wenzelm@42243: (*  Title:      Pure/Syntax/syntax_phases.ML
wenzelm@42241:     Author:     Makarius
wenzelm@42241: 
wenzelm@42243: Main phases of inner syntax processing, with standard implementations
wenzelm@42243: of parse/unparse operations.
wenzelm@42241: *)
wenzelm@42241: 
wenzelm@42243: signature SYNTAX_PHASES =
wenzelm@42242: sig
wenzelm@42242:   val term_sorts: term -> (indexname * sort) list
wenzelm@42242:   val typ_of_term: (indexname -> sort) -> term -> typ
wenzelm@42242:   val decode_term: Proof.context ->
wenzelm@42242:     Position.reports * term Exn.result -> Position.reports * term Exn.result
wenzelm@42242:   val parse_ast_pattern: Proof.context -> string * string -> Ast.ast
wenzelm@42247:   val term_of_typ: Proof.context -> typ -> term
wenzelm@42242: end
wenzelm@42242: 
wenzelm@42243: structure Syntax_Phases: SYNTAX_PHASES =
wenzelm@42241: struct
wenzelm@42241: 
wenzelm@42298: (** markup logical entities **)
wenzelm@42298: 
wenzelm@42298: fun markup_class ctxt c =
wenzelm@42298:   [Name_Space.markup_entry (Type.class_space (ProofContext.tsig_of ctxt)) c];
wenzelm@42298: 
wenzelm@42298: fun markup_type ctxt c =
wenzelm@42298:   [Name_Space.markup_entry (Type.type_space (ProofContext.tsig_of ctxt)) c];
wenzelm@42298: 
wenzelm@42298: fun markup_const ctxt c =
wenzelm@42298:   [Name_Space.markup_entry (Consts.space_of (ProofContext.consts_of ctxt)) c];
wenzelm@42298: 
wenzelm@42298: fun markup_free ctxt x =
wenzelm@42298:   [if can Name.dest_skolem x then Markup.skolem else Markup.free] @
wenzelm@42298:   (if not (Variable.is_body ctxt) orelse Variable.is_fixed ctxt x then []
wenzelm@42298:    else [Markup.hilite]);
wenzelm@42298: 
wenzelm@42298: fun markup_var xi = [Markup.name (Term.string_of_vname xi) Markup.var];
wenzelm@42298: 
wenzelm@42298: fun markup_bound def id =
wenzelm@42298:   [Markup.properties [(if def then Markup.defN else Markup.refN, id)] Markup.bound];
wenzelm@42298: 
wenzelm@42298: fun markup_entity ctxt c =
wenzelm@42298:   (case Syntax.lookup_const (ProofContext.syn_of ctxt) c of
wenzelm@42298:     SOME "" => []
wenzelm@42298:   | SOME b => markup_entity ctxt b
wenzelm@42298:   | NONE => c |> Lexicon.unmark
wenzelm@42298:      {case_class = markup_class ctxt,
wenzelm@42298:       case_type = markup_type ctxt,
wenzelm@42298:       case_const = markup_const ctxt,
wenzelm@42298:       case_fixed = markup_free ctxt,
wenzelm@42298:       case_default = K []});
wenzelm@42298: 
wenzelm@42298: 
wenzelm@42298: 
wenzelm@42242: (** decode parse trees **)
wenzelm@42242: 
wenzelm@42242: (* sort_of_term *)
wenzelm@42242: 
wenzelm@42242: fun sort_of_term tm =
wenzelm@42242:   let
wenzelm@42242:     fun err () = raise TERM ("sort_of_term: bad encoding of classes", [tm]);
wenzelm@42242: 
wenzelm@42242:     fun class s = Lexicon.unmark_class s handle Fail _ => err ();
wenzelm@42242: 
wenzelm@42242:     fun classes (Const (s, _)) = [class s]
wenzelm@42242:       | classes (Const ("_classes", _) $ Const (s, _) $ cs) = class s :: classes cs
wenzelm@42242:       | classes _ = err ();
wenzelm@42242: 
wenzelm@42242:     fun sort (Const ("_topsort", _)) = []
wenzelm@42242:       | sort (Const (s, _)) = [class s]
wenzelm@42242:       | sort (Const ("_sort", _) $ cs) = classes cs
wenzelm@42242:       | sort _ = err ();
wenzelm@42242:   in sort tm end;
wenzelm@42242: 
wenzelm@42242: 
wenzelm@42242: (* term_sorts *)
wenzelm@42242: 
wenzelm@42242: fun term_sorts tm =
wenzelm@42242:   let
wenzelm@42242:     val sort_of = sort_of_term;
wenzelm@42242: 
wenzelm@42242:     fun add_env (Const ("_ofsort", _) $ Free (x, _) $ cs) =
wenzelm@42242:           insert (op =) ((x, ~1), sort_of cs)
wenzelm@42242:       | add_env (Const ("_ofsort", _) $ (Const ("_tfree", _) $ Free (x, _)) $ cs) =
wenzelm@42242:           insert (op =) ((x, ~1), sort_of cs)
wenzelm@42242:       | add_env (Const ("_ofsort", _) $ Var (xi, _) $ cs) =
wenzelm@42242:           insert (op =) (xi, sort_of cs)
wenzelm@42242:       | add_env (Const ("_ofsort", _) $ (Const ("_tvar", _) $ Var (xi, _)) $ cs) =
wenzelm@42242:           insert (op =) (xi, sort_of cs)
wenzelm@42242:       | add_env (Abs (_, _, t)) = add_env t
wenzelm@42242:       | add_env (t1 $ t2) = add_env t1 #> add_env t2
wenzelm@42242:       | add_env _ = I;
wenzelm@42242:   in add_env tm [] end;
wenzelm@42242: 
wenzelm@42242: 
wenzelm@42242: (* typ_of_term *)
wenzelm@42242: 
wenzelm@42242: fun typ_of_term get_sort tm =
wenzelm@42242:   let
wenzelm@42242:     fun err () = raise TERM ("typ_of_term: bad encoding of type", [tm]);
wenzelm@42242: 
wenzelm@42242:     fun typ_of (Free (x, _)) = TFree (x, get_sort (x, ~1))
wenzelm@42242:       | typ_of (Var (xi, _)) = TVar (xi, get_sort xi)
wenzelm@42242:       | typ_of (Const ("_tfree",_) $ (t as Free _)) = typ_of t
wenzelm@42242:       | typ_of (Const ("_tvar",_) $ (t as Var _)) = typ_of t
wenzelm@42242:       | typ_of (Const ("_ofsort", _) $ Free (x, _) $ _) = TFree (x, get_sort (x, ~1))
wenzelm@42242:       | typ_of (Const ("_ofsort", _) $ (Const ("_tfree",_) $ Free (x, _)) $ _) =
wenzelm@42242:           TFree (x, get_sort (x, ~1))
wenzelm@42242:       | typ_of (Const ("_ofsort", _) $ Var (xi, _) $ _) = TVar (xi, get_sort xi)
wenzelm@42242:       | typ_of (Const ("_ofsort", _) $ (Const ("_tvar",_) $ Var (xi, _)) $ _) =
wenzelm@42242:           TVar (xi, get_sort xi)
wenzelm@42242:       | typ_of (Const ("_dummy_ofsort", _) $ t) = TFree ("'_dummy_", sort_of_term t)
wenzelm@42242:       | typ_of t =
wenzelm@42242:           let
wenzelm@42242:             val (head, args) = Term.strip_comb t;
wenzelm@42242:             val a =
wenzelm@42242:               (case head of
wenzelm@42242:                 Const (c, _) => (Lexicon.unmark_type c handle Fail _ => err ())
wenzelm@42242:               | _ => err ());
wenzelm@42242:           in Type (a, map typ_of args) end;
wenzelm@42242:   in typ_of tm end;
wenzelm@42242: 
wenzelm@42242: 
wenzelm@42242: (* parsetree_to_ast *)
wenzelm@42242: 
wenzelm@42242: fun parsetree_to_ast ctxt constrain_pos trf parsetree =
wenzelm@42242:   let
wenzelm@42250:     val get_class = ProofContext.read_class ctxt;
wenzelm@42250:     val get_type = #1 o dest_Type o ProofContext.read_type_name_proper ctxt false;
wenzelm@42282: 
wenzelm@42242:     val reports = Unsynchronized.ref ([]: Position.reports);
wenzelm@42242:     fun report pos = Position.reports reports [pos];
wenzelm@42242: 
wenzelm@42242:     fun trans a args =
wenzelm@42242:       (case trf a of
wenzelm@42242:         NONE => Ast.mk_appl (Ast.Constant a) args
wenzelm@42242:       | SOME f => f ctxt args);
wenzelm@42242: 
wenzelm@42282:     fun asts_of (Parser.Node ("_class_name", [Parser.Tip tok])) =
wenzelm@42242:           let
wenzelm@42242:             val c = get_class (Lexicon.str_of_token tok);
wenzelm@42298:             val _ = report (Lexicon.pos_of_token tok) (markup_class ctxt) c;
wenzelm@42282:           in [Ast.Constant (Lexicon.mark_class c)] end
wenzelm@42282:       | asts_of (Parser.Node ("_type_name", [Parser.Tip tok])) =
wenzelm@42242:           let
wenzelm@42242:             val c = get_type (Lexicon.str_of_token tok);
wenzelm@42298:             val _ = report (Lexicon.pos_of_token tok) (markup_type ctxt) c;
wenzelm@42282:           in [Ast.Constant (Lexicon.mark_type c)] end
wenzelm@42282:       | asts_of (Parser.Node ("_constrain_position", [pt as Parser.Tip tok])) =
wenzelm@42242:           if constrain_pos then
wenzelm@42282:             [Ast.Appl [Ast.Constant "_constrain", ast_of pt,
wenzelm@42282:               Ast.Variable (Term_Position.encode (Lexicon.pos_of_token tok))]]
wenzelm@42282:           else [ast_of pt]
wenzelm@42282:       | asts_of (Parser.Node (a, pts)) =
wenzelm@42282:           let
wenzelm@42282:             val _ = pts |> List.app
wenzelm@42282:               (fn Parser.Node _ => () | Parser.Tip tok =>
wenzelm@42282:                 if Lexicon.valued_token tok then ()
wenzelm@42298:                 else report (Lexicon.pos_of_token tok) (markup_entity ctxt) a);
wenzelm@42282:           in [trans a (maps asts_of pts)] end
wenzelm@42282:       | asts_of (Parser.Tip tok) =
wenzelm@42282:           if Lexicon.valued_token tok
wenzelm@42282:           then [Ast.Variable (Lexicon.str_of_token tok)]
wenzelm@42282:           else []
wenzelm@42282: 
wenzelm@42282:     and ast_of pt =
wenzelm@42282:       (case asts_of pt of
wenzelm@42282:         [ast] => ast
wenzelm@42282:       | asts => raise Ast.AST ("parsetree_to_ast: malformed parsetree", asts));
wenzelm@42242: 
wenzelm@42242:     val ast = Exn.interruptible_capture ast_of parsetree;
wenzelm@42242:   in (! reports, ast) end;
wenzelm@42242: 
wenzelm@42242: 
wenzelm@42242: (* ast_to_term *)
wenzelm@42242: 
wenzelm@42242: fun ast_to_term ctxt trf =
wenzelm@42242:   let
wenzelm@42242:     fun trans a args =
wenzelm@42242:       (case trf a of
wenzelm@42242:         NONE => Term.list_comb (Lexicon.const a, args)
wenzelm@42242:       | SOME f => f ctxt args);
wenzelm@42242: 
wenzelm@42242:     fun term_of (Ast.Constant a) = trans a []
wenzelm@42242:       | term_of (Ast.Variable x) = Lexicon.read_var x
wenzelm@42242:       | term_of (Ast.Appl (Ast.Constant a :: (asts as _ :: _))) =
wenzelm@42242:           trans a (map term_of asts)
wenzelm@42242:       | term_of (Ast.Appl (ast :: (asts as _ :: _))) =
wenzelm@42242:           Term.list_comb (term_of ast, map term_of asts)
wenzelm@42242:       | term_of (ast as Ast.Appl _) = raise Ast.AST ("ast_to_term: malformed ast", [ast]);
wenzelm@42242:   in term_of end;
wenzelm@42242: 
wenzelm@42242: 
wenzelm@42242: (* decode_term -- transform parse tree into raw term *)
wenzelm@42242: 
wenzelm@42242: fun decode_term _ (result as (_: Position.reports, Exn.Exn _)) = result
wenzelm@42242:   | decode_term ctxt (reports0, Exn.Result tm) =
wenzelm@42242:       let
wenzelm@42250:         fun get_const a =
wenzelm@42250:           ((true, #1 (Term.dest_Const (ProofContext.read_const_proper ctxt false a)))
wenzelm@42282:             handle ERROR _ => (false, Consts.intern (ProofContext.consts_of ctxt) a));
wenzelm@42250:         val get_free = ProofContext.intern_skolem ctxt;
wenzelm@42250: 
wenzelm@42242:         val decodeT = typ_of_term (ProofContext.get_sort ctxt (term_sorts tm));
wenzelm@42242: 
wenzelm@42242:         val reports = Unsynchronized.ref reports0;
wenzelm@42242:         fun report ps = Position.reports reports ps;
wenzelm@42242: 
wenzelm@42242:         fun decode ps qs bs (Const ("_constrain", _) $ t $ typ) =
wenzelm@42264:               (case Term_Position.decode_position typ of
wenzelm@42242:                 SOME p => decode (p :: ps) qs bs t
wenzelm@42242:               | NONE => Type.constraint (decodeT typ) (decode ps qs bs t))
wenzelm@42242:           | decode ps qs bs (Const ("_constrainAbs", _) $ t $ typ) =
wenzelm@42264:               (case Term_Position.decode_position typ of
wenzelm@42242:                 SOME q => decode ps (q :: qs) bs t
wenzelm@42242:               | NONE => Type.constraint (decodeT typ --> dummyT) (decode ps qs bs t))
wenzelm@42242:           | decode _ qs bs (Abs (x, T, t)) =
wenzelm@42242:               let
wenzelm@42242:                 val id = serial_string ();
wenzelm@42242:                 val _ = report qs (markup_bound true) id;
wenzelm@42242:               in Abs (x, T, decode [] [] (id :: bs) t) end
wenzelm@42242:           | decode _ _ bs (t $ u) = decode [] [] bs t $ decode [] [] bs u
wenzelm@42242:           | decode ps _ _ (Const (a, T)) =
wenzelm@42242:               (case try Lexicon.unmark_fixed a of
wenzelm@42282:                 SOME x => (report ps (markup_free ctxt) x; Free (x, T))
wenzelm@42242:               | NONE =>
wenzelm@42242:                   let
wenzelm@42242:                     val c =
wenzelm@42242:                       (case try Lexicon.unmark_const a of
wenzelm@42242:                         SOME c => c
wenzelm@42242:                       | NONE => snd (get_const a));
wenzelm@42282:                     val _ = report ps (markup_const ctxt) c;
wenzelm@42242:                   in Const (c, T) end)
wenzelm@42242:           | decode ps _ _ (Free (a, T)) =
wenzelm@42242:               (case (get_free a, get_const a) of
wenzelm@42282:                 (SOME x, _) => (report ps (markup_free ctxt) x; Free (x, T))
wenzelm@42282:               | (_, (true, c)) => (report ps (markup_const ctxt) c; Const (c, T))
wenzelm@42242:               | (_, (false, c)) =>
wenzelm@42242:                   if Long_Name.is_qualified c
wenzelm@42282:                   then (report ps (markup_const ctxt) c; Const (c, T))
wenzelm@42282:                   else (report ps (markup_free ctxt) c; Free (c, T)))
wenzelm@42242:           | decode ps _ _ (Var (xi, T)) = (report ps markup_var xi; Var (xi, T))
wenzelm@42242:           | decode ps _ bs (t as Bound i) =
wenzelm@42242:               (case try (nth bs) i of
wenzelm@42242:                 SOME id => (report ps (markup_bound false) id; t)
wenzelm@42242:               | NONE => t);
wenzelm@42242: 
wenzelm@42242:         val tm' = Exn.interruptible_capture (fn () => decode [] [] [] tm) ();
wenzelm@42242:       in (! reports, tm') end;
wenzelm@42242: 
wenzelm@42242: 
wenzelm@42242: 
wenzelm@42242: (** parse **)
wenzelm@42242: 
wenzelm@42242: (* results *)
wenzelm@42242: 
wenzelm@42242: fun ambiguity_msg pos = "Parse error: ambiguous syntax" ^ Position.str_of pos;
wenzelm@42242: 
wenzelm@42242: fun proper_results results = map_filter (fn (y, Exn.Result x) => SOME (y, x) | _ => NONE) results;
wenzelm@42242: fun failed_results results = map_filter (fn (y, Exn.Exn e) => SOME (y, e) | _ => NONE) results;
wenzelm@42242: 
wenzelm@42242: fun report ctxt = List.app (fn (pos, m) => Context_Position.report ctxt pos m);
wenzelm@42242: 
wenzelm@42242: fun report_result ctxt pos results =
wenzelm@42242:   (case (proper_results results, failed_results results) of
wenzelm@42242:     ([], (reports, exn) :: _) => (report ctxt reports; reraise exn)
wenzelm@42242:   | ([(reports, x)], _) => (report ctxt reports; x)
wenzelm@42242:   | _ => error (ambiguity_msg pos));
wenzelm@42242: 
wenzelm@42242: 
wenzelm@42249: (* parse raw asts *)
wenzelm@42242: 
wenzelm@42242: fun parse_asts ctxt raw root (syms, pos) =
wenzelm@42242:   let
wenzelm@42251:     val syn = ProofContext.syn_of ctxt;
wenzelm@42253:     val ast_tr = Syntax.parse_ast_translation syn;
wenzelm@42242: 
wenzelm@42251:     val toks = Syntax.tokenize syn raw syms;
wenzelm@42242:     val _ = List.app (Lexicon.report_token ctxt) toks;
wenzelm@42242: 
wenzelm@42251:     val pts = Syntax.parse ctxt syn root (filter Lexicon.is_proper toks)
wenzelm@42242:       handle ERROR msg =>
wenzelm@42242:         error (msg ^
wenzelm@42242:           implode (map (Markup.markup Markup.report o Lexicon.reported_token_range ctxt) toks));
wenzelm@42242:     val len = length pts;
wenzelm@42242: 
wenzelm@42242:     val limit = Config.get ctxt Syntax.ambiguity_limit;
wenzelm@42242:     val _ =
wenzelm@42242:       if len <= Config.get ctxt Syntax.ambiguity_level then ()
wenzelm@42242:       else if not (Config.get ctxt Syntax.ambiguity_enabled) then error (ambiguity_msg pos)
wenzelm@42242:       else
wenzelm@42242:         (Context_Position.if_visible ctxt warning (cat_lines
wenzelm@42242:           (("Ambiguous input" ^ Position.str_of pos ^
wenzelm@42242:             "\nproduces " ^ string_of_int len ^ " parse trees" ^
wenzelm@42242:             (if len <= limit then "" else " (" ^ string_of_int limit ^ " displayed)") ^ ":") ::
wenzelm@42242:             map (Pretty.string_of o Parser.pretty_parsetree) (take limit pts))));
wenzelm@42242: 
wenzelm@42242:     val constrain_pos = not raw andalso Config.get ctxt Syntax.positions;
wenzelm@42253:     val parsetree_to_ast = parsetree_to_ast ctxt constrain_pos ast_tr;
wenzelm@42242:   in map parsetree_to_ast pts end;
wenzelm@42242: 
wenzelm@42249: fun parse_raw ctxt root input =
wenzelm@42242:   let
wenzelm@42253:     val syn = ProofContext.syn_of ctxt;
wenzelm@42253:     val tr = Syntax.parse_translation syn;
wenzelm@42255:     val parse_rules = Syntax.parse_rules syn;
wenzelm@42242:   in
wenzelm@42242:     parse_asts ctxt false root input
wenzelm@42255:     |> (map o apsnd o Exn.maps_result)
wenzelm@42255:         (Ast.normalize ctxt parse_rules #> Exn.interruptible_capture (ast_to_term ctxt tr))
wenzelm@42242:   end;
wenzelm@42242: 
wenzelm@42242: 
wenzelm@42249: (* parse logical entities *)
wenzelm@42242: 
wenzelm@42241: fun parse_failed ctxt pos msg kind =
wenzelm@42241:   cat_error msg ("Failed to parse " ^ kind ^
wenzelm@42241:     Markup.markup Markup.report (Context_Position.reported_text ctxt pos Markup.bad ""));
wenzelm@42241: 
wenzelm@42241: fun parse_sort ctxt text =
wenzelm@42241:   let
wenzelm@42241:     val (syms, pos) = Syntax.parse_token ctxt Markup.sort text;
wenzelm@42249:     val S =
wenzelm@42249:       parse_raw ctxt "sort" (syms, pos)
wenzelm@42249:       |> report_result ctxt pos
wenzelm@42249:       |> sort_of_term
wenzelm@42242:       handle ERROR msg => parse_failed ctxt pos msg "sort";
wenzelm@42241:   in Type.minimize_sort (ProofContext.tsig_of ctxt) S end;
wenzelm@42241: 
wenzelm@42241: fun parse_typ ctxt text =
wenzelm@42241:   let
wenzelm@42241:     val (syms, pos) = Syntax.parse_token ctxt Markup.typ text;
wenzelm@42249:     val T =
wenzelm@42249:       parse_raw ctxt "type" (syms, pos)
wenzelm@42249:       |> report_result ctxt pos
wenzelm@42249:       |> (fn t => typ_of_term (ProofContext.get_sort ctxt (term_sorts t)) t)
wenzelm@42242:       handle ERROR msg => parse_failed ctxt pos msg "type";
wenzelm@42241:   in T end;
wenzelm@42241: 
wenzelm@42281: fun parse_term is_prop ctxt text =
wenzelm@42241:   let
wenzelm@42281:     val (markup, kind, root, constrain) =
wenzelm@42281:       if is_prop
wenzelm@42281:       then (Markup.prop, "proposition", "prop", Type.constraint propT)
wenzelm@42288:       else (Markup.term, "term", Config.get ctxt Syntax.root, I);
wenzelm@42241:     val (syms, pos) = Syntax.parse_token ctxt markup text;
wenzelm@42249:   in
wenzelm@42249:     let
wenzelm@42249:       val results = parse_raw ctxt root (syms, pos) |> map (decode_term ctxt);
wenzelm@42249:       val ambiguity = length (proper_results results);
wenzelm@42241: 
wenzelm@42249:       val level = Config.get ctxt Syntax.ambiguity_level;
wenzelm@42249:       val limit = Config.get ctxt Syntax.ambiguity_limit;
wenzelm@42249: 
wenzelm@42249:       fun ambig_msg () =
wenzelm@42249:         if ambiguity > 1 andalso ambiguity <= level then
wenzelm@42249:           "Got more than one parse tree.\n\
wenzelm@42249:           \Retry with smaller syntax_ambiguity_level for more information."
wenzelm@42249:         else "";
wenzelm@42249: 
wenzelm@42249:       (*brute-force disambiguation via type-inference*)
wenzelm@42281:       fun check t = (Syntax.check_term ctxt (constrain t); Exn.Result t)
wenzelm@42249:         handle exn as ERROR _ => Exn.Exn exn;
wenzelm@42249: 
wenzelm@42249:       val results' =
wenzelm@42249:         if ambiguity > 1 then
wenzelm@42249:           (Par_List.map_name "Syntax_Phases.parse_term" o apsnd o Exn.maps_result)
wenzelm@42249:             check results
wenzelm@42249:         else results;
wenzelm@42249:       val reports' = fst (hd results');
wenzelm@42249: 
wenzelm@42249:       val errs = map snd (failed_results results');
wenzelm@42249:       val checked = map snd (proper_results results');
wenzelm@42249:       val len = length checked;
wenzelm@42249: 
wenzelm@42289:       val show_term = Syntax.string_of_term (Config.put Printer.show_brackets true ctxt);
wenzelm@42249:     in
wenzelm@42249:       if len = 0 then
wenzelm@42249:         report_result ctxt pos
wenzelm@42249:           [(reports', Exn.Exn (Exn.EXCEPTIONS (ERROR (ambig_msg ()) :: errs)))]
wenzelm@42249:       else if len = 1 then
wenzelm@42249:         (if ambiguity > level then
wenzelm@42249:           Context_Position.if_visible ctxt warning
wenzelm@42249:             "Fortunately, only one parse tree is type correct.\n\
wenzelm@42249:             \You may still want to disambiguate your grammar or your input."
wenzelm@42249:         else (); report_result ctxt pos results')
wenzelm@42249:       else
wenzelm@42249:         report_result ctxt pos
wenzelm@42249:           [(reports', Exn.Exn (ERROR (cat_lines (ambig_msg () ::
wenzelm@42249:             (("Ambiguous input, " ^ string_of_int len ^ " terms are type correct" ^
wenzelm@42249:               (if len <= limit then "" else " (" ^ string_of_int limit ^ " displayed)") ^ ":") ::
wenzelm@42249:               map show_term (take limit checked))))))]
wenzelm@42249:     end handle ERROR msg => parse_failed ctxt pos msg kind
wenzelm@42249:   end;
wenzelm@42241: 
wenzelm@42241: 
wenzelm@42242: (* parse_ast_pattern *)
wenzelm@42242: 
wenzelm@42242: fun parse_ast_pattern ctxt (root, str) =
wenzelm@42242:   let
wenzelm@42242:     val syn = ProofContext.syn_of ctxt;
wenzelm@42242: 
wenzelm@42242:     fun constify (ast as Ast.Constant _) = ast
wenzelm@42242:       | constify (ast as Ast.Variable x) =
wenzelm@42298:           if is_some (Syntax.lookup_const syn x) orelse Long_Name.is_qualified x
wenzelm@42298:           then Ast.Constant x
wenzelm@42242:           else ast
wenzelm@42242:       | constify (Ast.Appl asts) = Ast.Appl (map constify asts);
wenzelm@42242: 
wenzelm@42242:     val (syms, pos) = Syntax.read_token str;
wenzelm@42242:   in
wenzelm@42242:     parse_asts ctxt true root (syms, pos)
wenzelm@42242:     |> report_result ctxt pos
wenzelm@42242:     |> constify
wenzelm@42242:   end;
wenzelm@42242: 
wenzelm@42242: 
wenzelm@42242: 
wenzelm@42245: (** encode parse trees **)
wenzelm@42245: 
wenzelm@42245: (* term_of_sort *)
wenzelm@42245: 
wenzelm@42245: fun term_of_sort S =
wenzelm@42245:   let
wenzelm@42245:     val class = Lexicon.const o Lexicon.mark_class;
wenzelm@42245: 
wenzelm@42245:     fun classes [c] = class c
wenzelm@42245:       | classes (c :: cs) = Lexicon.const "_classes" $ class c $ classes cs;
wenzelm@42245:   in
wenzelm@42245:     (case S of
wenzelm@42245:       [] => Lexicon.const "_topsort"
wenzelm@42245:     | [c] => class c
wenzelm@42245:     | cs => Lexicon.const "_sort" $ classes cs)
wenzelm@42245:   end;
wenzelm@42245: 
wenzelm@42245: 
wenzelm@42245: (* term_of_typ *)
wenzelm@42245: 
wenzelm@42247: fun term_of_typ ctxt ty =
wenzelm@42245:   let
wenzelm@42247:     val show_sorts = Config.get ctxt show_sorts;
wenzelm@42247: 
wenzelm@42245:     fun of_sort t S =
wenzelm@42245:       if show_sorts then Lexicon.const "_ofsort" $ t $ term_of_sort S
wenzelm@42245:       else t;
wenzelm@42245: 
wenzelm@42245:     fun term_of (Type (a, Ts)) =
wenzelm@42245:           Term.list_comb (Lexicon.const (Lexicon.mark_type a), map term_of Ts)
wenzelm@42245:       | term_of (TFree (x, S)) =
wenzelm@42290:           if is_some (Term_Position.decode x) then Syntax.free x
wenzelm@42290:           else of_sort (Lexicon.const "_tfree" $ Syntax.free x) S
wenzelm@42290:       | term_of (TVar (xi, S)) = of_sort (Lexicon.const "_tvar" $ Syntax.var xi) S;
wenzelm@42245:   in term_of ty end;
wenzelm@42245: 
wenzelm@42245: 
wenzelm@42245: (* simple_ast_of *)
wenzelm@42245: 
wenzelm@42245: fun simple_ast_of ctxt =
wenzelm@42245:   let
wenzelm@42245:     val tune_var = if Config.get ctxt show_question_marks then I else unprefix "?";
wenzelm@42245:     fun ast_of (Const (c, _)) = Ast.Constant c
wenzelm@42245:       | ast_of (Free (x, _)) = Ast.Variable x
wenzelm@42245:       | ast_of (Var (xi, _)) = Ast.Variable (tune_var (Term.string_of_vname xi))
wenzelm@42245:       | ast_of (t as _ $ _) =
wenzelm@42245:           let val (f, args) = strip_comb t
wenzelm@42245:           in Ast.mk_appl (ast_of f) (map ast_of args) end
wenzelm@42245:       | ast_of (Bound i) = Ast.Variable ("B." ^ string_of_int i)
wenzelm@42245:       | ast_of (Abs _) = raise Fail "simple_ast_of: Abs";
wenzelm@42245:   in ast_of end;
wenzelm@42245: 
wenzelm@42245: 
wenzelm@42245: (* sort_to_ast and typ_to_ast *)
wenzelm@42245: 
wenzelm@42245: fun ast_of_termT ctxt trf tm =
wenzelm@42245:   let
wenzelm@42245:     val ctxt' = Config.put show_sorts false ctxt;
wenzelm@42245:     fun ast_of (t as Const ("_tfree", _) $ Free _) = simple_ast_of ctxt t
wenzelm@42245:       | ast_of (t as Const ("_tvar", _) $ Var _) = simple_ast_of ctxt t
wenzelm@42245:       | ast_of (Const (a, _)) = trans a []
wenzelm@42245:       | ast_of (t as _ $ _) =
wenzelm@42245:           (case strip_comb t of
wenzelm@42245:             (Const (a, _), args) => trans a args
wenzelm@42245:           | (f, args) => Ast.Appl (map ast_of (f :: args)))
wenzelm@42245:       | ast_of t = simple_ast_of ctxt t
wenzelm@42254:     and trans a args = ast_of (trf a ctxt' dummyT args)
wenzelm@42254:       handle Match => Ast.mk_appl (Ast.Constant a) (map ast_of args);
wenzelm@42245:   in ast_of tm end;
wenzelm@42245: 
wenzelm@42245: fun sort_to_ast ctxt trf S = ast_of_termT ctxt trf (term_of_sort S);
wenzelm@42247: fun typ_to_ast ctxt trf T = ast_of_termT ctxt trf (term_of_typ ctxt T);
wenzelm@42245: 
wenzelm@42245: 
wenzelm@42245: (* term_to_ast *)
wenzelm@42245: 
wenzelm@42252: fun term_to_ast idents is_syntax_const ctxt trf tm =
wenzelm@42245:   let
wenzelm@42245:     val show_types =
wenzelm@42245:       Config.get ctxt show_types orelse Config.get ctxt show_sorts orelse
wenzelm@42245:       Config.get ctxt show_all_types;
wenzelm@42245:     val show_structs = Config.get ctxt show_structs;
wenzelm@42245:     val show_free_types = Config.get ctxt show_free_types;
wenzelm@42245:     val show_all_types = Config.get ctxt show_all_types;
wenzelm@42245: 
wenzelm@42245:     val {structs, fixes} = idents;
wenzelm@42245: 
wenzelm@42249:     fun mark_atoms ((t as Const (c, _)) $ u) =
wenzelm@42294:           if member (op =) Syntax.token_markers c
wenzelm@42245:           then t $ u else mark_atoms t $ mark_atoms u
wenzelm@42245:       | mark_atoms (t $ u) = mark_atoms t $ mark_atoms u
wenzelm@42245:       | mark_atoms (Abs (x, T, t)) = Abs (x, T, mark_atoms t)
wenzelm@42245:       | mark_atoms (t as Const (c, T)) =
wenzelm@42252:           if is_syntax_const c then t
wenzelm@42245:           else Const (Lexicon.mark_const c, T)
wenzelm@42245:       | mark_atoms (t as Free (x, T)) =
wenzelm@42245:           let val i = find_index (fn s => s = x) structs + 1 in
wenzelm@42245:             if i = 0 andalso member (op =) fixes x then
wenzelm@42245:               Const (Lexicon.mark_fixed x, T)
wenzelm@42245:             else if i = 1 andalso not show_structs then
wenzelm@42245:               Lexicon.const "_struct" $ Lexicon.const "_indexdefault"
wenzelm@42245:             else Lexicon.const "_free" $ t
wenzelm@42245:           end
wenzelm@42245:       | mark_atoms (t as Var (xi, T)) =
wenzelm@42288:           if xi = Syntax_Ext.dddot_indexname then Const ("_DDDOT", T)
wenzelm@42245:           else Lexicon.const "_var" $ t
wenzelm@42245:       | mark_atoms a = a;
wenzelm@42245: 
wenzelm@42245:     fun prune_typs (t_seen as (Const _, _)) = t_seen
wenzelm@42245:       | prune_typs (t as Free (x, ty), seen) =
wenzelm@42245:           if ty = dummyT then (t, seen)
wenzelm@42290:           else if not show_free_types orelse member (op aconv) seen t then (Syntax.free x, seen)
wenzelm@42245:           else (t, t :: seen)
wenzelm@42245:       | prune_typs (t as Var (xi, ty), seen) =
wenzelm@42245:           if ty = dummyT then (t, seen)
wenzelm@42290:           else if not show_free_types orelse member (op aconv) seen t then (Syntax.var xi, seen)
wenzelm@42245:           else (t, t :: seen)
wenzelm@42245:       | prune_typs (t_seen as (Bound _, _)) = t_seen
wenzelm@42245:       | prune_typs (Abs (x, ty, t), seen) =
wenzelm@42245:           let val (t', seen') = prune_typs (t, seen);
wenzelm@42245:           in (Abs (x, ty, t'), seen') end
wenzelm@42245:       | prune_typs (t1 $ t2, seen) =
wenzelm@42245:           let
wenzelm@42245:             val (t1', seen') = prune_typs (t1, seen);
wenzelm@42245:             val (t2', seen'') = prune_typs (t2, seen');
wenzelm@42245:           in (t1' $ t2', seen'') end;
wenzelm@42245: 
wenzelm@42245:     fun ast_of tm =
wenzelm@42245:       (case strip_comb tm of
wenzelm@42284:         (t as Abs _, ts) => Ast.mk_appl (ast_of (Syntax_Trans.abs_tr' ctxt t)) (map ast_of ts)
wenzelm@42245:       | ((c as Const ("_free", _)), Free (x, T) :: ts) =>
wenzelm@42290:           Ast.mk_appl (constrain (c $ Syntax.free x) T) (map ast_of ts)
wenzelm@42245:       | ((c as Const ("_var", _)), Var (xi, T) :: ts) =>
wenzelm@42290:           Ast.mk_appl (constrain (c $ Syntax.var xi) T) (map ast_of ts)
wenzelm@42245:       | ((c as Const ("_bound", _)), Free (x, T) :: ts) =>
wenzelm@42290:           Ast.mk_appl (constrain (c $ Syntax.free x) T) (map ast_of ts)
wenzelm@42245:       | (Const ("_idtdummy", T), ts) =>
wenzelm@42245:           Ast.mk_appl (constrain (Lexicon.const "_idtdummy") T) (map ast_of ts)
wenzelm@42245:       | (const as Const (c, T), ts) =>
wenzelm@42245:           if show_all_types
wenzelm@42245:           then Ast.mk_appl (constrain const T) (map ast_of ts)
wenzelm@42245:           else trans c T ts
wenzelm@42245:       | (t, ts) => Ast.mk_appl (simple_ast_of ctxt t) (map ast_of ts))
wenzelm@42245: 
wenzelm@42254:     and trans a T args = ast_of (trf a ctxt T args)
wenzelm@42254:       handle Match => Ast.mk_appl (Ast.Constant a) (map ast_of args)
wenzelm@42245: 
wenzelm@42245:     and constrain t T =
wenzelm@42245:       if show_types andalso T <> dummyT then
wenzelm@42248:         Ast.Appl [Ast.Constant "_constrain", simple_ast_of ctxt t,
wenzelm@42247:           ast_of_termT ctxt trf (term_of_typ ctxt T)]
wenzelm@42245:       else simple_ast_of ctxt t;
wenzelm@42245:   in
wenzelm@42245:     tm
wenzelm@42284:     |> Syntax_Trans.prop_tr'
wenzelm@42245:     |> show_types ? (#1 o prune_typs o rpair [])
wenzelm@42245:     |> mark_atoms
wenzelm@42245:     |> ast_of
wenzelm@42245:   end;
wenzelm@42245: 
wenzelm@42245: 
wenzelm@42245: 
wenzelm@42242: (** unparse **)
wenzelm@42242: 
wenzelm@42245: local
wenzelm@42245: 
wenzelm@42267: fun free_or_skolem ctxt x =
wenzelm@42267:   let
wenzelm@42267:     val m =
wenzelm@42267:       if Variable.is_fixed ctxt x orelse Syntax.is_pretty_global ctxt
wenzelm@42267:       then Markup.fixed x
wenzelm@42267:       else Markup.hilite;
wenzelm@42267:   in
wenzelm@42267:     if can Name.dest_skolem x
wenzelm@42267:     then ([m, Markup.skolem], ProofContext.revert_skolem ctxt x)
wenzelm@42267:     else ([m, Markup.free], x)
wenzelm@42267:   end;
wenzelm@42267: 
wenzelm@42267: fun var_or_skolem s =
wenzelm@42267:   (case Lexicon.read_variable s of
wenzelm@42267:     SOME (x, i) =>
wenzelm@42267:       (case try Name.dest_skolem x of
wenzelm@42267:         NONE => (Markup.var, s)
wenzelm@42267:       | SOME x' => (Markup.skolem, Term.string_of_vname (x', i)))
wenzelm@42267:   | NONE => (Markup.var, s));
wenzelm@42267: 
wenzelm@42267: fun unparse_t t_to_ast prt_t markup ctxt t =
wenzelm@42245:   let
wenzelm@42253:     val syn = ProofContext.syn_of ctxt;
wenzelm@42267: 
wenzelm@42267:     fun token_trans "_tfree" x = SOME (Pretty.mark_str (Markup.tfree, x))
wenzelm@42267:       | token_trans "_tvar" x = SOME (Pretty.mark_str (Markup.tvar, x))
wenzelm@42267:       | token_trans "_free" x = SOME (Pretty.marks_str (free_or_skolem ctxt x))
wenzelm@42267:       | token_trans "_bound" x = SOME (Pretty.mark_str (Markup.bound, x))
wenzelm@42267:       | token_trans "_var" x = SOME (Pretty.mark_str (var_or_skolem x))
wenzelm@42267:       | token_trans "_numeral" x = SOME (Pretty.mark_str (Markup.numeral, x))
wenzelm@42267:       | token_trans "_inner_string" x = SOME (Pretty.mark_str (Markup.inner_string, x))
wenzelm@42267:       | token_trans _ _ = NONE;
wenzelm@42267: 
wenzelm@42301:     fun markup_extern c =
wenzelm@42301:       (case Syntax.lookup_const syn c of
wenzelm@42301:         SOME "" => ([], c)
wenzelm@42301:       | SOME b => markup_extern b
wenzelm@42301:       | NONE => c |> Lexicon.unmark
wenzelm@42359:          {case_class = fn x => ([Markup.tclass x], ProofContext.extern_class ctxt x),
wenzelm@42359:           case_type = fn x => ([Markup.tycon x], ProofContext.extern_type ctxt x),
wenzelm@42359:           case_const = fn x => ([Markup.const x], ProofContext.extern_const ctxt x),
wenzelm@42301:           case_fixed = fn x => free_or_skolem ctxt x,
wenzelm@42301:           case_default = fn x => ([], x)});
wenzelm@42245:   in
wenzelm@42255:     t_to_ast ctxt (Syntax.print_translation syn) t
wenzelm@42255:     |> Ast.normalize ctxt (Syntax.print_rules syn)
wenzelm@42267:     |> prt_t ctxt (Syntax.prtabs syn) (Syntax.print_ast_translation syn) token_trans markup_extern
wenzelm@42253:     |> Pretty.markup markup
wenzelm@42245:   end;
wenzelm@42245: 
wenzelm@42245: in
wenzelm@42245: 
wenzelm@42267: val unparse_sort = unparse_t sort_to_ast Printer.pretty_typ_ast Markup.sort;
wenzelm@42267: val unparse_typ = unparse_t typ_to_ast Printer.pretty_typ_ast Markup.typ;
wenzelm@42241: 
wenzelm@42241: fun unparse_term ctxt =
wenzelm@42241:   let
wenzelm@42252:     val thy = ProofContext.theory_of ctxt;
wenzelm@42252:     val syn = ProofContext.syn_of ctxt;
wenzelm@42252:     val idents = Local_Syntax.idents_of (ProofContext.syntax_of ctxt);
wenzelm@42241:   in
wenzelm@42298:     unparse_t (term_to_ast idents (is_some o Syntax.lookup_const syn))
wenzelm@42267:       (Printer.pretty_term_ast (not (Pure_Thy.old_appl_syntax thy)))
wenzelm@42267:       Markup.term ctxt
wenzelm@42241:   end;
wenzelm@42241: 
wenzelm@42249: end;
wenzelm@42249: 
wenzelm@42241: 
wenzelm@42245: 
wenzelm@42245: (** translations **)
wenzelm@42245: 
wenzelm@42245: (* type propositions *)
wenzelm@42245: 
wenzelm@42247: fun type_prop_tr' ctxt T [Const ("\\<^const>Pure.sort_constraint", _)] =
wenzelm@42247:       Lexicon.const "_sort_constraint" $ term_of_typ (Config.put show_sorts true ctxt) T
wenzelm@42247:   | type_prop_tr' ctxt T [t] =
wenzelm@42247:       Lexicon.const "_ofclass" $ term_of_typ ctxt T $ t
wenzelm@42245:   | type_prop_tr' _ T ts = raise TYPE ("type_prop_tr'", [T], ts);
wenzelm@42245: 
wenzelm@42245: 
wenzelm@42245: (* type reflection *)
wenzelm@42245: 
wenzelm@42247: fun type_tr' ctxt (Type ("itself", [T])) ts =
wenzelm@42247:       Term.list_comb (Lexicon.const "_TYPE" $ term_of_typ ctxt T, ts)
wenzelm@42245:   | type_tr' _ _ _ = raise Match;
wenzelm@42245: 
wenzelm@42245: 
wenzelm@42245: (* type constraints *)
wenzelm@42245: 
wenzelm@42247: fun type_constraint_tr' ctxt (Type ("fun", [T, _])) (t :: ts) =
wenzelm@42248:       Term.list_comb (Lexicon.const "_constrain" $ t $ term_of_typ ctxt T, ts)
wenzelm@42245:   | type_constraint_tr' _ _ _ = raise Match;
wenzelm@42245: 
wenzelm@42245: 
wenzelm@42295: (* authentic syntax *)
wenzelm@42295: 
wenzelm@42295: fun const_ast_tr intern ctxt [Ast.Variable c] =
wenzelm@42295:       let
wenzelm@42295:         val Const (c', _) = ProofContext.read_const_proper ctxt false c;
wenzelm@42295:         val d = if intern then Lexicon.mark_const c' else c;
wenzelm@42295:       in Ast.Constant d end
wenzelm@42296:   | const_ast_tr intern ctxt [Ast.Appl [Ast.Constant "_constrain", x, T]] =
wenzelm@42296:       Ast.Appl [Ast.Constant "_constrain", const_ast_tr intern ctxt [x], T]
wenzelm@42295:   | const_ast_tr _ _ asts = raise Ast.AST ("const_ast_tr", asts);
wenzelm@42295: 
wenzelm@42295: 
wenzelm@42245: (* setup translations *)
wenzelm@42245: 
wenzelm@42245: val _ = Context.>> (Context.map_theory
wenzelm@42295:  (Sign.add_advanced_trfuns
wenzelm@42295:   ([("_context_const", const_ast_tr true),
wenzelm@42295:     ("_context_xconst", const_ast_tr false)], [], [], []) #>
wenzelm@42295:   Sign.add_advanced_trfunsT
wenzelm@42245:    [("_type_prop", type_prop_tr'),
wenzelm@42245:     ("\\<^const>TYPE", type_tr'),
wenzelm@42245:     ("_type_constraint_", type_constraint_tr')]));
wenzelm@42245: 
wenzelm@42245: 
wenzelm@42245: 
wenzelm@42242: (** install operations **)
wenzelm@42242: 
wenzelm@42241: val _ = Syntax.install_operations
wenzelm@42241:   {parse_sort = parse_sort,
wenzelm@42241:    parse_typ = parse_typ,
wenzelm@42281:    parse_term = parse_term false,
wenzelm@42281:    parse_prop = parse_term true,
wenzelm@42241:    unparse_sort = unparse_sort,
wenzelm@42241:    unparse_typ = unparse_typ,
wenzelm@42241:    unparse_term = unparse_term};
wenzelm@42241: 
wenzelm@42241: end;