src/Pure/Isar/named_target.ML
author wenzelm
Fri Oct 28 22:17:30 2011 +0200 (2011-10-28 ago)
changeset 45291 57cd50f98fdc
parent 45290 f599ac41e7f5
child 45293 57def0b39696
permissions -rw-r--r--
uniform Local_Theory.declaration with explicit params;
     1 (*  Title:      Pure/Isar/named_target.ML
     2     Author:     Makarius
     3     Author:     Florian Haftmann, TU Muenchen
     4 
     5 Targets for theory, locale and class.
     6 *)
     7 
     8 signature NAMED_TARGET =
     9 sig
    10   val init: (local_theory -> local_theory) -> string -> theory -> local_theory
    11   val theory_init: theory -> local_theory
    12   val reinit: local_theory -> local_theory -> local_theory
    13   val context_cmd: xstring -> theory -> local_theory
    14   val peek: local_theory -> {target: string, is_locale: bool, is_class: bool} option
    15 end;
    16 
    17 structure Named_Target: NAMED_TARGET =
    18 struct
    19 
    20 (* context data *)
    21 
    22 datatype target =
    23   Target of {target: string, is_locale: bool, is_class: bool,
    24     before_exit: local_theory -> local_theory};
    25 
    26 fun make_target target is_locale is_class before_exit =
    27   Target {target = target, is_locale = is_locale, is_class = is_class,
    28     before_exit = before_exit};
    29 
    30 fun named_target _ "" before_exit = make_target "" false false before_exit
    31   | named_target thy locale before_exit =
    32       if Locale.defined thy locale
    33       then make_target locale true (Class.is_class thy locale) before_exit
    34       else error ("No such locale: " ^ quote locale);
    35 
    36 structure Data = Proof_Data
    37 (
    38   type T = target option;
    39   fun init _ = NONE;
    40 );
    41 
    42 val peek =
    43   Data.get #> Option.map (fn Target {target, is_locale, is_class, ...} =>
    44     {target = target, is_locale = is_locale, is_class = is_class});
    45 
    46 
    47 (* generic declarations *)
    48 
    49 fun locale_declaration locale {syntax, pervasive} decl lthy =
    50   let
    51     val add = if syntax then Locale.add_syntax_declaration else Locale.add_declaration;
    52     val locale_decl = Morphism.transform (Local_Theory.target_morphism lthy) decl;
    53   in
    54     lthy
    55     |> pervasive ? Generic_Target.theory_declaration decl
    56     |> Local_Theory.target (add locale locale_decl)
    57   end;
    58 
    59 fun target_declaration (Target {target, ...}) params =
    60   if target = "" then Generic_Target.theory_declaration
    61   else locale_declaration target params;
    62 
    63 
    64 (* consts in locales *)
    65 
    66 fun locale_const (Target {target, is_class, ...}) (prmode as (mode, _)) ((b, mx), rhs) phi =
    67   let
    68     val b' = Morphism.binding phi b;
    69     val rhs' = Morphism.term phi rhs;
    70     val arg = (b', Term.close_schematic_term rhs');
    71     val same_shape = Term.aconv_untyped (rhs, rhs');
    72     (* FIXME workaround based on educated guess *)
    73     val prefix' = Binding.prefix_of b';
    74     val is_canonical_class = is_class andalso
    75       (Binding.eq_name (b, b')
    76         andalso not (null prefix')
    77         andalso List.last prefix' = (Class.class_prefix target, false)
    78       orelse same_shape);
    79   in
    80     not is_canonical_class ?
    81       (Context.mapping_result
    82         (Sign.add_abbrev Print_Mode.internal arg)
    83         (Proof_Context.add_abbrev Print_Mode.internal arg)
    84       #-> (fn (lhs' as Const (d, _), _) =>
    85           same_shape ?
    86             (Context.mapping
    87               (Sign.revert_abbrev mode d) (Proof_Context.revert_abbrev mode d) #>
    88              Morphism.form (Proof_Context.target_notation true prmode [(lhs', mx)]))))
    89   end;
    90 
    91 fun locale_const_declaration (ta as Target {target, ...}) prmode arg =
    92   locale_declaration target {syntax = true, pervasive = false} (locale_const ta prmode arg);
    93 
    94 
    95 (* define *)
    96 
    97 fun locale_foundation ta (((b, U), mx), (b_def, rhs)) (type_params, term_params) =
    98   Generic_Target.theory_foundation (((b, U), NoSyn), (b_def, rhs)) (type_params, term_params)
    99   #-> (fn (lhs, def) => locale_const_declaration ta Syntax.mode_default ((b, mx), lhs)
   100     #> pair (lhs, def))
   101 
   102 fun class_foundation (ta as Target {target, ...})
   103     (((b, U), mx), (b_def, rhs)) (type_params, term_params) =
   104   Generic_Target.theory_foundation (((b, U), NoSyn), (b_def, rhs)) (type_params, term_params)
   105   #-> (fn (lhs, def) => locale_const_declaration ta Syntax.mode_default ((b, NoSyn), lhs)
   106     #> Class.const target ((b, mx), (type_params, lhs))
   107     #> pair (lhs, def))
   108 
   109 fun target_foundation (ta as Target {is_locale, is_class, ...}) =
   110   if is_class then class_foundation ta
   111   else if is_locale then locale_foundation ta
   112   else Generic_Target.theory_foundation;
   113 
   114 
   115 (* notes *)
   116 
   117 fun locale_notes locale kind global_facts local_facts lthy =
   118   let
   119     val global_facts' = Attrib.map_facts (K I) global_facts;
   120     val local_facts' = Element.facts_map
   121       (Element.transform_ctxt (Local_Theory.target_morphism lthy)) local_facts;
   122   in
   123     lthy
   124     |> Local_Theory.background_theory (Global_Theory.note_thmss kind global_facts' #> snd)
   125     |> Local_Theory.target (Locale.add_thmss locale kind local_facts')
   126   end
   127 
   128 fun target_notes (Target {target, is_locale, ...}) =
   129   if is_locale then locale_notes target
   130   else fn kind => fn global_facts => fn _ => Generic_Target.theory_notes kind global_facts;
   131 
   132 
   133 (* abbrev *)
   134 
   135 fun locale_abbrev ta prmode ((b, mx), t) xs =
   136   Local_Theory.background_theory_result
   137     (Sign.add_abbrev Print_Mode.internal (b, t)) #->
   138       (fn (lhs, _) => locale_const_declaration ta prmode
   139         ((b, mx), Term.list_comb (Logic.unvarify_global lhs, xs)));
   140 
   141 fun target_abbrev (ta as Target {target, is_locale, is_class, ...})
   142     prmode (b, mx) (global_rhs, t') xs lthy =
   143   if is_locale then
   144     lthy
   145     |> locale_abbrev ta prmode ((b, if is_class then NoSyn else mx), global_rhs) xs
   146     |> is_class ? Class.abbrev target prmode ((b, mx), t')
   147   else
   148     lthy
   149     |> Generic_Target.theory_abbrev prmode ((b, mx), global_rhs);
   150 
   151 
   152 (* pretty *)
   153 
   154 fun pretty (Target {target, is_locale, is_class, ...}) ctxt =
   155   let
   156     val thy = Proof_Context.theory_of ctxt;
   157     val target_name =
   158       [Pretty.command (if is_class then "class" else "locale"),
   159         Pretty.str (" " ^ Locale.extern thy target)];
   160     val fixes = map (fn (x, T) => (Binding.name x, SOME T, NoSyn))
   161       (#1 (Proof_Context.inferred_fixes ctxt));
   162     val assumes = map (fn A => (Attrib.empty_binding, [(Thm.term_of A, [])]))
   163       (Assumption.all_assms_of ctxt);
   164     val elems =
   165       (if null fixes then [] else [Element.Fixes fixes]) @
   166       (if null assumes then [] else [Element.Assumes assumes]);
   167     val body_elems =
   168       if not is_locale then []
   169       else if null elems then [Pretty.block target_name]
   170       else [Pretty.block (Pretty.fbreaks (Pretty.block (target_name @ [Pretty.str " ="]) ::
   171         map (Pretty.chunks o Element.pretty_ctxt ctxt) elems))];
   172   in
   173     Pretty.block [Pretty.command "theory", Pretty.brk 1,
   174       Pretty.str (Context.theory_name (Proof_Context.theory_of ctxt))] :: body_elems
   175   end;
   176 
   177 
   178 (* init *)
   179 
   180 fun init_context (Target {target, is_locale, is_class, ...}) =
   181   if not is_locale then Proof_Context.init_global
   182   else if not is_class then Locale.init target
   183   else Class.init target;
   184 
   185 fun init before_exit target thy =
   186   let
   187     val ta = named_target thy target before_exit;
   188   in
   189     thy
   190     |> init_context ta
   191     |> Data.put (SOME ta)
   192     |> Local_Theory.init NONE (Long_Name.base_name target)
   193        {define = Generic_Target.define (target_foundation ta),
   194         notes = Generic_Target.notes (target_notes ta),
   195         abbrev = Generic_Target.abbrev (target_abbrev ta),
   196         declaration = target_declaration ta,
   197         pretty = pretty ta,
   198         exit = Local_Theory.target_of o before_exit}
   199   end;
   200 
   201 val theory_init = init I "";
   202 
   203 fun reinit lthy =
   204   (case Data.get lthy of
   205     SOME (Target {target, before_exit, ...}) => init before_exit target o Local_Theory.exit_global
   206   | NONE => error "Not in a named target");
   207 
   208 fun context_cmd "-" thy = init I "" thy
   209   | context_cmd target thy = init I (Locale.intern thy target) thy;
   210 
   211 end;