src/Pure/Isar/isar_syn.ML
author haftmann
Thu Nov 29 17:08:26 2007 +0100 (2007-11-29 ago)
changeset 25502 9200b36280c0
parent 25495 98f3596bec44
child 25519 8570745cb40b
permissions -rw-r--r--
instance command as rudimentary class target
     1 (*  Title:      Pure/Isar/isar_syn.ML
     2     ID:         $Id$
     3     Author:     Markus Wenzel, TU Muenchen
     4 
     5 Isar/Pure outer syntax.
     6 *)
     7 
     8 structure IsarSyn: sig end =
     9 struct
    10 
    11 structure P = OuterParse and K = OuterKeyword;
    12 
    13 
    14 (** keywords **)
    15 
    16 (*keep keywords consistent with the parsers, otherwise be prepared for
    17   unexpected errors*)
    18 
    19 val _ = OuterSyntax.keywords
    20  ["!!", "!", "%", "(", ")", "+", ",", "--", ":", "::", ";", "<", "<=",
    21   "=", "==", "=>", "?", "[", "\\<equiv>", "\\<leftharpoondown>",
    22   "\\<rightharpoonup>", "\\<rightleftharpoons>", "\\<subseteq>", "]",
    23   "advanced", "and", "assumes", "attach", "begin", "binder", "concl",
    24   "constrains", "defines", "fixes", "for", "identifier", "if",
    25   "imports", "in", "includes", "infix", "infixl", "infixr", "is",
    26   "notes", "obtains", "open", "output", "overloaded", "shows",
    27   "structure", "unchecked", "uses", "where", "|"];
    28 
    29 
    30 (** init and exit **)
    31 
    32 val _ =
    33   OuterSyntax.command "theory" "begin theory" (K.tag_theory K.thy_begin)
    34     (ThyHeader.args >> (Toplevel.print oo IsarCmd.theory));
    35 
    36 val _ =
    37   OuterSyntax.command "end" "end (local) theory" (K.tag_theory K.thy_end)
    38     (Scan.succeed (Toplevel.exit o Toplevel.end_local_theory));
    39 
    40 
    41 (** markup commands **)
    42 
    43 val _ = OuterSyntax.markup_command ThyOutput.Markup "header" "theory header" K.diag
    44   (P.position P.text >> IsarCmd.add_header);
    45 
    46 val _ = OuterSyntax.markup_command ThyOutput.Markup "chapter" "chapter heading"
    47   K.thy_heading (P.opt_target -- P.position P.text >> IsarCmd.add_chapter);
    48 
    49 val _ = OuterSyntax.markup_command ThyOutput.Markup "section" "section heading"
    50   K.thy_heading (P.opt_target -- P.position P.text >> IsarCmd.add_section);
    51 
    52 val _ = OuterSyntax.markup_command ThyOutput.Markup "subsection" "subsection heading"
    53   K.thy_heading (P.opt_target -- P.position P.text >> IsarCmd.add_subsection);
    54 
    55 val _ =
    56   OuterSyntax.markup_command ThyOutput.Markup "subsubsection" "subsubsection heading"
    57   K.thy_heading (P.opt_target -- P.position P.text >> IsarCmd.add_subsubsection);
    58 
    59 val _ = OuterSyntax.markup_command ThyOutput.MarkupEnv "text" "formal comment (theory)"
    60   K.thy_decl (P.opt_target -- P.position P.text >> IsarCmd.add_text);
    61 
    62 val _ = OuterSyntax.markup_command ThyOutput.Verbatim "text_raw"
    63   "raw document preparation text"
    64   K.thy_decl (P.position P.text >> IsarCmd.add_text_raw);
    65 
    66 val _ = OuterSyntax.markup_command ThyOutput.Markup "sect" "formal comment (proof)"
    67   (K.tag_proof K.prf_heading) (P.position P.text >> IsarCmd.add_sect);
    68 
    69 val _ = OuterSyntax.markup_command ThyOutput.Markup "subsect" "formal comment (proof)"
    70   (K.tag_proof K.prf_heading) (P.position P.text >> IsarCmd.add_subsect);
    71 
    72 val _ = OuterSyntax.markup_command ThyOutput.Markup "subsubsect"
    73   "formal comment (proof)" (K.tag_proof K.prf_heading)
    74   (P.position P.text >> IsarCmd.add_subsubsect);
    75 
    76 val _ = OuterSyntax.markup_command ThyOutput.MarkupEnv "txt" "formal comment (proof)"
    77   (K.tag_proof K.prf_decl) (P.position P.text >> IsarCmd.add_txt);
    78 
    79 val _ = OuterSyntax.markup_command ThyOutput.Verbatim "txt_raw"
    80   "raw document preparation text (proof)" (K.tag_proof K.prf_decl)
    81   (P.position P.text >> IsarCmd.add_txt_raw);
    82 
    83 
    84 
    85 (** theory sections **)
    86 
    87 (* classes and sorts *)
    88 
    89 val _ =
    90   OuterSyntax.command "classes" "declare type classes" K.thy_decl
    91     (Scan.repeat1 (P.name -- Scan.optional ((P.$$$ "\\<subseteq>" || P.$$$ "<") |--
    92         P.!!! (P.list1 P.xname)) []) >> (Toplevel.theory o fold AxClass.axiomatize_class_cmd));
    93 
    94 val _ =
    95   OuterSyntax.command "classrel" "state inclusion of type classes (axiomatic!)" K.thy_decl
    96     (P.and_list1 (P.xname -- ((P.$$$ "\\<subseteq>" || P.$$$ "<") |-- P.!!! P.xname))
    97     >> (Toplevel.theory o AxClass.axiomatize_classrel_cmd));
    98 
    99 val _ =
   100   OuterSyntax.command "defaultsort" "declare default sort" K.thy_decl
   101     (P.sort >> (Toplevel.theory o Sign.add_defsort));
   102 
   103 val _ =
   104   OuterSyntax.command "axclass" "define axiomatic type class" K.thy_decl
   105     (P.name -- Scan.optional ((P.$$$ "\\<subseteq>" || P.$$$ "<") |--
   106         P.!!! (P.list1 P.xname)) []
   107         -- Scan.repeat (SpecParse.thm_name ":" -- (P.prop >> single))
   108       >> (fn (x, y) => Toplevel.theory (snd o Class.axclass_cmd x y)));
   109 
   110 
   111 (* types *)
   112 
   113 val _ =
   114   OuterSyntax.command "typedecl" "type declaration" K.thy_decl
   115     (P.type_args -- P.name -- P.opt_infix >> (fn ((args, a), mx) =>
   116       Toplevel.theory (ObjectLogic.typedecl (a, args, mx) #> snd)));
   117 
   118 val _ =
   119   OuterSyntax.command "types" "declare type abbreviations" K.thy_decl
   120     (Scan.repeat1
   121       (P.type_args -- P.name -- (P.$$$ "=" |-- P.!!! (P.typ -- P.opt_infix')))
   122       >> (Toplevel.theory o Sign.add_tyabbrs o
   123         map (fn ((args, a), (T, mx)) => (a, args, T, mx))));
   124 
   125 val _ =
   126   OuterSyntax.command "nonterminals" "declare types treated as grammar nonterminal symbols"
   127     K.thy_decl (Scan.repeat1 P.name >> (Toplevel.theory o Sign.add_nonterminals));
   128 
   129 val _ =
   130   OuterSyntax.command "arities" "state type arities (axiomatic!)" K.thy_decl
   131     (Scan.repeat1 P.arity >> (Toplevel.theory o fold AxClass.axiomatize_arity_cmd));
   132 
   133 
   134 (* consts and syntax *)
   135 
   136 val _ =
   137   OuterSyntax.command "judgment" "declare object-logic judgment" K.thy_decl
   138     (P.const >> (Toplevel.theory o ObjectLogic.add_judgment));
   139 
   140 val _ =
   141   OuterSyntax.command "consts" "declare constants" K.thy_decl
   142     (Scan.repeat1 P.const >> (Toplevel.theory o Sign.add_consts));
   143 
   144 val opt_overloaded = P.opt_keyword "overloaded";
   145 
   146 val _ =
   147   OuterSyntax.command "finalconsts" "declare constants as final" K.thy_decl
   148     (opt_overloaded -- Scan.repeat1 P.term >> (uncurry (Toplevel.theory oo Theory.add_finals)));
   149 
   150 val mode_spec =
   151   (P.$$$ "output" >> K ("", false)) || P.name -- Scan.optional (P.$$$ "output" >> K false) true;
   152 
   153 val opt_mode =
   154   Scan.optional (P.$$$ "(" |-- P.!!! (mode_spec --| P.$$$ ")")) Syntax.mode_default;
   155 
   156 val _ =
   157   OuterSyntax.command "syntax" "declare syntactic constants" K.thy_decl
   158     (opt_mode -- Scan.repeat1 P.const >> (Toplevel.theory o uncurry Sign.add_modesyntax));
   159 
   160 val _ =
   161   OuterSyntax.command "no_syntax" "delete syntax declarations" K.thy_decl
   162     (opt_mode -- Scan.repeat1 P.const >> (Toplevel.theory o uncurry Sign.del_modesyntax));
   163 
   164 
   165 (* translations *)
   166 
   167 val trans_pat =
   168   Scan.optional (P.$$$ "(" |-- P.!!! (P.xname --| P.$$$ ")")) "logic" -- P.string;
   169 
   170 fun trans_arrow toks =
   171   ((P.$$$ "\\<rightharpoonup>" || P.$$$ "=>") >> K Syntax.ParseRule ||
   172     (P.$$$ "\\<leftharpoondown>" || P.$$$ "<=") >> K Syntax.PrintRule ||
   173     (P.$$$ "\\<rightleftharpoons>" || P.$$$ "==") >> K Syntax.ParsePrintRule) toks;
   174 
   175 val trans_line =
   176   trans_pat -- P.!!! (trans_arrow -- trans_pat)
   177     >> (fn (left, (arr, right)) => arr (left, right));
   178 
   179 val _ =
   180   OuterSyntax.command "translations" "declare syntax translation rules" K.thy_decl
   181     (Scan.repeat1 trans_line >> (Toplevel.theory o Sign.add_trrules));
   182 
   183 val _ =
   184   OuterSyntax.command "no_translations" "remove syntax translation rules" K.thy_decl
   185     (Scan.repeat1 trans_line >> (Toplevel.theory o Sign.del_trrules));
   186 
   187 
   188 (* axioms and definitions *)
   189 
   190 val _ =
   191   OuterSyntax.command "axioms" "state arbitrary propositions (axiomatic!)" K.thy_decl
   192     (Scan.repeat1 SpecParse.spec_name >> (Toplevel.theory o IsarCmd.add_axioms));
   193 
   194 val opt_unchecked_overloaded =
   195   Scan.optional (P.$$$ "(" |-- P.!!!
   196     (((P.$$$ "unchecked" >> K true) -- Scan.optional (P.$$$ "overloaded" >> K true) false ||
   197       P.$$$ "overloaded" >> K (false, true)) --| P.$$$ ")")) (false, false);
   198 
   199 val _ =
   200   OuterSyntax.command "defs" "define constants" K.thy_decl
   201     (opt_unchecked_overloaded -- Scan.repeat1 SpecParse.spec_name
   202       >> (Toplevel.theory o IsarCmd.add_defs));
   203 
   204 
   205 (* old constdefs *)
   206 
   207 val old_constdecl =
   208   P.name --| P.where_ >> (fn x => (x, NONE, NoSyn)) ||
   209   P.name -- (P.$$$ "::" |-- P.!!! P.typ >> SOME) -- P.opt_mixfix'
   210     --| Scan.option P.where_ >> P.triple1 ||
   211   P.name -- (P.mixfix >> pair NONE) --| Scan.option P.where_ >> P.triple2;
   212 
   213 val old_constdef = Scan.option old_constdecl -- (SpecParse.opt_thm_name ":" -- P.prop);
   214 
   215 val structs =
   216   Scan.optional ((P.$$$ "(" -- P.$$$ "structure") |-- P.!!! (P.simple_fixes --| P.$$$ ")")) [];
   217 
   218 val _ =
   219   OuterSyntax.command "constdefs" "old-style constant definition" K.thy_decl
   220     (structs -- Scan.repeat1 old_constdef >> (Toplevel.theory o Constdefs.add_constdefs));
   221 
   222 
   223 (* constant definitions and abbreviations *)
   224 
   225 val constdecl =
   226   P.name --
   227     (P.where_ >> K (NONE, NoSyn) ||
   228       P.$$$ "::" |-- P.!!! ((P.typ >> SOME) -- P.opt_mixfix' --| P.where_) ||
   229       Scan.ahead (P.$$$ "(") |-- P.!!! (P.mixfix' --| P.where_ >> pair NONE))
   230   >> P.triple2;
   231 
   232 val constdef = Scan.option constdecl -- (SpecParse.opt_thm_name ":" -- P.prop);
   233 
   234 val _ =
   235   OuterSyntax.command "definition" "constant definition" K.thy_decl
   236     (P.opt_target -- constdef
   237     >> (fn (loc, args) => Toplevel.local_theory loc (#2 o Specification.definition_cmd args)));
   238 
   239 val _ =
   240   OuterSyntax.command "abbreviation" "constant abbreviation" K.thy_decl
   241     (P.opt_target -- opt_mode -- (Scan.option constdecl -- P.prop)
   242     >> (fn ((loc, mode), args) =>
   243         Toplevel.local_theory loc (Specification.abbreviation_cmd mode args)));
   244 
   245 val _ =
   246   OuterSyntax.command "notation" "add notation for constants / fixed variables" K.thy_decl
   247     (P.opt_target -- opt_mode -- P.and_list1 (P.xname -- SpecParse.locale_mixfix)
   248     >> (fn ((loc, mode), args) =>
   249         Toplevel.local_theory loc (Specification.notation_cmd true mode args)));
   250 
   251 val _ =
   252   OuterSyntax.command "no_notation" "delete notation for constants / fixed variables" K.thy_decl
   253     (P.opt_target -- opt_mode -- P.and_list1 (P.xname -- SpecParse.locale_mixfix)
   254     >> (fn ((loc, mode), args) =>
   255         Toplevel.local_theory loc (Specification.notation_cmd false mode args)));
   256 
   257 
   258 (* constant specifications *)
   259 
   260 val _ =
   261   OuterSyntax.command "axiomatization" "axiomatic constant specification" K.thy_decl
   262     (P.opt_target --
   263      (Scan.optional P.fixes [] --
   264       Scan.optional (P.where_ |-- P.!!! (P.and_list1 SpecParse.spec)) [])
   265     >> (fn (loc, (x, y)) => Toplevel.local_theory loc (#2 o Specification.axiomatization_cmd x y)));
   266 
   267 
   268 (* theorems *)
   269 
   270 fun theorems kind = P.opt_target -- SpecParse.name_facts
   271   >> (fn (loc, args) => Toplevel.local_theory loc (#2 o Specification.theorems_cmd kind args));
   272 
   273 val _ =
   274   OuterSyntax.command "theorems" "define theorems" K.thy_decl (theorems Thm.theoremK);
   275 
   276 val _ =
   277   OuterSyntax.command "lemmas" "define lemmas" K.thy_decl (theorems Thm.lemmaK);
   278 
   279 val _ =
   280   OuterSyntax.command "declare" "declare theorems (improper)" K.thy_decl
   281     (P.opt_target -- (P.and_list1 SpecParse.xthms1 >> flat)
   282       >> (fn (loc, args) => Toplevel.local_theory loc
   283           (#2 o Specification.theorems_cmd "" [(("", []), args)])));
   284 
   285 
   286 (* name space entry path *)
   287 
   288 val _ =
   289   OuterSyntax.command "global" "disable prefixing of theory name" K.thy_decl
   290     (Scan.succeed (Toplevel.theory Sign.root_path));
   291 
   292 val _ =
   293   OuterSyntax.command "local" "enable prefixing of theory name" K.thy_decl
   294     (Scan.succeed (Toplevel.theory Sign.local_path));
   295 
   296 val _ =
   297   OuterSyntax.command "hide" "hide names from given name space" K.thy_decl
   298     ((P.opt_keyword "open" >> not) -- (P.name -- Scan.repeat1 P.xname) >>
   299       (Toplevel.theory o uncurry Sign.hide_names));
   300 
   301 
   302 (* use ML text *)
   303 
   304 val _ =
   305   OuterSyntax.command "use" "eval ML text from file" (K.tag_ml K.diag)
   306     (P.path >> (Toplevel.no_timing oo IsarCmd.use));
   307 
   308 val _ =
   309   OuterSyntax.command "ML" "eval ML text (diagnostic)" (K.tag_ml K.diag)
   310     (P.text >> IsarCmd.use_mltext true);
   311 
   312 val _ =
   313   OuterSyntax.command "ML_command" "eval ML text" (K.tag_ml K.diag)
   314     (P.text >> (Toplevel.no_timing oo IsarCmd.use_mltext false));
   315 
   316 val _ =
   317   OuterSyntax.command "ML_setup" "eval ML text (may change theory)" (K.tag_ml K.thy_decl)
   318     (P.text >> IsarCmd.use_mltext_theory);
   319 
   320 val _ =
   321   OuterSyntax.command "setup" "apply ML theory setup" (K.tag_ml K.thy_decl)
   322     (Scan.option P.text >> (Toplevel.theory o IsarCmd.generic_setup));
   323 
   324 val _ =
   325   OuterSyntax.command "method_setup" "define proof method in ML" (K.tag_ml K.thy_decl)
   326     (((P.name -- P.!!! (P.$$$ "=" |-- P.text -- P.text) >> P.triple2))
   327       >> (Toplevel.theory o Method.method_setup));
   328 
   329 val _ =
   330   OuterSyntax.command "declaration" "generic ML declaration" (K.tag_ml K.thy_decl)
   331     (P.opt_target -- P.text
   332     >> (fn (loc, txt) => Toplevel.local_theory loc (IsarCmd.declaration txt)));
   333 
   334 val _ =
   335   OuterSyntax.command "simproc_setup" "define simproc in ML" (K.tag_ml K.thy_decl)
   336     (P.opt_target --
   337       P.name -- (P.$$$ "(" |-- P.enum1 "|" P.term --| P.$$$ ")" --| P.$$$ "=") -- P.text --
   338       Scan.optional (P.$$$ "identifier" |-- Scan.repeat1 P.xname) []
   339     >> (fn ((((loc, a), b), c), d) => Toplevel.local_theory loc (IsarCmd.simproc_setup a b c d)));
   340 
   341 
   342 (* translation functions *)
   343 
   344 val trfun = P.opt_keyword "advanced" -- P.text;
   345 
   346 val _ =
   347   OuterSyntax.command "parse_ast_translation" "install parse ast translation functions"
   348     (K.tag_ml K.thy_decl)
   349     (trfun >> (Toplevel.theory o IsarCmd.parse_ast_translation));
   350 
   351 val _ =
   352   OuterSyntax.command "parse_translation" "install parse translation functions"
   353     (K.tag_ml K.thy_decl)
   354     (trfun >> (Toplevel.theory o IsarCmd.parse_translation));
   355 
   356 val _ =
   357   OuterSyntax.command "print_translation" "install print translation functions"
   358     (K.tag_ml K.thy_decl)
   359     (trfun >> (Toplevel.theory o IsarCmd.print_translation));
   360 
   361 val _ =
   362   OuterSyntax.command "typed_print_translation" "install typed print translation functions"
   363     (K.tag_ml K.thy_decl)
   364     (trfun >> (Toplevel.theory o IsarCmd.typed_print_translation));
   365 
   366 val _ =
   367   OuterSyntax.command "print_ast_translation" "install print ast translation functions"
   368     (K.tag_ml K.thy_decl)
   369     (trfun >> (Toplevel.theory o IsarCmd.print_ast_translation));
   370 
   371 val _ =
   372   OuterSyntax.command "token_translation" "install token translation functions"
   373     (K.tag_ml K.thy_decl)
   374     (P.text >> (Toplevel.theory o IsarCmd.token_translation));
   375 
   376 
   377 (* oracles *)
   378 
   379 val _ =
   380   OuterSyntax.command "oracle" "declare oracle" (K.tag_ml K.thy_decl)
   381     (P.name -- (P.$$$ "(" |-- P.text --| P.$$$ ")" --| P.$$$ "=")
   382       -- P.text >> (fn ((x, y), z) => Toplevel.theory (IsarCmd.oracle x y z)));
   383 
   384 
   385 (* local theories *)
   386 
   387 val _ =
   388   OuterSyntax.command "context" "enter local theory context" K.thy_decl
   389     (P.name --| P.begin >> (fn name =>
   390       Toplevel.print o Toplevel.begin_local_theory true (TheoryTarget.context name)));
   391 
   392 
   393 (* locales *)
   394 
   395 val locale_val =
   396   SpecParse.locale_expr --
   397     Scan.optional (P.$$$ "+" |-- P.!!! (Scan.repeat1 SpecParse.context_element)) [] ||
   398   Scan.repeat1 SpecParse.context_element >> pair Locale.empty;
   399 
   400 val _ =
   401   OuterSyntax.command "locale" "define named proof context" K.thy_decl
   402     ((P.opt_keyword "open" >> (fn true => NONE | false => SOME "")) --
   403       P.name -- Scan.optional (P.$$$ "=" |-- P.!!! locale_val) (Locale.empty, []) -- P.opt_begin
   404       >> (fn (((is_open, name), (expr, elems)), begin) =>
   405           (begin ? Toplevel.print) o Toplevel.begin_local_theory begin
   406             (Locale.add_locale is_open name expr elems #-> TheoryTarget.begin)));
   407 
   408 val _ =
   409   OuterSyntax.command "interpretation"
   410     "prove and register interpretation of locale expression in theory or locale" K.thy_goal
   411     (P.xname --| (P.$$$ "\\<subseteq>" || P.$$$ "<") -- P.!!! SpecParse.locale_expr
   412       >> (Toplevel.print oo (Toplevel.theory_to_proof o Locale.interpretation_in_locale I)) ||
   413       SpecParse.opt_thm_name ":" -- SpecParse.locale_expr -- SpecParse.locale_insts
   414         >> (fn ((x, y), z) => Toplevel.print o
   415             Toplevel.theory_to_proof (Locale.interpretation I (apfst (pair true) x) y z)));
   416 
   417 val _ =
   418   OuterSyntax.command "interpret"
   419     "prove and register interpretation of locale expression in proof context"
   420     (K.tag_proof K.prf_goal)
   421     (SpecParse.opt_thm_name ":" -- SpecParse.locale_expr -- SpecParse.locale_insts
   422       >> (fn ((x, y), z) => Toplevel.print o
   423           Toplevel.proof' (Locale.interpret Seq.single (apfst (pair true) x) y z)));
   424 
   425 
   426 (* classes *)
   427 
   428 val class_val =
   429   SpecParse.class_expr --
   430     Scan.optional (P.$$$ "+" |-- P.!!! (Scan.repeat1 SpecParse.locale_element)) [] ||
   431   Scan.repeat1 SpecParse.locale_element >> pair [];
   432 
   433 val _ =
   434   OuterSyntax.command "class" "define type class" K.thy_decl
   435    (P.name --
   436      Scan.optional (P.$$$ "(" |-- P.$$$ "attach" |-- Scan.repeat P.term --| P.$$$ ")") [] --  (* FIXME ?? *)
   437      (P.$$$ "=" |-- class_val) -- P.opt_begin
   438     >> (fn (((name, add_consts), (supclasses, elems)), begin) =>
   439         (begin ? Toplevel.print) o Toplevel.begin_local_theory begin
   440           (Class.class_cmd name supclasses elems add_consts #-> TheoryTarget.begin)));
   441 
   442 val _ =
   443   OuterSyntax.command "subclass" "prove a subclass relation" K.thy_goal
   444     (P.opt_target -- P.xname >> (fn (loc, class) =>
   445       Toplevel.print o Toplevel.local_theory_to_proof loc (Subclass.subclass_cmd class)));
   446 
   447 val _ =
   448   OuterSyntax.command "instantiation" "prove type arity" K.thy_decl
   449    (P.and_list1 P.arity --| P.begin
   450      >> (fn arities => Toplevel.print o
   451          Toplevel.begin_local_theory true (Instance.instantiation_cmd arities)));
   452 
   453 val _ =
   454   OuterSyntax.command "instance" "prove type arity or subclass relation" K.thy_goal
   455   ((P.xname -- ((P.$$$ "\\<subseteq>" || P.$$$ "<") |-- P.!!! P.xname) >> Class.classrel_cmd ||
   456     P.and_list1 P.arity -- Scan.repeat (SpecParse.opt_thm_name ":" -- P.prop)
   457       >> (fn (arities, defs) => Instance.instance_cmd arities defs))
   458     >> (Toplevel.print oo Toplevel.theory_to_proof)
   459   || Scan.succeed (Toplevel.print o Toplevel.local_theory_to_proof NONE (Class.instantiation_instance I)));
   460 
   461 
   462 (* code generation *)
   463 
   464 val _ =
   465   OuterSyntax.command "code_datatype" "define set of code datatype constructors" K.thy_decl
   466     (Scan.repeat1 P.term >> (Toplevel.theory o Code.add_datatype_cmd));
   467 
   468 
   469 
   470 (** proof commands **)
   471 
   472 (* statements *)
   473 
   474 fun gen_theorem kind =
   475   OuterSyntax.command kind ("state " ^ kind) K.thy_goal
   476     (P.opt_target -- Scan.optional (SpecParse.opt_thm_name ":" --|
   477       Scan.ahead (SpecParse.locale_keyword || SpecParse.statement_keyword)) ("", []) --
   478       SpecParse.general_statement >> (fn ((loc, a), (elems, concl)) =>
   479       (Toplevel.print o
   480        Toplevel.local_theory_to_proof' loc
   481          (Specification.theorem_cmd kind NONE (K I) a elems concl))));
   482 
   483 val _ = gen_theorem Thm.theoremK;
   484 val _ = gen_theorem Thm.lemmaK;
   485 val _ = gen_theorem Thm.corollaryK;
   486 
   487 val _ =
   488   OuterSyntax.command "have" "state local goal"
   489     (K.tag_proof K.prf_goal)
   490     (SpecParse.statement >> ((Toplevel.print oo Toplevel.proof') o IsarCmd.have));
   491 
   492 val _ =
   493   OuterSyntax.command "hence" "abbreviates \"then have\""
   494     (K.tag_proof K.prf_goal)
   495     (SpecParse.statement >> ((Toplevel.print oo Toplevel.proof') o IsarCmd.hence));
   496 
   497 val _ =
   498   OuterSyntax.command "show" "state local goal, solving current obligation"
   499     (K.tag_proof K.prf_asm_goal)
   500     (SpecParse.statement >> ((Toplevel.print oo Toplevel.proof') o IsarCmd.show));
   501 
   502 val _ =
   503   OuterSyntax.command "thus" "abbreviates \"then show\""
   504     (K.tag_proof K.prf_asm_goal)
   505     (SpecParse.statement >> ((Toplevel.print oo Toplevel.proof') o IsarCmd.thus));
   506 
   507 
   508 (* facts *)
   509 
   510 val facts = P.and_list1 SpecParse.xthms1;
   511 
   512 val _ =
   513   OuterSyntax.command "then" "forward chaining"
   514     (K.tag_proof K.prf_chain)
   515     (Scan.succeed (Toplevel.print o Toplevel.proof Proof.chain));
   516 
   517 val _ =
   518   OuterSyntax.command "from" "forward chaining from given facts"
   519     (K.tag_proof K.prf_chain)
   520     (facts >> (Toplevel.print oo (Toplevel.proof o Proof.from_thmss)));
   521 
   522 val _ =
   523   OuterSyntax.command "with" "forward chaining from given and current facts"
   524     (K.tag_proof K.prf_chain)
   525     (facts >> (Toplevel.print oo (Toplevel.proof o Proof.with_thmss)));
   526 
   527 val _ =
   528   OuterSyntax.command "note" "define facts"
   529     (K.tag_proof K.prf_decl)
   530     (SpecParse.name_facts >> (Toplevel.print oo (Toplevel.proof o Proof.note_thmss)));
   531 
   532 val _ =
   533   OuterSyntax.command "using" "augment goal facts"
   534     (K.tag_proof K.prf_decl)
   535     (facts >> (Toplevel.print oo (Toplevel.proof o Proof.using)));
   536 
   537 val _ =
   538   OuterSyntax.command "unfolding" "unfold definitions in goal and facts"
   539     (K.tag_proof K.prf_decl)
   540     (facts >> (Toplevel.print oo (Toplevel.proof o Proof.unfolding)));
   541 
   542 
   543 (* proof context *)
   544 
   545 val _ =
   546   OuterSyntax.command "fix" "fix local variables (Skolem constants)"
   547     (K.tag_proof K.prf_asm)
   548     (P.fixes >> (Toplevel.print oo (Toplevel.proof o Proof.fix)));
   549 
   550 val _ =
   551   OuterSyntax.command "assume" "assume propositions"
   552     (K.tag_proof K.prf_asm)
   553     (SpecParse.statement >> (Toplevel.print oo (Toplevel.proof o Proof.assume)));
   554 
   555 val _ =
   556   OuterSyntax.command "presume" "assume propositions, to be established later"
   557     (K.tag_proof K.prf_asm)
   558     (SpecParse.statement >> (Toplevel.print oo (Toplevel.proof o Proof.presume)));
   559 
   560 val _ =
   561   OuterSyntax.command "def" "local definition"
   562     (K.tag_proof K.prf_asm)
   563     (P.and_list1
   564       (SpecParse.opt_thm_name ":" --
   565         ((P.name -- P.opt_mixfix) -- ((P.$$$ "\\<equiv>" || P.$$$ "==") |-- P.!!! P.termp)))
   566     >> (Toplevel.print oo (Toplevel.proof o Proof.def)));
   567 
   568 val _ =
   569   OuterSyntax.command "obtain" "generalized existence"
   570     (K.tag_proof K.prf_asm_goal)
   571     (P.parname -- Scan.optional (P.fixes --| P.where_) [] -- SpecParse.statement
   572       >> (fn ((x, y), z) => Toplevel.print o Toplevel.proof' (Obtain.obtain x y z)));
   573 
   574 val _ =
   575   OuterSyntax.command "guess" "wild guessing (unstructured)"
   576     (K.tag_proof K.prf_asm_goal)
   577     (Scan.optional P.fixes [] >> (Toplevel.print oo (Toplevel.proof' o Obtain.guess)));
   578 
   579 val _ =
   580   OuterSyntax.command "let" "bind text variables"
   581     (K.tag_proof K.prf_decl)
   582     (P.and_list1 (P.enum1 "and" P.term -- (P.$$$ "=" |-- P.term))
   583       >> (Toplevel.print oo (Toplevel.proof o Proof.let_bind)));
   584 
   585 val case_spec =
   586   (P.$$$ "(" |-- P.!!! (P.xname -- Scan.repeat1 (P.maybe P.name) --| P.$$$ ")") ||
   587     P.xname >> rpair []) -- SpecParse.opt_attribs >> P.triple1;
   588 
   589 val _ =
   590   OuterSyntax.command "case" "invoke local context"
   591     (K.tag_proof K.prf_asm)
   592     (case_spec >> (Toplevel.print oo (Toplevel.proof o Proof.invoke_case)));
   593 
   594 
   595 (* proof structure *)
   596 
   597 val _ =
   598   OuterSyntax.command "{" "begin explicit proof block"
   599     (K.tag_proof K.prf_open)
   600     (Scan.succeed (Toplevel.print o Toplevel.proof Proof.begin_block));
   601 
   602 val _ =
   603   OuterSyntax.command "}" "end explicit proof block"
   604     (K.tag_proof K.prf_close)
   605     (Scan.succeed (Toplevel.print o Toplevel.proof Proof.end_block));
   606 
   607 val _ =
   608   OuterSyntax.command "next" "enter next proof block"
   609     (K.tag_proof K.prf_block)
   610     (Scan.succeed (Toplevel.print o Toplevel.proof Proof.next_block));
   611 
   612 
   613 (* end proof *)
   614 
   615 val _ =
   616   OuterSyntax.command "qed" "conclude (sub-)proof"
   617     (K.tag_proof K.qed_block)
   618     (Scan.option Method.parse >> (Toplevel.print3 oo IsarCmd.qed));
   619 
   620 val _ =
   621   OuterSyntax.command "by" "terminal backward proof"
   622     (K.tag_proof K.qed)
   623     (Method.parse -- Scan.option Method.parse >> (Toplevel.print3 oo IsarCmd.terminal_proof));
   624 
   625 val _ =
   626   OuterSyntax.command ".." "default proof"
   627     (K.tag_proof K.qed)
   628     (Scan.succeed (Toplevel.print3 o IsarCmd.default_proof));
   629 
   630 val _ =
   631   OuterSyntax.command "." "immediate proof"
   632     (K.tag_proof K.qed)
   633     (Scan.succeed (Toplevel.print3 o IsarCmd.immediate_proof));
   634 
   635 val _ =
   636   OuterSyntax.command "done" "done proof"
   637     (K.tag_proof K.qed)
   638     (Scan.succeed (Toplevel.print3 o IsarCmd.done_proof));
   639 
   640 val _ =
   641   OuterSyntax.command "sorry" "skip proof (quick-and-dirty mode only!)"
   642     (K.tag_proof K.qed)
   643     (Scan.succeed (Toplevel.print3 o IsarCmd.skip_proof));
   644 
   645 val _ =
   646   OuterSyntax.command "oops" "forget proof"
   647     (K.tag_proof K.qed_global)
   648     (Scan.succeed Toplevel.forget_proof);
   649 
   650 
   651 (* proof steps *)
   652 
   653 val _ =
   654   OuterSyntax.command "defer" "shuffle internal proof state"
   655     (K.tag_proof K.prf_script)
   656     (Scan.option P.nat >> (Toplevel.print oo (Toplevel.proofs o Proof.defer)));
   657 
   658 val _ =
   659   OuterSyntax.command "prefer" "shuffle internal proof state"
   660     (K.tag_proof K.prf_script)
   661     (P.nat >> (Toplevel.print oo (Toplevel.proofs o Proof.prefer)));
   662 
   663 val _ =
   664   OuterSyntax.command "apply" "initial refinement step (unstructured)"
   665     (K.tag_proof K.prf_script)
   666     (Method.parse >> (Toplevel.print oo (Toplevel.proofs o Proof.apply)));
   667 
   668 val _ =
   669   OuterSyntax.command "apply_end" "terminal refinement (unstructured)"
   670     (K.tag_proof K.prf_script)
   671     (Method.parse >> (Toplevel.print oo (Toplevel.proofs o Proof.apply_end)));
   672 
   673 val _ =
   674   OuterSyntax.command "proof" "backward proof"
   675     (K.tag_proof K.prf_block)
   676     (Scan.option Method.parse >> (fn m => Toplevel.print o
   677       Toplevel.actual_proof (ProofHistory.applys (Proof.proof m)) o
   678       Toplevel.skip_proof (History.apply (fn i => i + 1))));
   679 
   680 
   681 (* calculational proof commands *)
   682 
   683 val calc_args =
   684   Scan.option (P.$$$ "(" |-- P.!!! ((SpecParse.xthms1 --| P.$$$ ")")));
   685 
   686 val _ =
   687   OuterSyntax.command "also" "combine calculation and current facts"
   688     (K.tag_proof K.prf_decl)
   689     (calc_args >> (Toplevel.proofs' o Calculation.also));
   690 
   691 val _ =
   692   OuterSyntax.command "finally" "combine calculation and current facts, exhibit result"
   693     (K.tag_proof K.prf_chain)
   694     (calc_args >> (Toplevel.proofs' o Calculation.finally_));
   695 
   696 val _ =
   697   OuterSyntax.command "moreover" "augment calculation by current facts"
   698     (K.tag_proof K.prf_decl)
   699     (Scan.succeed (Toplevel.proof' Calculation.moreover));
   700 
   701 val _ =
   702   OuterSyntax.command "ultimately" "augment calculation by current facts, exhibit result"
   703     (K.tag_proof K.prf_chain)
   704     (Scan.succeed (Toplevel.proof' Calculation.ultimately));
   705 
   706 
   707 (* proof navigation *)
   708 
   709 val _ =
   710   OuterSyntax.command "back" "backtracking of proof command"
   711     (K.tag_proof K.prf_script)
   712     (Scan.succeed (Toplevel.print o IsarCmd.back));
   713 
   714 
   715 (* history *)
   716 
   717 val _ =
   718   OuterSyntax.improper_command "cannot_undo" "report 'cannot undo' error message" K.control
   719     (P.name >> (Toplevel.no_timing oo IsarCmd.cannot_undo));
   720 
   721 val _ =
   722   OuterSyntax.improper_command "redo" "redo last command" K.control
   723     (Scan.succeed (Toplevel.no_timing o Toplevel.print o IsarCmd.redo));
   724 
   725 val _ =
   726   OuterSyntax.improper_command "undos_proof" "undo last proof commands" K.control
   727     (P.nat >> ((Toplevel.no_timing o Toplevel.print) oo IsarCmd.undos_proof));
   728 
   729 val _ =
   730   OuterSyntax.improper_command "undo" "undo last command" K.control
   731     (Scan.succeed (Toplevel.no_timing o IsarCmd.undo));
   732 
   733 val _ =
   734   OuterSyntax.improper_command "kill" "kill current history node" K.control
   735     (Scan.succeed (Toplevel.no_timing o Toplevel.print o IsarCmd.kill));
   736 
   737 
   738 
   739 (** diagnostic commands (for interactive mode only) **)
   740 
   741 val opt_modes = Scan.optional (P.$$$ "(" |-- P.!!! (Scan.repeat1 P.xname --| P.$$$ ")")) [];
   742 val opt_bang = Scan.optional (P.$$$ "!" >> K true) false;
   743 
   744 val _ =
   745   OuterSyntax.improper_command "pretty_setmargin" "change default margin for pretty printing"
   746     K.diag (P.nat >> (Toplevel.no_timing oo IsarCmd.pretty_setmargin));
   747 
   748 val _ =
   749   OuterSyntax.improper_command "help" "print outer syntax commands" K.diag
   750     (Scan.succeed (Toplevel.no_timing o Toplevel.imperative OuterSyntax.print_outer_syntax));
   751 
   752 val _ =
   753   OuterSyntax.improper_command "print_commands" "print outer syntax commands" K.diag
   754     (Scan.succeed (Toplevel.no_timing o Toplevel.imperative OuterSyntax.print_outer_syntax));
   755 
   756 val _ =
   757   OuterSyntax.improper_command "print_configs" "print configuration options" K.diag
   758     (Scan.succeed (Toplevel.no_timing o IsarCmd.print_configs));
   759 
   760 val _ =
   761   OuterSyntax.improper_command "print_context" "print theory context name" K.diag
   762     (Scan.succeed (Toplevel.no_timing o IsarCmd.print_context));
   763 
   764 val _ =
   765   OuterSyntax.improper_command "print_theory" "print logical theory contents (verbose!)" K.diag
   766     (opt_bang >> (Toplevel.no_timing oo IsarCmd.print_theory));
   767 
   768 val _ =
   769   OuterSyntax.improper_command "print_syntax" "print inner syntax of context (verbose!)" K.diag
   770     (Scan.succeed (Toplevel.no_timing o IsarCmd.print_syntax));
   771 
   772 val _ =
   773   OuterSyntax.improper_command "print_abbrevs" "print constant abbreviation of context" K.diag
   774     (Scan.succeed (Toplevel.no_timing o IsarCmd.print_abbrevs));
   775 
   776 val _ =
   777   OuterSyntax.improper_command "print_theorems"
   778       "print theorems of local theory or proof context" K.diag
   779     (Scan.succeed (Toplevel.no_timing o IsarCmd.print_theorems));
   780 
   781 val _ =
   782   OuterSyntax.improper_command "print_locales" "print locales of this theory" K.diag
   783     (Scan.succeed (Toplevel.no_timing o IsarCmd.print_locales));
   784 
   785 val _ =
   786   OuterSyntax.improper_command "print_classes" "print classes of this theory" K.diag
   787     (Scan.succeed (Toplevel.no_timing o Toplevel.unknown_theory
   788       o Toplevel.keep (Class.print_classes o Toplevel.theory_of)));
   789 
   790 val _ =
   791   OuterSyntax.improper_command "print_locale" "print locale expression in this theory" K.diag
   792     (opt_bang -- locale_val >> (Toplevel.no_timing oo IsarCmd.print_locale));
   793 
   794 val _ =
   795   OuterSyntax.improper_command "print_interps"
   796     "print interpretations of named locale" K.diag
   797     (Scan.optional (P.$$$ "!" >> K true) false -- P.xname
   798       >> (Toplevel.no_timing oo uncurry IsarCmd.print_registrations));
   799 
   800 val _ =
   801   OuterSyntax.improper_command "print_attributes" "print attributes of this theory" K.diag
   802     (Scan.succeed (Toplevel.no_timing o IsarCmd.print_attributes));
   803 
   804 val _ =
   805   OuterSyntax.improper_command "print_simpset" "print context of Simplifier" K.diag
   806     (Scan.succeed (Toplevel.no_timing o IsarCmd.print_simpset));
   807 
   808 val _ =
   809   OuterSyntax.improper_command "print_rules" "print intro/elim rules" K.diag
   810     (Scan.succeed (Toplevel.no_timing o IsarCmd.print_rules));
   811 
   812 val _ =
   813   OuterSyntax.improper_command "print_trans_rules" "print transitivity rules" K.diag
   814     (Scan.succeed (Toplevel.no_timing o IsarCmd.print_trans_rules));
   815 
   816 val _ =
   817   OuterSyntax.improper_command "print_methods" "print methods of this theory" K.diag
   818     (Scan.succeed (Toplevel.no_timing o IsarCmd.print_methods));
   819 
   820 val _ =
   821   OuterSyntax.improper_command "print_antiquotations" "print antiquotations (global)" K.diag
   822     (Scan.succeed (Toplevel.no_timing o IsarCmd.print_antiquotations));
   823 
   824 val _ =
   825   OuterSyntax.improper_command "thy_deps" "visualize theory dependencies"
   826     K.diag (Scan.succeed (Toplevel.no_timing o IsarCmd.thy_deps));
   827 
   828 val _ =
   829   OuterSyntax.improper_command "class_deps" "visualize class dependencies"
   830     K.diag (Scan.succeed (Toplevel.no_timing o IsarCmd.class_deps));
   831 
   832 val _ =
   833   OuterSyntax.improper_command "thm_deps" "visualize theorem dependencies"
   834     K.diag (SpecParse.xthms1 >> (Toplevel.no_timing oo IsarCmd.thm_deps));
   835 
   836 local
   837 
   838 val criterion =
   839   P.reserved "name" |-- P.!!! (P.$$$ ":" |-- P.xname) >> FindTheorems.Name ||
   840   P.reserved "intro" >> K FindTheorems.Intro ||
   841   P.reserved "elim" >> K FindTheorems.Elim ||
   842   P.reserved "dest" >> K FindTheorems.Dest ||
   843   P.reserved "simp" |-- P.!!! (P.$$$ ":" |-- P.term) >> FindTheorems.Simp ||
   844   P.term >> FindTheorems.Pattern;
   845 
   846 val options =
   847   Scan.optional
   848     (P.$$$ "(" |--
   849       P.!!! (Scan.option P.nat -- Scan.optional (P.reserved "with_dups" >> K false) true
   850         --| P.$$$ ")")) (NONE, true);
   851 in
   852 
   853 val _ =
   854   OuterSyntax.improper_command "find_theorems" "print theorems meeting specified criteria" K.diag
   855     (options -- Scan.repeat (((Scan.option P.minus >> is_none) -- criterion))
   856       >> (Toplevel.no_timing oo IsarCmd.find_theorems));
   857 
   858 end;
   859 
   860 val _ =
   861   OuterSyntax.improper_command "print_binds" "print term bindings of proof context" K.diag
   862     (Scan.succeed (Toplevel.no_timing o IsarCmd.print_binds));
   863 
   864 val _ =
   865   OuterSyntax.improper_command "print_facts" "print facts of proof context" K.diag
   866     (Scan.succeed (Toplevel.no_timing o IsarCmd.print_facts));
   867 
   868 val _ =
   869   OuterSyntax.improper_command "print_cases" "print cases of proof context" K.diag
   870     (Scan.succeed (Toplevel.no_timing o IsarCmd.print_cases));
   871 
   872 val _ =
   873   OuterSyntax.improper_command "print_statement" "print theorems as long statements" K.diag
   874     (opt_modes -- SpecParse.xthms1 >> (Toplevel.no_timing oo IsarCmd.print_stmts));
   875 
   876 val _ =
   877   OuterSyntax.improper_command "thm" "print theorems" K.diag
   878     (opt_modes -- SpecParse.xthms1 >> (Toplevel.no_timing oo IsarCmd.print_thms));
   879 
   880 val _ =
   881   OuterSyntax.improper_command "prf" "print proof terms of theorems" K.diag
   882     (opt_modes -- Scan.option SpecParse.xthms1
   883       >> (Toplevel.no_timing oo IsarCmd.print_prfs false));
   884 
   885 val _ =
   886   OuterSyntax.improper_command "full_prf" "print full proof terms of theorems" K.diag
   887     (opt_modes -- Scan.option SpecParse.xthms1 >> (Toplevel.no_timing oo IsarCmd.print_prfs true));
   888 
   889 val _ =
   890   OuterSyntax.improper_command "prop" "read and print proposition" K.diag
   891     (opt_modes -- P.term >> (Toplevel.no_timing oo IsarCmd.print_prop));
   892 
   893 val _ =
   894   OuterSyntax.improper_command "term" "read and print term" K.diag
   895     (opt_modes -- P.term >> (Toplevel.no_timing oo IsarCmd.print_term));
   896 
   897 val _ =
   898   OuterSyntax.improper_command "typ" "read and print type" K.diag
   899     (opt_modes -- P.typ >> (Toplevel.no_timing oo IsarCmd.print_type));
   900 
   901 val _ =
   902   OuterSyntax.improper_command "print_codesetup" "print code generator setup of this theory" K.diag
   903     (Scan.succeed
   904       (Toplevel.no_timing o Toplevel.unknown_theory o Toplevel.keep
   905         (Code.print_codesetup o Toplevel.theory_of)));
   906 
   907 
   908 (** system commands (for interactive mode only) **)
   909 
   910 val _ =
   911   OuterSyntax.improper_command "cd" "change current working directory" K.diag
   912     (P.path >> (Toplevel.no_timing oo IsarCmd.cd));
   913 
   914 val _ =
   915   OuterSyntax.improper_command "pwd" "print current working directory" K.diag
   916     (Scan.succeed (Toplevel.no_timing o IsarCmd.pwd));
   917 
   918 val _ =
   919   OuterSyntax.improper_command "use_thy" "use theory file" K.diag
   920     (P.name >> (Toplevel.no_timing oo IsarCmd.use_thy));
   921 
   922 val _ =
   923   OuterSyntax.improper_command "touch_thy" "outdate theory, including descendants" K.diag
   924     (P.name >> (Toplevel.no_timing oo IsarCmd.touch_thy));
   925 
   926 val _ =
   927   OuterSyntax.improper_command "touch_child_thys" "outdate child theories" K.diag
   928     (P.name >> (Toplevel.no_timing oo IsarCmd.touch_child_thys));
   929 
   930 val _ =
   931   OuterSyntax.improper_command "remove_thy" "remove theory from loader database" K.diag
   932     (P.name >> (Toplevel.no_timing oo IsarCmd.remove_thy));
   933 
   934 val _ =
   935   OuterSyntax.improper_command "kill_thy" "kill theory -- try to remove from loader database"
   936     K.diag (P.name >> (Toplevel.no_timing oo IsarCmd.kill_thy));
   937 
   938 val _ =
   939   OuterSyntax.improper_command "display_drafts" "display raw source files with symbols"
   940     K.diag (Scan.repeat1 P.path >> (Toplevel.no_timing oo IsarCmd.display_drafts));
   941 
   942 val _ =
   943   OuterSyntax.improper_command "print_drafts" "print raw source files with symbols"
   944     K.diag (Scan.repeat1 P.path >> (Toplevel.no_timing oo IsarCmd.print_drafts));
   945 
   946 val opt_limits =
   947   Scan.option P.nat -- Scan.option (P.$$$ "," |-- P.!!! P.nat);
   948 
   949 val _ =
   950   OuterSyntax.improper_command "pr" "print current proof state (if present)" K.diag
   951     (opt_modes -- opt_limits >> (Toplevel.no_timing oo IsarCmd.pr));
   952 
   953 val _ =
   954   OuterSyntax.improper_command "disable_pr" "disable printing of toplevel state" K.diag
   955     (Scan.succeed (Toplevel.no_timing o IsarCmd.disable_pr));
   956 
   957 val _ =
   958   OuterSyntax.improper_command "enable_pr" "enable printing of toplevel state" K.diag
   959     (Scan.succeed (Toplevel.no_timing o IsarCmd.enable_pr));
   960 
   961 val _ =
   962   OuterSyntax.improper_command "commit" "commit current session to ML database" K.diag
   963     (P.opt_unit >> (Toplevel.no_timing oo K IsarCmd.use_commit));
   964 
   965 val _ =
   966   OuterSyntax.improper_command "quit" "quit Isabelle" K.control
   967     (P.opt_unit >> (Toplevel.no_timing oo K IsarCmd.quit));
   968 
   969 val _ =
   970   OuterSyntax.improper_command "exit" "exit Isar loop" K.control
   971     (Scan.succeed (Toplevel.no_timing o IsarCmd.exit));
   972 
   973 val _ =
   974   OuterSyntax.improper_command "init_toplevel" "restart Isar toplevel loop" K.control
   975     (Scan.succeed (Toplevel.no_timing o IsarCmd.init_toplevel));
   976 
   977 val _ =
   978   OuterSyntax.improper_command "welcome" "print welcome message" K.diag
   979     (Scan.succeed (Toplevel.no_timing o IsarCmd.welcome));
   980 
   981 end;