(************************************************************************) (* v * The Coq Proof Assistant / The Coq Development Team *) (* > let plugin_name = <:expr< __coq_plugin_name >> let rec make_patt = function | [] -> <:patt< [] >> | GramNonTerminal(loc',_,_,Some p)::l -> let p = Names.Id.to_string p in <:patt< [ $lid:p$ :: $make_patt l$ ] >> | _::l -> make_patt l let rec make_when loc = function | [] -> <:expr< True >> | GramNonTerminal(loc',t,_,Some p)::l -> let loc' = of_coqloc loc' in let p = Names.Id.to_string p in let l = make_when loc l in let loc = CompatLoc.merge loc' loc in let t = mlexpr_of_argtype loc' t in <:expr< Genarg.argument_type_eq (Genarg.genarg_tag $lid:p$) $t$ && $l$ >> | _::l -> make_when loc l let rec make_let raw e = function | [] -> <:expr< fun $lid:"ist"$ -> $e$ >> | GramNonTerminal(loc,t,_,Some p)::l -> let loc = of_coqloc loc in let p = Names.Id.to_string p in let loc = CompatLoc.merge loc (MLast.loc_of_expr e) in let e = make_let raw e l in let v = if raw then <:expr< Genarg.out_gen $make_rawwit loc t$ $lid:p$ >> else <:expr< Genarg.out_gen $make_topwit loc t$ $lid:p$ >> in <:expr< let $lid:p$ = $v$ in $e$ >> | _::l -> make_let raw e l let rec extract_signature = function | [] -> [] | GramNonTerminal (_,t,_,_) :: l -> t :: extract_signature l | _::l -> extract_signature l let check_unicity s l = let l' = List.map (fun (l,_,_) -> extract_signature l) l in if not (Util.List.distinct l') then Pp.msg_warning (strbrk ("Two distinct rules of tactic entry "^s^" have the same "^ "non-terminals in the same order: put them in distinct tactic entries")) let make_clause (pt,_,e) = (make_patt pt, vala (Some (make_when (MLast.loc_of_expr e) pt)), make_let false e pt) let make_fun_clauses loc s l = check_unicity s l; Compat.make_fun loc (List.map make_clause l) let rec make_args = function | [] -> <:expr< [] >> | GramNonTerminal(loc,t,_,Some p)::l -> let loc = of_coqloc loc in let p = Names.Id.to_string p in <:expr< [ Genarg.in_gen $make_topwit loc t$ $lid:p$ :: $make_args l$ ] >> | _::l -> make_args l let mlexpr_terminals_of_grammar_tactic_prod_item_expr = function | GramTerminal s -> <:expr< Some $mlexpr_of_string s$ >> | GramNonTerminal (loc,nt,_,sopt) -> let loc = of_coqloc loc in <:expr< None >> let make_prod_item = function | GramTerminal s -> <:expr< Egramml.GramTerminal $str:s$ >> | GramNonTerminal (loc,nt,g,sopt) -> let loc = of_coqloc loc in <:expr< Egramml.GramNonTerminal $default_loc$ $mlexpr_of_argtype loc nt$ $mlexpr_of_prod_entry_key g$ $mlexpr_of_option mlexpr_of_ident sopt$ >> let mlexpr_of_clause = mlexpr_of_list (fun (a,_,b) -> mlexpr_of_list make_prod_item a) let rec make_tags loc = function | [] -> <:expr< [] >> | GramNonTerminal(loc',t,_,Some p)::l -> let loc' = of_coqloc loc' in let l = make_tags loc l in let loc = CompatLoc.merge loc' loc in let t = mlexpr_of_argtype loc' t in <:expr< [ $t$ :: $l$ ] >> | _::l -> make_tags loc l let make_one_printing_rule se (pt,_,e) = let level = mlexpr_of_int 0 in (* only level 0 supported here *) let loc = MLast.loc_of_expr e in let prods = mlexpr_of_list mlexpr_terminals_of_grammar_tactic_prod_item_expr pt in <:expr< ($se$, { Pptactic.pptac_args = $make_tags loc pt$; pptac_prods = ($level$, $prods$) }) >> let make_printing_rule se = mlexpr_of_list (make_one_printing_rule se) let make_empty_check = function | GramNonTerminal(_, t, e, _)-> let is_extra = match t with ExtraArgType _ -> true | _ -> false in if is_possibly_empty e || is_extra then (* This possibly parses epsilon *) let wit = make_wit loc t in let rawwit = make_rawwit loc t in <:expr< match Genarg.default_empty_value $wit$ with [ None -> raise Exit | Some v -> Tacintern.intern_genarg Tacintern.fully_empty_glob_sign (Genarg.in_gen $rawwit$ v) ] >> else (* This does not parse epsilon (this Exit is static time) *) raise Exit | GramTerminal _ -> (* Idem *) raise Exit let rec possibly_empty_subentries loc = function | [] -> [] | (s,prodsl) :: l -> let rec aux = function | [] -> (false,<:expr< None >>) | prods :: rest -> try let l = List.map make_empty_check prods in if has_extraarg prods then (true,<:expr< try Some $mlexpr_of_list (fun x -> x) l$ with [ Exit -> $snd (aux rest)$ ] >>) else (true, <:expr< Some $mlexpr_of_list (fun x -> x) l$ >>) with Exit -> aux rest in let (nonempty,v) = aux prodsl in if nonempty then (s,v) :: possibly_empty_subentries loc l else possibly_empty_subentries loc l let possibly_atomic loc prods = let l = List.map_filter (function | GramTerminal s :: l, _, _ -> Some (s,l) | _ -> None) prods in possibly_empty_subentries loc (List.factorize_left String.equal l) (** Special treatment of constr entries *) let is_constr_gram = function | GramTerminal _ -> false | GramNonTerminal (_, _, e, _) -> match e with | Aentry ("constr", "constr") -> true | _ -> false let make_var = function | GramNonTerminal(loc',_,_,Some p) -> Some p | GramNonTerminal(loc',_,_,None) -> Some (Id.of_string "_") | _ -> assert false let declare_tactic loc s c cl = match cl with | [(GramTerminal name) :: rem, _, tac] when List.for_all is_constr_gram rem -> (** The extension is only made of a name followed by constr entries: we do not add any grammar nor printing rule and add it as a true Ltac definition. *) let patt = make_patt rem in let vars = List.map make_var rem in let vars = mlexpr_of_list (mlexpr_of_option mlexpr_of_ident) vars in let entry = mlexpr_of_string s in let se = <:expr< { Tacexpr.mltac_tactic = $entry$; Tacexpr.mltac_plugin = $plugin_name$ } >> in let name = mlexpr_of_string name in let tac = (** Special handling of tactics without arguments: such tactics do not do a Proofview.Goal.nf_enter to compute their arguments. It matters for some whole-prof tactics like [shelve_unifiable]. *) if List.is_empty rem then <:expr< fun _ $lid:"ist"$ -> $tac$ >> else let f = Compat.make_fun loc [patt, vala None, <:expr< fun $lid:"ist"$ -> $tac$ >>] in <:expr< Tacinterp.lift_constr_tac_to_ml_tac $vars$ $f$ >> in (** Arguments are not passed directly to the ML tactic in the TacML node, the ML tactic retrieves its arguments in the [ist] environment instead. This is the rôle of the [lift_constr_tac_to_ml_tac] function. *) let body = <:expr< Tacexpr.TacFun ($vars$, Tacexpr.TacML ($dloc$, $se$, [])) >> in let name = <:expr< Names.Id.of_string $name$ >> in declare_str_items loc [ <:str_item< do { let obj () = Tacenv.register_ltac True False $name$ $body$ in try do { Tacenv.register_ml_tactic $se$ $tac$; Mltop.declare_cache_obj obj $plugin_name$; } with [ e when Errors.noncritical e -> Pp.msg_warning (Pp.app (Pp.str ("Exception in tactic extend " ^ $entry$ ^": ")) (Errors.print e)) ]; } >> ] | _ -> (** Otherwise we add parsing and printing rules to generate a call to a TacML tactic. *) let entry = mlexpr_of_string s in let se = <:expr< { Tacexpr.mltac_tactic = $entry$; Tacexpr.mltac_plugin = $plugin_name$ } >> in let pp = make_printing_rule se cl in let gl = mlexpr_of_clause cl in let atom = mlexpr_of_list (mlexpr_of_pair mlexpr_of_string (fun x -> x)) (possibly_atomic loc cl) in let obj = <:expr< fun () -> Metasyntax.add_ml_tactic_notation $se$ $gl$ $atom$ >> in declare_str_items loc [ <:str_item< do { try do { Tacenv.register_ml_tactic $se$ $make_fun_clauses loc s cl$; Mltop.declare_cache_obj $obj$ $plugin_name$; List.iter (fun (s, r) -> Pptactic.declare_ml_tactic_pprule s r) $pp$; } with [ e when Errors.noncritical e -> Pp.msg_warning (Pp.app (Pp.str ("Exception in tactic extend " ^ $entry$ ^": ")) (Errors.print e)) ]; } >> ] open Pcaml open PcamlSig (* necessary for camlp4 *) EXTEND GLOBAL: str_item; str_item: [ [ "TACTIC"; "EXTEND"; s = tac_name; c = OPT [ "CLASSIFIED"; "BY"; c = LIDENT -> <:expr< $lid:c$ >> ]; OPT "|"; l = LIST1 tacrule SEP "|"; "END" -> declare_tactic loc s c l ] ] ; tacrule: [ [ "["; l = LIST1 tacargs; "]"; c = OPT [ "=>"; "["; c = Pcaml.expr; "]" -> c ]; "->"; "["; e = Pcaml.expr; "]" -> (match l with | GramNonTerminal _ :: _ -> (* En attendant la syntaxe de tacticielles *) failwith "Tactic syntax must start with an identifier" | _ -> (l,c,e)) ] ] ; tacargs: [ [ e = LIDENT; "("; s = LIDENT; ")" -> let t, g = interp_entry_name false None e "" in GramNonTerminal (!@loc, t, g, Some (Names.Id.of_string s)) | e = LIDENT; "("; s = LIDENT; ","; sep = STRING; ")" -> let t, g = interp_entry_name false None e sep in GramNonTerminal (!@loc, t, g, Some (Names.Id.of_string s)) | s = STRING -> if String.is_empty s then Errors.user_err_loc (!@loc,"",Pp.str "Empty terminal."); GramTerminal s ] ] ; tac_name: [ [ s = LIDENT -> s | s = UIDENT -> s ] ] ; END