src/Pure/Isar/isar_thy.ML
author wenzelm
Fri Feb 05 21:04:58 1999 +0100 (1999-02-05)
changeset 6246 0aa2e536bc20
parent 6198 7fa2deb92b39
child 6253 dbaf79ac2ff9
permissions -rw-r--r--
improved theory, context, update_context;
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(*  Title:      Pure/Isar/isar_thy.ML
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    ID:         $Id$
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    Author:     Markus Wenzel, TU Muenchen
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Derived theory operations.
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TODO:
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  - pure_thy.ML: add_constdefs (atomic!);
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  - 'methods' section (proof macros, ML method defs) (!?);
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  - next_block: ProofHistory open / close (!?);
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*)
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signature ISAR_THY =
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sig
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  val add_text: string -> theory -> theory
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  val add_chapter: string -> theory -> theory
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  val add_section: string -> theory -> theory
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  val add_subsection: string -> theory -> theory
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  val add_subsubsection: string -> theory -> theory
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  val add_axioms: ((bstring * string) * Args.src list) list -> theory -> theory
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  val add_defs: ((bstring * string) * Args.src list) list -> theory -> theory
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  val have_theorems: (bstring * Args.src list) * (xstring * Args.src list) list
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    -> theory -> theory
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  val have_lemmas: (bstring * Args.src list) * (xstring * Args.src list) list
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    -> theory -> theory
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  val have_facts: (string * Args.src list) * (string * Args.src list) list
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    -> ProofHistory.T -> ProofHistory.T
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  val fix: (string * string option) list -> ProofHistory.T -> ProofHistory.T
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  val match_bind: (string list * string) list -> ProofHistory.T -> ProofHistory.T
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  val theorem: string -> Args.src list -> string * string list -> theory -> ProofHistory.T
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  val lemma: string -> Args.src list -> string * string list -> theory -> ProofHistory.T
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  val assume: string -> Args.src list -> (string * string list) list
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    -> ProofHistory.T -> ProofHistory.T
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  val show: string -> Args.src list -> string * string list -> ProofHistory.T -> ProofHistory.T
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  val have: string -> Args.src list -> string * string list -> ProofHistory.T -> ProofHistory.T
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  val chain: ProofHistory.T -> ProofHistory.T
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  val from_facts: (string * Args.src list) list -> ProofHistory.T -> ProofHistory.T
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  val begin_block: ProofHistory.T -> ProofHistory.T
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  val next_block: ProofHistory.T -> ProofHistory.T
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  val end_block: ProofHistory.T -> ProofHistory.T
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  val qed_with: bstring option * Args.src list option -> ProofHistory.T -> theory
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  val qed: ProofHistory.T -> theory
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  val kill_proof: ProofHistory.T -> theory
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  val tac: Method.text -> ProofHistory.T -> ProofHistory.T
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  val then_tac: Method.text -> ProofHistory.T -> ProofHistory.T
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  val proof: Method.text option -> ProofHistory.T -> ProofHistory.T
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  val terminal_proof: Method.text -> ProofHistory.T -> ProofHistory.T
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  val immediate_proof: ProofHistory.T -> ProofHistory.T
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  val default_proof: ProofHistory.T -> ProofHistory.T
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  val use_mltext: string -> theory option -> theory option
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  val use_mltext_theory: string -> theory -> theory
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  val use_setup: string -> theory -> theory
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  val parse_ast_translation: string -> theory -> theory
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  val parse_translation: string -> theory -> theory
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  val print_translation: string -> theory -> theory
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  val typed_print_translation: string -> theory -> theory
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  val print_ast_translation: string -> theory -> theory
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  val token_translation: string -> theory -> theory
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  val add_oracle: bstring * string -> theory -> theory
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  val theory: string * string list * (string * bool) list
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    -> Toplevel.transition -> Toplevel.transition
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  val context: string -> Toplevel.transition -> Toplevel.transition
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  val update_context: string -> Toplevel.transition -> Toplevel.transition
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end;
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structure IsarThy: ISAR_THY =
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struct
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(** derived theory and proof operations **)
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(* formal comments *)	(* FIXME dummy *)
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fun add_text (txt:string) (thy:theory) = thy;
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val add_chapter = add_text;
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val add_section = add_text;
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val add_subsection = add_text;
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val add_subsubsection = add_text;
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(* axioms and defs *)
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fun add_axms f args thy =
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  f (map (fn (x, srcs) => (x, map (Attrib.global_attribute thy) srcs)) args) thy;
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val add_axioms = add_axms PureThy.add_axioms;
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val add_defs = add_axms PureThy.add_defs;
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(* theorems *)
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fun gen_have_thmss get attrib f ((name, more_srcs), th_srcs) x =
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  f name (map (attrib x) more_srcs)
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    (map (fn (s, srcs) => (get x s, map (attrib x) srcs)) th_srcs) x;
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val have_theorems =
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  #1 oo gen_have_thmss PureThy.get_thms Attrib.global_attribute PureThy.have_thmss;
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val have_lemmas =
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  #1 oo gen_have_thmss PureThy.get_thms Attrib.global_attribute
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    (fn name => fn more_atts => PureThy.have_thmss name (more_atts @ [Drule.tag_lemma]));
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val have_thmss =
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  gen_have_thmss (ProofContext.get_thms o Proof.context_of)
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    (Attrib.local_attribute o Proof.theory_of) Proof.have_thmss;
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val have_facts = ProofHistory.apply o have_thmss;
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val from_facts = ProofHistory.apply o (Proof.chain oo curry have_thmss ("", []));
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(* context *)
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val fix = ProofHistory.apply o Proof.fix;
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val match_bind = ProofHistory.apply o Proof.match_bind;
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(* statements *)
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fun global_statement f name tags s thy =
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  ProofHistory.init (f name (map (Attrib.global_attribute thy) tags) s thy);
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fun local_statement f name tags s = ProofHistory.apply_open (fn state =>
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  f name (map (Attrib.local_attribute (Proof.theory_of state)) tags) s state);
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val theorem = global_statement Proof.theorem;
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val lemma = global_statement Proof.lemma;
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val assume = local_statement Proof.assume;
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val show = local_statement Proof.show;
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val have = local_statement Proof.have;
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(* forward chaining *)
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val chain = ProofHistory.apply Proof.chain;
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(* end proof *)
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fun qed_with (alt_name, alt_tags) prf =
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  let
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    val state = ProofHistory.current prf;
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    val thy = Proof.theory_of state;
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    val alt_atts = apsome (map (Attrib.global_attribute thy)) alt_tags;
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    val (thy', (kind, name, thm)) = Method.qed alt_name alt_atts state;
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    val prt_result = Pretty.block
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      [Pretty.str (kind ^ " " ^ name ^ ":"), Pretty.fbrk, Display.pretty_thm thm];
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  in Pretty.writeln prt_result; thy end;
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val qed = qed_with (None, None);
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val kill_proof = Proof.theory_of o ProofHistory.current;
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(* blocks *)
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val begin_block = ProofHistory.apply_open Proof.begin_block;
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val next_block = ProofHistory.apply Proof.next_block;
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(* backward steps *)
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val tac = ProofHistory.applys o Method.tac;
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val then_tac = ProofHistory.applys o Method.then_tac;
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val proof = ProofHistory.applys o Method.proof;
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val end_block = ProofHistory.applys_close Method.end_block;
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val terminal_proof = ProofHistory.applys_close o Method.terminal_proof;
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val immediate_proof = ProofHistory.applys_close Method.immediate_proof;
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val default_proof = ProofHistory.applys_close Method.default_proof;
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(* use ML text *)
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fun use_mltext txt opt_thy =
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  let
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    val save_context = Context.get_context ();
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    val _ = Context.set_context opt_thy;
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    val opt_exn = (transform_error (use_text false) txt; None) handle exn => Some exn;
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    val opt_thy' = Context.get_context ();
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  in
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    Context.set_context save_context;
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    (case opt_exn of
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      None => opt_thy'
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    | Some exn => raise exn)
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  end;
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fun use_mltext_theory txt thy =
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  (case use_mltext txt (Some thy) of
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    Some thy' => thy'
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  | None => error "Missing result ML theory context");
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fun use_context txt = use_mltext_theory ("Context.>> (" ^ txt ^ ");");
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fun use_let name body txt =
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  use_context ("let val " ^ name ^ " = " ^ txt ^ " in\n" ^ body ^ " end");
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val use_setup =
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  use_let "setup: (theory -> theory) list" "Library.apply setup";
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(* translation functions *)
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val parse_ast_translation =
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  use_let "parse_ast_translation: (string * (Syntax.ast list -> Syntax.ast)) list"
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    "Theory.add_trfuns (parse_ast_translation, [], [], [])";
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val parse_translation =
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  use_let "parse_translation: (string * (term list -> term)) list"
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    "Theory.add_trfuns ([], parse_translation, [], [])";
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val print_translation =
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  use_let "print_translation: (string * (term list -> term)) list"
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    "Theory.add_trfuns ([], [], print_translation, [])";
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val print_ast_translation =
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  use_let "print_ast_translation: (string * (Syntax.ast list -> Syntax.ast)) list"
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    "Theory.add_trfuns ([], [], [], print_ast_translation)";
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val typed_print_translation =
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  use_let "typed_print_translation: (string * (bool -> typ -> term list -> term)) list"
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    "Theory.add_trfunsT typed_print_translation";
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val token_translation =
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  use_let "token_translation: (string * string * (string -> string * int)) list"
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    "Theory.add_tokentrfuns token_translation";
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(* add_oracle *)
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fun add_oracle (name, txt) =
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  use_let
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    "oracle: bstring * (Sign.sg * Object.T -> term)"
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    "Theory.add_oracle oracle"
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    ("(" ^ quote name ^ ", " ^ txt ^ ")");
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(* theory init and exit *)
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fun begin_theory (name, parents, files) () =
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  let val thy = ThyInfo.begin_theory name parents
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  in seq ThyInfo.use (mapfilter (fn (x, true) => Some x | _ => None) files); thy end;
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fun end_theory thy =
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  let val thy' = PureThy.end_theory thy in
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    transform_error ThyInfo.put_theory thy'
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      handle exn => raise PureThy.ROLLBACK (thy', Some exn)     (* FIXME !!?? *)
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  end;
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fun theory spec = Toplevel.init_theory (begin_theory spec) end_theory;
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(* context switch *)
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fun switch_theory require name =
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  Toplevel.init_theory
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    (fn () => (Context.save require name; ThyInfo.get_theory name)) (K ());
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val context = switch_theory ThyInfo.use_thy;
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val update_context = switch_theory ThyInfo.update_thy;
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end;