author | clasohm |
Fri, 18 Nov 1994 13:08:10 +0100 | |
changeset 715 | f76ad10f5802 |
parent 586 | 201e115d8031 |
child 746 | 6e815617d79f |
permissions | -rw-r--r-- |
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(* Title: Pure/Thy/thy_read.ML |
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ID: $Id$ |
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Author: Carsten Clasohm and Markus Wenzel and Sonia Mahjoub and |
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Tobias Nipkow and L C Paulson |
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Copyright 1994 TU Muenchen |
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(* FIXME !? *) |
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Reading and writing the theory definition files. |
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(* FIXME !? *) |
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For theory XXX, the input file is called XXX.thy |
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the output file is called .XXX.thy.ML |
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and it then tries to read XXX.ML |
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*) |
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datatype thy_info = ThyInfo of {path: string, |
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children: string list, |
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thy_time: string option, |
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ml_time: string option, |
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theory: theory option, |
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thms: thm Symtab.table}; |
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signature READTHY = |
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sig |
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datatype basetype = Thy of string |
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| File of string |
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val loaded_thys : thy_info Symtab.table ref |
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val loadpath : string list ref |
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val delete_tmpfiles: bool ref |
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val use_thy : string -> unit |
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val update : unit -> unit |
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val time_use_thy : string -> unit |
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val unlink_thy : string -> unit |
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val mk_base : basetype list -> string -> bool -> theory |
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val store_theory : theory * string -> unit |
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val theory_of_sign: Sign.sg -> theory |
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val theory_of_thm: thm -> theory |
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val store_thm: string * thm -> thm |
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val qed: string -> unit |
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val get_thm: theory -> string -> thm |
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val thms_of: theory -> (string * thm) list |
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end; |
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functor ReadthyFUN(structure ThySyn: THY_SYN): READTHY = |
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struct |
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datatype basetype = Thy of string |
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| File of string; |
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val loaded_thys = ref (Symtab.make [("Pure", ThyInfo {path = "", children = [], |
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thy_time = Some "", ml_time = Some "", |
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theory = Some pure_thy, |
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thms = Symtab.null})]); |
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val loadpath = ref ["."]; (*default search path for theory files *) |
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val delete_tmpfiles = ref true; (*remove temporary files after use *) |
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(*Make name of the output ML file for a theory *) |
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fun out_name tname = "." ^ tname ^ ".thy.ML"; |
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(*Read a file specified by thy_file containing theory thy *) |
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fun read_thy tname thy_file = |
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let |
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val instream = open_in thy_file; |
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val outstream = open_out (out_name tname); |
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in |
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output (outstream, ThySyn.parse tname (input (instream, 999999))); |
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close_out outstream; |
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close_in instream |
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end; |
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fun file_exists file = |
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let val instream = open_in file in close_in instream; true end |
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handle Io _ => false; |
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(*Get thy_info for a loaded theory *) |
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fun get_thyinfo tname = Symtab.lookup (!loaded_thys, tname); |
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(*Check if a theory was already loaded *) |
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fun already_loaded thy = |
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let val t = get_thyinfo thy |
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in if is_none t then false |
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else let val ThyInfo {thy_time, ml_time, ...} = the t |
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in if is_none thy_time orelse is_none ml_time then false |
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else true |
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end |
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end; |
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(*Check if a theory file has changed since its last use. |
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Return a pair of boolean values for .thy and for .ML *) |
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fun thy_unchanged thy thy_file ml_file = |
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let val t = get_thyinfo thy |
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in if is_some t then |
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let val ThyInfo {thy_time, ml_time, ...} = the t |
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val tn = is_none thy_time; |
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val mn = is_none ml_time |
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in if not tn andalso not mn then |
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((file_info thy_file = the thy_time), |
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(file_info ml_file = the ml_time)) |
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else if not tn andalso mn then (true, false) |
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else (false, false) |
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end |
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else (false, false) |
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end; |
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exception FILE_NOT_FOUND; (*raised by find_file *) |
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(*Find a file using a list of paths if no absolute or relative path is |
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specified.*) |
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fun find_file "" name = |
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let fun find_it (curr :: paths) = |
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if file_exists (tack_on curr name) then |
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tack_on curr name |
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else |
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find_it paths |
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| find_it [] = "" |
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in find_it (!loadpath) end |
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| find_file path name = |
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if file_exists (tack_on path name) then tack_on path name |
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else ""; |
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(*Get absolute pathnames for a new or already loaded theory *) |
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fun get_filenames path name = |
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let fun make_absolute file = |
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if file = "" then "" else |
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if hd (explode file) = "/" then file else tack_on (pwd ()) file; |
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fun new_filename () = |
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let val found = find_file path (name ^ ".thy") |
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handle FILE_NOT_FOUND => ""; |
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val thy_file = make_absolute found; |
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val (thy_path, _) = split_filename thy_file; |
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val found = find_file path (name ^ ".ML"); |
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val ml_file = if thy_file = "" then make_absolute found |
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else if file_exists (tack_on thy_path (name ^ ".ML")) |
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then tack_on thy_path (name ^ ".ML") |
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else ""; |
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val searched_dirs = if path = "" then (!loadpath) else [path] |
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in if thy_file = "" andalso ml_file = "" then |
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error ("Could not find file \"" ^ name ^ ".thy\" or \"" |
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^ name ^ ".ML\" for theory \"" ^ name ^ "\"\n" |
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^ "in the following directories: \"" ^ |
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(space_implode "\", \"" searched_dirs) ^ "\"") |
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else (); |
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(thy_file, ml_file) |
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end; |
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val tinfo = get_thyinfo name; |
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in if is_some tinfo andalso path = "" then |
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let val ThyInfo {path = abs_path, ...} = the tinfo; |
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val (thy_file, ml_file) = if abs_path = "" then new_filename () |
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else (find_file abs_path (name ^ ".thy"), |
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find_file abs_path (name ^ ".ML")) |
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in if thy_file = "" andalso ml_file = "" then |
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(writeln ("Warning: File \"" ^ (tack_on path name) |
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^ ".thy\"\ncontaining theory \"" ^ name |
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^ "\" no longer exists."); |
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new_filename () |
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) |
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else (thy_file, ml_file) |
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end |
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else new_filename () |
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end; |
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(*Remove theory from all child lists in loaded_thys *) |
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fun unlink_thy tname = |
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let fun remove (ThyInfo {path, children, thy_time, ml_time, theory, thms}) = |
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ThyInfo {path = path, children = children \ tname, |
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thy_time = thy_time, ml_time = ml_time, |
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theory = theory, thms = thms} |
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in loaded_thys := Symtab.map remove (!loaded_thys) end; |
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(*Remove a theory from loaded_thys *) |
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fun remove_thy tname = |
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loaded_thys := Symtab.make (filter_out (fn (id, _) => id = tname) |
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(Symtab.dest (!loaded_thys))); |
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(*Change thy_time and ml_time for an existent item *) |
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fun set_info thy_time ml_time tname = |
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let val ThyInfo {path, children, theory, thms, ...} = |
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the (Symtab.lookup (!loaded_thys, tname)); |
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in loaded_thys := Symtab.update ((tname, |
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ThyInfo {path = path, children = children, |
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thy_time = Some thy_time, ml_time = Some ml_time, |
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theory = theory, thms = thms}), !loaded_thys) |
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end; |
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(*Mark theory as changed since last read if it has been completly read *) |
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fun mark_outdated tname = |
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if already_loaded tname then set_info "" "" tname else (); |
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(*Read .thy and .ML files that haven't been read yet or have changed since |
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they were last read; |
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loaded_thys is a thy_info list ref containing all theories that have |
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completly been read by this and preceeding use_thy calls. |
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If a theory changed since its last use its children are marked as changed *) |
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fun use_thy name = |
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let val (path, tname) = split_filename name; |
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val (thy_file, ml_file) = get_filenames path tname; |
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val (abs_path, _) = if thy_file = "" then split_filename ml_file |
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else split_filename thy_file; |
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val (thy_uptodate, ml_uptodate) = thy_unchanged tname |
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thy_file ml_file; |
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(*Set absolute path for loaded theory *) |
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fun set_path () = |
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let val ThyInfo {children, thy_time, ml_time, theory, thms, ...} = |
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the (Symtab.lookup (!loaded_thys, tname)); |
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in loaded_thys := Symtab.update ((tname, |
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ThyInfo {path = abs_path, children = children, |
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thy_time = thy_time, ml_time = ml_time, |
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theory = theory, thms = thms}), |
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!loaded_thys) |
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end; |
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(*Mark all direct descendants of a theory as changed *) |
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fun mark_children thy = |
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let val ThyInfo {children, ...} = the (get_thyinfo thy) |
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val loaded = filter already_loaded children |
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in if loaded <> [] then |
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(writeln ("The following children of theory " ^ (quote thy) |
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^ " are now out-of-date: " |
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^ (quote (space_implode "\",\"" loaded))); |
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seq mark_outdated loaded |
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) |
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else () |
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end; |
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(*Remove all theorems associated with a theory*) |
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fun delete_thms () = |
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let val tinfo = case Symtab.lookup (!loaded_thys, tname) of |
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Some (ThyInfo {path, children, thy_time, ml_time, theory, ...}) => |
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ThyInfo {path = path, children = children, |
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thy_time = thy_time, ml_time = ml_time, |
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theory = theory, thms = Symtab.null} |
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| None => ThyInfo {path = "", children = [], |
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thy_time = None, ml_time = None, |
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theory = None, thms = Symtab.null}; |
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in loaded_thys := Symtab.update ((tname, tinfo), !loaded_thys) end; |
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in if thy_uptodate andalso ml_uptodate then () |
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else |
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( |
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delete_thms (); |
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if thy_uptodate orelse thy_file = "" then () |
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else (writeln ("Reading \"" ^ name ^ ".thy\""); |
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read_thy tname thy_file; |
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use (out_name tname); |
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use_string |
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["store_theory (" ^ tname ^ ".thy, " ^ quote tname ^ ");"] |
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(*Store theory object in case it is needed for store_thm |
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while reading the ML file*) |
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); |
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if ml_file = "" then () |
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else (writeln ("Reading \"" ^ name ^ ".ML\""); |
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use ml_file); |
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use_string ["store_theory (" ^ tname ^ ".thy, " ^ quote tname ^ ");"]; |
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(*Store theory again because it could have been redefined*) |
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(*Now set the correct info*) |
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set_info (file_info thy_file) (file_info ml_file) tname; |
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set_path (); |
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(*Mark theories that have to be reloaded*) |
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mark_children tname; |
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(*Remove temporary files*) |
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if not (!delete_tmpfiles) orelse (thy_file = "") orelse thy_uptodate |
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then () |
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else delete_file (out_name tname) |
391 | 278 |
) |
279 |
end; |
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281 |
fun time_use_thy tname = timeit(fn()=> |
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559 | 282 |
(writeln("\n**** Starting Theory " ^ tname ^ " ****"); |
391 | 283 |
use_thy tname; |
284 |
writeln("\n**** Finished Theory " ^ tname ^ " ****")) |
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); |
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286 |
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287 |
(*Load all thy or ML files that have been changed and also |
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288 |
all theories that depend on them *) |
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289 |
fun update () = |
|
290 |
let (*List theories in the order they have to be loaded *) |
|
291 |
fun load_order [] result = result |
|
292 |
| load_order thys result = |
|
293 |
let fun next_level (t :: ts) = |
|
294 |
let val thy = get_thyinfo t |
|
295 |
in if is_some thy then |
|
296 |
let val ThyInfo {children, ...} = the thy |
|
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|
297 |
in children union (next_level ts) end |
391 | 298 |
else next_level ts |
299 |
end |
|
300 |
| next_level [] = []; |
|
559 | 301 |
|
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|
302 |
val children = next_level thys; |
391 | 303 |
in load_order children ((result \\ children) @ children) end; |
304 |
||
305 |
fun reload_changed (t :: ts) = |
|
306 |
let val thy = get_thyinfo t; |
|
307 |
||
308 |
fun abspath () = |
|
309 |
if is_some thy then |
|
310 |
let val ThyInfo {path, ...} = the thy in path end |
|
311 |
else ""; |
|
312 |
||
313 |
val (thy_file, ml_file) = get_filenames (abspath ()) t; |
|
314 |
val (thy_uptodate, ml_uptodate) = |
|
315 |
thy_unchanged t thy_file ml_file; |
|
316 |
in if thy_uptodate andalso ml_uptodate then () |
|
317 |
else use_thy t; |
|
318 |
reload_changed ts |
|
319 |
end |
|
320 |
| reload_changed [] = (); |
|
321 |
||
322 |
(*Remove all theories that are no descendants of Pure. |
|
323 |
If there are still children in the deleted theory's list |
|
324 |
schedule them for reloading *) |
|
325 |
fun collect_garbage not_garbage = |
|
476
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|
326 |
let fun collect ((tname, ThyInfo {children, ...}) :: ts) = |
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|
327 |
if tname mem not_garbage then collect ts |
559 | 328 |
else (writeln ("Theory \"" ^ tname |
476
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|
329 |
^ "\" is no longer linked with Pure - removing it."); |
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|
330 |
remove_thy tname; |
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diff
changeset
|
331 |
seq mark_outdated children) |
391 | 332 |
| collect [] = () |
333 |
||
559 | 334 |
in collect (Symtab.dest (!loaded_thys)) end; |
391 | 335 |
in collect_garbage ("Pure" :: (load_order ["Pure"] [])); |
336 |
reload_changed (load_order ["Pure"] []) |
|
337 |
end; |
|
338 |
||
339 |
(*Merge theories to build a base for a new theory. |
|
340 |
Base members are only loaded if they are missing. *) |
|
586
201e115d8031
renamed base_on into mk_base and moved it to the beginning of the generated
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diff
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|
341 |
fun mk_base bases child mk_draft = |
391 | 342 |
let (*List all descendants of a theory list *) |
343 |
fun list_descendants (t :: ts) = |
|
344 |
let val tinfo = get_thyinfo t |
|
345 |
in if is_some tinfo then |
|
346 |
let val ThyInfo {children, ...} = the tinfo |
|
347 |
in children union (list_descendants (ts union children)) |
|
348 |
end |
|
349 |
else [] |
|
350 |
end |
|
351 |
| list_descendants [] = []; |
|
352 |
||
353 |
(*Show the cycle that would be created by add_child *) |
|
354 |
fun show_cycle base = |
|
355 |
let fun find_it result curr = |
|
356 |
let val tinfo = get_thyinfo curr |
|
559 | 357 |
in if base = curr then |
391 | 358 |
error ("Cyclic dependency of theories: " |
359 |
^ child ^ "->" ^ base ^ result) |
|
360 |
else if is_some tinfo then |
|
361 |
let val ThyInfo {children, ...} = the tinfo |
|
362 |
in seq (find_it ("->" ^ curr ^ result)) children |
|
363 |
end |
|
364 |
else () |
|
365 |
end |
|
366 |
in find_it "" child end; |
|
559 | 367 |
|
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parents:
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diff
changeset
|
368 |
(*Check if a cycle would be created by add_child *) |
391 | 369 |
fun find_cycle base = |
370 |
if base mem (list_descendants [child]) then show_cycle base |
|
371 |
else (); |
|
559 | 372 |
|
391 | 373 |
(*Add child to child list of base *) |
374 |
fun add_child base = |
|
476
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parents:
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diff
changeset
|
375 |
let val tinfo = |
559 | 376 |
case Symtab.lookup (!loaded_thys, base) of |
377 |
Some (ThyInfo {path, children, thy_time, ml_time, |
|
476
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diff
changeset
|
378 |
theory, thms}) => |
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diff
changeset
|
379 |
ThyInfo {path = path, children = child ins children, |
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diff
changeset
|
380 |
thy_time = thy_time, ml_time = ml_time, |
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parents:
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diff
changeset
|
381 |
theory = theory, thms = thms} |
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diff
changeset
|
382 |
| None => ThyInfo {path = "", children = [child], |
559 | 383 |
thy_time = None, ml_time = None, |
384 |
theory = None, thms = Symtab.null}; |
|
476
836cad329311
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clasohm
parents:
426
diff
changeset
|
385 |
in loaded_thys := Symtab.update ((base, tinfo), !loaded_thys) end; |
391 | 386 |
|
387 |
(*Load a base theory if not already done |
|
388 |
and no cycle would be created *) |
|
389 |
fun load base = |
|
390 |
let val thy_present = already_loaded base |
|
426
767367131b47
replaced "foldl merge_theories" by "merge_thy_list" in base_on
clasohm
parents:
424
diff
changeset
|
391 |
(*test this before child is added *) |
391 | 392 |
in |
393 |
if child = base then |
|
394 |
error ("Cyclic dependency of theories: " ^ child |
|
395 |
^ "->" ^ child) |
|
559 | 396 |
else |
391 | 397 |
(find_cycle base; |
398 |
add_child base; |
|
399 |
if thy_present then () |
|
400 |
else (writeln ("Autoloading theory " ^ (quote base) |
|
401 |
^ " (used by " ^ (quote child) ^ ")"); |
|
402 |
use_thy base) |
|
403 |
) |
|
559 | 404 |
end; |
391 | 405 |
|
406 |
(*Load all needed files and make a list of all real theories *) |
|
407 |
fun load_base (Thy b :: bs) = |
|
408 |
(load b; |
|
409 |
b :: (load_base bs)) |
|
410 |
| load_base (File b :: bs) = |
|
411 |
(load b; |
|
412 |
load_base bs) (*don't add it to merge_theories' parameter *) |
|
413 |
| load_base [] = []; |
|
414 |
||
415 |
(*Get theory object for a loaded theory *) |
|
416 |
fun get_theory name = |
|
417 |
let val ThyInfo {theory, ...} = the (get_thyinfo name) |
|
418 |
in the theory end; |
|
419 |
||
420 |
val mergelist = (unlink_thy child; |
|
421 |
load_base bases); |
|
422 |
in writeln ("Loading theory " ^ (quote child)); |
|
426
767367131b47
replaced "foldl merge_theories" by "merge_thy_list" in base_on
clasohm
parents:
424
diff
changeset
|
423 |
merge_thy_list mk_draft (map get_theory mergelist) end; |
391 | 424 |
|
559 | 425 |
(*Change theory object for an existent item of loaded_thys |
391 | 426 |
or create a new item *) |
476
836cad329311
added check for concistency of filename and theory name;
clasohm
parents:
426
diff
changeset
|
427 |
fun store_theory (thy, tname) = |
559 | 428 |
let val tinfo = case Symtab.lookup (!loaded_thys, tname) of |
476
836cad329311
added check for concistency of filename and theory name;
clasohm
parents:
426
diff
changeset
|
429 |
Some (ThyInfo {path, children, thy_time, ml_time, thms, ...}) => |
836cad329311
added check for concistency of filename and theory name;
clasohm
parents:
426
diff
changeset
|
430 |
ThyInfo {path = path, children = children, |
836cad329311
added check for concistency of filename and theory name;
clasohm
parents:
426
diff
changeset
|
431 |
thy_time = thy_time, ml_time = ml_time, |
836cad329311
added check for concistency of filename and theory name;
clasohm
parents:
426
diff
changeset
|
432 |
theory = Some thy, thms = thms} |
836cad329311
added check for concistency of filename and theory name;
clasohm
parents:
426
diff
changeset
|
433 |
| None => ThyInfo {path = "", children = [], |
836cad329311
added check for concistency of filename and theory name;
clasohm
parents:
426
diff
changeset
|
434 |
thy_time = Some "", ml_time = Some "", |
559 | 435 |
theory = Some thy, thms = Symtab.null}; |
476
836cad329311
added check for concistency of filename and theory name;
clasohm
parents:
426
diff
changeset
|
436 |
in loaded_thys := Symtab.update ((tname, tinfo), !loaded_thys) end; |
836cad329311
added check for concistency of filename and theory name;
clasohm
parents:
426
diff
changeset
|
437 |
|
559 | 438 |
|
439 |
||
440 |
(** store and retrieve theorems **) |
|
441 |
||
715
f76ad10f5802
added call of store_theory after thy file has been read
clasohm
parents:
586
diff
changeset
|
442 |
(*Guess to which theory a signature belongs and return it's thy_info*) |
559 | 443 |
fun thyinfo_of_sign sg = |
444 |
let |
|
445 |
val ref xname = hd (#stamps (Sign.rep_sg sg)); |
|
446 |
val opt_info = get_thyinfo xname; |
|
476
836cad329311
added check for concistency of filename and theory name;
clasohm
parents:
426
diff
changeset
|
447 |
|
559 | 448 |
fun eq_sg (ThyInfo {theory = None, ...}) = false |
715
f76ad10f5802
added call of store_theory after thy file has been read
clasohm
parents:
586
diff
changeset
|
449 |
| eq_sg (ThyInfo {theory = Some thy, ...}) = Sign.eq_sg (sg,sign_of thy); |
559 | 450 |
|
451 |
val show_sg = Pretty.str_of o Sign.pretty_sg; |
|
452 |
in |
|
453 |
if is_some opt_info andalso eq_sg (the opt_info) then |
|
454 |
(xname, the opt_info) |
|
455 |
else |
|
456 |
(case Symtab.find_first (eq_sg o snd) (! loaded_thys) of |
|
457 |
Some name_info => name_info |
|
458 |
| None => error ("Theory " ^ show_sg sg ^ " not stored by loader")) |
|
476
836cad329311
added check for concistency of filename and theory name;
clasohm
parents:
426
diff
changeset
|
459 |
end; |
391 | 460 |
|
559 | 461 |
|
715
f76ad10f5802
added call of store_theory after thy file has been read
clasohm
parents:
586
diff
changeset
|
462 |
(*Try to get the theory object corresponding to a given signature*) |
559 | 463 |
fun theory_of_sign sg = |
464 |
(case thyinfo_of_sign sg of |
|
465 |
(_, ThyInfo {theory = Some thy, ...}) => thy |
|
466 |
| _ => sys_error "theory_of_sign"); |
|
476
836cad329311
added check for concistency of filename and theory name;
clasohm
parents:
426
diff
changeset
|
467 |
|
715
f76ad10f5802
added call of store_theory after thy file has been read
clasohm
parents:
586
diff
changeset
|
468 |
(*Try to get the theory object corresponding to a given theorem*) |
559 | 469 |
val theory_of_thm = theory_of_sign o #sign o rep_thm; |
470 |
||
471 |
||
715
f76ad10f5802
added call of store_theory after thy file has been read
clasohm
parents:
586
diff
changeset
|
472 |
(* Store theorems *) |
476
836cad329311
added check for concistency of filename and theory name;
clasohm
parents:
426
diff
changeset
|
473 |
|
715
f76ad10f5802
added call of store_theory after thy file has been read
clasohm
parents:
586
diff
changeset
|
474 |
(*Store a theorem in the thy_info of its theory*) |
559 | 475 |
fun store_thm (name, thm) = |
476 |
let |
|
477 |
val (thy_name, ThyInfo {path, children, thy_time, ml_time, theory, thms}) = |
|
478 |
thyinfo_of_sign (#sign (rep_thm thm)); |
|
479 |
val thms' = Symtab.update_new ((name, thm), thms) |
|
480 |
handle Symtab.DUPLICATE s => error ("Duplicate theorem name " ^ quote s); |
|
481 |
in |
|
482 |
loaded_thys := Symtab.update |
|
715
f76ad10f5802
added call of store_theory after thy file has been read
clasohm
parents:
586
diff
changeset
|
483 |
((thy_name, ThyInfo {path = path, children = children, |
f76ad10f5802
added call of store_theory after thy file has been read
clasohm
parents:
586
diff
changeset
|
484 |
thy_time = thy_time, ml_time = ml_time, theory = theory, thms = thms'}), |
f76ad10f5802
added call of store_theory after thy file has been read
clasohm
parents:
586
diff
changeset
|
485 |
! loaded_thys); |
559 | 486 |
thm |
487 |
end; |
|
488 |
||
715
f76ad10f5802
added call of store_theory after thy file has been read
clasohm
parents:
586
diff
changeset
|
489 |
(*Store result of proof in loaded_thys and as ML value*) |
559 | 490 |
fun qed name = |
491 |
use_string ["val " ^ name ^ " = store_thm (" ^ quote name ^ ", result ());"]; |
|
476
836cad329311
added check for concistency of filename and theory name;
clasohm
parents:
426
diff
changeset
|
492 |
|
559 | 493 |
|
715
f76ad10f5802
added call of store_theory after thy file has been read
clasohm
parents:
586
diff
changeset
|
494 |
(* Retrieve theorems *) |
559 | 495 |
|
715
f76ad10f5802
added call of store_theory after thy file has been read
clasohm
parents:
586
diff
changeset
|
496 |
(*Get all theorems belonging to a given theory object*) |
559 | 497 |
fun thmtab thy = |
498 |
let val (_, ThyInfo {thms, ...}) = thyinfo_of_sign (sign_of thy) |
|
499 |
in thms end; |
|
476
836cad329311
added check for concistency of filename and theory name;
clasohm
parents:
426
diff
changeset
|
500 |
|
715
f76ad10f5802
added call of store_theory after thy file has been read
clasohm
parents:
586
diff
changeset
|
501 |
(*Get a stored theorem specified by theory and name*) |
559 | 502 |
fun get_thm thy name = |
503 |
(case Symtab.lookup (thmtab thy, name) of |
|
504 |
Some thm => thm |
|
505 |
| None => raise THEORY ("get_thm: no theorem " ^ quote name, [thy])); |
|
506 |
||
715
f76ad10f5802
added call of store_theory after thy file has been read
clasohm
parents:
586
diff
changeset
|
507 |
(*Get stored theorems of a theory*) |
559 | 508 |
val thms_of = Symtab.dest o thmtab; |
509 |
||
510 |
||
391 | 511 |
end; |