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|
(************************************************************************)
(* v * The Coq Proof Assistant / The Coq Development Team *)
(* <O___,, * INRIA - CNRS - LIX - LRI - PPS - Copyright 1999-2017 *)
(* \VV/ **************************************************************)
(* // * This file is distributed under the terms of the *)
(* * GNU Lesser General Public License Version 2.1 *)
(************************************************************************)
open Q_util
let loc = Ploc.dummy
IFDEF STRICT THEN
let ploc_vala x = Ploc.VaVal x
ELSE
let ploc_vala x = x
END
let declare_str_items loc l =
MLast.StDcl (loc, ploc_vala l) (* correspond to <:str_item< declare $list:l'$ end >> *)
let mk_extraarg loc s = <:expr< $lid:"wit_"^s$ >>
let rec make_wit loc = function
| ListArgType t -> <:expr< Genarg.wit_list $make_wit loc t$ >>
| OptArgType t -> <:expr< Genarg.wit_opt $make_wit loc t$ >>
| PairArgType (t1,t2) ->
<:expr< Genarg.wit_pair $make_wit loc t1$ $make_wit loc t2$ >>
| ExtraArgType s -> mk_extraarg loc s
let is_self s = function
| ExtraArgType s' -> s = s'
| _ -> false
let make_rawwit loc arg = <:expr< Genarg.rawwit $make_wit loc arg$ >>
let make_globwit loc arg = <:expr< Genarg.glbwit $make_wit loc arg$ >>
let make_topwit loc arg = <:expr< Genarg.topwit $make_wit loc arg$ >>
let make_act loc act pil =
let rec make = function
| [] -> <:expr< (fun loc -> $act$) >>
| ExtNonTerminal (_, None) :: tl -> <:expr< (fun $lid:"_"$ -> $make tl$) >>
| ExtNonTerminal (_, Some p) :: tl -> <:expr< (fun $lid:p$ -> $make tl$) >>
| ExtTerminal _ :: tl ->
<:expr< (fun _ -> $make tl$) >> in
make (List.rev pil)
let make_prod_item = function
| ExtTerminal s -> <:expr< Extend.Atoken (CLexer.terminal $mlexpr_of_string s$) >>
| ExtNonTerminal (g, _) ->
let base s = <:expr< $lid:s$ >> in
mlexpr_of_prod_entry_key base g
let rec make_prod = function
| [] -> <:expr< Extend.Stop >>
| item :: prods -> <:expr< Extend.Next $make_prod prods$ $make_prod_item item$ >>
let make_rule loc (prods,act) =
<:expr< Extend.Rule $make_prod (List.rev prods)$ $make_act loc act prods$ >>
let is_ident x = function
| <:expr< $lid:s$ >> -> (s : string) = x
| _ -> false
let make_extend loc s cl wit = match cl with
| [[ExtNonTerminal (Uentry e, Some id)], act] when is_ident id act ->
(** Special handling of identity arguments by not redeclaring an entry *)
<:str_item<
value $lid:s$ =
let () = Pcoq.register_grammar $wit$ $lid:e$ in
$lid:e$
>>
| _ ->
let se = mlexpr_of_string s in
let rules = mlexpr_of_list (make_rule loc) (List.rev cl) in
<:str_item<
value $lid:s$ =
let $lid:s$ = Pcoq.create_generic_entry Pcoq.utactic $se$ (Genarg.rawwit $wit$) in
let () = Pcoq.grammar_extend $lid:s$ None (None, [(None, None, $rules$)]) in
$lid:s$ >>
let warning_redundant prefix s =
Printf.eprintf "Redundant [%sTYPED AS] clause in [ARGUMENT EXTEND %s].\n%!" prefix s
let get_type prefix s = function
| None -> None
| Some typ ->
if is_self s typ then
let () = warning_redundant prefix s in None
else Some typ
let check_type prefix s = function
| None -> ()
| Some _ -> warning_redundant prefix s
let declare_tactic_argument loc s (typ, f, g, h) cl =
let se = mlexpr_of_string s in
let rawtyp, rawpr, globtyp, globpr, typ, pr = match typ with
| `Uniform (typ, pr) ->
let typ = get_type "" s typ in
typ, pr, typ, pr, typ, pr
| `Specialized (a, rpr, c, gpr, e, tpr) ->
(** Check that we actually need the TYPED AS arguments *)
let rawtyp = get_type "RAW_" s a in
let glbtyp = get_type "GLOB_" s c in
let toptyp = get_type "" s e in
let () = match g with None -> () | Some _ -> check_type "RAW_" s rawtyp in
let () = match f, h with Some _, Some _ -> check_type "GLOB_" s glbtyp | _ -> () in
rawtyp, rpr, glbtyp, gpr, toptyp, tpr
in
let glob = match g with
| None ->
begin match rawtyp with
| None -> <:expr< fun ist v -> (ist, v) >>
| Some rawtyp ->
<:expr< fun ist v ->
let ans = out_gen $make_globwit loc rawtyp$
(Tacintern.intern_genarg ist
(Genarg.in_gen $make_rawwit loc rawtyp$ v)) in
(ist, ans) >>
end
| Some f ->
<:expr< fun ist v -> (ist, $lid:f$ ist v) >>
in
let interp = match f with
| None ->
begin match globtyp with
| None ->
let typ = match globtyp with None -> ExtraArgType s | Some typ -> typ in
<:expr< fun ist v -> Ftactic.return (Geninterp.Val.inject (Geninterp.val_tag $make_topwit loc typ$) v) >>
| Some globtyp ->
<:expr< fun ist x ->
Tacinterp.interp_genarg ist (Genarg.in_gen $make_globwit loc globtyp$ x) >>
end
| Some f ->
(** Compatibility layer, TODO: remove me *)
let typ = match globtyp with None -> ExtraArgType s | Some typ -> typ in
<:expr<
let f = $lid:f$ in
fun ist v -> Ftactic.nf_enter (fun gl ->
let (sigma, v) = Tacmach.New.of_old (fun gl -> f ist gl v) gl in
let v = Geninterp.Val.inject (Geninterp.val_tag $make_topwit loc typ$) v in
Proofview.tclTHEN (Proofview.Unsafe.tclEVARS sigma) (Ftactic.return v)
)
>> in
let subst = match h with
| None ->
begin match globtyp with
| None -> <:expr< fun s v -> v >>
| Some globtyp ->
<:expr< fun s x ->
out_gen $make_globwit loc globtyp$
(Tacsubst.subst_genarg s
(Genarg.in_gen $make_globwit loc globtyp$ x)) >>
end
| Some f -> <:expr< $lid:f$>> in
let dyn = match typ with
| None -> <:expr< None >>
| Some typ -> <:expr< Some (Geninterp.val_tag $make_topwit loc typ$) >>
in
let wit = <:expr< $lid:"wit_"^s$ >> in
declare_str_items loc
[ <:str_item< value ($lid:"wit_"^s$) = Genarg.make0 $se$ >>;
<:str_item< Genintern.register_intern0 $wit$ $glob$ >>;
<:str_item< Genintern.register_subst0 $wit$ $subst$ >>;
<:str_item< Geninterp.register_interp0 $wit$ $interp$ >>;
<:str_item< Geninterp.register_val0 $wit$ $dyn$ >>;
make_extend loc s cl wit;
<:str_item< do {
Pptactic.declare_extra_genarg_pprule
$wit$ $lid:rawpr$ $lid:globpr$ $lid:pr$;
Tacentries.create_ltac_quotation $se$
(fun (loc, v) -> Tacexpr.TacGeneric (Genarg.in_gen (Genarg.rawwit $wit$) v))
($lid:s$, None)
} >> ]
let declare_vernac_argument loc s pr cl =
let se = mlexpr_of_string s in
let wit = <:expr< $lid:"wit_"^s$ >> in
let pr_rules = match pr with
| None -> <:expr< fun _ _ _ _ -> Pp.str $str:"[No printer for "^s^"]"$ >>
| Some pr -> <:expr< fun _ _ _ -> $lid:pr$ >> in
declare_str_items loc
[ <:str_item<
value ($lid:"wit_"^s$ : Genarg.genarg_type 'a unit unit) =
Genarg.create_arg $se$ >>;
make_extend loc s cl wit;
<:str_item< do {
Pptactic.declare_extra_genarg_pprule $wit$
$pr_rules$
(fun _ _ _ _ -> CErrors.anomaly (Pp.str "vernac argument needs not globwit printer."))
(fun _ _ _ _ -> CErrors.anomaly (Pp.str "vernac argument needs not wit printer.")) }
>> ]
open Pcaml
EXTEND
GLOBAL: str_item;
str_item:
[ [ "ARGUMENT"; "EXTEND"; s = entry_name;
header = argextend_header;
OPT "|"; l = LIST1 argrule SEP "|";
"END" ->
declare_tactic_argument loc s header l
| "VERNAC"; "ARGUMENT"; "EXTEND"; s = entry_name;
pr = OPT ["PRINTED"; "BY"; pr = LIDENT -> pr];
OPT "|"; l = LIST1 argrule SEP "|";
"END" ->
declare_vernac_argument loc s pr l ] ]
;
argextend_specialized:
[ [ rawtyp = OPT [ "RAW_TYPED"; "AS"; rawtyp = argtype -> rawtyp ];
"RAW_PRINTED"; "BY"; rawpr = LIDENT;
globtyp = OPT [ "GLOB_TYPED"; "AS"; globtyp = argtype -> globtyp ];
"GLOB_PRINTED"; "BY"; globpr = LIDENT ->
(rawtyp, rawpr, globtyp, globpr) ] ]
;
argextend_header:
[ [ typ = OPT [ "TYPED"; "AS"; typ = argtype -> typ ];
"PRINTED"; "BY"; pr = LIDENT;
f = OPT [ "INTERPRETED"; "BY"; f = LIDENT -> f ];
g = OPT [ "GLOBALIZED"; "BY"; f = LIDENT -> f ];
h = OPT [ "SUBSTITUTED"; "BY"; f = LIDENT -> f ];
special = OPT argextend_specialized ->
let repr = match special with
| None -> `Uniform (typ, pr)
| Some (rtyp, rpr, gtyp, gpr) -> `Specialized (rtyp, rpr, gtyp, gpr, typ, pr)
in
(repr, f, g, h) ] ]
;
argtype:
[ "2"
[ e1 = argtype; "*"; e2 = argtype -> PairArgType (e1, e2) ]
| "1"
[ e = argtype; LIDENT "list" -> ListArgType e
| e = argtype; LIDENT "option" -> OptArgType e ]
| "0"
[ e = LIDENT ->
let e = parse_user_entry e "" in
type_of_user_symbol e
| "("; e = argtype; ")" -> e ] ]
;
argrule:
[ [ "["; l = LIST0 genarg; "]"; "->"; "["; e = Pcaml.expr; "]" -> (l,e) ] ]
;
genarg:
[ [ e = LIDENT; "("; s = LIDENT; ")" ->
let e = parse_user_entry e "" in
ExtNonTerminal (e, Some s)
| e = LIDENT; "("; s = LIDENT; ","; sep = STRING; ")" ->
let e = parse_user_entry e sep in
ExtNonTerminal (e, Some s)
| e = LIDENT ->
let e = parse_user_entry e "" in
ExtNonTerminal (e, None)
| s = STRING -> ExtTerminal s
] ]
;
entry_name:
[ [ s = LIDENT -> s
| UIDENT -> failwith "Argument entry names must be lowercase"
] ]
;
END
|
