+let parse_syntax_pattern stream =
+ exc_located_wrapper (fun () -> Grammar.Entry.parse level1_pattern stream)
+
+let parse_ast_pattern stream =
+ exc_located_wrapper (fun () -> Grammar.Entry.parse level2_pattern stream)
+
+let parse_interpretation stream =
+ exc_located_wrapper (fun () -> Grammar.Entry.parse level3_term stream)
+
+(** {2 Grammar extension} *)
+
+type associativity_kind = [ `Left | `Right | `None ]
+
+let symbol s = Gramext.Stoken ("SYMBOL", s)
+let ident s = Gramext.Stoken ("IDENT", s)
+let number s = Gramext.Stoken ("NUMBER", s)
+let term = Gramext.Sself
+
+let g_symbol_of_literal =
+ function
+ | `Symbol s -> symbol s
+ | `Keyword s -> ident s
+ | `Number s -> number s
+
+type env_type = (string * (value_type * value)) list
+
+type binding =
+ | NoBinding
+ | Binding of string * value_type
+ | Env of (string * value_type) list
+
+let rec pp_value =
+ function
+(* | TermValue (CicNotationPt.AttributedTerm (_, CicNotationPt.Num (s, _)))
+ | TermValue (CicNotationPt.Num (s, _)) ->
+ sprintf "@TERM[%s]@" s *)
+ | TermValue _ -> "@TERM@"
+ | StringValue s -> sprintf "\"%s\"" s
+ | NumValue n -> n
+ | OptValue (Some v) -> "Some " ^ pp_value v
+ | OptValue None -> "None"
+ | ListValue l -> sprintf "[%s]" (String.concat "; " (List.map pp_value l))
+
+let rec pp_value_type =
+ function
+ | TermType -> "Term"
+ | StringType -> "String"
+ | NumType -> "Number"
+ | OptType t -> "Maybe " ^ pp_value_type t
+ | ListType l -> "List " ^ pp_value_type l
+
+let pp_env env =
+ String.concat "; "
+ (List.map
+ (fun (name, (ty, value)) ->
+ sprintf "%s : %s = %s" name (pp_value_type ty) (pp_value value))
+ env)
+
+let make_action action bindings =
+ let rec aux (vl : env_type) =
+ function
+ [] ->
+ prerr_endline "aux: make_action";
+ Gramext.action (fun (loc: location) -> action vl loc)
+ | NoBinding :: tl ->
+ prerr_endline "aux: none";
+ Gramext.action (fun _ -> aux vl tl)
+ (* LUCA: DEFCON 2 BEGIN *)
+ | Binding (name, TermType) :: tl ->
+ prerr_endline "aux: term";
+ Gramext.action
+ (fun (v:term) -> aux ((name, (TermType, (TermValue v)))::vl) tl)
+ | Binding (name, StringType) :: tl ->
+ prerr_endline "aux: string";
+ Gramext.action
+ (fun (v:string) ->
+ aux ((name, (StringType, (StringValue v))) :: vl) tl)
+ | Binding (name, NumType) :: tl ->
+ prerr_endline "aux: num";
+ Gramext.action
+ (fun (v:string) -> aux ((name, (NumType, (NumValue v))) :: vl) tl)
+ | Binding (name, OptType t) :: tl ->
+ prerr_endline "aux: opt";
+ Gramext.action
+ (fun (v:'a option) ->
+ aux ((name, (OptType t, (OptValue v))) :: vl) tl)
+ | Binding (name, ListType t) :: tl ->
+ prerr_endline "aux: list";
+ Gramext.action
+ (fun (v:'a list) ->
+ aux ((name, (ListType t, (ListValue v))) :: vl) tl)
+ | Env _ :: tl ->
+ prerr_endline "aux: env";
+ Gramext.action (fun (v:env_type) -> aux (v @ vl) tl)
+ (* LUCA: DEFCON 2 END *)
+ in
+ aux [] (List.rev bindings)
+
+let flatten_opt =
+ let rec aux acc =
+ function
+ [] -> List.rev acc
+ | NoBinding :: tl -> aux acc tl
+ | Env names :: tl -> aux (List.rev names @ acc) tl
+ | Binding (name, ty) :: tl -> aux ((name, ty) :: acc) tl
+ in
+ aux []
+
+let opt_binding_some (n, (ty, v)) = (n, (OptType ty, OptValue (Some v)))
+let opt_binding_none (n, (ty, v)) = (n, (OptType ty, OptValue None))
+
+let opt_binding_of_name (n, ty) = (n, (OptType ty, OptValue None))
+let list_binding_of_name (n, ty) = (n, (ListType ty, ListValue []))
+
+let opt_name (n, ty) = (n, OptType ty)
+let list_name (n, ty) = (n, ListType ty)
+
+ (* given a level 1 pattern computes the new RHS of "term" grammar entry *)
+let extract_term_production pattern =
+ let rec aux = function
+ | Literal l -> aux_literal l
+ | Layout l -> aux_layout l
+ | Magic m -> aux_magic m
+ | Variable v -> aux_variable v
+ | _ -> assert false
+ and aux_literal =
+ function
+ | `Symbol s -> [NoBinding, symbol s]
+ | `Keyword s -> [NoBinding, ident s]
+ | `Number s -> [NoBinding, number s]
+ and aux_layout = function
+ | Sub (p1, p2) -> aux p1 @ [NoBinding, symbol "\\SUB"] @ aux p2
+ | Sup (p1, p2) -> aux p1 @ [NoBinding, symbol "\\SUP"] @ aux p2
+ | Below (p1, p2) -> aux p1 @ [NoBinding, symbol "\\BELOW"] @ aux p2
+ | Above (p1, p2) -> aux p1 @ [NoBinding, symbol "\\ABOVE"] @ aux p2
+ | Frac (p1, p2) -> aux p1 @ [NoBinding, symbol "\\FRAC"] @ aux p2
+ | Atop (p1, p2) -> aux p1 @ [NoBinding, symbol "\\ATOP"] @ aux p2
+ | Over (p1, p2) -> aux p1 @ [NoBinding, symbol "\\OVER"] @ aux p2
+ | Root (p1, p2) ->
+ [NoBinding, symbol "\\ROOT"] @ aux p2 @ [NoBinding, symbol "\\OF"]
+ @ aux p1
+ | Sqrt p -> [NoBinding, symbol "\\SQRT"] @ aux p
+ | Break -> []
+ | Box (_, pl) -> List.flatten (List.map aux pl)
+ and aux_magic magic =
+ match magic with
+ | Opt p ->
+ let p_bindings, p_atoms, p_names, p_action = inner_pattern p in
+ let action (env_opt : env_type option) (loc : location) =
+ match env_opt with
+ | Some env -> List.map opt_binding_some env
+ | None -> List.map opt_binding_of_name p_names
+ in
+ [ Env (List.map opt_name p_names),
+ Gramext.srules
+ [ [ Gramext.Sopt (Gramext.srules [ p_atoms, p_action ]) ],
+ Gramext.action action ] ]
+ | List0 (p, _)
+ | List1 (p, _) ->
+ let p_bindings, p_atoms, p_names, p_action = inner_pattern p in
+ let env0 = List.map list_binding_of_name p_names in
+ let grow_env_entry env n v =
+ prerr_endline "grow_env_entry";
+ List.map
+ (function
+ | (n', (ty, ListValue vl)) as entry ->
+ if n' = n then n', (ty, ListValue (v :: vl)) else entry
+ | _ -> assert false)
+ env
+ in
+ let grow_env env_i env =
+ prerr_endline "grow_env";
+ List.fold_left
+ (fun env (n, (_, v)) -> grow_env_entry env n v)
+ env env_i
+ in
+ let action (env_list : env_type list) (loc : location) =
+ prerr_endline "list action";
+ List.fold_right grow_env env_list env0
+ in
+ let g_symbol s =
+ match magic with
+ | List0 (_, None) -> Gramext.Slist0 s
+ | List1 (_, None) -> Gramext.Slist1 s
+ | List0 (_, Some l) -> Gramext.Slist0sep (s, g_symbol_of_literal l)
+ | List1 (_, Some l) -> Gramext.Slist1sep (s, g_symbol_of_literal l)
+ | _ -> assert false
+ in
+ [ Env (List.map list_name p_names),
+ Gramext.srules
+ [ [ g_symbol (Gramext.srules [ p_atoms, p_action ]) ],
+ Gramext.action action ] ]
+ | _ -> assert false
+ and aux_variable =
+ function
+ | NumVar s -> [Binding (s, NumType), number ""]
+ | TermVar s -> [Binding (s, TermType), term]
+ | IdentVar s -> [Binding (s, StringType), ident ""]
+ | Ascription (p, s) -> assert false (* TODO *)
+ | FreshVar _ -> assert false
+ and inner_pattern p =
+ let p_bindings, p_atoms = List.split (aux p) in
+ let p_names = flatten_opt p_bindings in
+ let _ = prerr_endline ("inner names: " ^ String.concat " " (List.map fst p_names)) in
+ let action =
+ make_action (fun (env : env_type) (loc : location) -> prerr_endline "inner action"; env) p_bindings
+ in
+ p_bindings, p_atoms, p_names, action
+ in
+ aux pattern
+
+let level_of_int precedence =
+ (* TODO "mod" test to be removed as soon as we add all 100 levels *)
+ if precedence mod 10 <> 0 || precedence < 0 || precedence > 100 then
+ raise (Level_not_found precedence);
+ string_of_int precedence
+
+type rule_id = Token.t Gramext.g_symbol list
+
+let extend level1_pattern ?(precedence = 0) ?associativity action =
+ let p_bindings, p_atoms =
+ List.split (extract_term_production level1_pattern)
+ in
+ let level = level_of_int precedence in
+ let p_names = flatten_opt p_bindings in
+ let entry = Grammar.Entry.obj (l2_pattern: 'a Grammar.Entry.e) in
+ let _ =
+ prerr_endline (string_of_int (List.length p_bindings));
+ Grammar.extend
+ [ entry, Some (Gramext.Level level),
+ [ Some level, (* TODO should we put None here? *)
+ associativity,
+ [ p_atoms,
+ (make_action
+ (fun (env: env_type) (loc: location) -> (action env loc))
+ p_bindings) ]]]
+ in
+ p_atoms
+
+let delete atoms = Grammar.delete_rule l2_pattern atoms
+
+let print_l2_pattern () =
+ Grammar.print_entry Format.std_formatter (Grammar.Entry.obj l2_pattern);
+ Format.pp_print_flush Format.std_formatter ();
+ flush stdout