src/Pure/Isar/isar_cmd.ML
author wenzelm
Mon Nov 09 15:34:41 1998 +0100 (1998-11-09 ago)
changeset 5831 996361157cfb
child 5880 feec44106a8e
permissions -rw-r--r--
Non-logical toplevel commands.
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(*  Title:      Pure/Isar/isar_cmd.ML
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    ID:         $Id$
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    Author:     Markus Wenzel, TU Muenchen
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Non-logical toplevel commands.
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*)
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signature ISAR_CMD =
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sig
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  val break: Toplevel.transition -> Toplevel.transition
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  val exit: Toplevel.transition -> Toplevel.transition
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  val quit: Toplevel.transition -> Toplevel.transition
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  val use: string -> Toplevel.transition -> Toplevel.transition
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  val use_mltext_theory: string -> Toplevel.transition -> Toplevel.transition
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  val use_mltext: string -> Toplevel.transition -> Toplevel.transition
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  val use_commit: Toplevel.transition -> Toplevel.transition
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  val cd: string -> Toplevel.transition -> Toplevel.transition
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  val pwd: Toplevel.transition -> Toplevel.transition
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  val use_thy: string -> Toplevel.transition -> Toplevel.transition
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  val load: string -> Toplevel.transition -> Toplevel.transition
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  val print_theory: Toplevel.transition -> Toplevel.transition
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  val print_syntax: Toplevel.transition -> Toplevel.transition
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  val print_attributes: Toplevel.transition -> Toplevel.transition
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  val print_methods: Toplevel.transition -> Toplevel.transition
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  val print_binds: Toplevel.transition -> Toplevel.transition
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  val print_lthms: Toplevel.transition -> Toplevel.transition
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  val print_thms: xstring -> Toplevel.transition -> Toplevel.transition
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  val print_prop: string -> Toplevel.transition -> Toplevel.transition
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  val print_term: string -> Toplevel.transition -> Toplevel.transition
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  val print_type: string -> Toplevel.transition -> Toplevel.transition
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end;
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structure IsarCmd: ISAR_CMD =
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struct
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(* variations on exit *)
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val break = Toplevel.imperative (fn () => raise Toplevel.BREAK);
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val exit = Toplevel.keep (fn state =>
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  (Context.set_context (try Toplevel.theory_of state);
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    writeln "Leaving the Isar loop.  Invoke 'main_loop();' to restart.";
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    raise Toplevel.TERMINATE));
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val quit = Toplevel.imperative quit;
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(* use ML text *)
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fun use name = Toplevel.imperative (fn () => Use.use name);
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(*passes changes of theory context*)
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val use_mltext_theory = Toplevel.theory o IsarThy.use_mltext_theory;
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(*ignore result theory context*)
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fun use_mltext txt = Toplevel.keep (fn state =>
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  (IsarThy.use_mltext txt (try Toplevel.theory_of state); ()));
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(*Note: commit is dynamically bound*)
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val use_commit = use_mltext "commit();";
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(* current working directory *)
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fun print_cd _ = writeln (Library.pwd ());
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fun cd dir = Toplevel.imperative (fn () => (Use.cd dir; print_cd ()));
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val pwd = Toplevel.imperative print_cd;
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(* load theory files *)
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fun use_thy name = Toplevel.imperative (fn () => ThyRead.use_thy name);
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fun load name =
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  Toplevel.imperative (fn () => Toplevel.excursion (OuterSyntax.read_file (name ^ ".thy")));
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(* print theory contents *)
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val print_theory = Toplevel.keep (PureThy.print_theory o Toplevel.theory_of);
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val print_syntax = Toplevel.keep (Display.print_syntax o Toplevel.theory_of);
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val print_attributes = Toplevel.keep (Attrib.print_attributes o Toplevel.theory_of);
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val print_methods = Toplevel.keep (Method.print_methods o Toplevel.theory_of);
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(* print proof context contents *)
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val print_binds = Toplevel.keep (ProofContext.print_binds o Proof.context_of o Toplevel.proof_of);
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val print_lthms = Toplevel.keep (ProofContext.print_thms o Proof.context_of o Toplevel.proof_of);
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(* print theorems *)
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fun print_thms name = Toplevel.keep (fn state =>
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  let
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    val prt_tthm = Attribute.pretty_tthm;
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    fun prt_tthms [th] = prt_tthm th
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      | prt_tthms ths = Pretty.block (Pretty.fbreaks (map prt_tthm ths));
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    val tthms = map (apfst (Thm.transfer (Toplevel.theory_of state)))
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      (Toplevel.node_cases PureThy.get_tthms (ProofContext.get_tthms o Proof.context_of)
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        state name);
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  in Pretty.writeln (prt_tthms tthms) end);
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(* print types, terms and props *)
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fun read_typ thy = Sign.read_typ (Theory.sign_of thy, K None);
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fun read_term T thy s =
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  Thm.term_of (#1 (Thm.read_def_cterm (Theory.sign_of thy, K None, K None) [] true (s, T)));
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fun print_type s = Toplevel.keep (fn state =>
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  let
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    val sign = Toplevel.sign_of state;
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    val T = Toplevel.node_cases read_typ (ProofContext.read_typ o Proof.context_of) state s;
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  in Pretty.writeln (Pretty.quote (Sign.pretty_typ sign T)) end);
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fun print_term s = Toplevel.keep (fn state =>
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  let
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    val sign = Toplevel.sign_of state;
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    val t = Toplevel.node_cases (read_term (TVar (("'z", 0), logicS)))
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      (ProofContext.read_term o Proof.context_of) state s;
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    val T = Term.type_of t;
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  in
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    Pretty.writeln (Pretty.block [Pretty.quote (Sign.pretty_term sign t), Pretty.fbrk,
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      Pretty.str "::", Pretty.brk 1, Pretty.quote (Sign.pretty_typ sign T)])
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  end);
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fun print_prop s = Toplevel.keep (fn state =>
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  let
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    val sign = Toplevel.sign_of state;
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    val prop =
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      Toplevel.node_cases (read_term propT) (ProofContext.read_prop o Proof.context_of) state s;
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  in Pretty.writeln (Pretty.quote (Sign.pretty_term sign prop)) end);
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end;