(*  Title:      Pure/Isar/isar_cmd.ML

    ID:         $Id$

    Author:     Markus Wenzel, TU Muenchen

Derived Isar commands.

*)

signature ISAR_CMD =

sig

  val generic_setup: (string * Position.T) option -> theory -> theory

  val parse_ast_translation: bool * (string * Position.T) -> theory -> theory

  val parse_translation: bool * (string * Position.T) -> theory -> theory

  val print_translation: bool * (string * Position.T) -> theory -> theory

  val typed_print_translation: bool * (string * Position.T) -> theory -> theory

  val print_ast_translation: bool * (string * Position.T) -> theory -> theory

  val token_translation: string * Position.T -> theory -> theory

  val oracle: bstring -> string -> string * Position.T -> theory -> theory

  val add_axioms: ((bstring * string) * Attrib.src list) list -> theory -> theory

  val add_defs: (bool * bool) * ((bstring * string) * Attrib.src list) list -> theory -> theory

  val apply_theorems: (Facts.ref * Attrib.src list) list -> theory -> thm list * theory

  val apply_theorems_i: (thm list * attribute list) list -> theory -> thm list * theory

  val declaration: string * Position.T -> local_theory -> local_theory

  val simproc_setup: string -> string list -> string * Position.T -> string list ->

    local_theory -> local_theory

  val have: ((string * Attrib.src list) * (string * string list) list) list ->

    bool -> Proof.state -> Proof.state

  val hence: ((string * Attrib.src list) * (string * string list) list) list ->

    bool -> Proof.state -> Proof.state

  val show: ((string * Attrib.src list) * (string * string list) list) list ->

    bool -> Proof.state -> Proof.state

  val thus: ((string * Attrib.src list) * (string * string list) list) list ->

    bool -> Proof.state -> Proof.state

  val qed: Method.text option -> Toplevel.transition -> Toplevel.transition

  val terminal_proof: Method.text * Method.text option ->

    Toplevel.transition -> Toplevel.transition

  val default_proof: Toplevel.transition -> Toplevel.transition

  val immediate_proof: Toplevel.transition -> Toplevel.transition

  val done_proof: Toplevel.transition -> Toplevel.transition

  val skip_proof: Toplevel.transition -> Toplevel.transition

  val begin_theory: string -> string list -> (string * bool) list -> bool -> theory

  val end_theory: theory -> theory

  val kill_theory: string -> unit

  val theory: string * string list * (string * bool) list

    -> Toplevel.transition -> Toplevel.transition

  val welcome: Toplevel.transition -> Toplevel.transition

  val init_toplevel: Toplevel.transition -> Toplevel.transition

  val exit: Toplevel.transition -> Toplevel.transition

  val quit: Toplevel.transition -> Toplevel.transition

  val touch_child_thys: string -> Toplevel.transition -> Toplevel.transition

  val touch_thy: string -> Toplevel.transition -> Toplevel.transition

  val remove_thy: string -> Toplevel.transition -> Toplevel.transition

  val kill_thy: string -> Toplevel.transition -> Toplevel.transition

  val pr: string list * (int option * int option) -> Toplevel.transition -> Toplevel.transition

  val disable_pr: Toplevel.transition -> Toplevel.transition

  val enable_pr: Toplevel.transition -> Toplevel.transition

  val redo: Toplevel.transition -> Toplevel.transition

  val undos_proof: int -> Toplevel.transition -> Toplevel.transition

  val kill_proof_notify: (unit -> unit) -> Toplevel.transition -> Toplevel.transition

  val kill_proof: Toplevel.transition -> Toplevel.transition

  val undo_theory: Toplevel.transition -> Toplevel.transition

  val undo: Toplevel.transition -> Toplevel.transition

  val cannot_undo: string -> Toplevel.transition -> Toplevel.transition

  val kill: Toplevel.transition -> Toplevel.transition

  val back: Toplevel.transition -> Toplevel.transition

  val use: Path.T -> Toplevel.transition -> Toplevel.transition

  val use_mltext_theory: string * Position.T -> Toplevel.transition -> Toplevel.transition

  val use_mltext: bool -> string * Position.T -> Toplevel.transition -> Toplevel.transition

  val use_commit: Toplevel.transition -> Toplevel.transition

  val nested_command: Markup.property list -> string * Position.T -> Toplevel.transition

  val cd: Path.T -> Toplevel.transition -> Toplevel.transition

  val pwd: Toplevel.transition -> Toplevel.transition

  val use_thy: string -> Toplevel.transition -> Toplevel.transition

  val display_drafts: Path.T list -> Toplevel.transition -> Toplevel.transition

  val print_drafts: Path.T list -> Toplevel.transition -> Toplevel.transition

  val pretty_setmargin: int -> Toplevel.transition -> Toplevel.transition

  val print_context: Toplevel.transition -> Toplevel.transition

  val print_theory: bool -> Toplevel.transition -> Toplevel.transition

  val print_syntax: Toplevel.transition -> Toplevel.transition

  val print_abbrevs: Toplevel.transition -> Toplevel.transition

  val print_facts: Toplevel.transition -> Toplevel.transition

  val print_configs: Toplevel.transition -> Toplevel.transition

  val print_theorems: Toplevel.transition -> Toplevel.transition

  val print_locales: Toplevel.transition -> Toplevel.transition

  val print_locale: bool * (Locale.expr * Element.context list)

    -> Toplevel.transition -> Toplevel.transition

  val print_registrations: bool -> string -> Toplevel.transition -> Toplevel.transition

  val print_attributes: Toplevel.transition -> Toplevel.transition

  val print_simpset: Toplevel.transition -> Toplevel.transition

  val print_rules: Toplevel.transition -> Toplevel.transition

  val print_trans_rules: Toplevel.transition -> Toplevel.transition

  val print_methods: Toplevel.transition -> Toplevel.transition

  val print_antiquotations: Toplevel.transition -> Toplevel.transition

  val class_deps: Toplevel.transition -> Toplevel.transition

  val thy_deps: Toplevel.transition -> Toplevel.transition

  val thm_deps: (Facts.ref * Attrib.src list) list -> Toplevel.transition -> Toplevel.transition

  val find_theorems: (int option * bool) * (bool * string FindTheorems.criterion) list

    -> Toplevel.transition -> Toplevel.transition

  val unused_thms: (string list * string list option) option ->

    Toplevel.transition -> Toplevel.transition

  val print_binds: Toplevel.transition -> Toplevel.transition

  val print_cases: Toplevel.transition -> Toplevel.transition

  val print_stmts: string list * (Facts.ref * Attrib.src list) list

    -> Toplevel.transition -> Toplevel.transition

  val print_thms: string list * (Facts.ref * Attrib.src list) list

    -> Toplevel.transition -> Toplevel.transition

  val print_prfs: bool -> string list * (Facts.ref * Attrib.src list) list option

    -> Toplevel.transition -> Toplevel.transition

  val print_prop: (string list * string) -> Toplevel.transition -> Toplevel.transition

  val print_term: (string list * string) -> Toplevel.transition -> Toplevel.transition

  val print_type: (string list * string) -> Toplevel.transition -> Toplevel.transition

  val add_header: string * Position.T -> Toplevel.transition -> Toplevel.transition

  val add_chapter: xstring option * (string * Position.T) ->

    Toplevel.transition -> Toplevel.transition

  val add_section: xstring option * (string * Position.T) ->

    Toplevel.transition -> Toplevel.transition

  val add_subsection: xstring option * (string * Position.T) ->

    Toplevel.transition -> Toplevel.transition

  val add_subsubsection: xstring option * (string * Position.T) ->

    Toplevel.transition -> Toplevel.transition

  val add_text: xstring option * (string * Position.T) ->

    Toplevel.transition -> Toplevel.transition

  val add_text_raw: string * Position.T -> Toplevel.transition -> Toplevel.transition

  val add_sect: string * Position.T -> Toplevel.transition -> Toplevel.transition

  val add_subsect: string * Position.T -> Toplevel.transition -> Toplevel.transition

  val add_subsubsect: string * Position.T -> Toplevel.transition -> Toplevel.transition

  val add_txt: string * Position.T -> Toplevel.transition -> Toplevel.transition

  val add_txt_raw: string * Position.T -> Toplevel.transition -> Toplevel.transition

end;

structure IsarCmd: ISAR_CMD =

struct

(** theory declarations **)

(* generic_setup *)

fun generic_setup NONE = (fn thy => thy |> Context.setup ())

  | generic_setup (SOME (txt, pos)) =

      ML_Context.use_let pos "val setup: theory -> theory" "Context.map_theory setup" txt

      |> Context.theory_map;

(* translation functions *)

local

fun advancedT false = ""

  | advancedT true = "Proof.context -> ";

fun advancedN false = ""

  | advancedN true = "advanced_";

in

fun parse_ast_translation (a, (txt, pos)) =

  txt |> ML_Context.use_let pos ("val parse_ast_translation: (string * (" ^ advancedT a ^

      "Syntax.ast list -> Syntax.ast)) list")

    ("Context.map_theory (Sign.add_" ^ advancedN a ^ "trfuns (parse_ast_translation, [], [], []))")

  |> Context.theory_map;

fun parse_translation (a, (txt, pos)) =

  txt |> ML_Context.use_let pos ("val parse_translation: (string * (" ^ advancedT a ^

      "term list -> term)) list")

    ("Context.map_theory (Sign.add_" ^ advancedN a ^ "trfuns ([], parse_translation, [], []))")

  |> Context.theory_map;

fun print_translation (a, (txt, pos)) =

  txt |> ML_Context.use_let pos ("val print_translation: (string * (" ^ advancedT a ^

      "term list -> term)) list")

    ("Context.map_theory (Sign.add_" ^ advancedN a ^ "trfuns ([], [], print_translation, []))")

  |> Context.theory_map;

fun print_ast_translation (a, (txt, pos)) =

  txt |> ML_Context.use_let pos ("val print_ast_translation: (string * (" ^ advancedT a ^

      "Syntax.ast list -> Syntax.ast)) list")

    ("Context.map_theory (Sign.add_" ^ advancedN a ^ "trfuns ([], [], [], print_ast_translation))")

  |> Context.theory_map;

fun typed_print_translation (a, (txt, pos)) =

  txt |> ML_Context.use_let pos ("val typed_print_translation: (string * (" ^ advancedT a ^

      "bool -> typ -> term list -> term)) list")

    ("Context.map_theory (Sign.add_" ^ advancedN a ^ "trfunsT typed_print_translation)")

  |> Context.theory_map;

fun token_translation (txt, pos) =

  txt |> ML_Context.use_let pos

    "val token_translation: (string * string * (string -> output * int)) list"

      "Context.map_theory (Sign.add_tokentrfuns token_translation)"

  |> Context.theory_map;

end;

(* oracles *)

fun oracle name typ (oracle, pos) =

  let val txt =

    "local\

    \  type T = " ^ typ ^ ";\

    \  val oracle: theory -> T -> term = " ^ oracle ^ ";\n\

    \  val name = " ^ quote name ^ ";\n\

    \  exception Arg of T;\n\

    \  val _ = ML_Context.>> (Theory.add_oracle (name, fn (thy, Arg x) => oracle thy x));\n\

    \  val thy = ML_Context.the_context ();\n\

    \  val invoke_" ^ name ^ " = Thm.invoke_oracle_i thy (Sign.full_name thy name);\n\

    \in\n\

    \  fun " ^ name ^ " thy x = invoke_" ^ name ^ " (thy, Arg x);\n\

    \end;\n";

  in ML_Context.use_mltext_update false pos txt end

  |> Context.theory_map;

(* axioms *)

fun add_axms f args thy =

  f (map (fn (x, srcs) => (x, map (Attrib.attribute thy) srcs)) args) thy;

val add_axioms = add_axms (snd oo PureThy.add_axioms);

fun add_defs ((unchecked, overloaded), args) =

  add_axms

    (snd oo (if unchecked then PureThy.add_defs_unchecked else PureThy.add_defs) overloaded) args;

(* facts *)

fun apply_theorems args thy =

  let val facts = Attrib.map_facts (Attrib.attribute thy) [(("", []), args)]

  in apfst (maps snd) (PureThy.note_thmss "" facts thy) end;

fun apply_theorems_i args = apfst (maps snd) o PureThy.note_thmss_i "" [(("", []), args)];

(* declarations *)

fun declaration (txt, pos) =

  txt |> ML_Context.use_let pos "val declaration: Morphism.declaration"

    "Context.map_proof (LocalTheory.declaration declaration)"

  |> Context.proof_map;

(* simprocs *)

fun simproc_setup name lhss (proc, pos) identifier =

  ML_Context.use_let pos

    "val proc: Morphism.morphism -> Simplifier.simpset -> cterm -> thm option"

  ("Context.map_proof (Simplifier.def_simproc {name = " ^ ML_Syntax.print_string name ^ ", \

    \lhss = " ^ ML_Syntax.print_strings lhss ^ ", proc = proc, \

    \identifier = Library.maps ML_Context.thms " ^ ML_Syntax.print_strings identifier ^ "})") proc

  |> Context.proof_map;

(* goals *)

fun goal opt_chain goal stmt int =

  opt_chain #> goal NONE (K Seq.single) stmt int;

val have = goal I Proof.have;

val hence = goal Proof.chain Proof.have;

val show = goal I Proof.show;

val thus = goal Proof.chain Proof.show;

(* local endings *)

fun local_qed m = Toplevel.proofs (Proof.local_qed (m, true));

val local_terminal_proof = Toplevel.proofs o Proof.local_terminal_proof;

val local_default_proof = Toplevel.proofs Proof.local_default_proof;

val local_immediate_proof = Toplevel.proofs Proof.local_immediate_proof;

val local_done_proof = Toplevel.proofs Proof.local_done_proof;

val local_skip_proof = Toplevel.proofs' Proof.local_skip_proof;

val skip_local_qed =

  Toplevel.skip_proof (History.apply (fn i => if i > 1 then i - 1 else raise Toplevel.UNDEF));

(* global endings *)

fun global_qed m = Toplevel.end_proof (K (Proof.global_qed (m, true)));

val global_terminal_proof = Toplevel.end_proof o K o Proof.global_terminal_proof;

val global_default_proof = Toplevel.end_proof (K Proof.global_default_proof);

val global_immediate_proof = Toplevel.end_proof (K Proof.global_immediate_proof);

val global_skip_proof = Toplevel.end_proof Proof.global_skip_proof;

val global_done_proof = Toplevel.end_proof (K Proof.global_done_proof);

val skip_global_qed = Toplevel.skip_proof_to_theory (equal 1);

(* common endings *)

fun qed m = local_qed m o global_qed m o skip_local_qed o skip_global_qed;

fun terminal_proof m = local_terminal_proof m o global_terminal_proof m;

val default_proof = local_default_proof o global_default_proof;

val immediate_proof = local_immediate_proof o global_immediate_proof;

val done_proof = local_done_proof o global_done_proof;

val skip_proof = local_skip_proof o global_skip_proof;

(* init and exit *)

fun begin_theory name imports uses =

  ThyInfo.begin_theory name imports (map (apfst Path.explode) uses);

fun end_theory thy =

  if ThyInfo.check_known_thy (Context.theory_name thy) then ThyInfo.end_theory thy else thy;

val kill_theory = ThyInfo.if_known_thy ThyInfo.remove_thy;

fun theory (name, imports, uses) =

  Toplevel.init_theory (begin_theory name imports uses)

    (fn thy => (end_theory thy; ()))

    (kill_theory o Context.theory_name);

val init_toplevel = Toplevel.imperative (fn () => raise Toplevel.RESTART);

val welcome = Toplevel.imperative (writeln o Session.welcome);

val exit = Toplevel.keep (fn state =>

 (CRITICAL (fn () => ML_Context.set_context (try Toplevel.generic_theory_of state));

  raise Toplevel.TERMINATE));

val quit = Toplevel.imperative quit;

(* touch theories *)

fun touch_child_thys name = Toplevel.imperative (fn () => ThyInfo.touch_child_thys name);

fun touch_thy name = Toplevel.imperative (fn () => ThyInfo.touch_thy name);

fun remove_thy name = Toplevel.imperative (fn () => ThyInfo.remove_thy name);

fun kill_thy name = Toplevel.imperative (fn () => kill_theory name);

(* print state *)

fun set_limit _ NONE = ()

  | set_limit r (SOME n) = r := n;

fun pr (modes, (lim1, lim2)) = Toplevel.keep (fn state =>

  (set_limit goals_limit lim1; set_limit ProofContext.prems_limit lim2; Toplevel.quiet := false;

    PrintMode.with_modes modes (Toplevel.print_state true) state));

val disable_pr = Toplevel.imperative (fn () => Toplevel.quiet := true);

val enable_pr = Toplevel.imperative (fn () => Toplevel.quiet := false);

(* history commands *)

val redo =

  Toplevel.history History.redo o

  Toplevel.actual_proof ProofHistory.redo o

  Toplevel.skip_proof History.redo;

fun undos_proof n =

  Toplevel.actual_proof (fn prf =>

    if ProofHistory.is_initial prf then raise Toplevel.UNDEF else funpow n ProofHistory.undo prf) o

  Toplevel.skip_proof (fn h =>

    if History.is_initial h then raise Toplevel.UNDEF else funpow n History.undo h);

fun kill_proof_notify (f: unit -> unit) = Toplevel.history (fn hist =>

  if is_some (Toplevel.theory_node (History.current hist)) then raise Toplevel.UNDEF

  else (f (); History.undo hist));

val kill_proof = kill_proof_notify (K ());

val undo_theory = Toplevel.history (fn hist =>

  if History.is_initial hist then raise Toplevel.UNDEF else History.undo hist);

val undo = Toplevel.kill o undo_theory o Toplevel.undo_exit o undos_proof 1;

fun cannot_undo "end" = undo   (*ProofGeneral legacy*)

  | cannot_undo txt = Toplevel.imperative (fn () => error ("Cannot undo " ^ quote txt));

val kill = Toplevel.kill o kill_proof;

val back =

  Toplevel.actual_proof ProofHistory.back o

  Toplevel.skip_proof (History.apply I);

(* use ML text *)

fun use path = Toplevel.keep (fn state =>

  ML_Context.setmp (try Toplevel.generic_theory_of state) (ThyInfo.load_file false) path);

(*passes changes of theory context*)

fun use_mltext_theory (txt, pos) =

  Toplevel.theory' (fn int => Context.theory_map (ML_Context.use_mltext_update int pos txt));

(*ignore result theory context*)

fun use_mltext verbose (txt, pos) = Toplevel.keep' (fn int => fn state =>

  (ML_Context.use_mltext (verbose andalso int) pos txt (try Toplevel.generic_theory_of state)));

val use_commit = Toplevel.imperative Secure.commit;

(* nested commands *)

fun nested_command props (str, pos) =

  let val pos' = Position.of_properties (props |> Position.default_properties pos) in

    (case OuterSyntax.parse pos' str of

      [transition] => transition

    | _ => error "exactly one command expected")

  end;

(* current working directory *)

fun cd path = Toplevel.imperative (fn () => (File.cd path));

val pwd = Toplevel.imperative (fn () => writeln (Path.implode (File.pwd ())));

(* load theory files *)

fun use_thy name = Toplevel.imperative (fn () => ML_Context.save ThyInfo.use_thy name);

(* present draft files *)

fun display_drafts files = Toplevel.imperative (fn () =>

  let val outfile = File.shell_path (Present.drafts (getenv "ISABELLE_DOC_FORMAT") files)

  in File.isatool ("display -c " ^ outfile ^ " &"); () end);

fun print_drafts files = Toplevel.imperative (fn () =>

  let val outfile = File.shell_path (Present.drafts "ps" files)

  in File.isatool ("print -c " ^ outfile); () end);

(* pretty_setmargin *)

fun pretty_setmargin n = Toplevel.imperative (fn () => Pretty.setmargin n);

(* print parts of theory and proof context *)

val print_context = Toplevel.keep Toplevel.print_state_context;

fun print_theory verbose = Toplevel.unknown_theory o

  Toplevel.keep (Pretty.writeln o ProofDisplay.pretty_full_theory verbose o Toplevel.theory_of);

val print_syntax = Toplevel.unknown_context o

  Toplevel.keep (ProofContext.print_syntax o Toplevel.context_of);

val print_abbrevs = Toplevel.unknown_context o

  Toplevel.keep (ProofContext.print_abbrevs o Toplevel.context_of);

val print_facts = Toplevel.unknown_context o Toplevel.keep (fn state =>

  ProofContext.setmp_verbose

    ProofContext.print_lthms (Toplevel.context_of state));

val print_configs = Toplevel.unknown_context o Toplevel.keep (fn state =>

  Attrib.print_configs (Toplevel.context_of state));

val print_theorems_proof = Toplevel.keep (fn state =>

  ProofContext.setmp_verbose

    ProofContext.print_lthms (Proof.context_of (Toplevel.proof_of state)));

val print_theorems_theory = Toplevel.keep (fn state =>

  Toplevel.theory_of state |>

  (case Option.map Toplevel.theory_node (History.previous (Toplevel.node_history_of state)) of

    SOME (SOME prev_thy) => ProofDisplay.print_theorems_diff (Context.theory_of prev_thy)

  | _ => ProofDisplay.print_theorems));

val print_theorems = Toplevel.unknown_context o print_theorems_theory o print_theorems_proof;

val print_locales = Toplevel.unknown_theory o

  Toplevel.keep (Locale.print_locales o Toplevel.theory_of);

fun print_locale (show_facts, (imports, body)) = Toplevel.unknown_theory o

  Toplevel.keep (fn state =>

    Locale.print_locale (Toplevel.theory_of state) show_facts imports body);

fun print_registrations show_wits name = Toplevel.unknown_context o

  Toplevel.keep (Toplevel.node_case

      (Context.cases (Locale.print_registrations show_wits name o ProofContext.init)

        (Locale.print_registrations show_wits name))

    (Locale.print_registrations show_wits name o Proof.context_of));

val print_attributes = Toplevel.unknown_theory o

  Toplevel.keep (Attrib.print_attributes o Toplevel.theory_of);

val print_simpset = Toplevel.unknown_context o

  Toplevel.keep (Toplevel.node_case

    (Context.cases Simplifier.print_simpset Simplifier.print_local_simpset)

    (Simplifier.print_local_simpset o Proof.context_of));

val print_rules = Toplevel.unknown_context o

  Toplevel.keep (ContextRules.print_rules o Toplevel.context_of);

val print_trans_rules = Toplevel.unknown_context o

  Toplevel.keep (Calculation.print_rules o Toplevel.context_of);

val print_methods = Toplevel.unknown_theory o

  Toplevel.keep (Method.print_methods o Toplevel.theory_of);

val print_antiquotations = Toplevel.imperative ThyOutput.print_antiquotations;

val thy_deps = Toplevel.unknown_theory o Toplevel.keep (fn state =>

  let

    val thy = Toplevel.theory_of state;

    val all_thys = sort ThyInfo.thy_ord (thy :: Theory.ancestors_of thy);

    val gr = all_thys |> map (fn node =>

      let

        val name = Context.theory_name node;

        val parents = map Context.theory_name (Theory.parents_of node);

        val dir = Present.session_name node;

        val unfold = not (ThyInfo.known_thy name andalso ThyInfo.is_finished name);

      in {name = name, ID = name, parents = parents, dir = dir, unfold = unfold, path = ""} end);

  in Present.display_graph gr end);

val class_deps = Toplevel.unknown_theory o Toplevel.keep (fn state =>

  let

    val thy = Toplevel.theory_of state;

    val {classes = (space, algebra), ...} = Type.rep_tsig (Sign.tsig_of thy);

    val {classes, ...} = Sorts.rep_algebra algebra;

    fun entry (c, (i, (_, cs))) =

      (i, {name = NameSpace.extern space c, ID = c, parents = cs,

            dir = "", unfold = true, path = ""});

    val gr =

      Graph.fold (cons o entry) classes []

      |> sort (int_ord o pairself #1) |> map #2;

  in Present.display_graph gr end);

(* retrieve theorems *)

fun thm_deps args = Toplevel.unknown_theory o Toplevel.keep (fn state =>

  ThmDeps.thm_deps (Proof.get_thmss (Toplevel.enter_proof_body state) args));

fun find_theorems ((opt_lim, rem_dups), spec) =

  Toplevel.unknown_theory o Toplevel.keep (fn state =>

  let

    val proof_state = Toplevel.enter_proof_body state;

    val ctxt = Proof.context_of proof_state;

    val opt_goal = try Proof.get_goal proof_state |> Option.map (Thm.prop_of o #2 o #2);

  in FindTheorems.print_theorems ctxt opt_goal opt_lim rem_dups spec end);

(* find unused theorems *)

fun unused_thms opt_range = Toplevel.keep (fn state =>

  let

    val thy = Toplevel.theory_of state;

    val ctxt = Toplevel.context_of state;

    fun pretty_thm (a, th) = ProofContext.pretty_fact ctxt (a, [th]);

  in

    ThmDeps.unused_thms

      (case opt_range of

         NONE => (NONE, [thy])

       | SOME (xs, NONE) => (SOME (map ThyInfo.get_theory xs), [thy])

       | SOME (xs, SOME ys) => (SOME (map ThyInfo.get_theory xs), map ThyInfo.get_theory ys))

    |> map pretty_thm |> Pretty.chunks |> Pretty.writeln

  end);

(* print proof context contents *)

val print_binds = Toplevel.unknown_context o Toplevel.keep (fn state =>

  ProofContext.setmp_verbose ProofContext.print_binds (Toplevel.context_of state));

val print_cases = Toplevel.unknown_context o Toplevel.keep (fn state =>

  ProofContext.setmp_verbose ProofContext.print_cases (Toplevel.context_of state));

(* print theorems, terms, types etc. *)

local

fun string_of_stmts state args =

  Proof.get_thmss state args

  |> map (Element.pretty_statement (Proof.context_of state) Thm.theoremK)

  |> Pretty.chunks2 |> Pretty.string_of;

fun string_of_thms state args =

  Pretty.string_of (ProofContext.pretty_thms (Proof.context_of state)

    (Proof.get_thmss state args));

fun string_of_prfs full state arg =

  Pretty.string_of (case arg of

      NONE =>

        let

          val (ctxt, (_, thm)) = Proof.get_goal state;

          val {thy, der = (_, prf), ...} = Thm.rep_thm thm;

          val prop = Thm.full_prop_of thm;

          val prf' = Proofterm.rewrite_proof_notypes ([], []) prf

        in

          ProofContext.pretty_proof ctxt

            (if full then Reconstruct.reconstruct_proof thy prop prf' else prf')

        end

    | SOME args => Pretty.chunks

        (map (ProofContext.pretty_proof_of (Proof.context_of state) full)

          (Proof.get_thmss state args)));

fun string_of_prop state s =

  let

    val ctxt = Proof.context_of state;

    val prop = Syntax.read_prop ctxt s;

  in Pretty.string_of (Pretty.quote (Syntax.pretty_term ctxt prop)) end;

fun string_of_term state s =

  let

    val ctxt = Proof.context_of state;

    val t = Syntax.read_term ctxt s;

    val T = Term.type_of t;

  in

    Pretty.string_of

      (Pretty.block [Pretty.quote (Syntax.pretty_term ctxt t), Pretty.fbrk,

        Pretty.str "::", Pretty.brk 1, Pretty.quote (Syntax.pretty_typ ctxt T)])

  end;

fun string_of_type state s =

  let

    val ctxt = Proof.context_of state;

    val T = Syntax.read_typ ctxt s;

  in Pretty.string_of (Pretty.quote (Syntax.pretty_typ ctxt T)) end;

fun print_item string_of (modes, arg) = Toplevel.keep (fn state =>

  PrintMode.with_modes modes (fn () =>

    writeln (string_of (Toplevel.enter_proof_body state) arg)) ());

in

val print_stmts = print_item string_of_stmts;

val print_thms = print_item string_of_thms;

val print_prfs = print_item o string_of_prfs;

val print_prop = print_item string_of_prop;

val print_term = print_item string_of_term;

val print_type = print_item string_of_type;

end;

(* markup commands *)

fun add_header s = Toplevel.keep' (fn int => fn state =>

  (if Toplevel.is_toplevel state then () else raise Toplevel.UNDEF;

   if int then OuterSyntax.check_text s NONE else ()));

local

fun present _ txt true node = OuterSyntax.check_text txt (SOME node)

  | present f (s, _) false node =

      ML_Context.setmp (try (Toplevel.cases_node I (Context.Proof o Proof.context_of)) node) f s;

fun present_local_theory f (loc, txt) = Toplevel.present_local_theory loc (present f txt);

fun present_proof f txt = Toplevel.print o Toplevel.present_proof (present f txt);

in

val add_chapter       = present_local_theory Present.section;

val add_section       = present_local_theory Present.section;

val add_subsection    = present_local_theory Present.subsection;

val add_subsubsection = present_local_theory Present.subsubsection;

val add_text          = present_local_theory (K ());

fun add_text_raw txt  = present_local_theory (K ()) (NONE, txt);

val add_txt           = present_proof (K ());

val add_txt_raw       = add_txt;

val add_sect          = add_txt;

val add_subsect       = add_txt;

val add_subsubsect    = add_txt;

end;

end;