src/Pure/Isar/isar_thy.ML
author wenzelm
Wed Aug 25 20:39:50 1999 +0200 (1999-08-25 ago)
changeset 7353 b5a5abea1559
parent 7332 60534b9018ae
child 7417 70c1d3eac214
permissions -rw-r--r--
improved msg;
     1 (*  Title:      Pure/Isar/isar_thy.ML
     2     ID:         $Id$
     3     Author:     Markus Wenzel, TU Muenchen
     4 
     5 Pure/Isar derived theory operations.
     6 *)
     7 
     8 signature ISAR_THY =
     9 sig
    10   val add_title: Comment.text -> Comment.text -> Comment.text -> theory -> theory
    11   val add_chapter: Comment.text -> theory -> theory
    12   val add_section: Comment.text -> theory -> theory
    13   val add_subsection: Comment.text -> theory -> theory
    14   val add_subsubsection: Comment.text -> theory -> theory
    15   val add_text: Comment.text -> theory -> theory
    16   val add_sect: Comment.text -> ProofHistory.T -> ProofHistory.T
    17   val add_subsect: Comment.text -> ProofHistory.T -> ProofHistory.T
    18   val add_subsubsect: Comment.text -> ProofHistory.T -> ProofHistory.T
    19   val add_txt: Comment.text -> ProofHistory.T -> ProofHistory.T
    20   val add_classes: (bclass * xclass list) list * Comment.text -> theory -> theory
    21   val add_classes_i: (bclass * class list) list * Comment.text  -> theory -> theory
    22   val add_classrel: (xclass * xclass) * Comment.text -> theory -> theory
    23   val add_classrel_i: (class * class) * Comment.text -> theory -> theory
    24   val add_defsort: xsort * Comment.text -> theory -> theory
    25   val add_defsort_i: sort * Comment.text -> theory -> theory
    26   val add_nonterminals: (bstring * Comment.text) list -> theory -> theory
    27   val add_tyabbrs: ((bstring * string list * string * mixfix) * Comment.text) list
    28     -> theory -> theory
    29   val add_tyabbrs_i: ((bstring * string list * typ * mixfix) * Comment.text) list
    30     -> theory -> theory
    31   val add_arities: ((xstring * xsort list * xsort) * Comment.text) list -> theory -> theory
    32   val add_arities_i: ((string * sort list * sort) * Comment.text) list -> theory -> theory
    33   val add_typedecl: (bstring * string list * mixfix) * Comment.text -> theory -> theory
    34   val add_consts: ((bstring * string * mixfix) * Comment.text) list -> theory -> theory
    35   val add_consts_i: ((bstring * typ * mixfix) * Comment.text) list -> theory -> theory
    36   val add_modesyntax: string * bool -> ((bstring * string * mixfix) * Comment.text) list
    37     -> theory -> theory
    38   val add_modesyntax_i: string * bool -> ((bstring * typ * mixfix) * Comment.text) list
    39     -> theory -> theory
    40   val add_trrules: ((xstring * string) Syntax.trrule * Comment.text) list -> theory -> theory
    41   val add_trrules_i: (Syntax.ast Syntax.trrule * Comment.text) list -> theory -> theory
    42   val add_axioms: (((bstring * string) * Args.src list) * Comment.text) list -> theory -> theory
    43   val add_axioms_i: (((bstring * term) * theory attribute list) * Comment.text) list
    44     -> theory -> theory
    45   val add_defs: (((bstring * string) * Args.src list) * Comment.text) list -> theory -> theory
    46   val add_defs_i: (((bstring * term) * theory attribute list) * Comment.text) list
    47     -> theory -> theory
    48   val add_constdefs: (((bstring * string * mixfix) * Comment.text) * (string * Comment.text)) list
    49     -> theory -> theory
    50   val add_constdefs_i: (((bstring * typ * mixfix) * Comment.text) * (term * Comment.text)) list
    51     -> theory -> theory
    52   val apply_theorems: (xstring * Args.src list) list -> theory -> theory * thm list
    53   val apply_theorems_i: (thm * theory attribute list) list -> theory -> theory * thm list
    54   val have_theorems: ((bstring * Args.src list) * (xstring * Args.src list) list) * Comment.text
    55     -> theory -> theory
    56   val have_theorems_i: ((bstring * theory attribute list) * (thm * theory attribute list) list)
    57     * Comment.text -> theory -> theory
    58   val have_lemmas: ((bstring * Args.src list) * (xstring * Args.src list) list) * Comment.text
    59     -> theory -> theory
    60   val have_lemmas_i: ((bstring * theory attribute list) * (thm * theory attribute list) list)
    61     * Comment.text -> theory -> theory
    62   val have_facts: ((string * Args.src list) * (string * Args.src list) list) * Comment.text
    63     -> ProofHistory.T -> ProofHistory.T
    64   val have_facts_i: ((string * Proof.context attribute list) *
    65     (thm * Proof.context attribute list) list) * Comment.text -> ProofHistory.T -> ProofHistory.T
    66   val from_facts: (string * Args.src list) list * Comment.text -> ProofHistory.T -> ProofHistory.T
    67   val from_facts_i: (thm * Proof.context attribute list) list * Comment.text
    68     -> ProofHistory.T -> ProofHistory.T
    69   val with_facts: (string * Args.src list) list * Comment.text -> ProofHistory.T -> ProofHistory.T
    70   val with_facts_i: (thm * Proof.context attribute list) list * Comment.text
    71     -> ProofHistory.T -> ProofHistory.T
    72   val chain: Comment.text -> ProofHistory.T -> ProofHistory.T
    73   val export_chain: Comment.text -> ProofHistory.T -> ProofHistory.T
    74   val fix: (string * string option) list * Comment.text -> ProofHistory.T -> ProofHistory.T
    75   val fix_i: (string * typ) list * Comment.text -> ProofHistory.T -> ProofHistory.T
    76   val match_bind: ((string list * string) * Comment.text) list -> ProofHistory.T -> ProofHistory.T
    77   val match_bind_i: ((term list * term) * Comment.text) list -> ProofHistory.T -> ProofHistory.T
    78   val theorem: (bstring * Args.src list * (string * (string list * string list)))
    79     * Comment.text -> bool -> theory -> ProofHistory.T
    80   val theorem_i: (bstring * theory attribute list * (term * (term list * term list)))
    81     * Comment.text -> bool -> theory -> ProofHistory.T
    82   val lemma: (bstring * Args.src list * (string * (string list * string list)))
    83     * Comment.text -> bool -> theory -> ProofHistory.T
    84   val lemma_i: (bstring * theory attribute list * (term * (term list * term list)))
    85     * Comment.text -> bool -> theory -> ProofHistory.T
    86   val assume: ((string * Args.src list * (string * (string list * string list)) list)
    87     * Comment.text) list -> ProofHistory.T -> ProofHistory.T
    88   val assume_i: ((string * Proof.context attribute list * (term * (term list * term list)) list)
    89     * Comment.text) list -> ProofHistory.T -> ProofHistory.T
    90   val presume: ((string * Args.src list * (string * (string list * string list)) list)
    91     * Comment.text) list -> ProofHistory.T -> ProofHistory.T
    92   val presume_i: ((string * Proof.context attribute list * (term * (term list * term list)) list)
    93     * Comment.text) list -> ProofHistory.T -> ProofHistory.T
    94   val local_def: (string * Args.src list * ((string * string option) * (string * string list)))
    95     * Comment.text -> ProofHistory.T -> ProofHistory.T
    96   val local_def_i: (string * Args.src list * ((string * typ) * (term * term list)))
    97     * Comment.text -> ProofHistory.T -> ProofHistory.T
    98   val show: (string * Args.src list * (string * (string list * string list)))
    99     * Comment.text -> ProofHistory.T -> ProofHistory.T
   100   val show_i: (string * Proof.context attribute list * (term * (term list * term list)))
   101     * Comment.text -> ProofHistory.T -> ProofHistory.T
   102   val have: (string * Args.src list * (string * (string list * string list)))
   103     * Comment.text -> ProofHistory.T -> ProofHistory.T
   104   val have_i: (string * Proof.context attribute list * (term * (term list * term list)))
   105     * Comment.text -> ProofHistory.T -> ProofHistory.T
   106   val thus: (string * Args.src list * (string * (string list * string list)))
   107     * Comment.text -> ProofHistory.T -> ProofHistory.T
   108   val thus_i: (string * Proof.context attribute list * (term * (term list * term list)))
   109     * Comment.text -> ProofHistory.T -> ProofHistory.T
   110   val hence: (string * Args.src list * (string * (string list * string list)))
   111     * Comment.text -> ProofHistory.T -> ProofHistory.T
   112   val hence_i: (string * Proof.context attribute list * (term * (term list * term list)))
   113     * Comment.text -> ProofHistory.T -> ProofHistory.T
   114   val begin_block: ProofHistory.T -> ProofHistory.T
   115   val next_block: ProofHistory.T -> ProofHistory.T
   116   val end_block: ProofHistory.T -> ProofHistory.T
   117   val tac: Method.text -> ProofHistory.T -> ProofHistory.T
   118   val then_tac: Method.text -> ProofHistory.T -> ProofHistory.T
   119   val proof: (Comment.interest * (Method.text * Comment.interest) option) * Comment.text
   120     -> ProofHistory.T -> ProofHistory.T
   121   val kill_proof: ProofHistory.T -> theory
   122   val qed: (Method.text * Comment.interest) option * Comment.text
   123     -> Toplevel.transition -> Toplevel.transition
   124   val terminal_proof: ((Method.text * Comment.interest) * (Method.text * Comment.interest) option)
   125     * Comment.text -> Toplevel.transition -> Toplevel.transition
   126   val immediate_proof: Comment.text -> Toplevel.transition -> Toplevel.transition
   127   val default_proof: Comment.text -> Toplevel.transition -> Toplevel.transition
   128   val skip_proof: Comment.text -> Toplevel.transition -> Toplevel.transition
   129   val get_thmss: (string * Args.src list) list -> Proof.state -> thm list
   130   val also: ((string * Args.src list) list * Comment.interest) option * Comment.text
   131     -> Toplevel.transition -> Toplevel.transition
   132   val also_i: (thm list * Comment.interest) option * Comment.text
   133     -> Toplevel.transition -> Toplevel.transition
   134   val finally: ((string * Args.src list) list * Comment.interest) option * Comment.text
   135     -> Toplevel.transition -> Toplevel.transition
   136   val finally_i: (thm list * Comment.interest) option * Comment.text
   137     -> Toplevel.transition -> Toplevel.transition
   138   val use_mltext: string -> theory option -> theory option
   139   val use_mltext_theory: string -> theory -> theory
   140   val use_setup: string -> theory -> theory
   141   val parse_ast_translation: string -> theory -> theory
   142   val parse_translation: string -> theory -> theory
   143   val print_translation: string -> theory -> theory
   144   val typed_print_translation: string -> theory -> theory
   145   val print_ast_translation: string -> theory -> theory
   146   val token_translation: string -> theory -> theory
   147   val add_oracle: (bstring * string) * Comment.text -> theory -> theory
   148   val begin_theory: string -> string list -> (string * bool) list -> theory
   149   val end_theory: theory -> theory
   150   val theory: string * string list * (string * bool) list
   151     -> Toplevel.transition -> Toplevel.transition
   152   val context: string -> Toplevel.transition -> Toplevel.transition
   153 end;
   154 
   155 structure IsarThy: ISAR_THY =
   156 struct
   157 
   158 
   159 (** derived theory and proof operations **)
   160 
   161 (* formal comments *)
   162 
   163 fun add_text comment thy = thy:theory;
   164 fun add_title title author date thy = thy;
   165 val add_chapter = add_text;
   166 val add_section = add_text;
   167 val add_subsection = add_text;
   168 val add_subsubsection = add_text;
   169 
   170 fun add_txt comment = ProofHistory.apply Proof.assert_forward;
   171 val add_sect = add_txt;
   172 val add_subsect = add_txt;
   173 val add_subsubsect = add_txt;
   174 
   175 
   176 (* signature and syntax *)
   177 
   178 val add_classes = Theory.add_classes o Comment.ignore;
   179 val add_classes_i = Theory.add_classes_i o Comment.ignore;
   180 val add_classrel = Theory.add_classrel o single o Comment.ignore;
   181 val add_classrel_i = Theory.add_classrel_i o single o Comment.ignore;
   182 val add_defsort = Theory.add_defsort o Comment.ignore;
   183 val add_defsort_i = Theory.add_defsort_i o Comment.ignore;
   184 val add_nonterminals = Theory.add_nonterminals o map Comment.ignore;
   185 val add_tyabbrs = Theory.add_tyabbrs o map Comment.ignore;
   186 val add_tyabbrs_i = Theory.add_tyabbrs_i o map Comment.ignore;
   187 val add_arities = Theory.add_arities o map Comment.ignore;
   188 val add_arities_i = Theory.add_arities_i o map Comment.ignore;
   189 val add_typedecl = PureThy.add_typedecls o single o Comment.ignore;
   190 val add_consts = Theory.add_consts o map Comment.ignore;
   191 val add_consts_i = Theory.add_consts_i o map Comment.ignore;
   192 fun add_modesyntax mode = Theory.add_modesyntax mode o map Comment.ignore;
   193 fun add_modesyntax_i mode = Theory.add_modesyntax_i mode o map Comment.ignore;
   194 val add_trrules = Theory.add_trrules o map Comment.ignore;
   195 val add_trrules_i = Theory.add_trrules_i o map Comment.ignore;
   196 
   197 
   198 
   199 (* axioms and defs *)
   200 
   201 fun add_axms f args thy =
   202   f (map (fn (x, srcs) => (x, map (Attrib.global_attribute thy) srcs)) args) thy;
   203 
   204 val add_axioms = add_axms PureThy.add_axioms o map Comment.ignore;
   205 val add_axioms_i = PureThy.add_axioms_i o map Comment.ignore;
   206 val add_defs = add_axms PureThy.add_defs o map Comment.ignore;
   207 val add_defs_i = PureThy.add_defs_i o map Comment.ignore;
   208 
   209 
   210 (* constdefs *)
   211 
   212 fun gen_add_constdefs consts defs args thy =
   213   thy
   214   |> consts (map (Comment.ignore o fst) args)
   215   |> defs (map (fn (((c, _, mx), _), (s, _)) =>
   216     (((Thm.def_name (Syntax.const_name c mx), s), []), Comment.none)) args);
   217 
   218 fun add_constdefs args = gen_add_constdefs Theory.add_consts add_defs args;
   219 fun add_constdefs_i args = gen_add_constdefs Theory.add_consts_i add_defs_i args;
   220 
   221 
   222 (* theorems *)
   223 
   224 fun gen_have_thmss get attrib f ((name, more_srcs), th_srcs) x =
   225   f name (map (attrib x) more_srcs)
   226     (map (fn (s, srcs) => (get x s, map (attrib x) srcs)) th_srcs) x;
   227 
   228 fun global_have_thmss x = gen_have_thmss PureThy.get_thms Attrib.global_attribute x;
   229 
   230 fun local_have_thmss x =
   231   gen_have_thmss (ProofContext.get_thms o Proof.context_of)
   232     (Attrib.local_attribute o Proof.theory_of) x;
   233 
   234 fun gen_have_thmss_i f ((name, more_atts), th_atts) =
   235   f name more_atts (map (apfst single) th_atts);
   236 
   237 fun have_lemss name atts = PureThy.have_thmss name (atts @ [Drule.tag_lemma]);
   238 
   239 
   240 fun apply_theorems th_srcs = global_have_thmss PureThy.have_thmss ((None, []), th_srcs);
   241 fun apply_theorems_i th_srcs = gen_have_thmss_i PureThy.have_thmss ((None, []), th_srcs);
   242 val have_theorems = #1 oo (global_have_thmss (PureThy.have_thmss o Some) o Comment.ignore);
   243 val have_theorems_i = #1 oo (gen_have_thmss_i (PureThy.have_thmss o Some) o Comment.ignore);
   244 val have_lemmas = #1 oo (global_have_thmss (have_lemss o Some) o Comment.ignore);
   245 val have_lemmas_i = #1 oo (gen_have_thmss_i (have_lemss o Some) o Comment.ignore);
   246 val have_facts = ProofHistory.apply o local_have_thmss (Proof.have_thmss []) o Comment.ignore;
   247 val have_facts_i = ProofHistory.apply o gen_have_thmss_i (Proof.have_thmss []) o Comment.ignore;
   248 
   249 
   250 (* forward chaining *)
   251 
   252 fun gen_from_facts f = ProofHistory.apply o (Proof.chain oo curry f ("", []));
   253 
   254 fun add_thmss name atts ths_atts state =
   255   Proof.have_thmss (Proof.the_facts state) name atts ths_atts state;
   256 
   257 val from_facts = gen_from_facts (local_have_thmss (Proof.have_thmss [])) o Comment.ignore;
   258 val from_facts_i = gen_from_facts (gen_have_thmss_i (Proof.have_thmss [])) o Comment.ignore;
   259 val with_facts = gen_from_facts (local_have_thmss add_thmss) o Comment.ignore;
   260 val with_facts_i = gen_from_facts (gen_have_thmss_i add_thmss) o Comment.ignore;
   261 
   262 fun chain comment_ignore = ProofHistory.apply Proof.chain;
   263 fun export_chain comment_ignore = ProofHistory.applys Proof.export_chain;
   264 
   265 
   266 (* context *)
   267 
   268 val fix = ProofHistory.apply o Proof.fix o Comment.ignore;
   269 val fix_i = ProofHistory.apply o Proof.fix_i o Comment.ignore;
   270 val match_bind = ProofHistory.apply o Proof.match_bind o map Comment.ignore;
   271 val match_bind_i = ProofHistory.apply o Proof.match_bind_i o map Comment.ignore;
   272 
   273 
   274 (* statements *)
   275 
   276 local
   277 
   278 fun global_statement f (name, src, s) int thy =
   279   ProofHistory.init (Toplevel.undo_limit int)
   280     (f name (map (Attrib.global_attribute thy) src) s thy);
   281 
   282 fun global_statement_i f (name, atts, t) int thy =
   283   ProofHistory.init (Toplevel.undo_limit int) (f name atts t thy);
   284 
   285 fun local_statement f g (name, src, s) = ProofHistory.apply (fn state =>
   286   f name (map (Attrib.local_attribute (Proof.theory_of state)) src) s (g state));
   287 
   288 fun local_statement_i f g (name, atts, t) = ProofHistory.apply (f name atts t o g);
   289 
   290 fun multi_statement f args = ProofHistory.apply (fn state =>
   291   f (map (fn (name, src, s) =>
   292       (name, map (Attrib.local_attribute (Proof.theory_of state)) src, s)) args) state);
   293 
   294 fun multi_statement_i f args = ProofHistory.apply (f args);
   295 
   296 in
   297 
   298 val theorem     = global_statement Proof.theorem o Comment.ignore;
   299 val theorem_i   = global_statement_i Proof.theorem_i o Comment.ignore;
   300 val lemma       = global_statement Proof.lemma o Comment.ignore;
   301 val lemma_i     = global_statement_i Proof.lemma_i o Comment.ignore;
   302 val assume      = multi_statement Proof.assume o map Comment.ignore;
   303 val assume_i    = multi_statement_i Proof.assume_i o map Comment.ignore;
   304 val presume     = multi_statement Proof.presume o map Comment.ignore;
   305 val presume_i   = multi_statement_i Proof.presume_i o map Comment.ignore;
   306 val local_def   = local_statement LocalDefs.def I o Comment.ignore;
   307 val local_def_i = local_statement LocalDefs.def_i I o Comment.ignore;
   308 val show        = local_statement (Proof.show Seq.single) I o Comment.ignore;
   309 val show_i      = local_statement_i (Proof.show_i Seq.single) I o Comment.ignore;
   310 val have        = local_statement (Proof.have Seq.single) I o Comment.ignore;
   311 val have_i      = local_statement_i (Proof.have_i Seq.single) I o Comment.ignore;
   312 val thus        = local_statement (Proof.show Seq.single) Proof.chain o Comment.ignore;
   313 val thus_i      = local_statement_i (Proof.show_i Seq.single) Proof.chain o Comment.ignore;
   314 val hence       = local_statement (Proof.have Seq.single) Proof.chain o Comment.ignore;
   315 val hence_i     = local_statement_i (Proof.have_i Seq.single) Proof.chain o Comment.ignore;
   316 
   317 end;
   318 
   319 
   320 (* blocks *)
   321 
   322 val begin_block = ProofHistory.apply Proof.begin_block;
   323 val next_block = ProofHistory.apply Proof.next_block;
   324 val end_block = ProofHistory.applys Proof.end_block;
   325 
   326 
   327 (* backward steps *)
   328 
   329 val tac = ProofHistory.applys o Method.tac;
   330 val then_tac = ProofHistory.applys o Method.then_tac;
   331 
   332 val proof = ProofHistory.applys o Method.proof o
   333   apsome Comment.ignore_interest o Comment.ignore_interest' o Comment.ignore;
   334 
   335 
   336 (* print result *)
   337 
   338 fun pretty_result {kind, name, thm} =
   339   Pretty.block [Pretty.str (kind ^ " " ^ name ^ ":"), Pretty.fbrk, Proof.pretty_thm thm];
   340 
   341 fun pretty_rule thm =
   342   Pretty.block [Pretty.str "trying to solve goal by rule:", Pretty.fbrk, Proof.pretty_thm thm];
   343 
   344 val print_result = Pretty.writeln o pretty_result;
   345 
   346 fun cond_print_result_rule int =
   347   if int then (print_result, Pretty.writeln o pretty_rule)
   348   else (K (), K ());
   349 
   350 fun proof'' f = Toplevel.proof' (f o cond_print_result_rule);
   351 
   352 
   353 (* local endings *)
   354 
   355 val local_qed =
   356   proof'' o (ProofHistory.applys oo Method.local_qed) o apsome Comment.ignore_interest;
   357 
   358 fun ignore_interests (x, y) = (Comment.ignore_interest x, apsome Comment.ignore_interest y);
   359 
   360 val local_terminal_proof =
   361   proof'' o (ProofHistory.applys oo Method.local_terminal_proof) o ignore_interests;
   362 
   363 val local_immediate_proof = proof'' (ProofHistory.applys o Method.local_immediate_proof);
   364 val local_default_proof = proof'' (ProofHistory.applys o Method.local_default_proof);
   365 val local_skip_proof = proof'' (ProofHistory.applys o SkipProof.local_skip_proof);
   366 
   367 
   368 (* global endings *)
   369 
   370 val kill_proof = Proof.theory_of o ProofHistory.current;
   371 
   372 fun global_result finish = Toplevel.proof_to_theory (fn prf =>
   373   let
   374     val state = ProofHistory.current prf;
   375     val _ = if Proof.at_bottom state then () else raise Toplevel.UNDEF;
   376     val (thy, res) = finish state;
   377   in print_result res; thy end);
   378 
   379 val global_qed = global_result o Method.global_qed o apsome Comment.ignore_interest;
   380 val global_terminal_proof = global_result o Method.global_terminal_proof o ignore_interests;
   381 val global_immediate_proof = global_result Method.global_immediate_proof;
   382 val global_default_proof = global_result Method.global_default_proof;
   383 val global_skip_proof = global_result SkipProof.global_skip_proof;
   384 
   385 
   386 (* common endings *)
   387 
   388 fun qed (meth, comment) = local_qed meth o global_qed meth;
   389 fun terminal_proof (meths, comment) = local_terminal_proof meths o global_terminal_proof meths;
   390 fun immediate_proof comment = local_immediate_proof o global_immediate_proof;
   391 fun default_proof comment = local_default_proof o global_default_proof;
   392 fun skip_proof comment = local_skip_proof o global_skip_proof;
   393 
   394 
   395 (* calculational proof commands *)
   396 
   397 local
   398 
   399 fun cond_print_calc int thm =
   400   if int then Pretty.writeln (Pretty.big_list "calculation:" [Proof.pretty_thm thm])
   401   else ();
   402 
   403 fun proof''' f = Toplevel.proof' (f o cond_print_calc);
   404 
   405 fun gen_calc get f (args, _) prt state =
   406   f (apsome (fn (srcs, _) => get srcs state) args) prt state;
   407 
   408 in
   409 
   410 fun get_thmss srcs = Proof.the_facts o local_have_thmss (Proof.have_thmss []) (("", []), srcs); 
   411 fun get_thmss_i thms _ = thms;
   412 
   413 fun also x = proof''' (ProofHistory.applys o gen_calc get_thmss Calculation.also x);
   414 fun also_i x = proof''' (ProofHistory.applys o gen_calc get_thmss_i Calculation.also x);
   415 fun finally x = proof''' (ProofHistory.applys o gen_calc get_thmss Calculation.finally x);
   416 fun finally_i x = proof''' (ProofHistory.applys o gen_calc get_thmss_i Calculation.finally x);
   417 
   418 end;
   419 
   420 
   421 (* use ML text *)
   422 
   423 fun use_mltext txt opt_thy = #2 (Context.pass opt_thy (use_text false) txt);
   424 fun use_mltext_theory txt thy = #2 (Context.pass_theory thy (use_text false) txt);
   425 
   426 fun use_context txt = use_mltext_theory ("Context.>> (" ^ txt ^ ");");
   427 
   428 fun use_let name body txt =
   429   use_context ("let val " ^ name ^ " = " ^ txt ^ " in\n" ^ body ^ " end");
   430 
   431 val use_setup =
   432   use_let "setup: (theory -> theory) list" "Library.apply setup";
   433 
   434 
   435 (* translation functions *)
   436 
   437 val parse_ast_translation =
   438   use_let "parse_ast_translation: (string * (Syntax.ast list -> Syntax.ast)) list"
   439     "Theory.add_trfuns (parse_ast_translation, [], [], [])";
   440 
   441 val parse_translation =
   442   use_let "parse_translation: (string * (term list -> term)) list"
   443     "Theory.add_trfuns ([], parse_translation, [], [])";
   444 
   445 val print_translation =
   446   use_let "print_translation: (string * (term list -> term)) list"
   447     "Theory.add_trfuns ([], [], print_translation, [])";
   448 
   449 val print_ast_translation =
   450   use_let "print_ast_translation: (string * (Syntax.ast list -> Syntax.ast)) list"
   451     "Theory.add_trfuns ([], [], [], print_ast_translation)";
   452 
   453 val typed_print_translation =
   454   use_let "typed_print_translation: (string * (bool -> typ -> term list -> term)) list"
   455     "Theory.add_trfunsT typed_print_translation";
   456 
   457 val token_translation =
   458   use_let "token_translation: (string * string * (string -> string * int)) list"
   459     "Theory.add_tokentrfuns token_translation";
   460 
   461 
   462 (* add_oracle *)
   463 
   464 fun add_oracle ((name, txt), comment_ignore) =
   465   use_let
   466     "oracle: bstring * (Sign.sg * Object.T -> term)"
   467     "Theory.add_oracle oracle"
   468     ("(" ^ quote name ^ ", " ^ txt ^ ")");
   469 
   470 
   471 (* theory init and exit *)
   472 
   473 fun gen_begin_theory bg name parents files =
   474   let
   475     val paths = map (apfst Path.unpack) files;
   476     val thy = bg name parents paths;
   477   in Present.begin_theory name parents paths thy end;
   478 
   479 val begin_theory = gen_begin_theory ThyInfo.begin_theory;
   480 val begin_update_theory = gen_begin_theory ThyInfo.begin_update_theory;
   481 
   482 fun end_theory thy =
   483   (Present.end_theory (PureThy.get_name thy); ThyInfo.end_theory thy);
   484 
   485 fun kill_theory thy = ThyInfo.remove_thy (PureThy.get_name thy);
   486 
   487 
   488 fun bg_theory (name, parents, files) int =
   489   (if int then begin_update_theory else begin_theory) name parents files;
   490 
   491 fun en_theory thy = (end_theory thy; ());
   492 
   493 fun theory spec = Toplevel.init_theory (bg_theory spec) en_theory kill_theory;
   494 
   495 
   496 (* context switch *)
   497 
   498 fun context name =
   499   Toplevel.init_theory (fn _ => (the (#2 (Context.pass None ThyInfo.quiet_update_thy name))))
   500   (K ()) (K ());
   501 
   502 
   503 end;