src/Pure/PIDE/resources.ML
author wenzelm
Fri, 12 Aug 2016 14:19:27 +0200
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permissions -rw-r--r--
uniform ML and document antiquotations;
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(*  Title:      Pure/PIDE/resources.ML
42002
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    Author:     Makarius
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Resources for theories and auxiliary files.
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*)
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signature RESOURCES =
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sig
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  val master_directory: theory -> Path.T
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  val imports_of: theory -> (string * Position.T) list
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  val thy_path: Path.T -> Path.T
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  val check_thy: Path.T -> string ->
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   {master: Path.T * SHA1.digest, text: string, theory_pos: Position.T,
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    imports: (string * Position.T) list, keywords: Thy_Header.keywords}
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  val parse_files: string -> (theory -> Token.file list) parser
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  val provide: Path.T * SHA1.digest -> theory -> theory
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  val provide_parse_files: string -> (theory -> Token.file list * theory) parser
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  val loaded_files_current: theory -> bool
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  val begin_theory: Path.T -> Thy_Header.header -> theory list -> theory
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  val load_thy: bool -> HTML.symbols -> (Toplevel.transition -> Time.time option) -> int ->
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    Path.T -> Thy_Header.header -> Position.T -> string -> theory list ->
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    theory * (unit -> unit) * int
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end;
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structure Resources: RESOURCES =
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struct
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(* manage source files *)
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type files =
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 {master_dir: Path.T,  (*master directory of theory source*)
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  imports: (string * Position.T) list,  (*source specification of imports*)
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  provided: (Path.T * SHA1.digest) list};  (*source path, digest*)
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fun make_files (master_dir, imports, provided): files =
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 {master_dir = master_dir, imports = imports, provided = provided};
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structure Files = Theory_Data
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(
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  type T = files;
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  val empty = make_files (Path.current, [], []);
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  fun extend _ = empty;
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  fun merge _ = empty;
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);
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fun map_files f =
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  Files.map (fn {master_dir, imports, provided} =>
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    make_files (f (master_dir, imports, provided)));
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val master_directory = #master_dir o Files.get;
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val imports_of = #imports o Files.get;
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fun put_deps master_dir imports = map_files (fn _ => (master_dir, imports, []));
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(* theory files *)
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val thy_path = Path.ext "thy";
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fun check_file dir file = File.check_file (File.full_path dir file);
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fun check_thy dir thy_name =
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  let
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    val path = thy_path (Path.basic thy_name);
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    val master_file = check_file dir path;
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    val text = File.read master_file;
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    val {name = (name, pos), imports, keywords} =
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      Thy_Header.read (Path.position master_file) text;
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    val _ = thy_name <> name andalso
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      error ("Bad theory name " ^ quote name ^
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        " for file " ^ Path.print path ^ Position.here pos);
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  in
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   {master = (master_file, SHA1.digest text), text = text, theory_pos = pos,
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    imports = imports, keywords = keywords}
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  end;
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(* load files *)
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fun parse_files cmd =
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  Scan.ahead Parse.not_eof -- Parse.path >> (fn (tok, name) => fn thy =>
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    (case Token.get_files tok of
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      [] =>
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        let
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          val keywords = Thy_Header.get_keywords thy;
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          val master_dir = master_directory thy;
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          val pos = Token.pos_of tok;
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          val src_paths = Keyword.command_files keywords cmd (Path.explode name);
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        in map (Command.read_file master_dir pos) src_paths end
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    | files => map Exn.release files));
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fun provide (src_path, id) =
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  map_files (fn (master_dir, imports, provided) =>
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    if AList.defined (op =) provided src_path then
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      error ("Duplicate use of source file: " ^ Path.print src_path)
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    else (master_dir, imports, (src_path, id) :: provided));
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fun provide_parse_files cmd =
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  parse_files cmd >> (fn files => fn thy =>
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    let
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      val fs = files thy;
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      val thy' = fold (fn {src_path, digest, ...} => provide (src_path, digest)) fs thy;
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    in (fs, thy') end);
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fun load_file thy src_path =
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  let
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    val full_path = check_file (master_directory thy) src_path;
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    val text = File.read full_path;
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    val id = SHA1.digest text;
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  in ((full_path, id), text) end;
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fun loaded_files_current thy =
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  #provided (Files.get thy) |>
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    forall (fn (src_path, id) =>
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      (case try (load_file thy) src_path of
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        NONE => false
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      | SOME ((_, id'), _) => id = id'));
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(* load theory *)
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fun begin_theory master_dir {name, imports, keywords} parents =
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  Theory.begin_theory name parents
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  |> put_deps master_dir imports
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  |> Thy_Header.add_keywords keywords;
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fun excursion keywords master_dir last_timing init elements =
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  let
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    fun prepare_span st span =
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      Command_Span.content span
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      |> Command.read keywords (Command.read_thy st) master_dir init ([], ~1)
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      |> (fn tr => Toplevel.put_timing (last_timing tr) tr);
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    fun element_result span_elem (st, _) =
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      let
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        val elem = Thy_Syntax.map_element (prepare_span st) span_elem;
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        val (results, st') = Toplevel.element_result keywords elem st;
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        val pos' = Toplevel.pos_of (Thy_Syntax.last_element elem);
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      in (results, (st', pos')) end;
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    val (results, (end_state, end_pos)) =
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      fold_map element_result elements (Toplevel.toplevel, Position.none);
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    val thy = Toplevel.end_theory end_pos end_state;
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  in (results, thy) end;
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fun load_thy document symbols last_timing update_time master_dir header text_pos text parents =
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  let
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    val (name, _) = #name header;
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    val keywords =
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      fold (curry Keyword.merge_keywords o Thy_Header.get_keywords) parents
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        (Keyword.add_keywords (#keywords header) Keyword.empty_keywords);
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    val toks = Token.explode keywords text_pos text;
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    val spans = Outer_Syntax.parse_spans toks;
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    val elements = Thy_Syntax.parse_elements keywords spans;
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    fun init () =
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      begin_theory master_dir header parents
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      |> Present.begin_theory update_time
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        (fn () => implode (map (HTML.present_span symbols keywords) spans));
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    val (results, thy) =
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      cond_timeit true ("theory " ^ quote name)
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        (fn () => excursion keywords master_dir last_timing init elements);
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    fun present () =
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      let
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        val res = filter_out (Toplevel.is_ignored o #1) (maps Toplevel.join_results results);
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      in
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        if exists (Toplevel.is_skipped_proof o #2) res then
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          warning ("Cannot present theory with skipped proofs: " ^ quote name)
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        else
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          let val tex_source = Thy_Output.present_thy thy res toks |> Buffer.content;
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          in if document then Present.theory_output name tex_source else () end
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      end;
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  in (thy, present, size text) end;
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42002
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(* antiquotations *)
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local
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fun err msg pos = error (msg ^ Position.here pos);
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fun check_path check_file ctxt dir (name, pos) =
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  let
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    val _ = Context_Position.report ctxt pos Markup.language_path;
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    val path = Path.append dir (Path.explode name) handle ERROR msg => err msg pos;
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    val _ = Path.expand path handle ERROR msg => err msg pos;
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    val _ = Context_Position.report ctxt pos (Markup.path (Path.smart_implode path));
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    val _ =
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      (case check_file of
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        NONE => path
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      | SOME check => (check path handle ERROR msg => err msg pos));
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  in path end;
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fun document_antiq check_file ctxt (name, pos) =
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  let
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    val dir = master_directory (Proof_Context.theory_of ctxt);
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    val _ = check_path check_file ctxt dir (name, pos);
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  in
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    space_explode "/" name
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    |> map Latex.output_ascii
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    |> space_implode (Latex.output_ascii "/" ^ "\\discretionary{}{}{}")
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    |> enclose "\\isatt{" "}"
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  end;
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fun ML_antiq check_file ctxt (name, pos) =
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  let val path = check_path check_file ctxt Path.current (name, pos);
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  in "Path.explode " ^ ML_Syntax.print_string (Path.implode path) end;
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in
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val _ = Theory.setup
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 (Thy_Output.antiquotation @{binding path} (Scan.lift (Parse.position Parse.path))
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    (document_antiq NONE o #context) #>
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  Thy_Output.antiquotation @{binding file} (Scan.lift (Parse.position Parse.path))
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    (document_antiq (SOME File.check_file) o #context) #>
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  Thy_Output.antiquotation @{binding dir} (Scan.lift (Parse.position Parse.path))
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    (document_antiq (SOME File.check_dir) o #context) #>
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  ML_Antiquotation.value @{binding path}
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    (Args.context -- Scan.lift (Parse.position Parse.path)
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      >> uncurry (ML_antiq NONE)) #>
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  ML_Antiquotation.value @{binding file}
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    (Args.context -- Scan.lift (Parse.position Parse.path)
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      >> uncurry (ML_antiq (SOME File.check_file))) #>
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  ML_Antiquotation.value @{binding dir}
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    (Args.context -- Scan.lift (Parse.position Parse.path)
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      >> uncurry (ML_antiq (SOME File.check_dir))));
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end;
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end;