src/Pure/Isar/attrib.ML
author wenzelm
Mon Aug 04 20:27:39 2008 +0200 (2008-08-04)
changeset 27729 aaf08262b177
parent 26891 bfa1944e5238
child 27751 22c32eb18c23
permissions -rw-r--r--
tuned signature;
eliminated obsolete pervasives;
     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 ATTRIB =
     9 sig
    10   type src = Args.src
    11   val print_attributes: theory -> unit
    12   val intern: theory -> xstring -> string
    13   val intern_src: theory -> src -> src
    14   val pretty_attribs: Proof.context -> src list -> Pretty.T list
    15   val defined: theory -> string -> bool
    16   val attribute: theory -> src -> attribute
    17   val attribute_i: theory -> src -> attribute
    18   val eval_thms: Proof.context -> (Facts.ref * src list) list -> thm list
    19   val map_specs: ('a -> 'att) ->
    20     (('c * 'a list) * 'd) list -> (('c * 'att list) * 'd) list
    21   val map_facts: ('a -> 'att) ->
    22     (('c * 'a list) * ('d * 'a list) list) list ->
    23     (('c * 'att list) * ('d * 'att list) list) list
    24   val crude_closure: Proof.context -> src -> src
    25   val add_attributes: (bstring * (src -> attribute) * string) list -> theory -> theory
    26   val syntax: (Context.generic * Args.T list ->
    27     attribute * (Context.generic * Args.T list)) -> src -> attribute
    28   val no_args: attribute -> src -> attribute
    29   val add_del_args: attribute -> attribute -> src -> attribute
    30   val thm: Context.generic * Args.T list -> thm * (Context.generic * Args.T list)
    31   val thms: Context.generic * Args.T list -> thm list * (Context.generic * Args.T list)
    32   val multi_thm: Context.generic * Args.T list -> thm list * (Context.generic * Args.T list)
    33   val print_configs: Proof.context -> unit
    34   val internal: (morphism -> attribute) -> src
    35   val register_config: Config.value Config.T -> theory -> theory
    36   val config_bool: bstring -> bool -> bool Config.T * (theory -> theory)
    37   val config_int: bstring -> int -> int Config.T * (theory -> theory)
    38   val config_string: bstring -> string -> string Config.T * (theory -> theory)
    39   val config_bool_global: bstring -> bool -> bool Config.T * (theory -> theory)
    40   val config_int_global: bstring -> int -> int Config.T * (theory -> theory)
    41   val config_string_global: bstring -> string -> string Config.T * (theory -> theory)
    42 end;
    43 
    44 structure Attrib: ATTRIB =
    45 struct
    46 
    47 type src = Args.src;
    48 
    49 
    50 (** named attributes **)
    51 
    52 (* theory data *)
    53 
    54 structure Attributes = TheoryDataFun
    55 (
    56   type T = (((src -> attribute) * string) * stamp) NameSpace.table;
    57   val empty = NameSpace.empty_table;
    58   val copy = I;
    59   val extend = I;
    60   fun merge _ tables : T = NameSpace.merge_tables (eq_snd (op =)) tables handle Symtab.DUP dup =>
    61     error ("Attempt to merge different versions of attribute " ^ quote dup);
    62 );
    63 
    64 fun print_attributes thy =
    65   let
    66     val attribs = Attributes.get thy;
    67     fun prt_attr (name, ((_, comment), _)) = Pretty.block
    68       [Pretty.str (name ^ ":"), Pretty.brk 2, Pretty.str comment];
    69   in
    70     [Pretty.big_list "attributes:" (map prt_attr (NameSpace.extern_table attribs))]
    71     |> Pretty.chunks |> Pretty.writeln
    72   end;
    73 
    74 
    75 (* name space *)
    76 
    77 val intern = NameSpace.intern o #1 o Attributes.get;
    78 val intern_src = Args.map_name o intern;
    79 
    80 val extern = NameSpace.extern o #1 o Attributes.get o ProofContext.theory_of;
    81 
    82 
    83 (* pretty printing *)
    84 
    85 fun pretty_attribs _ [] = []
    86   | pretty_attribs ctxt srcs =
    87       [Pretty.enclose "[" "]"
    88         (Pretty.commas (map (Args.pretty_src ctxt o Args.map_name (extern ctxt)) srcs))];
    89 
    90 
    91 (* get attributes *)
    92 
    93 val defined = Symtab.defined o #2 o Attributes.get;
    94 
    95 fun attribute_i thy =
    96   let
    97     val attrs = #2 (Attributes.get thy);
    98     fun attr src =
    99       let val ((name, _), pos) = Args.dest_src src in
   100         (case Symtab.lookup attrs name of
   101           NONE => error ("Unknown attribute: " ^ quote name ^ Position.str_of pos)
   102         | SOME ((att, _), _) => att src)
   103       end;
   104   in attr end;
   105 
   106 fun attribute thy = attribute_i thy o intern_src thy;
   107 
   108 fun eval_thms ctxt args = ProofContext.note_thmss Thm.theoremK
   109     [(("", []), map (apsnd (map (attribute (ProofContext.theory_of ctxt)))) args)] ctxt
   110   |> fst |> maps snd;
   111 
   112 
   113 (* attributed declarations *)
   114 
   115 fun map_specs f = map (apfst (apsnd (map f)));
   116 fun map_facts f = map (apfst (apsnd (map f)) o apsnd (map (apsnd (map f))));
   117 
   118 
   119 (* crude_closure *)
   120 
   121 (*Produce closure without knowing facts in advance! The following
   122   works reasonably well for attribute parsers that do not peek at the
   123   thm structure.*)
   124 
   125 fun crude_closure ctxt src =
   126  (try (fn () => attribute_i (ProofContext.theory_of ctxt) src
   127     (Context.Proof ctxt, Drule.asm_rl)) ();
   128   Args.closure src);
   129 
   130 
   131 (* add_attributes *)
   132 
   133 fun add_attributes raw_attrs thy =
   134   let
   135     val new_attrs =
   136       raw_attrs |> map (fn (name, att, comment) => (name, ((att, comment), stamp ())));
   137     fun add attrs = NameSpace.extend_table (Sign.naming_of thy) new_attrs attrs
   138       handle Symtab.DUP dup => error ("Duplicate declaration of attributes " ^ quote dup);
   139   in Attributes.map add thy end;
   140 
   141 
   142 (* attribute syntax *)
   143 
   144 fun syntax scan src (st, th) =
   145   let val (f: attribute, st') = Args.syntax "attribute" scan src st
   146   in f (st', th) end;
   147 
   148 fun no_args x = syntax (Scan.succeed x);
   149 
   150 fun add_del_args add del = syntax
   151   (Scan.lift (Args.add >> K add || Args.del >> K del || Scan.succeed add));
   152 
   153 
   154 
   155 (** parsing attributed theorems **)
   156 
   157 local
   158 
   159 val fact_name = Args.internal_fact >> K "<fact>" || Args.name;
   160 
   161 fun gen_thm pick = Scan.depend (fn context =>
   162   let
   163     val thy = Context.theory_of context;
   164     val get = Context.cases (PureThy.get_fact context) ProofContext.get_fact context;
   165     val get_fact = get o Facts.Fact;
   166     val get_named = get o Facts.named;
   167   in
   168     Args.$$$ "[" |-- Args.attribs (intern thy) --| Args.$$$ "]" >> (fn srcs =>
   169       let
   170         val atts = map (attribute_i thy) srcs;
   171         val (context', th') = Library.apply atts (context, Drule.dummy_thm);
   172       in (context', pick "" [th']) end)
   173     ||
   174     (Scan.ahead Args.alt_name -- Args.named_fact get_fact
   175       >> (fn (s, fact) => ("", Facts.Fact s, fact))
   176     || Scan.ahead fact_name -- Args.position (Args.named_fact get_named) -- Scan.option Args.thm_sel
   177       >> (fn ((name, (fact, pos)), sel) => (name, Facts.Named ((name, pos), sel), fact)))
   178     -- Args.opt_attribs (intern thy) >> (fn ((name, thmref, fact), srcs) =>
   179       let
   180         val ths = Facts.select thmref fact;
   181         val atts = map (attribute_i thy) srcs;
   182         val (context', ths') = foldl_map (Library.apply atts) (context, ths);
   183       in (context', pick name ths') end)
   184   end);
   185 
   186 in
   187 
   188 val thm = gen_thm Facts.the_single;
   189 val multi_thm = gen_thm (K I);
   190 val thms = Scan.repeat multi_thm >> flat;
   191 
   192 end;
   193 
   194 
   195 
   196 (** basic attributes **)
   197 
   198 (* internal *)
   199 
   200 fun internal att = Args.src (("Pure.attribute", [Args.mk_attribute att]), Position.none);
   201 
   202 val internal_att =
   203   syntax (Scan.lift Args.internal_attribute >> Morphism.form);
   204 
   205 
   206 (* tags *)
   207 
   208 val tagged = syntax (Scan.lift (Args.name -- Args.name) >> PureThy.tag);
   209 val untagged = syntax (Scan.lift Args.name >> PureThy.untag);
   210 
   211 val kind = syntax (Scan.lift Args.name >> PureThy.kind);
   212 
   213 
   214 (* rule composition *)
   215 
   216 val COMP_att =
   217   syntax (Scan.lift (Scan.optional (Args.bracks Args.nat) 1) -- thm
   218     >> (fn (i, B) => Thm.rule_attribute (fn _ => fn A => Drule.compose_single (A, i, B))));
   219 
   220 val THEN_att =
   221   syntax (Scan.lift (Scan.optional (Args.bracks Args.nat) 1) -- thm
   222     >> (fn (i, B) => Thm.rule_attribute (fn _ => fn A => A RSN (i, B))));
   223 
   224 val OF_att =
   225   syntax (thms >> (fn Bs => Thm.rule_attribute (fn _ => fn A => Bs MRS A)));
   226 
   227 
   228 (* rename_abs *)
   229 
   230 val rename_abs = syntax
   231   (Scan.lift (Scan.repeat (Args.maybe Args.name) >> (apsnd o Drule.rename_bvars')));
   232 
   233 
   234 (* unfold / fold definitions *)
   235 
   236 fun unfolded_syntax rule =
   237   syntax (thms >>
   238     (fn ths => Thm.rule_attribute (fn context => rule (Context.proof_of context) ths)));
   239 
   240 val unfolded = unfolded_syntax LocalDefs.unfold;
   241 val folded = unfolded_syntax LocalDefs.fold;
   242 
   243 
   244 (* rule cases *)
   245 
   246 val consumes = syntax (Scan.lift (Scan.optional Args.nat 1) >> RuleCases.consumes);
   247 val case_names = syntax (Scan.lift (Scan.repeat1 Args.name) >> RuleCases.case_names);
   248 val case_conclusion =
   249   syntax (Scan.lift (Args.name -- Scan.repeat Args.name) >> RuleCases.case_conclusion);
   250 val params = syntax (Args.and_list1 (Scan.lift (Scan.repeat Args.name)) >> RuleCases.params);
   251 
   252 
   253 (* rule format *)
   254 
   255 val rule_format = syntax (Args.mode "no_asm"
   256   >> (fn true => ObjectLogic.rule_format_no_asm | false => ObjectLogic.rule_format));
   257 
   258 val elim_format = no_args (Thm.rule_attribute (K Tactic.make_elim));
   259 
   260 
   261 (* misc rules *)
   262 
   263 val standard = no_args (Thm.rule_attribute (K Drule.standard));
   264 
   265 val no_vars = no_args (Thm.rule_attribute (fn context => fn th =>
   266   let
   267     val ctxt = Variable.set_body false (Context.proof_of context);
   268     val ((_, [th']), _) = Variable.import_thms true [th] ctxt;
   269   in th' end));
   270 
   271 val eta_long =
   272   no_args (Thm.rule_attribute (K (Conv.fconv_rule Drule.eta_long_conversion)));
   273 
   274 val rotated = syntax
   275   (Scan.lift (Scan.optional Args.int 1) >> (fn n => Thm.rule_attribute (K (rotate_prems n))));
   276 
   277 
   278 (* theory setup *)
   279 
   280 val _ = Context.>> (Context.map_theory
   281  (add_attributes
   282    [("attribute", internal_att, "internal attribute"),
   283     ("tagged", tagged, "tagged theorem"),
   284     ("untagged", untagged, "untagged theorem"),
   285     ("kind", kind, "theorem kind"),
   286     ("COMP", COMP_att, "direct composition with rules (no lifting)"),
   287     ("THEN", THEN_att, "resolution with rule"),
   288     ("OF", OF_att, "rule applied to facts"),
   289     ("rename_abs", rename_abs, "rename bound variables in abstractions"),
   290     ("unfolded", unfolded, "unfolded definitions"),
   291     ("folded", folded, "folded definitions"),
   292     ("standard", standard, "result put into standard form"),
   293     ("elim_format", elim_format, "destruct rule turned into elimination rule format"),
   294     ("no_vars", no_vars, "frozen schematic vars"),
   295     ("eta_long", eta_long, "put theorem into eta long beta normal form"),
   296     ("consumes", consumes, "number of consumed facts"),
   297     ("case_names", case_names, "named rule cases"),
   298     ("case_conclusion", case_conclusion, "named conclusion of rule cases"),
   299     ("params", params, "named rule parameters"),
   300     ("atomize", no_args ObjectLogic.declare_atomize, "declaration of atomize rule"),
   301     ("rulify", no_args ObjectLogic.declare_rulify, "declaration of rulify rule"),
   302     ("rule_format", rule_format, "result put into standard rule format"),
   303     ("rotated", rotated, "rotated theorem premises"),
   304     ("defn", add_del_args LocalDefs.defn_add LocalDefs.defn_del,
   305       "declaration of definitional transformations")]));
   306 
   307 
   308 
   309 (** configuration options **)
   310 
   311 (* naming *)
   312 
   313 structure Configs = TheoryDataFun
   314 (
   315   type T = Config.value Config.T Symtab.table;
   316   val empty = Symtab.empty;
   317   val copy = I;
   318   val extend = I;
   319   fun merge _ = Symtab.merge (K true);
   320 );
   321 
   322 fun print_configs ctxt =
   323   let
   324     val thy = ProofContext.theory_of ctxt;
   325     fun prt (name, config) =
   326       let val value = Config.get ctxt config in
   327         Pretty.block [Pretty.str (name ^ ": " ^ Config.print_type value ^ " ="), Pretty.brk 1,
   328           Pretty.str (Config.print_value value)]
   329       end;
   330     val configs = NameSpace.extern_table (#1 (Attributes.get thy), Configs.get thy);
   331   in Pretty.writeln (Pretty.big_list "configuration options" (map prt configs)) end;
   332 
   333 
   334 (* concrete syntax *)
   335 
   336 local
   337 
   338 val equals = Args.$$$ "=";
   339 
   340 fun scan_value (Config.Bool _) =
   341       equals -- Args.$$$ "false" >> K (Config.Bool false) ||
   342       equals -- Args.$$$ "true" >> K (Config.Bool true) ||
   343       Scan.succeed (Config.Bool true)
   344   | scan_value (Config.Int _) = equals |-- Args.int >> Config.Int
   345   | scan_value (Config.String _) = equals |-- Args.name >> Config.String;
   346 
   347 fun scan_config thy config =
   348   let val config_type = Config.get_thy thy config
   349   in scan_value config_type >> (K o Thm.declaration_attribute o K o Config.put_generic config) end;
   350 
   351 in
   352 
   353 fun register_config config thy =
   354   let
   355     val bname = Config.name_of config;
   356     val name = Sign.full_name thy bname;
   357   in
   358     thy
   359     |> add_attributes [(bname, syntax (Scan.lift (scan_config thy config) >> Morphism.form),
   360       "configuration option")]
   361     |> Configs.map (Symtab.update (name, config))
   362   end;
   363 
   364 fun declare_config make coerce global name default =
   365   let
   366     val config_value = Config.declare global name (make default);
   367     val config = coerce config_value;
   368   in (config, register_config config_value) end;
   369 
   370 val config_bool   = declare_config Config.Bool Config.bool false;
   371 val config_int    = declare_config Config.Int Config.int false;
   372 val config_string = declare_config Config.String Config.string false;
   373 
   374 val config_bool_global   = declare_config Config.Bool Config.bool true;
   375 val config_int_global    = declare_config Config.Int Config.int true;
   376 val config_string_global = declare_config Config.String Config.string true;
   377 
   378 end;
   379 
   380 
   381 (* theory setup *)
   382 
   383 val _ = Context.>> (Context.map_theory
   384  (register_config Unify.trace_bound_value #>
   385   register_config Unify.search_bound_value #>
   386   register_config Unify.trace_simp_value #>
   387   register_config Unify.trace_types_value #>
   388   register_config MetaSimplifier.simp_depth_limit_value));
   389 
   390 end;