src/Pure/Thy/thy_output.ML
author wenzelm
Fri Mar 06 21:49:58 2009 +0100 (2009-03-06)
changeset 30317 159bab53b40d
parent 30208 0abadde7b3fb
child 30367 ee8841b1b981
permissions -rw-r--r--
improved error handling for document antiquotations;
     1 (*  Title:      Pure/Thy/thy_output.ML
     2     Author:     Markus Wenzel, TU Muenchen
     3 
     4 Theory document output.
     5 *)
     6 
     7 signature THY_OUTPUT =
     8 sig
     9   val display: bool ref
    10   val quotes: bool ref
    11   val indent: int ref
    12   val source: bool ref
    13   val break: bool ref
    14   val add_commands: (string * (Args.src -> Toplevel.node option -> string)) list -> unit
    15   val add_options: (string * (string -> (unit -> string) -> unit -> string)) list -> unit
    16   val defined_command: string -> bool
    17   val defined_option: string -> bool
    18   val print_antiquotations: unit -> unit
    19   val boolean: string -> bool
    20   val integer: string -> int
    21   val args: (Context.generic * Args.T list -> 'a * (Context.generic * Args.T list)) ->
    22     (Args.src -> Proof.context -> 'a -> string) -> Args.src -> Toplevel.node option -> string
    23   datatype markup = Markup | MarkupEnv | Verbatim
    24   val modes: string list ref
    25   val eval_antiquote: Scan.lexicon -> Toplevel.node option -> SymbolPos.text * Position.T -> string
    26   val present_thy: Scan.lexicon -> (string -> string list) -> (markup -> string -> bool) ->
    27     (Toplevel.transition * Toplevel.state) list -> (OuterLex.token, 'a) Source.source -> Buffer.T
    28   val str_of_source: Args.src -> string
    29   val pretty_text: string -> Pretty.T
    30   val pretty_term: Proof.context -> term -> Pretty.T
    31   val pretty_thm: Proof.context -> thm -> Pretty.T
    32   val output_list: (Proof.context -> 'a -> Pretty.T) -> Args.src ->
    33     Proof.context -> 'a list -> string
    34   val output: (Proof.context -> 'a -> Pretty.T) -> Args.src -> Proof.context -> 'a -> string
    35 end;
    36 
    37 structure ThyOutput: THY_OUTPUT =
    38 struct
    39 
    40 structure T = OuterLex;
    41 structure P = OuterParse;
    42 
    43 
    44 (** global options **)
    45 
    46 val locale = ref "";
    47 val display = ref false;
    48 val quotes = ref false;
    49 val indent = ref 0;
    50 val source = ref false;
    51 val break = ref false;
    52 
    53 
    54 
    55 (** maintain global commands **)
    56 
    57 local
    58 
    59 val global_commands =
    60   ref (Symtab.empty: (Args.src -> Toplevel.node option -> string) Symtab.table);
    61 
    62 val global_options =
    63   ref (Symtab.empty: (string -> (unit -> string) -> unit -> string) Symtab.table);
    64 
    65 fun add_item kind (name, x) tab =
    66  (if not (Symtab.defined tab name) then ()
    67   else warning ("Redefined document antiquotation " ^ kind ^ ": " ^ quote name);
    68   Symtab.update (name, x) tab);
    69 
    70 in
    71 
    72 fun add_commands xs = CRITICAL (fn () => change global_commands (fold (add_item "command") xs));
    73 fun add_options xs = CRITICAL (fn () => change global_options (fold (add_item "option") xs));
    74 
    75 fun defined_command name = Symtab.defined (! global_commands) name;
    76 fun defined_option name = Symtab.defined (! global_options) name;
    77 
    78 fun command src =
    79   let val ((name, _), pos) = Args.dest_src src in
    80     (case Symtab.lookup (! global_commands) name of
    81       NONE => error ("Unknown document antiquotation: " ^ quote name ^ Position.str_of pos)
    82     | SOME f =>
    83        (Position.report (Markup.doc_antiq name) pos;
    84         (fn node => f src node handle ERROR msg =>
    85           cat_error msg ("The error(s) above occurred in document antiquotation: " ^
    86             quote name ^ Position.str_of pos))))
    87   end;
    88 
    89 fun option (name, s) f () =
    90   (case Symtab.lookup (! global_options) name of
    91     NONE => error ("Unknown document antiquotation option: " ^ quote name)
    92   | SOME opt => opt s f ());
    93 
    94 fun options [] f = f
    95   | options (opt :: opts) f = option opt (options opts f);
    96 
    97 
    98 fun print_antiquotations () =
    99  [Pretty.big_list "document antiquotation commands:"
   100     (map Pretty.str (sort_strings (Symtab.keys (! global_commands)))),
   101   Pretty.big_list "document antiquotation options:"
   102     (map Pretty.str (sort_strings (Symtab.keys (! global_options))))]
   103  |> Pretty.chunks |> Pretty.writeln;
   104 
   105 end;
   106 
   107 
   108 
   109 (** syntax of antiquotations **)
   110 
   111 (* option values *)
   112 
   113 fun boolean "" = true
   114   | boolean "true" = true
   115   | boolean "false" = false
   116   | boolean s = error ("Bad boolean value: " ^ quote s);
   117 
   118 fun integer s =
   119   let
   120     fun int ss =
   121       (case Library.read_int ss of (i, []) => i
   122       | _ => error ("Bad integer value: " ^ quote s));
   123   in (case Symbol.explode s of "-" :: ss => ~ (int ss) | ss => int ss) end;
   124 
   125 
   126 (* args syntax *)
   127 
   128 fun syntax scan = Args.context_syntax "document antiquotation" scan;
   129 
   130 fun args scan f src node : string =
   131   let
   132     val loc = if ! locale = "" then NONE else SOME (! locale);
   133     val (x, ctxt) = syntax scan src (Toplevel.presentation_context node loc);
   134   in f src ctxt x end;
   135 
   136 
   137 (* outer syntax *)
   138 
   139 local
   140 
   141 val property = P.xname -- Scan.optional (P.$$$ "=" |-- P.!!! P.xname) "";
   142 val properties = Scan.optional (P.$$$ "[" |-- P.!!! (P.enum "," property --| P.$$$ "]")) [];
   143 
   144 in
   145 
   146 val antiq = P.!!! (P.position P.xname -- properties -- Args.parse --| Scan.ahead P.eof)
   147   >> (fn (((x, pos), y), z) => (y, Args.src ((x, z), pos)));
   148 
   149 end;
   150 
   151 
   152 (* eval_antiquote *)
   153 
   154 val modes = ref ([]: string list);
   155 
   156 fun eval_antiquote lex node (txt, pos) =
   157   let
   158     fun expand (Antiquote.Text s) = s
   159       | expand (Antiquote.Antiq x) =
   160           let val (opts, src) = Antiquote.read_antiq lex antiq x in
   161             options opts (fn () => command src node) ();  (*preview errors!*)
   162             PrintMode.with_modes (! modes @ Latex.modes)
   163               (Output.no_warnings (options opts (fn () => command src node))) ()
   164           end
   165       | expand (Antiquote.Open _) = ""
   166       | expand (Antiquote.Close _) = "";
   167     val ants = Antiquote.read (SymbolPos.explode (txt, pos), pos);
   168   in
   169     if is_none node andalso exists Antiquote.is_antiq ants then
   170       error ("Unknown context -- cannot expand document antiquotations" ^ Position.str_of pos)
   171     else implode (map expand ants)
   172   end;
   173 
   174 
   175 
   176 (** present theory source **)
   177 
   178 (*NB: arranging white space around command spans is a black art.*)
   179 
   180 (* presentation tokens *)
   181 
   182 datatype token =
   183     NoToken
   184   | BasicToken of T.token
   185   | MarkupToken of string * (string * Position.T)
   186   | MarkupEnvToken of string * (string * Position.T)
   187   | VerbatimToken of string * Position.T;
   188 
   189 fun output_token lex state =
   190   let
   191     val eval = eval_antiquote lex (try Toplevel.node_of state)
   192   in
   193     fn NoToken => ""
   194      | BasicToken tok => Latex.output_basic tok
   195      | MarkupToken (cmd, txt) => Latex.output_markup cmd (eval txt)
   196      | MarkupEnvToken (cmd, txt) => Latex.output_markup_env cmd (eval txt)
   197      | VerbatimToken txt => Latex.output_verbatim (eval txt)
   198   end;
   199 
   200 fun basic_token pred (BasicToken tok) = pred tok
   201   | basic_token _ _ = false;
   202 
   203 val improper_token = basic_token (not o T.is_proper);
   204 val comment_token = basic_token T.is_comment;
   205 val blank_token = basic_token T.is_blank;
   206 val newline_token = basic_token T.is_newline;
   207 
   208 
   209 (* command spans *)
   210 
   211 type command = string * Position.T * string list;   (*name, position, tags*)
   212 type source = (token * (string * int)) list;        (*token, markup flag, meta-comment depth*)
   213 
   214 datatype span = Span of command * (source * source * source * source) * bool;
   215 
   216 fun make_span cmd src =
   217   let
   218     fun take_newline (tok :: toks) =
   219           if newline_token (fst tok) then ([tok], toks, true)
   220           else ([], tok :: toks, false)
   221       | take_newline [] = ([], [], false);
   222     val (((src_prefix, src_main), src_suffix1), (src_suffix2, src_appendix, newline)) =
   223       src
   224       |> take_prefix (improper_token o fst)
   225       ||>> take_suffix (improper_token o fst)
   226       ||>> take_prefix (comment_token o fst)
   227       ||> take_newline;
   228   in Span (cmd, (src_prefix, src_main, src_suffix1 @ src_suffix2, src_appendix), newline) end;
   229 
   230 
   231 (* present spans *)
   232 
   233 local
   234 
   235 fun err_bad_nesting pos =
   236   error ("Bad nesting of commands in presentation" ^ pos);
   237 
   238 fun edge which f (x: string option, y) =
   239   if x = y then I
   240   else (case which (x, y) of NONE => I | SOME txt => Buffer.add (f txt));
   241 
   242 val begin_tag = edge #2 Latex.begin_tag;
   243 val end_tag = edge #1 Latex.end_tag;
   244 fun open_delim delim e = edge #2 Latex.begin_delim e #> delim #> edge #2 Latex.end_delim e;
   245 fun close_delim delim e = edge #1 Latex.begin_delim e #> delim #> edge #1 Latex.end_delim e;
   246 
   247 in
   248 
   249 fun present_span lex default_tags span state state'
   250     (tag_stack, active_tag, newline, buffer, present_cont) =
   251   let
   252     val present = fold (fn (tok, (flag, 0)) =>
   253         Buffer.add (output_token lex state' tok)
   254         #> Buffer.add flag
   255       | _ => I);
   256 
   257     val Span ((cmd_name, cmd_pos, cmd_tags), srcs, span_newline) = span;
   258 
   259     val (tag, tags) = tag_stack;
   260     val tag' = try hd (fold OuterKeyword.update_tags cmd_tags (the_list tag));
   261 
   262     val active_tag' =
   263       if is_some tag' then tag'
   264       else if cmd_name = "end" andalso not (Toplevel.is_toplevel state') then NONE
   265       else try hd (default_tags cmd_name);
   266     val edge = (active_tag, active_tag');
   267 
   268     val newline' =
   269       if is_none active_tag' then span_newline else newline;
   270 
   271     val nesting = Toplevel.level state' - Toplevel.level state;
   272     val tag_stack' =
   273       if nesting = 0 andalso not (Toplevel.is_proof state) then tag_stack
   274       else if nesting >= 0 then (tag', replicate nesting tag @ tags)
   275       else
   276         (case Library.drop (~ nesting - 1, tags) of
   277           tgs :: tgss => (tgs, tgss)
   278         | [] => err_bad_nesting (Position.str_of cmd_pos));
   279 
   280     val buffer' =
   281       buffer
   282       |> end_tag edge
   283       |> close_delim (fst present_cont) edge
   284       |> snd present_cont
   285       |> open_delim (present (#1 srcs)) edge
   286       |> begin_tag edge
   287       |> present (#2 srcs);
   288     val present_cont' =
   289       if newline then (present (#3 srcs), present (#4 srcs))
   290       else (I, present (#3 srcs) #> present (#4 srcs));
   291   in (tag_stack', active_tag', newline', buffer', present_cont') end;
   292 
   293 fun present_trailer ((_, tags), active_tag, _, buffer, present_cont) =
   294   if not (null tags) then err_bad_nesting " at end of theory"
   295   else
   296     buffer
   297     |> end_tag (active_tag, NONE)
   298     |> close_delim (fst present_cont) (active_tag, NONE)
   299     |> snd present_cont;
   300 
   301 end;
   302 
   303 
   304 (* present_thy *)
   305 
   306 datatype markup = Markup | MarkupEnv | Verbatim;
   307 
   308 local
   309 
   310 val space_proper =
   311   Scan.one T.is_blank -- Scan.many T.is_comment -- Scan.one T.is_proper;
   312 
   313 val is_improper = not o (T.is_proper orf T.is_begin_ignore orf T.is_end_ignore);
   314 val improper = Scan.many is_improper;
   315 val improper_end = Scan.repeat (Scan.unless space_proper (Scan.one is_improper));
   316 val blank_end = Scan.repeat (Scan.unless space_proper (Scan.one T.is_blank));
   317 
   318 val opt_newline = Scan.option (Scan.one T.is_newline);
   319 
   320 val ignore =
   321   Scan.depend (fn d => opt_newline |-- Scan.one T.is_begin_ignore
   322     >> pair (d + 1)) ||
   323   Scan.depend (fn d => Scan.one T.is_end_ignore --|
   324     (if d = 0 then Scan.fail_with (K "Bad nesting of meta-comments") else opt_newline)
   325     >> pair (d - 1));
   326 
   327 val tag = (improper -- P.$$$ "%" -- improper) |-- P.!!! (P.tag_name --| blank_end);
   328 
   329 val locale =
   330   Scan.option ((P.$$$ "(" -- improper -- P.$$$ "in") |--
   331     P.!!! (improper |-- P.xname --| (improper -- P.$$$ ")")));
   332 
   333 in
   334 
   335 fun present_thy lex default_tags is_markup command_results src =
   336   let
   337     (* tokens *)
   338 
   339     val ignored = Scan.state --| ignore
   340       >> (fn d => (NONE, (NoToken, ("", d))));
   341 
   342     fun markup mark mk flag = Scan.peek (fn d =>
   343       improper |-- P.position (Scan.one (T.is_kind T.Command andf is_markup mark o T.content_of)) --
   344       Scan.repeat tag --
   345       P.!!!! ((improper -- locale -- improper) |-- P.doc_source --| improper_end)
   346       >> (fn (((tok, pos), tags), txt) =>
   347         let val name = T.content_of tok
   348         in (SOME (name, pos, tags), (mk (name, txt), (flag, d))) end));
   349 
   350     val command = Scan.peek (fn d =>
   351       P.position (Scan.one (T.is_kind T.Command)) --
   352       Scan.repeat tag
   353       >> (fn ((tok, pos), tags) =>
   354         let val name = T.content_of tok
   355         in (SOME (name, pos, tags), (BasicToken tok, (Latex.markup_false, d))) end));
   356 
   357     val cmt = Scan.peek (fn d =>
   358       P.$$$ "--" |-- P.!!!! (improper |-- P.doc_source)
   359       >> (fn txt => (NONE, (MarkupToken ("cmt", txt), ("", d)))));
   360 
   361     val other = Scan.peek (fn d =>
   362        P.not_eof >> (fn tok => (NONE, (BasicToken tok, ("", d)))));
   363 
   364     val token =
   365       ignored ||
   366       markup Markup MarkupToken Latex.markup_true ||
   367       markup MarkupEnv MarkupEnvToken Latex.markup_true ||
   368       markup Verbatim (VerbatimToken o #2) "" ||
   369       command || cmt || other;
   370 
   371 
   372     (* spans *)
   373 
   374     val is_eof = fn (_, (BasicToken x, _)) => T.is_eof x | _ => false;
   375     val stopper = Scan.stopper (K (NONE, (BasicToken T.eof, ("", 0)))) is_eof;
   376 
   377     val cmd = Scan.one (is_some o fst);
   378     val non_cmd = Scan.one (is_none o fst andf not o is_eof) >> #2;
   379 
   380     val comments = Scan.many (comment_token o fst o snd);
   381     val blank = Scan.one (blank_token o fst o snd);
   382     val newline = Scan.one (newline_token o fst o snd);
   383     val before_cmd =
   384       Scan.option (newline -- comments) --
   385       Scan.option (newline -- comments) --
   386       Scan.option (blank -- comments) -- cmd;
   387 
   388     val span =
   389       Scan.repeat non_cmd -- cmd --
   390         Scan.repeat (Scan.unless before_cmd non_cmd) --
   391         Scan.option (newline >> (single o snd))
   392       >> (fn (((toks1, (cmd, tok2)), toks3), tok4) =>
   393           make_span (the cmd) (toks1 @ (tok2 :: (toks3 @ the_default [] tok4))));
   394 
   395     val spans =
   396       src
   397       |> Source.filter (not o T.is_semicolon)
   398       |> Source.source' 0 T.stopper (Scan.error (Scan.bulk token)) NONE
   399       |> Source.source stopper (Scan.error (Scan.bulk span)) NONE
   400       |> Source.exhaust;
   401 
   402 
   403     (* present commands *)
   404 
   405     fun present_command tr span st st' =
   406       Toplevel.setmp_thread_position tr (present_span lex default_tags span st st');
   407 
   408     fun present _ [] = I
   409       | present st (((tr, st'), span) :: rest) = present_command tr span st st' #> present st' rest;
   410   in
   411     if length command_results = length spans then
   412       ((NONE, []), NONE, true, Buffer.empty, (I, I))
   413       |> present Toplevel.toplevel (command_results ~~ spans)
   414       |> present_trailer
   415     else error "Messed-up outer syntax for presentation"
   416   end;
   417 
   418 end;
   419 
   420 
   421 
   422 (** setup default output **)
   423 
   424 (* options *)
   425 
   426 val _ = add_options
   427  [("show_types", Library.setmp Syntax.show_types o boolean),
   428   ("show_sorts", Library.setmp Syntax.show_sorts o boolean),
   429   ("show_structs", Library.setmp show_structs o boolean),
   430   ("show_question_marks", Library.setmp show_question_marks o boolean),
   431   ("long_names", Library.setmp NameSpace.long_names o boolean),
   432   ("short_names", Library.setmp NameSpace.short_names o boolean),
   433   ("unique_names", Library.setmp NameSpace.unique_names o boolean),
   434   ("eta_contract", Library.setmp Syntax.eta_contract o boolean),
   435   ("locale", Library.setmp locale),
   436   ("display", Library.setmp display o boolean),
   437   ("break", Library.setmp break o boolean),
   438   ("quotes", Library.setmp quotes o boolean),
   439   ("mode", fn s => fn f => PrintMode.with_modes [s] f),
   440   ("margin", Pretty.setmp_margin o integer),
   441   ("indent", Library.setmp indent o integer),
   442   ("source", Library.setmp source o boolean),
   443   ("goals_limit", Library.setmp goals_limit o integer)];
   444 
   445 
   446 (* basic pretty printing *)
   447 
   448 val str_of_source = space_implode " " o map T.unparse o #2 o #1 o Args.dest_src;
   449 
   450 fun tweak_line s =
   451   if ! display then s else Symbol.strip_blanks s;
   452 
   453 val pretty_text = Pretty.chunks o map Pretty.str o map tweak_line o Library.split_lines;
   454 
   455 fun pretty_term ctxt t = Syntax.pretty_term (Variable.auto_fixes t ctxt) t;
   456 
   457 fun pretty_term_abbrev ctxt t = ProofContext.pretty_term_abbrev (Variable.auto_fixes t ctxt) t;
   458 
   459 fun pretty_term_typ ctxt t =
   460   Syntax.pretty_term ctxt (TypeInfer.constrain (Term.fastype_of t) t);
   461 
   462 fun pretty_term_typeof ctxt = Syntax.pretty_typ ctxt o Term.fastype_of;
   463 
   464 fun pretty_const ctxt c =
   465   let
   466     val t = Const (c, Consts.type_scheme (ProofContext.consts_of ctxt) c)
   467       handle TYPE (msg, _, _) => error msg;
   468     val ([t'], _) = Variable.import_terms true [t] ctxt;
   469   in pretty_term ctxt t' end;
   470 
   471 fun pretty_abbrev ctxt s =
   472   let
   473     val t = Syntax.parse_term ctxt s |> singleton (ProofContext.standard_infer_types ctxt);
   474     fun err () = error ("Abbreviated constant expected: " ^ Syntax.string_of_term ctxt t);
   475     val (head, args) = Term.strip_comb t;
   476     val (c, T) = Term.dest_Const head handle TERM _ => err ();
   477     val (U, u) = Consts.the_abbreviation (ProofContext.consts_of ctxt) c
   478       handle TYPE _ => err ();
   479     val t' = Term.betapplys (Envir.expand_atom T (U, u), args);
   480   in pretty_term_abbrev ctxt (Logic.mk_equals (t, t')) end;
   481 
   482 fun pretty_thm ctxt = pretty_term ctxt o Thm.full_prop_of;
   483 
   484 fun pretty_term_style ctxt (name, t) =
   485   pretty_term ctxt (TermStyle.the_style (ProofContext.theory_of ctxt) name ctxt t);
   486 
   487 fun pretty_thm_style ctxt (name, th) =
   488   pretty_term_style ctxt (name, Thm.full_prop_of th);
   489 
   490 fun pretty_prf full ctxt thms =
   491   Pretty.chunks (map (ProofSyntax.pretty_proof_of ctxt full) thms);
   492 
   493 fun pretty_theory ctxt name =
   494   (Theory.requires (ProofContext.theory_of ctxt) name "presentation"; Pretty.str name);
   495 
   496 
   497 (* Isar output *)
   498 
   499 fun output_list pretty src ctxt xs =
   500   map (pretty ctxt) xs        (*always pretty in order to exhibit errors!*)
   501   |> (if ! source then K [pretty_text (str_of_source src)] else I)
   502   |> (if ! quotes then map Pretty.quote else I)
   503   |> (if ! display then
   504     map (Output.output o Pretty.string_of o Pretty.indent (! indent))
   505     #> space_implode "\\isasep\\isanewline%\n"
   506     #> enclose "\\begin{isabelle}%\n" "%\n\\end{isabelle}"
   507   else
   508     map (Output.output o (if ! break then Pretty.string_of else Pretty.str_of))
   509     #> space_implode "\\isasep\\isanewline%\n"
   510     #> enclose "\\isa{" "}");
   511 
   512 fun output pretty src ctxt = output_list pretty src ctxt o single;
   513 
   514 fun proof_state node =
   515   (case Option.map Toplevel.proof_node node of
   516     SOME (SOME prf) => ProofNode.current prf
   517   | _ => error "No proof state");
   518 
   519 fun output_goals main_goal src node = args (Scan.succeed ()) (output (fn _ => fn _ =>
   520   Pretty.chunks (Proof.pretty_goals main_goal (proof_state node)))) src node;
   521 
   522 fun ml_val txt = "fn _ => (" ^ txt ^ ");";
   523 fun ml_type txt = "val _ = NONE : (" ^ txt ^ ") option;";
   524 fun ml_struct txt = "functor DUMMY_FUNCTOR() = struct structure DUMMY = " ^ txt ^ " end;"
   525 
   526 fun output_ml ml _ ctxt (txt, pos) =
   527  (ML_Context.eval_in (SOME ctxt) false pos (ml txt);
   528   SymbolPos.content (SymbolPos.explode (txt, pos))
   529   |> (if ! quotes then quote else I)
   530   |> (if ! display then enclose "\\begin{verbatim}\n" "\n\\end{verbatim}"
   531   else
   532     split_lines
   533     #> map (space_implode "\\verb,|," o map (enclose "\\verb|" "|") o space_explode "|")
   534     #> space_implode "\\isasep\\isanewline%\n"));
   535 
   536 
   537 (* embedded lemmas *)
   538 
   539 fun pretty_lemma ctxt (prop, methods) =
   540   let
   541     val _ = ctxt
   542       |> Proof.theorem_i NONE (K I) [[(prop, [])]]
   543       |> Proof.global_terminal_proof methods;
   544   in pretty_term ctxt prop end;
   545 
   546 val embedded_lemma =
   547   args (Args.prop -- Scan.lift (Args.$$$ "by" |-- Method.parse -- Scan.option Method.parse))
   548     (output pretty_lemma o (fn ((a, arg :: _), p) => (Args.src ((a, [arg]), p))) o Args.dest_src);
   549 
   550 
   551 (* commands *)
   552 
   553 val _ = OuterKeyword.keyword "by";
   554 
   555 val _ = add_commands
   556  [("thm", args Attrib.thms (output_list pretty_thm)),
   557   ("thm_style", args (Scan.lift Args.liberal_name -- Attrib.thm) (output pretty_thm_style)),
   558   ("prop", args Args.prop (output pretty_term)),
   559   ("lemma", embedded_lemma),
   560   ("term", args Args.term (output pretty_term)),
   561   ("term_style", args (Scan.lift Args.liberal_name -- Args.term) (output pretty_term_style)),
   562   ("term_type", args Args.term (output pretty_term_typ)),
   563   ("typeof", args Args.term (output pretty_term_typeof)),
   564   ("const", args Args.const_proper (output pretty_const)),
   565   ("abbrev", args (Scan.lift Args.name_source) (output pretty_abbrev)),
   566   ("typ", args Args.typ_abbrev (output Syntax.pretty_typ)),
   567   ("text", args (Scan.lift Args.name) (output (K pretty_text))),
   568   ("goals", output_goals true),
   569   ("subgoals", output_goals false),
   570   ("prf", args Attrib.thms (output (pretty_prf false))),
   571   ("full_prf", args Attrib.thms (output (pretty_prf true))),
   572   ("theory", args (Scan.lift Args.name) (output pretty_theory)),
   573   ("ML", args (Scan.lift Args.name_source_position) (output_ml ml_val)),
   574   ("ML_type", args (Scan.lift Args.name_source_position) (output_ml ml_type)),
   575   ("ML_struct", args (Scan.lift Args.name_source_position) (output_ml ml_struct))];
   576 
   577 end;