src/Pure/Isar/attrib.ML
author wenzelm
Fri Mar 28 20:02:04 2008 +0100 (2008-03-28)
changeset 26463 9283b4185fdf
parent 26435 bdce320cd426
child 26685 40aefd1e8f05
permissions -rw-r--r--
Context.>> : operate on Context.generic;
     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 attribute: theory -> src -> attribute
    21   val attribute_i: theory -> src -> attribute
    22   val eval_thms: Proof.context -> (Facts.ref * src list) list -> thm list
    23   val map_specs: ('a -> 'att) ->
    24     (('c * 'a list) * 'd) list -> (('c * 'att list) * 'd) list
    25   val map_facts: ('a -> 'att) ->
    26     (('c * 'a list) * ('d * 'a list) list) list ->
    27     (('c * 'att list) * ('d * 'att list) list) list
    28   val crude_closure: Proof.context -> src -> src
    29   val add_attributes: (bstring * (src -> attribute) * string) list -> theory -> theory
    30   val syntax: (Context.generic * Args.T list ->
    31     attribute * (Context.generic * Args.T list)) -> src -> attribute
    32   val no_args: attribute -> src -> attribute
    33   val add_del_args: attribute -> attribute -> src -> attribute
    34   val thm: Context.generic * Args.T list -> thm * (Context.generic * Args.T list)
    35   val thms: Context.generic * Args.T list -> thm list * (Context.generic * Args.T list)
    36   val multi_thm: Context.generic * Args.T list -> thm list * (Context.generic * Args.T list)
    37   val print_configs: Proof.context -> unit
    38   val internal: (morphism -> attribute) -> src
    39   val register_config: Config.value Config.T -> theory -> theory
    40   val config_bool: bstring -> bool -> bool Config.T * (theory -> theory)
    41   val config_int: bstring -> int -> int Config.T * (theory -> theory)
    42   val config_string: bstring -> string -> string Config.T * (theory -> theory)
    43   val config_bool_global: bstring -> bool -> bool Config.T * (theory -> theory)
    44   val config_int_global: bstring -> int -> int Config.T * (theory -> theory)
    45   val config_string_global: bstring -> string -> string Config.T * (theory -> theory)
    46 end;
    47 
    48 structure Attrib: ATTRIB =
    49 struct
    50 
    51 type src = Args.src;
    52 
    53 (** named attributes **)
    54 
    55 (* theory data *)
    56 
    57 structure Attributes = TheoryDataFun
    58 (
    59   type T = (((src -> attribute) * string) * stamp) NameSpace.table;
    60   val empty = NameSpace.empty_table;
    61   val copy = I;
    62   val extend = I;
    63   fun merge _ tables : T = NameSpace.merge_tables (eq_snd (op =)) tables handle Symtab.DUP dup =>
    64     error ("Attempt to merge different versions of attribute " ^ quote dup);
    65 );
    66 
    67 fun print_attributes thy =
    68   let
    69     val attribs = Attributes.get thy;
    70     fun prt_attr (name, ((_, comment), _)) = Pretty.block
    71       [Pretty.str (name ^ ":"), Pretty.brk 2, Pretty.str comment];
    72   in
    73     [Pretty.big_list "attributes:" (map prt_attr (NameSpace.extern_table attribs))]
    74     |> Pretty.chunks |> Pretty.writeln
    75   end;
    76 
    77 
    78 (* name space *)
    79 
    80 val intern = NameSpace.intern o #1 o Attributes.get;
    81 val intern_src = Args.map_name o intern;
    82 
    83 val extern = NameSpace.extern o #1 o Attributes.get o ProofContext.theory_of;
    84 
    85 
    86 (* pretty printing *)
    87 
    88 fun pretty_attribs _ [] = []
    89   | pretty_attribs ctxt srcs =
    90       [Pretty.enclose "[" "]"
    91         (Pretty.commas (map (Args.pretty_src ctxt o Args.map_name (extern ctxt)) srcs))];
    92 
    93 
    94 (* get attributes *)
    95 
    96 fun attribute_i thy =
    97   let
    98     val attrs = #2 (Attributes.get thy);
    99     fun attr src =
   100       let val ((name, _), pos) = Args.dest_src src in
   101         (case Symtab.lookup attrs name of
   102           NONE => error ("Unknown attribute: " ^ quote name ^ Position.str_of pos)
   103         | SOME ((att, _), _) => att src)
   104       end;
   105   in attr end;
   106 
   107 fun attribute thy = attribute_i thy o intern_src thy;
   108 
   109 fun eval_thms ctxt args = ProofContext.note_thmss Thm.theoremK
   110   [(("", []), map (apsnd (map (attribute (ProofContext.theory_of ctxt)))) args)] ctxt
   111   |> (flat o map snd o fst);
   112 
   113 
   114 (* attributed declarations *)
   115 
   116 fun map_specs f = map (apfst (apsnd (map f)));
   117 fun map_facts f = map (apfst (apsnd (map f)) o apsnd (map (apsnd (map f))));
   118 
   119 
   120 (* crude_closure *)
   121 
   122 (*Produce closure without knowing facts in advance! The following
   123   works reasonably well for attribute parsers that do not peek at the
   124   thm structure.*)
   125 
   126 fun crude_closure ctxt src =
   127  (try (fn () => attribute_i (ProofContext.theory_of ctxt) src
   128     (Context.Proof ctxt, Drule.asm_rl)) ();
   129   Args.closure src);
   130 
   131 
   132 (* add_attributes *)
   133 
   134 fun add_attributes raw_attrs thy =
   135   let
   136     val new_attrs =
   137       raw_attrs |> map (fn (name, att, comment) => (name, ((att, comment), stamp ())));
   138     fun add attrs = NameSpace.extend_table (Sign.naming_of thy) new_attrs attrs
   139       handle Symtab.DUP dup => error ("Duplicate declaration of attributes " ^ quote dup);
   140   in Attributes.map add thy end;
   141 
   142 
   143 (* attribute syntax *)
   144 
   145 fun syntax scan src (st, th) =
   146   let val (f: attribute, st') = Args.syntax "attribute" scan src st
   147   in f (st', th) end;
   148 
   149 fun no_args x = syntax (Scan.succeed x);
   150 
   151 fun add_del_args add del = syntax
   152   (Scan.lift (Args.add >> K add || Args.del >> K del || Scan.succeed add));
   153 
   154 
   155 
   156 (** parsing attributed theorems **)
   157 
   158 local
   159 
   160 val fact_name = Args.internal_fact >> K "<fact>" || Args.name;
   161 
   162 fun gen_thm pick = Scan.depend (fn context =>
   163   let
   164     val thy = Context.theory_of context;
   165     val get = Context.cases PureThy.get_fact ProofContext.get_fact context;
   166     val get_fact = get o Facts.Fact;
   167     val get_named = get o Facts.named;
   168   in
   169     Args.$$$ "[" |-- Args.attribs (intern thy) --| Args.$$$ "]" >> (fn srcs =>
   170       let
   171         val atts = map (attribute_i thy) srcs;
   172         val (context', th') = Library.apply atts (context, Drule.dummy_thm);
   173       in (context', pick "" [th']) end)
   174     ||
   175     (Scan.ahead Args.alt_name -- Args.named_fact get_fact
   176       >> (fn (s, fact) => ("", Facts.Fact s, fact))
   177     || Scan.ahead fact_name -- Args.position (Args.named_fact get_named) -- Scan.option Args.thm_sel
   178       >> (fn ((name, (fact, pos)), sel) => (name, Facts.Named ((name, pos), sel), fact)))
   179     -- Args.opt_attribs (intern thy) >> (fn ((name, thmref, fact), srcs) =>
   180       let
   181         val ths = Facts.select thmref fact;
   182         val atts = map (attribute_i thy) srcs;
   183         val (context', ths') = foldl_map (Library.apply atts) (context, ths);
   184       in (context', pick name ths') end)
   185   end);
   186 
   187 in
   188 
   189 val thm = gen_thm Facts.the_single;
   190 val multi_thm = gen_thm (K I);
   191 val thms = Scan.repeat multi_thm >> flat;
   192 
   193 end;
   194 
   195 
   196 
   197 (** basic attributes **)
   198 
   199 (* internal *)
   200 
   201 fun internal att = Args.src (("Pure.attribute", [Args.mk_attribute att]), Position.none);
   202 
   203 val internal_att =
   204   syntax (Scan.lift Args.internal_attribute >> Morphism.form);
   205 
   206 
   207 (* tags *)
   208 
   209 val tagged = syntax (Scan.lift (Args.name -- Args.name) >> PureThy.tag);
   210 val untagged = syntax (Scan.lift Args.name >> PureThy.untag);
   211 
   212 val kind = syntax (Scan.lift Args.name >> PureThy.kind);
   213 
   214 
   215 (* rule composition *)
   216 
   217 val COMP_att =
   218   syntax (Scan.lift (Scan.optional (Args.bracks Args.nat) 1) -- thm
   219     >> (fn (i, B) => Thm.rule_attribute (fn _ => fn A => Drule.compose_single (A, i, B))));
   220 
   221 val THEN_att =
   222   syntax (Scan.lift (Scan.optional (Args.bracks Args.nat) 1) -- thm
   223     >> (fn (i, B) => Thm.rule_attribute (fn _ => fn A => A RSN (i, B))));
   224 
   225 val OF_att =
   226   syntax (thms >> (fn Bs => Thm.rule_attribute (fn _ => fn A => Bs MRS A)));
   227 
   228 
   229 (* rename_abs *)
   230 
   231 val rename_abs = syntax
   232   (Scan.lift (Scan.repeat (Args.maybe Args.name) >> (apsnd o Drule.rename_bvars')));
   233 
   234 
   235 (* unfold / fold definitions *)
   236 
   237 fun unfolded_syntax rule =
   238   syntax (thms >>
   239     (fn ths => Thm.rule_attribute (fn context => rule (Context.proof_of context) ths)));
   240 
   241 val unfolded = unfolded_syntax LocalDefs.unfold;
   242 val folded = unfolded_syntax LocalDefs.fold;
   243 
   244 
   245 (* rule cases *)
   246 
   247 val consumes = syntax (Scan.lift (Scan.optional Args.nat 1) >> RuleCases.consumes);
   248 val case_names = syntax (Scan.lift (Scan.repeat1 Args.name) >> RuleCases.case_names);
   249 val case_conclusion =
   250   syntax (Scan.lift (Args.name -- Scan.repeat Args.name) >> RuleCases.case_conclusion);
   251 val params = syntax (Args.and_list1 (Scan.lift (Scan.repeat Args.name)) >> RuleCases.params);
   252 
   253 
   254 (* rule format *)
   255 
   256 val rule_format = syntax (Args.mode "no_asm"
   257   >> (fn true => ObjectLogic.rule_format_no_asm | false => ObjectLogic.rule_format));
   258 
   259 val elim_format = no_args (Thm.rule_attribute (K Tactic.make_elim));
   260 
   261 
   262 (* misc rules *)
   263 
   264 val standard = no_args (Thm.rule_attribute (K Drule.standard));
   265 
   266 val no_vars = no_args (Thm.rule_attribute (fn ctxt => fn th =>
   267   let val ((_, [th']), _) = Variable.import_thms true [th] (Context.proof_of ctxt)
   268   in th' end));
   269 
   270 val eta_long =
   271   no_args (Thm.rule_attribute (K (Conv.fconv_rule Drule.eta_long_conversion)));
   272 
   273 val rotated = syntax
   274   (Scan.lift (Scan.optional Args.int 1) >> (fn n => Thm.rule_attribute (K (rotate_prems n))));
   275 
   276 
   277 (* theory setup *)
   278 
   279 val _ = Context.>> (Context.map_theory
   280  (add_attributes
   281    [("attribute", internal_att, "internal attribute"),
   282     ("tagged", tagged, "tagged theorem"),
   283     ("untagged", untagged, "untagged theorem"),
   284     ("kind", kind, "theorem kind"),
   285     ("COMP", COMP_att, "direct composition with rules (no lifting)"),
   286     ("THEN", THEN_att, "resolution with rule"),
   287     ("OF", OF_att, "rule applied to facts"),
   288     ("rename_abs", rename_abs, "rename bound variables in abstractions"),
   289     ("unfolded", unfolded, "unfolded definitions"),
   290     ("folded", folded, "folded definitions"),
   291     ("standard", standard, "result put into standard form"),
   292     ("elim_format", elim_format, "destruct rule turned into elimination rule format"),
   293     ("no_vars", no_vars, "frozen schematic vars"),
   294     ("eta_long", eta_long, "put theorem into eta long beta normal form"),
   295     ("consumes", consumes, "number of consumed facts"),
   296     ("case_names", case_names, "named rule cases"),
   297     ("case_conclusion", case_conclusion, "named conclusion of rule cases"),
   298     ("params", params, "named rule parameters"),
   299     ("atomize", no_args ObjectLogic.declare_atomize, "declaration of atomize rule"),
   300     ("rulify", no_args ObjectLogic.declare_rulify, "declaration of rulify rule"),
   301     ("rule_format", rule_format, "result put into standard rule format"),
   302     ("rotated", rotated, "rotated theorem premises"),
   303     ("defn", add_del_args LocalDefs.defn_add LocalDefs.defn_del,
   304       "declaration of definitional transformations")]));
   305 
   306 
   307 
   308 (** configuration options **)
   309 
   310 (* naming *)
   311 
   312 structure Configs = TheoryDataFun
   313 (
   314   type T = Config.value Config.T Symtab.table;
   315   val empty = Symtab.empty;
   316   val copy = I;
   317   val extend = I;
   318   fun merge _ = Symtab.merge (K true);
   319 );
   320 
   321 fun print_configs ctxt =
   322   let
   323     val thy = ProofContext.theory_of ctxt;
   324     fun prt (name, config) =
   325       let val value = Config.get ctxt config in
   326         Pretty.block [Pretty.str (name ^ ": " ^ Config.print_type value ^ " ="), Pretty.brk 1,
   327           Pretty.str (Config.print_value value)]
   328       end;
   329     val configs = NameSpace.extern_table (#1 (Attributes.get thy), Configs.get thy);
   330   in Pretty.writeln (Pretty.big_list "configuration options" (map prt configs)) end;
   331 
   332 
   333 (* concrete syntax *)
   334 
   335 local
   336 
   337 val equals = Args.$$$ "=";
   338 
   339 fun scan_value (Config.Bool _) =
   340       equals -- Args.$$$ "false" >> K (Config.Bool false) ||
   341       equals -- Args.$$$ "true" >> K (Config.Bool true) ||
   342       Scan.succeed (Config.Bool true)
   343   | scan_value (Config.Int _) = equals |-- Args.int >> Config.Int
   344   | scan_value (Config.String _) = equals |-- Args.name >> Config.String;
   345 
   346 fun scan_config thy config =
   347   let val config_type = Config.get_thy thy config
   348   in scan_value config_type >> (K o Thm.declaration_attribute o K o Config.put_generic config) end;
   349 
   350 in
   351 
   352 fun register_config config thy =
   353   let
   354     val bname = Config.name_of config;
   355     val name = Sign.full_name thy bname;
   356   in
   357     thy
   358     |> add_attributes [(bname, syntax (Scan.lift (scan_config thy config) >> Morphism.form),
   359       "configuration option")]
   360     |> Configs.map (Symtab.update (name, config))
   361   end;
   362 
   363 fun declare_config make coerce global name default =
   364   let
   365     val config_value = Config.declare global name (make default);
   366     val config = coerce config_value;
   367   in (config, register_config config_value) end;
   368 
   369 val config_bool   = declare_config Config.Bool Config.bool false;
   370 val config_int    = declare_config Config.Int Config.int false;
   371 val config_string = declare_config Config.String Config.string false;
   372 
   373 val config_bool_global   = declare_config Config.Bool Config.bool true;
   374 val config_int_global    = declare_config Config.Int Config.int true;
   375 val config_string_global = declare_config Config.String Config.string true;
   376 
   377 end;
   378 
   379 
   380 (* theory setup *)
   381 
   382 val _ = Context.>> (Context.map_theory
   383  (register_config Unify.trace_bound_value #>
   384   register_config Unify.search_bound_value #>
   385   register_config Unify.trace_simp_value #>
   386   register_config Unify.trace_types_value #>
   387   register_config MetaSimplifier.simp_depth_limit_value));
   388 
   389 end;
   390 
   391 structure BasicAttrib: BASIC_ATTRIB = Attrib;
   392 open BasicAttrib;