src/Pure/Isar/attrib.ML
author wenzelm
Wed May 14 20:30:05 2008 +0200 (2008-05-14)
changeset 26891 bfa1944e5238
parent 26715 00ff79ab6e6b
child 27729 aaf08262b177
permissions -rw-r--r--
added defined;
     1 (*  Title:      Pure/Isar/attrib.ML
     2     ID:         $Id$
     3     Author:     Markus Wenzel, TU Muenchen
     4 
     5 Symbolic representation of attributes -- with name and syntax.
     6 *)
     7 
     8 signature BASIC_ATTRIB =
     9 sig
    10   val print_attributes: theory -> unit
    11 end;
    12 
    13 signature ATTRIB =
    14 sig
    15   include BASIC_ATTRIB
    16   type src
    17   val intern: theory -> xstring -> string
    18   val intern_src: theory -> src -> src
    19   val pretty_attribs: Proof.context -> src list -> Pretty.T list
    20   val defined: theory -> string -> bool
    21   val attribute: theory -> src -> attribute
    22   val attribute_i: theory -> src -> attribute
    23   val eval_thms: Proof.context -> (Facts.ref * src list) list -> thm list
    24   val map_specs: ('a -> 'att) ->
    25     (('c * 'a list) * 'd) list -> (('c * 'att list) * 'd) list
    26   val map_facts: ('a -> 'att) ->
    27     (('c * 'a list) * ('d * 'a list) list) list ->
    28     (('c * 'att list) * ('d * 'att list) list) list
    29   val crude_closure: Proof.context -> src -> src
    30   val add_attributes: (bstring * (src -> attribute) * string) list -> theory -> theory
    31   val syntax: (Context.generic * Args.T list ->
    32     attribute * (Context.generic * Args.T list)) -> src -> attribute
    33   val no_args: attribute -> src -> attribute
    34   val add_del_args: attribute -> attribute -> src -> attribute
    35   val thm: Context.generic * Args.T list -> thm * (Context.generic * Args.T list)
    36   val thms: Context.generic * Args.T list -> thm list * (Context.generic * Args.T list)
    37   val multi_thm: Context.generic * Args.T list -> thm list * (Context.generic * Args.T list)
    38   val print_configs: Proof.context -> unit
    39   val internal: (morphism -> attribute) -> src
    40   val register_config: Config.value Config.T -> theory -> theory
    41   val config_bool: bstring -> bool -> bool Config.T * (theory -> theory)
    42   val config_int: bstring -> int -> int Config.T * (theory -> theory)
    43   val config_string: bstring -> string -> string Config.T * (theory -> theory)
    44   val config_bool_global: bstring -> bool -> bool Config.T * (theory -> theory)
    45   val config_int_global: bstring -> int -> int Config.T * (theory -> theory)
    46   val config_string_global: bstring -> string -> string Config.T * (theory -> theory)
    47 end;
    48 
    49 structure Attrib: ATTRIB =
    50 struct
    51 
    52 type src = Args.src;
    53 
    54 (** named attributes **)
    55 
    56 (* theory data *)
    57 
    58 structure Attributes = TheoryDataFun
    59 (
    60   type T = (((src -> attribute) * string) * stamp) NameSpace.table;
    61   val empty = NameSpace.empty_table;
    62   val copy = I;
    63   val extend = I;
    64   fun merge _ tables : T = NameSpace.merge_tables (eq_snd (op =)) tables handle Symtab.DUP dup =>
    65     error ("Attempt to merge different versions of attribute " ^ quote dup);
    66 );
    67 
    68 fun print_attributes thy =
    69   let
    70     val attribs = Attributes.get thy;
    71     fun prt_attr (name, ((_, comment), _)) = Pretty.block
    72       [Pretty.str (name ^ ":"), Pretty.brk 2, Pretty.str comment];
    73   in
    74     [Pretty.big_list "attributes:" (map prt_attr (NameSpace.extern_table attribs))]
    75     |> Pretty.chunks |> Pretty.writeln
    76   end;
    77 
    78 
    79 (* name space *)
    80 
    81 val intern = NameSpace.intern o #1 o Attributes.get;
    82 val intern_src = Args.map_name o intern;
    83 
    84 val extern = NameSpace.extern o #1 o Attributes.get o ProofContext.theory_of;
    85 
    86 
    87 (* pretty printing *)
    88 
    89 fun pretty_attribs _ [] = []
    90   | pretty_attribs ctxt srcs =
    91       [Pretty.enclose "[" "]"
    92         (Pretty.commas (map (Args.pretty_src ctxt o Args.map_name (extern ctxt)) srcs))];
    93 
    94 
    95 (* get attributes *)
    96 
    97 val defined = Symtab.defined o #2 o Attributes.get;
    98 
    99 fun attribute_i thy =
   100   let
   101     val attrs = #2 (Attributes.get thy);
   102     fun attr src =
   103       let val ((name, _), pos) = Args.dest_src src in
   104         (case Symtab.lookup attrs name of
   105           NONE => error ("Unknown attribute: " ^ quote name ^ Position.str_of pos)
   106         | SOME ((att, _), _) => att src)
   107       end;
   108   in attr end;
   109 
   110 fun attribute thy = attribute_i thy o intern_src thy;
   111 
   112 fun eval_thms ctxt args = ProofContext.note_thmss Thm.theoremK
   113     [(("", []), map (apsnd (map (attribute (ProofContext.theory_of ctxt)))) args)] ctxt
   114   |> fst |> maps snd;
   115 
   116 
   117 (* attributed declarations *)
   118 
   119 fun map_specs f = map (apfst (apsnd (map f)));
   120 fun map_facts f = map (apfst (apsnd (map f)) o apsnd (map (apsnd (map f))));
   121 
   122 
   123 (* crude_closure *)
   124 
   125 (*Produce closure without knowing facts in advance! The following
   126   works reasonably well for attribute parsers that do not peek at the
   127   thm structure.*)
   128 
   129 fun crude_closure ctxt src =
   130  (try (fn () => attribute_i (ProofContext.theory_of ctxt) src
   131     (Context.Proof ctxt, Drule.asm_rl)) ();
   132   Args.closure src);
   133 
   134 
   135 (* add_attributes *)
   136 
   137 fun add_attributes raw_attrs thy =
   138   let
   139     val new_attrs =
   140       raw_attrs |> map (fn (name, att, comment) => (name, ((att, comment), stamp ())));
   141     fun add attrs = NameSpace.extend_table (Sign.naming_of thy) new_attrs attrs
   142       handle Symtab.DUP dup => error ("Duplicate declaration of attributes " ^ quote dup);
   143   in Attributes.map add thy end;
   144 
   145 
   146 (* attribute syntax *)
   147 
   148 fun syntax scan src (st, th) =
   149   let val (f: attribute, st') = Args.syntax "attribute" scan src st
   150   in f (st', th) end;
   151 
   152 fun no_args x = syntax (Scan.succeed x);
   153 
   154 fun add_del_args add del = syntax
   155   (Scan.lift (Args.add >> K add || Args.del >> K del || Scan.succeed add));
   156 
   157 
   158 
   159 (** parsing attributed theorems **)
   160 
   161 local
   162 
   163 val fact_name = Args.internal_fact >> K "<fact>" || Args.name;
   164 
   165 fun gen_thm pick = Scan.depend (fn context =>
   166   let
   167     val thy = Context.theory_of context;
   168     val get = Context.cases (PureThy.get_fact context) ProofContext.get_fact context;
   169     val get_fact = get o Facts.Fact;
   170     val get_named = get o Facts.named;
   171   in
   172     Args.$$$ "[" |-- Args.attribs (intern thy) --| Args.$$$ "]" >> (fn srcs =>
   173       let
   174         val atts = map (attribute_i thy) srcs;
   175         val (context', th') = Library.apply atts (context, Drule.dummy_thm);
   176       in (context', pick "" [th']) end)
   177     ||
   178     (Scan.ahead Args.alt_name -- Args.named_fact get_fact
   179       >> (fn (s, fact) => ("", Facts.Fact s, fact))
   180     || Scan.ahead fact_name -- Args.position (Args.named_fact get_named) -- Scan.option Args.thm_sel
   181       >> (fn ((name, (fact, pos)), sel) => (name, Facts.Named ((name, pos), sel), fact)))
   182     -- Args.opt_attribs (intern thy) >> (fn ((name, thmref, fact), srcs) =>
   183       let
   184         val ths = Facts.select thmref fact;
   185         val atts = map (attribute_i thy) srcs;
   186         val (context', ths') = foldl_map (Library.apply atts) (context, ths);
   187       in (context', pick name ths') end)
   188   end);
   189 
   190 in
   191 
   192 val thm = gen_thm Facts.the_single;
   193 val multi_thm = gen_thm (K I);
   194 val thms = Scan.repeat multi_thm >> flat;
   195 
   196 end;
   197 
   198 
   199 
   200 (** basic attributes **)
   201 
   202 (* internal *)
   203 
   204 fun internal att = Args.src (("Pure.attribute", [Args.mk_attribute att]), Position.none);
   205 
   206 val internal_att =
   207   syntax (Scan.lift Args.internal_attribute >> Morphism.form);
   208 
   209 
   210 (* tags *)
   211 
   212 val tagged = syntax (Scan.lift (Args.name -- Args.name) >> PureThy.tag);
   213 val untagged = syntax (Scan.lift Args.name >> PureThy.untag);
   214 
   215 val kind = syntax (Scan.lift Args.name >> PureThy.kind);
   216 
   217 
   218 (* rule composition *)
   219 
   220 val COMP_att =
   221   syntax (Scan.lift (Scan.optional (Args.bracks Args.nat) 1) -- thm
   222     >> (fn (i, B) => Thm.rule_attribute (fn _ => fn A => Drule.compose_single (A, i, B))));
   223 
   224 val THEN_att =
   225   syntax (Scan.lift (Scan.optional (Args.bracks Args.nat) 1) -- thm
   226     >> (fn (i, B) => Thm.rule_attribute (fn _ => fn A => A RSN (i, B))));
   227 
   228 val OF_att =
   229   syntax (thms >> (fn Bs => Thm.rule_attribute (fn _ => fn A => Bs MRS A)));
   230 
   231 
   232 (* rename_abs *)
   233 
   234 val rename_abs = syntax
   235   (Scan.lift (Scan.repeat (Args.maybe Args.name) >> (apsnd o Drule.rename_bvars')));
   236 
   237 
   238 (* unfold / fold definitions *)
   239 
   240 fun unfolded_syntax rule =
   241   syntax (thms >>
   242     (fn ths => Thm.rule_attribute (fn context => rule (Context.proof_of context) ths)));
   243 
   244 val unfolded = unfolded_syntax LocalDefs.unfold;
   245 val folded = unfolded_syntax LocalDefs.fold;
   246 
   247 
   248 (* rule cases *)
   249 
   250 val consumes = syntax (Scan.lift (Scan.optional Args.nat 1) >> RuleCases.consumes);
   251 val case_names = syntax (Scan.lift (Scan.repeat1 Args.name) >> RuleCases.case_names);
   252 val case_conclusion =
   253   syntax (Scan.lift (Args.name -- Scan.repeat Args.name) >> RuleCases.case_conclusion);
   254 val params = syntax (Args.and_list1 (Scan.lift (Scan.repeat Args.name)) >> RuleCases.params);
   255 
   256 
   257 (* rule format *)
   258 
   259 val rule_format = syntax (Args.mode "no_asm"
   260   >> (fn true => ObjectLogic.rule_format_no_asm | false => ObjectLogic.rule_format));
   261 
   262 val elim_format = no_args (Thm.rule_attribute (K Tactic.make_elim));
   263 
   264 
   265 (* misc rules *)
   266 
   267 val standard = no_args (Thm.rule_attribute (K Drule.standard));
   268 
   269 val no_vars = no_args (Thm.rule_attribute (fn context => fn th =>
   270   let
   271     val ctxt = Variable.set_body false (Context.proof_of context);
   272     val ((_, [th']), _) = Variable.import_thms true [th] ctxt;
   273   in th' end));
   274 
   275 val eta_long =
   276   no_args (Thm.rule_attribute (K (Conv.fconv_rule Drule.eta_long_conversion)));
   277 
   278 val rotated = syntax
   279   (Scan.lift (Scan.optional Args.int 1) >> (fn n => Thm.rule_attribute (K (rotate_prems n))));
   280 
   281 
   282 (* theory setup *)
   283 
   284 val _ = Context.>> (Context.map_theory
   285  (add_attributes
   286    [("attribute", internal_att, "internal attribute"),
   287     ("tagged", tagged, "tagged theorem"),
   288     ("untagged", untagged, "untagged theorem"),
   289     ("kind", kind, "theorem kind"),
   290     ("COMP", COMP_att, "direct composition with rules (no lifting)"),
   291     ("THEN", THEN_att, "resolution with rule"),
   292     ("OF", OF_att, "rule applied to facts"),
   293     ("rename_abs", rename_abs, "rename bound variables in abstractions"),
   294     ("unfolded", unfolded, "unfolded definitions"),
   295     ("folded", folded, "folded definitions"),
   296     ("standard", standard, "result put into standard form"),
   297     ("elim_format", elim_format, "destruct rule turned into elimination rule format"),
   298     ("no_vars", no_vars, "frozen schematic vars"),
   299     ("eta_long", eta_long, "put theorem into eta long beta normal form"),
   300     ("consumes", consumes, "number of consumed facts"),
   301     ("case_names", case_names, "named rule cases"),
   302     ("case_conclusion", case_conclusion, "named conclusion of rule cases"),
   303     ("params", params, "named rule parameters"),
   304     ("atomize", no_args ObjectLogic.declare_atomize, "declaration of atomize rule"),
   305     ("rulify", no_args ObjectLogic.declare_rulify, "declaration of rulify rule"),
   306     ("rule_format", rule_format, "result put into standard rule format"),
   307     ("rotated", rotated, "rotated theorem premises"),
   308     ("defn", add_del_args LocalDefs.defn_add LocalDefs.defn_del,
   309       "declaration of definitional transformations")]));
   310 
   311 
   312 
   313 (** configuration options **)
   314 
   315 (* naming *)
   316 
   317 structure Configs = TheoryDataFun
   318 (
   319   type T = Config.value Config.T Symtab.table;
   320   val empty = Symtab.empty;
   321   val copy = I;
   322   val extend = I;
   323   fun merge _ = Symtab.merge (K true);
   324 );
   325 
   326 fun print_configs ctxt =
   327   let
   328     val thy = ProofContext.theory_of ctxt;
   329     fun prt (name, config) =
   330       let val value = Config.get ctxt config in
   331         Pretty.block [Pretty.str (name ^ ": " ^ Config.print_type value ^ " ="), Pretty.brk 1,
   332           Pretty.str (Config.print_value value)]
   333       end;
   334     val configs = NameSpace.extern_table (#1 (Attributes.get thy), Configs.get thy);
   335   in Pretty.writeln (Pretty.big_list "configuration options" (map prt configs)) end;
   336 
   337 
   338 (* concrete syntax *)
   339 
   340 local
   341 
   342 val equals = Args.$$$ "=";
   343 
   344 fun scan_value (Config.Bool _) =
   345       equals -- Args.$$$ "false" >> K (Config.Bool false) ||
   346       equals -- Args.$$$ "true" >> K (Config.Bool true) ||
   347       Scan.succeed (Config.Bool true)
   348   | scan_value (Config.Int _) = equals |-- Args.int >> Config.Int
   349   | scan_value (Config.String _) = equals |-- Args.name >> Config.String;
   350 
   351 fun scan_config thy config =
   352   let val config_type = Config.get_thy thy config
   353   in scan_value config_type >> (K o Thm.declaration_attribute o K o Config.put_generic config) end;
   354 
   355 in
   356 
   357 fun register_config config thy =
   358   let
   359     val bname = Config.name_of config;
   360     val name = Sign.full_name thy bname;
   361   in
   362     thy
   363     |> add_attributes [(bname, syntax (Scan.lift (scan_config thy config) >> Morphism.form),
   364       "configuration option")]
   365     |> Configs.map (Symtab.update (name, config))
   366   end;
   367 
   368 fun declare_config make coerce global name default =
   369   let
   370     val config_value = Config.declare global name (make default);
   371     val config = coerce config_value;
   372   in (config, register_config config_value) end;
   373 
   374 val config_bool   = declare_config Config.Bool Config.bool false;
   375 val config_int    = declare_config Config.Int Config.int false;
   376 val config_string = declare_config Config.String Config.string false;
   377 
   378 val config_bool_global   = declare_config Config.Bool Config.bool true;
   379 val config_int_global    = declare_config Config.Int Config.int true;
   380 val config_string_global = declare_config Config.String Config.string true;
   381 
   382 end;
   383 
   384 
   385 (* theory setup *)
   386 
   387 val _ = Context.>> (Context.map_theory
   388  (register_config Unify.trace_bound_value #>
   389   register_config Unify.search_bound_value #>
   390   register_config Unify.trace_simp_value #>
   391   register_config Unify.trace_types_value #>
   392   register_config MetaSimplifier.simp_depth_limit_value));
   393 
   394 end;
   395 
   396 structure BasicAttrib: BASIC_ATTRIB = Attrib;
   397 open BasicAttrib;