src/Pure/Isar/local_theory.ML
author wenzelm
Sat Oct 13 17:16:44 2007 +0200 (2007-10-13 ago)
changeset 25021 8f00edb993bd
parent 24984 952045a8dcf2
child 25026 ecdc1733d3cc
permissions -rw-r--r--
renamed def to define;
abbrev: return hypothetical def;
     1 (*  Title:      Pure/Isar/local_theory.ML
     2     ID:         $Id$
     3     Author:     Makarius
     4 
     5 Local theory operations, with abstract target context.
     6 *)
     7 
     8 type local_theory = Proof.context;
     9 
    10 signature LOCAL_THEORY =
    11 sig
    12   type operations
    13   val target_of: local_theory -> Proof.context
    14   val raw_theory_result: (theory -> 'a * theory) -> local_theory -> 'a * local_theory
    15   val raw_theory: (theory -> theory) -> local_theory -> local_theory
    16   val full_naming: local_theory -> NameSpace.naming
    17   val full_name: local_theory -> bstring -> string
    18   val theory_result: (theory -> 'a * theory) -> local_theory -> 'a * local_theory
    19   val theory: (theory -> theory) -> local_theory -> local_theory
    20   val target_result: (Proof.context -> 'a * Proof.context) -> local_theory -> 'a * local_theory
    21   val target: (Proof.context -> Proof.context) -> local_theory -> local_theory
    22   val affirm: local_theory -> local_theory
    23   val pretty: local_theory -> Pretty.T list
    24   val axioms: string ->
    25     ((bstring * typ) * mixfix) list * ((bstring * Attrib.src list) * term list) list -> local_theory
    26     -> (term list * (bstring * thm list) list) * local_theory
    27   val abbrev: Syntax.mode -> (bstring * mixfix) * term -> local_theory ->
    28     (term * (bstring * thm)) * local_theory
    29   val define: string -> (bstring * mixfix) * ((bstring * Attrib.src list) * term) -> local_theory ->
    30     (term * (bstring * thm)) * local_theory
    31   val notes: string -> ((bstring * Attrib.src list) * (thm list * Attrib.src list) list) list ->
    32     local_theory -> (bstring * thm list) list * local_theory
    33   val type_syntax: declaration -> local_theory -> local_theory
    34   val term_syntax: declaration -> local_theory -> local_theory
    35   val declaration: declaration -> local_theory -> local_theory
    36   val note: string -> (bstring * Attrib.src list) * thm list ->
    37     local_theory -> (bstring * thm list) * local_theory
    38   val notation: bool -> Syntax.mode -> (term * mixfix) list -> local_theory -> local_theory
    39   val target_morphism: local_theory -> morphism
    40   val target_naming: local_theory -> NameSpace.naming
    41   val target_name: local_theory -> bstring -> string
    42   val init: string -> operations -> Proof.context -> local_theory
    43   val restore: local_theory -> local_theory
    44   val reinit: local_theory -> theory -> local_theory
    45   val exit: local_theory -> Proof.context
    46 end;
    47 
    48 structure LocalTheory: LOCAL_THEORY =
    49 struct
    50 
    51 (** local theory data **)
    52 
    53 (* type lthy *)
    54 
    55 type operations =
    56  {pretty: local_theory -> Pretty.T list,
    57   axioms: string ->
    58     ((bstring * typ) * mixfix) list * ((bstring * Attrib.src list) * term list) list -> local_theory
    59     -> (term list * (bstring * thm list) list) * local_theory,
    60   abbrev: Syntax.mode -> (bstring * mixfix) * term -> local_theory ->
    61     (term * (bstring * thm)) * local_theory,
    62   define: string -> (bstring * mixfix) * ((bstring * Attrib.src list) * term) -> local_theory ->
    63     (term * (bstring * thm)) * local_theory,
    64   notes: string ->
    65     ((bstring * Attrib.src list) * (thm list * Attrib.src list) list) list ->
    66     local_theory -> (bstring * thm list) list * local_theory,
    67   type_syntax: declaration -> local_theory -> local_theory,
    68   term_syntax: declaration -> local_theory -> local_theory,
    69   declaration: declaration -> local_theory -> local_theory,
    70   target_naming: local_theory -> NameSpace.naming,
    71   reinit: local_theory -> theory -> local_theory,
    72   exit: local_theory -> Proof.context};
    73 
    74 datatype lthy = LThy of
    75  {theory_prefix: string,
    76   operations: operations,
    77   target: Proof.context};
    78 
    79 fun make_lthy (theory_prefix, operations, target) =
    80   LThy {theory_prefix = theory_prefix, operations = operations, target = target};
    81 
    82 
    83 (* context data *)
    84 
    85 structure Data = ProofDataFun
    86 (
    87   type T = lthy option;
    88   fun init _ = NONE;
    89 );
    90 
    91 fun get_lthy lthy =
    92   (case Data.get lthy of
    93     NONE => error "No local theory context"
    94   | SOME (LThy data) => data);
    95 
    96 fun map_lthy f lthy =
    97   let val {theory_prefix, operations, target} = get_lthy lthy
    98   in Data.put (SOME (make_lthy (f (theory_prefix, operations, target)))) lthy end;
    99 
   100 val target_of = #target o get_lthy;
   101 val affirm = tap target_of;
   102 
   103 fun map_target f = map_lthy (fn (theory_prefix, operations, target) =>
   104   (theory_prefix, operations, f target));
   105 
   106 
   107 (* substructure mappings *)
   108 
   109 fun raw_theory_result f lthy =
   110   let
   111     val (res, thy') = f (ProofContext.theory_of lthy);
   112     val lthy' = lthy
   113       |> map_target (ProofContext.transfer thy')
   114       |> ProofContext.transfer thy';
   115   in (res, lthy') end;
   116 
   117 fun raw_theory f = #2 o raw_theory_result (f #> pair ());
   118 
   119 fun full_naming lthy =
   120   Sign.naming_of (ProofContext.theory_of lthy)
   121   |> NameSpace.sticky_prefix (#theory_prefix (get_lthy lthy))
   122   |> NameSpace.qualified_names;
   123 
   124 val full_name = NameSpace.full o full_naming;
   125 
   126 fun theory_result f lthy = lthy |> raw_theory_result (fn thy => thy
   127   |> Sign.sticky_prefix (#theory_prefix (get_lthy lthy))
   128   |> Sign.qualified_names
   129   |> f
   130   ||> Sign.restore_naming thy);
   131 
   132 fun theory f = #2 o theory_result (f #> pair ());
   133 
   134 fun target_result f lthy =
   135   let
   136     val (res, ctxt') = f (#target (get_lthy lthy));
   137     val thy' = ProofContext.theory_of ctxt';
   138     val lthy' = lthy
   139       |> map_target (K ctxt')
   140       |> ProofContext.transfer thy';
   141   in (res, lthy') end;
   142 
   143 fun target f = #2 o target_result (f #> pair ());
   144 
   145 
   146 (* basic operations *)
   147 
   148 fun operation f lthy = f (#operations (get_lthy lthy)) lthy;
   149 fun operation1 f x = operation (fn ops => f ops x);
   150 fun operation2 f x y = operation (fn ops => f ops x y);
   151 
   152 val pretty = operation #pretty;
   153 val axioms = operation2 #axioms;
   154 val abbrev = operation2 #abbrev;
   155 val define = operation2 #define;
   156 val notes = operation2 #notes;
   157 val type_syntax = operation1 #type_syntax;
   158 val term_syntax = operation1 #term_syntax;
   159 val declaration = operation1 #declaration;
   160 val target_naming = operation #target_naming;
   161 
   162 fun note kind (a, ths) lthy = lthy |> notes kind [(a, [(ths, [])])] |>> hd;
   163 
   164 fun target_morphism lthy =
   165   ProofContext.export_morphism lthy (target_of lthy) $>
   166   Morphism.thm_morphism Goal.norm_result;
   167 
   168 fun notation add mode raw_args lthy =
   169   let val args = map (apfst (Morphism.term (target_morphism lthy))) raw_args
   170   in term_syntax (ProofContext.target_notation add mode args) lthy end;
   171 
   172 val target_name = NameSpace.full o target_naming;
   173 
   174 
   175 (* init -- exit *)
   176 
   177 fun init theory_prefix operations target = target |> Data.map
   178   (fn NONE => SOME (make_lthy (theory_prefix, operations, target))
   179     | SOME _ => error "Local theory already initialized");
   180 
   181 fun restore lthy =
   182   let val {theory_prefix, operations, target} = get_lthy lthy
   183   in init theory_prefix operations target end;
   184 
   185 val reinit = operation #reinit;
   186 val exit = operation #exit;
   187 
   188 end;