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|
(************************************************************************)
(* * The Coq Proof Assistant / The Coq Development Team *)
(* v * INRIA, CNRS and contributors - Copyright 1999-2018 *)
(* <O___,, * (see CREDITS file for the list of authors) *)
(* \VV/ **************************************************************)
(* // * This file is distributed under the terms of the *)
(* * GNU Lesser General Public License Version 2.1 *)
(* * (see LICENSE file for the text of the license) *)
(************************************************************************)
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 declare_arg loc s e =
declare_str_items loc [
<:str_item< value ($lid:"wit_"^s$, $lid:s$) = $e$ >>;
(** Prevent the unused variable warning *)
<:str_item< value _ = ($lid:"wit_"^s$, $lid:s$) >>;
]
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 self = function
| ExtTerminal s -> <:expr< Extend.Atoken (CLexer.terminal $mlexpr_of_string s$) >>
| ExtNonTerminal (Uentry e, _) when e = self -> <:expr< Extend.Aself >>
| ExtNonTerminal (g, _) ->
let base s = <:expr< $lid:s$ >> in
mlexpr_of_prod_entry_key base g
let rec make_prod self = function
| [] -> <:expr< Extend.Stop >>
| item :: prods -> <:expr< Extend.Next $make_prod self prods$ $make_prod_item self item$ >>
let make_rule loc self (prods,act) =
<:expr< Extend.Rule $make_prod self (List.rev prods)$ $make_act loc act prods$ >>
let is_ident x = function
| <:expr< $lid:s$ >> -> (s : string) = x
| _ -> false
let make_extend loc self cl = match cl with
| [[ExtNonTerminal (Uentry e, Some id)], act] when is_ident id act ->
(** Special handling of identity arguments by not redeclaring an entry *)
<:expr< Vernacextend.Arg_alias $lid:e$ >>
| _ ->
<:expr< Vernacextend.Arg_rules $mlexpr_of_list (make_rule loc self) (List.rev cl)$ >>
let warning_deprecated prefix s = function
| None -> ()
| Some _ ->
Printf.eprintf "Deprecated [%sTYPED AS] clause in [ARGUMENT EXTEND %s]. \
Use [TYPED AS] instead.\n%!" prefix s
let get_type s = function
| None -> None
| Some typ ->
if is_self s typ then
let () = Printf.eprintf "Redundant [TYPED AS] clause in [ARGUMENT EXTEND %s].\n%!" s in
None
else Some typ
let declare_tactic_argument loc s (typ, f, g, h) cl =
let se = mlexpr_of_string s in
let typ, pr = match typ with
| `Uniform (typ, pr) ->
let typ = get_type s typ in
typ, <:expr< ($lid:pr$, $lid:pr$, $lid:pr$) >>
| `Specialized (a, rpr, c, gpr, e, tpr) ->
let () = warning_deprecated "RAW_" s a in
let () = warning_deprecated "GLOB_" s c in
let typ = get_type s e in
typ, <:expr< ($lid:rpr$, $lid:gpr$, $lid:tpr$) >>
in
let glob = match g, typ with
| Some f, (None | Some _) ->
<:expr< Tacentries.ArgInternFun (fun ist v -> (ist, $lid:f$ ist v)) >>
| None, Some typ ->
<:expr< Tacentries.ArgInternWit $make_wit loc typ$ >>
| None, None ->
<:expr< Tacentries.ArgInternFun (fun ist v -> (ist, v)) >>
in
let interp = match f, typ with
| Some f, (None | Some _) ->
<:expr< Tacentries.ArgInterpLegacy $lid:f$ >>
| None, Some typ ->
<:expr< Tacentries.ArgInterpWit $make_wit loc typ$ >>
| None, None ->
<:expr< Tacentries.ArgInterpRet >>
in
let subst = match h, typ with
| Some f, (None | Some _) ->
<:expr< Tacentries.ArgSubstFun $lid:f$ >>
| None, Some typ ->
<:expr< Tacentries.ArgSubstWit $make_wit loc typ$ >>
| None, None ->
<:expr< Tacentries.ArgSubstFun (fun s v -> v) >>
in
let dyn = mlexpr_of_option (fun typ -> <:expr< Geninterp.val_tag $make_topwit loc typ$ >>) typ in
declare_arg loc s <:expr< Tacentries.argument_extend ~{ name = $se$ } {
Tacentries.arg_parsing = $make_extend loc s cl$;
Tacentries.arg_tag = $dyn$;
Tacentries.arg_intern = $glob$;
Tacentries.arg_subst = $subst$;
Tacentries.arg_interp = $interp$;
Tacentries.arg_printer = $pr$
} >>
let declare_vernac_argument loc s pr cl =
let se = mlexpr_of_string s in
let pr_rules = match pr with
| None -> <:expr< fun _ -> Pp.str $str:"[No printer for "^s^"]"$ >>
| Some pr -> <:expr< $lid:pr$ >> in
declare_arg loc s <:expr< Vernacextend.vernac_argument_extend ~{ name = $se$ } {
Vernacextend.arg_printer = $pr_rules$;
Vernacextend.arg_parsing = $make_extend loc s cl$
} >>
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
|
