " ++
quote (str ml.mltac_plugin) ++ spc () ++ quote (str ml.mltac_tactic))
in
let e = GTacPrm ml in
let def = {
tacdef_local = local;
tacdef_mutable = false;
tacdef_expr = e;
tacdef_type = t;
tacdef_deprecation = deprecation;
} in
Lib.add_leaf (inTacDef id def)
let register_open ?(local = false) qid (params, def) =
let kn =
try Tac2env.locate_type qid
with Not_found ->
user_err ?loc:qid.CAst.loc (str "Unbound type " ++ pr_qualid qid)
in
let (tparams, t) = Tac2env.interp_type kn in
let () = match t with
| GTydOpn -> ()
| GTydAlg _ | GTydRec _ | GTydDef _ ->
user_err ?loc:qid.CAst.loc (str "Type " ++ pr_qualid qid ++ str " is not an open type")
in
let () =
if not (Int.equal (List.length params) tparams) then
Tac2intern.error_nparams_mismatch ?loc:qid.CAst.loc (List.length params) tparams
in
match def with
| CTydOpn -> ()
| CTydAlg def ->
let () =
let same_name (id1, _) (id2, _) = Id.equal id1 id2 in
let () = match List.duplicates same_name def with
| [] -> ()
| (id, _) :: _ ->
user_err (str "Multiple definitions of the constructor " ++ Id.print id)
in
let check_existing_ctor (id, _) =
let (_, kn) = Lib.make_foname id in
try let _ = Tac2env.interp_constructor kn in
user_err (str "Constructor already defined in this module " ++ Id.print id)
with Not_found -> ()
in
let () = List.iter check_existing_ctor def in
()
in
let intern_type t =
let tpe = CTydDef (Some t) in
let (_, ans) = intern_typedef Id.Map.empty (params, tpe) in
match ans with
| GTydDef (Some t) -> t
| _ -> assert false
in
let map (id, tpe) =
if not (Tac2env.is_constructor_id id)
then user_err (str "Constructor name should start with an uppercase letter " ++ Id.print id) ;
let tpe = List.map intern_type tpe in
{ edata_name = id; edata_args = tpe }
in
let def = List.map map def in
let def = {
typext_local = local;
typext_type = kn;
typext_prms = tparams;
typext_expr = def;
} in
Lib.add_leaf (inTypExt def)
| CTydRec _ | CTydDef _ ->
user_err ?loc:qid.CAst.loc (str "Extensions only accept inductive constructors")
let register_type ?local isrec types = match types with
| [qid, true, def] ->
let () = if isrec then user_err ?loc:qid.CAst.loc (str "Extensions cannot be recursive") in
register_open ?local qid def
| _ ->
let map (qid, redef, def) =
let () = if redef then
user_err ?loc:qid.loc (str "Types can only be extended one by one")
in
(qualid_to_ident qid, def)
in
let types = List.map map types in
register_typedef ?local isrec types
(** Parsing *)
type 'a token =
| TacTerm of string
| TacNonTerm of Name.t * 'a
type scope_rule =
| ScopeRule : (raw_tacexpr, _, 'a) Pcoq.Symbol.t * ('a -> raw_tacexpr) -> scope_rule
type scope_interpretation = sexpr list -> scope_rule
let scope_table : scope_interpretation Id.Map.t ref = ref Id.Map.empty
let register_scope id s =
scope_table := Id.Map.add id s !scope_table
module ParseToken =
struct
let loc_of_token = function
| SexprStr {loc} -> loc
| SexprInt {loc} -> loc
| SexprRec (loc, _, _) -> Some loc
let parse_scope = function
| SexprRec (_, {loc;v=Some id}, toks) ->
if Id.Map.mem id !scope_table then
Id.Map.find id !scope_table toks
else
CErrors.user_err ?loc (str "Unknown scope" ++ spc () ++ Names.Id.print id)
| SexprStr {v=str} ->
let v_unit = CAst.make @@ CTacCst (AbsKn (Tuple 0)) in
ScopeRule (Pcoq.Symbol.token (Tok.PIDENT (Some str)), (fun _ -> v_unit))
| tok ->
let loc = loc_of_token tok in
CErrors.user_err ?loc (str "Invalid parsing token")
let parse_token = function
| SexprStr {v=s} -> TacTerm s
| SexprRec (_, na, [tok]) ->
let na = match na.CAst.v with
| None -> Anonymous
| Some id ->
let () = check_lowercase (CAst.make ?loc:na.CAst.loc id) in
Name id
in
let scope = parse_scope tok in
TacNonTerm (na, scope)
| tok ->
let loc = loc_of_token tok in
CErrors.user_err ?loc (str "Invalid parsing token")
let rec print_scope = function
| SexprStr s -> str s.CAst.v
| SexprInt i -> int i.CAst.v
| SexprRec (_, {v=na}, []) -> Option.cata Id.print (str "_") na
| SexprRec (_, {v=na}, e) ->
Option.cata Id.print (str "_") na ++ str "(" ++ pr_sequence print_scope e ++ str ")"
let print_token = function
| SexprStr {v=s} -> quote (str s)
| SexprRec (_, {v=na}, [tok]) -> print_scope tok
| _ -> assert false
end
let parse_scope = ParseToken.parse_scope
type synext = {
synext_kn : KerName.t;
synext_tok : sexpr list;
synext_lev : int;
synext_loc : bool;
synext_depr : Deprecation.t option;
}
type krule =
| KRule :
(raw_tacexpr, _, 'act, Loc.t -> raw_tacexpr) Pcoq.Rule.t *
((Loc.t -> (Name.t * raw_tacexpr) list -> raw_tacexpr) -> 'act) -> krule
let rec get_rule (tok : scope_rule token list) : krule = match tok with
| [] -> KRule (Pcoq.Rule.stop, fun k loc -> k loc [])
| TacNonTerm (na, ScopeRule (scope, inj)) :: tok ->
let KRule (rule, act) = get_rule tok in
let rule = Pcoq.Rule.next rule scope in
let act k e = act (fun loc acc -> k loc ((na, inj e) :: acc)) in
KRule (rule, act)
| TacTerm t :: tok ->
let KRule (rule, act) = get_rule tok in
let rule = Pcoq.(Rule.next rule (Symbol.token (Pcoq.terminal t))) in
let act k _ = act k in
KRule (rule, act)
let deprecated_ltac2_notation =
Deprecation.create_warning
~object_name:"Ltac2 notation"
~warning_name_if_no_since:"deprecated-ltac2-notation"
(fun (toks : sexpr list) -> pr_sequence ParseToken.print_token toks)
(* This is a hack to preserve the level 4 entry which is initially empty. The
grammar engine has the great idea to silently delete empty levels on rule
removal, so we have to work around this using the Pcoq API.
FIXME: we should really keep those levels around instead. *)
let get_reinit = function
| 4 -> Some (Gramlib.Gramext.LeftA, Gramlib.Gramext.After "5")
| _ -> None
let perform_notation syn st =
let tok = List.rev_map ParseToken.parse_token syn.synext_tok in
let KRule (rule, act) = get_rule tok in
let mk loc args =
let () = match syn.synext_depr with
| None -> ()
| Some depr -> deprecated_ltac2_notation ~loc (syn.synext_tok, depr)
in
let map (na, e) =
((CAst.make ?loc:e.loc na), e)
in
let bnd = List.map map args in
CAst.make ~loc @@ CTacSyn (bnd, syn.synext_kn)
in
let rule = Pcoq.Production.make rule (act mk) in
let pos = Some (string_of_int syn.synext_lev) in
let rule = Pcoq.Reuse (pos, [rule]) in
match get_reinit syn.synext_lev with
| None ->
([Pcoq.ExtendRule (Pltac.ltac2_expr, rule)], st)
| Some reinit ->
([Pcoq.ExtendRuleReinit (Pltac.ltac2_expr, reinit, rule)], st)
let ltac2_notation =
Pcoq.create_grammar_command "ltac2-notation" { gext_fun = perform_notation; gext_eq = (==) (* FIXME *) }
let cache_synext syn =
Pcoq.extend_grammar_command ltac2_notation syn
let open_synext i syn =
if Int.equal i 1 then Pcoq.extend_grammar_command ltac2_notation syn
let subst_synext (subst, syn) =
let kn = Mod_subst.subst_kn subst syn.synext_kn in
if kn == syn.synext_kn then syn
else { syn with synext_kn = kn }
let classify_synext o =
if o.synext_loc then Dispose else Substitute
let ltac2_notation_cat = Libobject.create_category "ltac2.notations"
let inTac2Notation : synext -> obj =
declare_object {(default_object "TAC2-NOTATION") with
object_stage = Summary.Stage.Synterp;
cache_function = cache_synext;
open_function = simple_open ~cat:ltac2_notation_cat open_synext;
subst_function = subst_synext;
classify_function = classify_synext}
let cache_synext_interp (local,kn,tac) =
Tac2env.define_notation kn tac
let open_synext_interp i o =
if Int.equal i 1 then cache_synext_interp o
let subst_notation_data subst = function
| Tac2env.UntypedNota body as n ->
let body' = Tac2intern.subst_rawexpr subst body in
if body' == body then n else UntypedNota body'
| TypedNota { nota_prms=prms; nota_argtys=argtys; nota_ty=ty; nota_body=body } as n ->
let body' = Tac2intern.subst_expr subst body in
let argtys' = Id.Map.Smart.map (subst_type subst) argtys in
let ty' = subst_type subst ty in
if body' == body && argtys' == argtys && ty' == ty then n
else TypedNota {nota_body=body'; nota_argtys=argtys'; nota_ty=ty'; nota_prms=prms}
let subst_synext_interp (subst, (local,kn,tac as o)) =
let tac' = subst_notation_data subst tac in
let kn' = Mod_subst.subst_kn subst kn in
if kn' == kn && tac' == tac then o else
(local, kn', tac')
let classify_synext_interp (local,_,_) =
if local then Dispose else Substitute
let inTac2NotationInterp : (bool*KerName.t*Tac2env.notation_data) -> obj =
declare_object {(default_object "TAC2-NOTATION-INTERP") with
cache_function = cache_synext_interp;
open_function = simple_open ~cat:ltac2_notation_cat open_synext_interp;
subst_function = subst_synext_interp;
classify_function = classify_synext_interp}
type abbreviation = {
abbr_body : raw_tacexpr;
abbr_depr : Deprecation.t option;
}
let perform_abbreviation visibility ((sp, kn), abbr) =
let () = Tac2env.push_ltac visibility sp (TacAlias kn) in
Tac2env.define_alias ?deprecation:abbr.abbr_depr kn abbr.abbr_body
let load_abbreviation i obj = perform_abbreviation (Until i) obj
let open_abbreviation i obj = perform_abbreviation (Exactly i) obj
let cache_abbreviation ((sp, kn), abbr) =
let () = Tac2env.push_ltac (Until 1) sp (TacAlias kn) in
Tac2env.define_alias ?deprecation:abbr.abbr_depr kn abbr.abbr_body
let subst_abbreviation (subst, abbr) =
let body' = subst_rawexpr subst abbr.abbr_body in
if body' == abbr.abbr_body then abbr
else { abbr_body = body'; abbr_depr = abbr.abbr_depr }
let classify_abbreviation o = Substitute
let inTac2Abbreviation : Id.t -> abbreviation -> obj =
declare_named_object {(default_object "TAC2-ABBREVIATION") with
cache_function = cache_abbreviation;
load_function = load_abbreviation;
open_function = simple_open ~cat:ltac2_notation_cat open_abbreviation;
subst_function = subst_abbreviation;
classify_function = classify_abbreviation}
let rec string_of_scope = function
| SexprStr s -> Printf.sprintf "str(%s)" s.CAst.v
| SexprInt i -> Printf.sprintf "int(%i)" i.CAst.v
| SexprRec (_, {v=na}, []) -> Option.cata Id.to_string "_" na
| SexprRec (_, {v=na}, e) ->
Printf.sprintf "%s(%s)" (Option.cata Id.to_string "_" na) (String.concat " " (List.map string_of_scope e))
let string_of_token = function
| SexprStr {v=s} -> Printf.sprintf "str(%s)" s
| SexprRec (_, {v=na}, [tok]) -> string_of_scope tok
| _ -> assert false
let make_fresh_key tokens =
let prods = String.concat "_" (List.map string_of_token tokens) in
(* We embed the hash of the kernel name in the label so that the identifier
should be mostly unique. This ensures that including two modules
together won't confuse the corresponding labels. *)
let hash = (ModPath.hash (Lib.current_mp ())) land 0x7FFFFFFF in
let lbl = Id.of_string_soft (Printf.sprintf "%s_%08X" prods hash) in
Lib.make_kn lbl
type notation_interpretation_data =
| Abbreviation of Id.t * Deprecation.t option * raw_tacexpr
| Synext of bool * KerName.t * Id.Set.t * raw_tacexpr
let register_notation atts tkn lev body =
let deprecation, local = Attributes.(parse Notations.(deprecation ++ locality)) atts in
let local = Option.default false local in
match tkn, lev with
| [SexprRec (_, {loc;v=Some id}, [])], None ->
(* Tactic abbreviation *)
let () = check_lowercase CAst.(make ?loc id) in
Abbreviation(id, deprecation, body)
| _ ->
(* Check that the tokens make sense *)
let entries = List.map ParseToken.parse_token tkn in
let fold accu tok = match tok with
| TacTerm _ -> accu
| TacNonTerm (Name id, _) -> Id.Set.add id accu
| TacNonTerm (Anonymous, _) -> accu
in
let ids = List.fold_left fold Id.Set.empty entries in
(* Globalize so that names are absolute *)
let lev = match lev with
| Some n ->
let () =
if n < 0 || n > 6 then
user_err (str "Notation levels must range between 0 and 6")
in
n
| None -> 5
in
let key = make_fresh_key tkn in
let ext = {
synext_kn = key;
synext_tok = tkn;
synext_lev = lev;
synext_loc = local;
synext_depr = deprecation;
} in
Lib.add_leaf (inTac2Notation ext);
Synext (local,key,ids,body)
let register_notation_interpretation = function
| Abbreviation (id, deprecation, body) ->
let body = Tac2intern.globalize Id.Set.empty body in
let abbr = { abbr_body = body; abbr_depr = deprecation } in
Lib.add_leaf (inTac2Abbreviation id abbr)
| Synext (local,kn,ids,body) ->
let data = intern_notation_data ids body in
Lib.add_leaf (inTac2NotationInterp (local,kn,data))
type redefinition = {
redef_kn : ltac_constant;
redef_body : glb_tacexpr;
redef_old : Id.t option;
}
let perform_redefinition redef =
let kn = redef.redef_kn in
let data = Tac2env.interp_global kn in
let body = match redef.redef_old with
| None -> redef.redef_body
| Some id ->
(* Rebind the old value with a let-binding *)
GTacLet (false, [Name id, data.Tac2env.gdata_expr], redef.redef_body)
in
let data = { data with Tac2env.gdata_expr = body } in
Tac2env.define_global kn data
let subst_redefinition (subst, redef) =
let kn = Mod_subst.subst_kn subst redef.redef_kn in
let body = Tac2intern.subst_expr subst redef.redef_body in
if kn == redef.redef_kn && body == redef.redef_body then redef
else { redef_kn = kn; redef_body = body; redef_old = redef.redef_old }
let classify_redefinition o = Substitute
let inTac2Redefinition : redefinition -> obj =
declare_object
{(default_object "TAC2-REDEFINITION") with
cache_function = perform_redefinition;
open_function = simple_open (fun _ -> perform_redefinition);
subst_function = subst_redefinition;
classify_function = classify_redefinition;
}
let register_redefinition qid old ({loc=eloc} as e) =
let kn =
try Tac2env.locate_ltac qid
with Not_found -> user_err ?loc:qid.CAst.loc (str "Unknown tactic " ++ pr_qualid qid)
in
let kn = match kn with
| TacConstant kn -> kn
| TacAlias _ ->
user_err ?loc:qid.CAst.loc (str "Cannot redefine syntactic abbreviations")
in
let data = Tac2env.interp_global kn in
let () =
if not (data.Tac2env.gdata_mutable) then
user_err ?loc:qid.CAst.loc (str "The tactic " ++ pr_qualid qid ++ str " is not declared as mutable")
in
let ctx = match old with
| None -> []
| Some { CAst.v = id } -> [id, data.Tac2env.gdata_type]
in
let (e, t) = intern ~strict:true ctx e in
let () = check_value ?loc:eloc e in
let () =
if not (Tac2intern.check_subtype t data.Tac2env.gdata_type) then
let name = int_name () in
user_err ?loc:qid.CAst.loc (str "Type " ++ pr_glbtype name (snd t) ++
str " is not a subtype of " ++ pr_glbtype name (snd data.Tac2env.gdata_type))
in
let old = Option.map (fun { CAst.v = id } -> id) old in
let def = {
redef_kn = kn;
redef_body = e;
redef_old = old;
} in
Lib.add_leaf (inTac2Redefinition def)
let perform_eval ~pstate e =
let env = Global.env () in
let (e, ty) = Tac2intern.intern ~strict:false [] e in
let v = Tac2interp.interp Tac2interp.empty_environment e in
let selector, proof =
match pstate with
| None ->
let sigma = Evd.from_env env in
let name, poly = Id.of_string "ltac2", false in
Goal_select.SelectAll, Proof.start ~name ~poly sigma []
| Some pstate ->
Goal_select.get_default_goal_selector (),
Declare.Proof.get pstate
in
let nosuchgoal =
let info = Exninfo.reify () in
Proofview.tclZERO ~info (Proof.SuggestNoSuchGoals (1,proof))
in
let v = Goal_select.tclSELECT ~nosuchgoal selector v in
let (proof, _, ans) = Proof.run_tactic (Global.env ()) v proof in
let { Proof.sigma } = Proof.data proof in
let name = int_name () in
Feedback.msg_notice (str "- : " ++ pr_glbtype name (snd ty)
++ spc () ++ str "=" ++ spc () ++
Tac2print.pr_valexpr env sigma ans (snd ty))
(** Toplevel entries *)
let warn_modtype = CWarnings.create ~name:"ltac2-in-modtype" ~category:CWarnings.CoreCategories.ltac2 ~default:AsError
Pp.(fun what -> strbrk "Ltac2 " ++ str what ++ strbrk " should not be defined inside module types: functor application to arguments of this module type will be unchecked")
let check_modtype what =
if Lib.is_modtype ()
then warn_modtype what
let register_struct atts str = match str with
| StrVal (mut, isrec, e) ->
check_modtype "definitions";
let deprecation, local = Attributes.(parse Notations.(deprecation ++ locality)) atts in
register_ltac ?deprecation ?local ~mut isrec e
| StrTyp (isrec, t) ->
check_modtype "types";
let local = Attributes.(parse locality) atts in
register_type ?local isrec t
| StrPrm (id, t, ml) ->
check_modtype "externals";
let deprecation, local = Attributes.(parse Notations.(deprecation ++ locality)) atts in
register_primitive ?deprecation ?local id t ml
| StrMut (qid, old, e) ->
let () = Attributes.unsupported_attributes atts in
register_redefinition qid old e
(** Toplevel exception *)
let pr_frame = function
| FrAnon e -> str "Call {" ++ pr_glbexpr ~avoid:Id.Set.empty e ++ str "}"
| FrLtac kn ->
str "Call " ++ pr_tacref Id.Set.empty kn
| FrPrim ml ->
str "Prim <" ++ str ml.mltac_plugin ++ str ":" ++ str ml.mltac_tactic ++ str ">"
| FrExtn (tag, arg) ->
let obj = Tac2env.interp_ml_object tag in
let env = Global.env () in
let sigma = Evd.from_env env in
str "Extn " ++ str (Tac2dyn.Arg.repr tag) ++ str ":" ++ spc () ++
obj.Tac2env.ml_print env sigma arg
let () = register_handler begin function
| Tac2interp.LtacError (kn, args) ->
let t_exn = KerName.make Tac2env.coq_prefix (Label.make "exn") in
let v = Tac2ffi.of_open (kn, args) in
let t = GTypRef (Other t_exn, []) in
let c = Tac2print.pr_valexpr (Global.env ()) Evd.empty v t in
Some (hov 0 (str "Uncaught Ltac2 exception:" ++ spc () ++ hov 0 c))
| _ -> None
end