author  haftmann 
Mon, 02 Feb 2009 13:56:23 +0100  
changeset 29710  f2e70a0636b9 
parent 29576  669b560fc2b9 
child 29971  68331b62c873 
child 30240  5b25fee0362c 
permissions  rwrr 
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(* Title: Pure/Isar/theory_target.ML 
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Author: Makarius 

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Common theory/locale/class/instantiation/overloading targets. 
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*) 
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signature THEORY_TARGET = 

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sig 

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val peek: local_theory > {target: string, is_locale: bool, 
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is_class: bool, instantiation: string list * (string * sort) list * sort, 
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overloading: (string * (string * typ) * bool) list} 

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val init: string option > theory > local_theory 
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val begin: string > Proof.context > local_theory 
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val context: xstring > theory > local_theory 
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val instantiation: string list * (string * sort) list * sort > theory > local_theory 
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val instantiation_cmd: xstring list * sort * xstring > theory > local_theory 
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val overloading: (string * (string * typ) * bool) list > theory > local_theory 
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val overloading_cmd: (string * string * bool) list > theory > local_theory 
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end; 
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structure TheoryTarget: THEORY_TARGET = 

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struct 

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(* context data *) 
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datatype target = Target of {target: string, is_locale: bool, 
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is_class: bool, instantiation: string list * (string * sort) list * sort, 
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overloading: (string * (string * typ) * bool) list}; 

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fun make_target target is_locale is_class instantiation overloading = 
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Target {target = target, is_locale = is_locale, 

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is_class = is_class, instantiation = instantiation, overloading = overloading}; 
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val global_target = make_target "" false false ([], [], []) []; 
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structure Data = ProofDataFun 
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( 

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type T = target; 
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fun init _ = global_target; 
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); 
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val peek = (fn Target args => args) o Data.get; 
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(* pretty *) 
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fun pretty_thy ctxt target is_locale is_class = 
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let 
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val thy = ProofContext.theory_of ctxt; 

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val target_name = (if is_class then "class " else "locale ") ^ Locale.extern thy target; 
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val fixes = map (fn (x, T) => (Binding.name x, SOME T, NoSyn)) 
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(#1 (ProofContext.inferred_fixes ctxt)); 
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val assumes = map (fn A => (Attrib.empty_binding, [(Thm.term_of A, [])])) 
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(Assumption.assms_of ctxt); 
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val elems = 
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(if null fixes then [] else [Element.Fixes fixes]) @ 

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(if null assumes then [] else [Element.Assumes assumes]); 

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in 
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if target = "" then [] 
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else if null elems then [Pretty.str target_name] 
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else [Pretty.big_list (target_name ^ " =") 

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(map (Pretty.chunks o Element.pretty_ctxt ctxt) elems)] 

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end; 
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fun pretty (Target {target, is_locale, is_class, instantiation, overloading, ...}) ctxt = 
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Pretty.block [Pretty.str "theory", Pretty.brk 1, 
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Pretty.str (Context.theory_name (ProofContext.theory_of ctxt))] :: 

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(if not (null overloading) then [Overloading.pretty ctxt] 

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else if not (null (#1 instantiation)) then [Class_Target.pretty_instantiation ctxt] 
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else pretty_thy ctxt target is_locale is_class); 
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(* target declarations *) 
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fun target_decl add (Target {target, ...}) d lthy = 
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let 
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val d' = Morphism.transform (LocalTheory.target_morphism lthy) d; 
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val d0 = Morphism.form d'; 
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in 

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if target = "" then 
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lthy 
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> LocalTheory.theory (Context.theory_map d0) 

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> LocalTheory.target (Context.proof_map d0) 

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else 

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lthy 

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> LocalTheory.target (add target d') 
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end; 
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val type_syntax = target_decl Locale.add_type_syntax; 
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val term_syntax = target_decl Locale.add_term_syntax; 

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val declaration = target_decl Locale.add_declaration; 

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fun class_target (Target {target, ...}) f = 
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LocalTheory.raw_theory f #> 
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LocalTheory.target (Class_Target.refresh_syntax target); 
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(* notes *) 
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fun import_export_proof ctxt (name, raw_th) = 
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let 
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val thy = ProofContext.theory_of ctxt; 
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val thy_ctxt = ProofContext.init thy; 
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val certT = Thm.ctyp_of thy; 
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val cert = Thm.cterm_of thy; 
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(*export assumes/defines*) 
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val th = Goal.norm_result raw_th; 
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val (defs, th') = LocalDefs.export ctxt thy_ctxt th; 
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val concl_conv = MetaSimplifier.rewrite true defs (Thm.cprop_of th); 
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val assms = map (MetaSimplifier.rewrite_rule defs o Thm.assume) (Assumption.assms_of ctxt); 

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val nprems = Thm.nprems_of th'  Thm.nprems_of th; 
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(*export fixes*) 
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val tfrees = map TFree (Thm.fold_terms Term.add_tfrees th' []); 
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val frees = map Free (Thm.fold_terms Term.add_frees th' []); 

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val (th'' :: vs) = (th' :: map (Drule.mk_term o cert) (map Logic.mk_type tfrees @ frees)) 
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> Variable.export ctxt thy_ctxt 
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> Drule.zero_var_indexes_list; 
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(*thm definition*) 
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val result = PureThy.name_thm true true Position.none name th''; 
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(*import fixes*) 
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val (tvars, vars) = 
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chop (length tfrees) (map (Thm.term_of o Drule.dest_term) vs) 
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>> map Logic.dest_type; 
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val instT = map_filter (fn (TVar v, T) => SOME (v, T)  _ => NONE) (tvars ~~ tfrees); 
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val inst = filter (is_Var o fst) (vars ~~ frees); 
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val cinstT = map (pairself certT o apfst TVar) instT; 
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val cinst = map (pairself (cert o Term.map_types (TermSubst.instantiateT instT))) inst; 
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val result' = Thm.instantiate (cinstT, cinst) result; 
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(*import assumes/defines*) 
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val assm_tac = FIRST' (map (fn assm => Tactic.compose_tac (false, assm, 0)) assms); 
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val result'' = 
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(case SINGLE (Seq.INTERVAL assm_tac 1 nprems) result' of 
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NONE => raise THM ("Failed to reimport result", 0, [result']) 
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 SOME res => LocalDefs.trans_props ctxt [res, Thm.symmetric concl_conv]) 
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> Goal.norm_result 
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> PureThy.name_thm false false Position.none name; 
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in (result'', result) end; 
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fun note_local kind facts ctxt = 
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ctxt 

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> ProofContext.qualified_names 

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> ProofContext.note_thmss_i kind facts 

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> ProofContext.restore_naming ctxt; 

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fun notes (Target {target, is_locale, ...}) kind facts lthy = 
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let 
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val thy = ProofContext.theory_of lthy; 
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val facts' = facts 
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> map (fn (a, bs) => (a, PureThy.burrow_fact (PureThy.name_multi 
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(LocalTheory.full_name lthy (fst a))) bs)) 

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> PureThy.map_facts (import_export_proof lthy); 
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val local_facts = PureThy.map_facts #1 facts' 
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> Attrib.map_facts (Attrib.attribute_i thy); 
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val target_facts = PureThy.map_facts #1 facts' 
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> is_locale ? Element.facts_map (Element.morph_ctxt (LocalTheory.target_morphism lthy)); 
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val global_facts = PureThy.map_facts #2 facts' 
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> Attrib.map_facts (if is_locale then K I else Attrib.attribute_i thy); 
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in 
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lthy > LocalTheory.theory 
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(Sign.qualified_names 
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#> PureThy.note_thmss_grouped kind (LocalTheory.group_of lthy) global_facts #> snd 
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#> Sign.restore_naming thy) 
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> not is_locale ? LocalTheory.target (note_local kind global_facts #> snd) 
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> is_locale ? LocalTheory.target (Locale.add_thmss target kind target_facts) 
25684  172 
> note_local kind local_facts 
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end; 
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(* declare_const *) 
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fun fork_mixfix (Target {is_locale, is_class, ...}) mx = 
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if not is_locale then (NoSyn, NoSyn, mx) 
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else if not is_class then (NoSyn, mx, NoSyn) 
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else (mx, NoSyn, NoSyn); 
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fun locale_const (Target {target, is_class, ...}) (prmode as (mode, _)) tags ((b, mx), rhs) phi = 
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let 
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val b' = Morphism.binding phi b; 
24939  186 
val rhs' = Morphism.term phi rhs; 
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val legacy_arg = (b', Term.close_schematic_term (Logic.legacy_varify rhs')); 
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val arg = (b', Term.close_schematic_term rhs'); 

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val similar_body = Type.similar_types (rhs, rhs'); 
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(* FIXME workaround based on educated guess *) 
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val (prefix', _) = Binding.dest b'; 
29006  192 
val class_global = Binding.base_name b = Binding.base_name b' 
28861  193 
andalso not (null prefix') 
29358  194 
andalso (fst o snd o split_last) prefix' = Class_Target.class_prefix target; 
24939  195 
in 
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not (is_class andalso (similar_body orelse class_global)) ? 
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(Context.mapping_result 
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(fn thy => thy > 
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Sign.no_base_names 
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> Sign.add_abbrev PrintMode.internal tags legacy_arg 
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> Sign.restore_naming thy) 
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(ProofContext.add_abbrev PrintMode.internal tags arg) 
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#> (fn (lhs' as Const (d, _), _) => 
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similar_body ? 
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(Context.mapping (Sign.revert_abbrev mode d) (ProofContext.revert_abbrev mode d) #> 
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Morphism.form (ProofContext.target_notation true prmode [(lhs', mx)])))) 
24939  207 
end; 
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fun declare_const (ta as Target {target, is_locale, is_class, ...}) depends ((b, T), mx) lthy = 
24939  210 
let 
29006  211 
val c = Binding.base_name b; 
26132  212 
val tags = LocalTheory.group_position_of lthy; 
24939  213 
val xs = filter depends (#1 (ProofContext.inferred_fixes (LocalTheory.target_of lthy))); 
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val U = map #2 xs > T; 
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val (mx1, mx2, mx3) = fork_mixfix ta mx; 
25519  216 
fun syntax_error c = error ("Illegal mixfix syntax for overloaded constant " ^ quote c); 
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val declare_const = 
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(case Class_Target.instantiation_param lthy c of 
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SOME c' => 
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if mx3 <> NoSyn then syntax_error c' 
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else LocalTheory.theory_result (AxClass.declare_overloaded (c', U)) 
29358  222 
##> Class_Target.confirm_declaration c 
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 NONE => 
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(case Overloading.operation lthy c of 
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SOME (c', _) => 
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if mx3 <> NoSyn then syntax_error c' 
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else LocalTheory.theory_result (Overloading.declare (c', U)) 
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##> Overloading.confirm c 
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 NONE => LocalTheory.theory_result (Sign.declare_const tags ((b, U), mx3)))); 
25485  230 
val (const, lthy') = lthy > declare_const; 
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val t = Term.list_comb (const, map Free xs); 
24939  232 
in 
233 
lthy' 

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> is_locale ? term_syntax ta (locale_const ta Syntax.mode_default tags ((b, mx2), t)) 
29358  235 
> is_class ? class_target ta (Class_Target.declare target tags ((c, mx1), t)) 
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> LocalDefs.add_def ((b, NoSyn), t) 
24939  237 
end; 
238 

239 

240 
(* abbrev *) 

241 

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fun abbrev (ta as Target {target, is_locale, is_class, ...}) prmode ((b, mx), t) lthy = 
24939  243 
let 
29006  244 
val c = Binding.base_name b; 
26132  245 
val tags = LocalTheory.group_position_of lthy; 
25053  246 
val thy_ctxt = ProofContext.init (ProofContext.theory_of lthy); 
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val target_ctxt = LocalTheory.target_of lthy; 
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val (mx1, mx2, mx3) = fork_mixfix ta mx; 
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val t' = Assumption.export_term lthy target_ctxt t; 
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val xs = map Free (rev (Variable.add_fixed target_ctxt t' [])); 
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val u = fold_rev lambda xs t'; 
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val global_rhs = 
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singleton (Variable.export_terms (Variable.declare_term u target_ctxt) thy_ctxt) u; 
25121  255 
in 
256 
lthy > 

257 
(if is_locale then 

28861  258 
LocalTheory.theory_result (Sign.add_abbrev PrintMode.internal tags (b, global_rhs)) 
25121  259 
#> (fn (lhs, _) => 
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let val lhs' = Term.list_comb (Logic.unvarify lhs, xs) in 
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term_syntax ta (locale_const ta prmode tags ((b, mx2), lhs')) #> 
29358  262 
is_class ? class_target ta (Class_Target.abbrev target prmode tags ((c, mx1), t')) 
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end) 
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else 
25121  265 
LocalTheory.theory 
28861  266 
(Sign.add_abbrev (#1 prmode) tags (b, global_rhs) #> (fn (lhs, _) => 
25121  267 
Sign.notation true prmode [(lhs, mx3)]))) 
28861  268 
> ProofContext.add_abbrev PrintMode.internal tags (b, t) > snd 
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> LocalDefs.fixed_abbrev ((b, NoSyn), t) 
24939  270 
end; 
271 

272 

25022  273 
(* define *) 
24939  274 

25485  275 
fun define (ta as Target {target, is_locale, is_class, ...}) 
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kind ((b, mx), ((name, atts), rhs)) lthy = 
24939  277 
let 
24987  278 
val thy = ProofContext.theory_of lthy; 
24939  279 
val thy_ctxt = ProofContext.init thy; 
280 

29006  281 
val c = Binding.base_name b; 
28965  282 
val name' = Binding.map_base (Thm.def_name_optional c) name; 
24987  283 
val (rhs', rhs_conv) = 
284 
LocalDefs.export_cterm lthy thy_ctxt (Thm.cterm_of thy rhs) >> Thm.term_of; 

285 
val xs = Variable.add_fixed (LocalTheory.target_of lthy) rhs' []; 

24939  286 
val T = Term.fastype_of rhs; 
287 

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(*const*) 
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val ((lhs, local_def), lthy2) = lthy > declare_const ta (member (op =) xs) ((b, T), mx); 
25022  290 
val (_, lhs') = Logic.dest_equals (Thm.prop_of local_def); 
24939  291 

292 
(*def*) 

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val define_const = 
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(case Overloading.operation lthy c of 
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SOME (_, checked) => 
25519  296 
(fn name => fn (Const (c, _), rhs) => Overloading.define checked name (c, rhs)) 
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 NONE => 
29358  298 
if is_none (Class_Target.instantiation_param lthy c) 
29576  299 
then (fn name => fn eq => Thm.add_def false false (Binding.name name, Logic.mk_equals eq)) 
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else (fn name => fn (Const (c, _), rhs) => AxClass.define_overloaded name (c, rhs))); 
25022  301 
val (global_def, lthy3) = lthy2 
29006  302 
> LocalTheory.theory_result (define_const (Binding.base_name name') (lhs', rhs')); 
25485  303 
val def = LocalDefs.trans_terms lthy3 
25022  304 
[(*c == global.c xs*) local_def, 
305 
(*global.c xs == rhs'*) global_def, 

25485  306 
(*rhs' == rhs*) Thm.symmetric rhs_conv]; 
24939  307 

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(*note*) 
24939  309 
val ([(res_name, [res])], lthy4) = lthy3 
26132  310 
> notes ta kind [((name', atts), [([def], [])])]; 
24939  311 
in ((lhs, (res_name, res)), lthy4) end; 
312 

313 

25291  314 
(* init *) 
315 

316 
local 

20894  317 

25291  318 
fun init_target _ NONE = global_target 
29710  319 
 init_target thy (SOME target) = if Locale.defined thy (Locale.intern thy target) 
320 
then make_target target true (Class_Target.is_class thy target) ([], [], []) [] 

321 
else error ("No such locale: " ^ quote target); 

25291  322 

29576  323 
fun init_ctxt (Target {target, is_locale, is_class, instantiation, overloading}) = 
29358  324 
if not (null (#1 instantiation)) then Class_Target.init_instantiation instantiation 
25519  325 
else if not (null overloading) then Overloading.init overloading 
25485  326 
else if not is_locale then ProofContext.init 
29576  327 
else if not is_class then Locale.init target 
29358  328 
else Class_Target.init target; 
25269  329 

25542  330 
fun init_lthy (ta as Target {target, instantiation, overloading, ...}) = 
25291  331 
Data.put ta #> 
332 
LocalTheory.init (NameSpace.base target) 

333 
{pretty = pretty ta, 

334 
abbrev = abbrev ta, 

335 
define = define ta, 

336 
notes = notes ta, 

337 
type_syntax = type_syntax ta, 

338 
term_syntax = term_syntax ta, 

339 
declaration = declaration ta, 

340 
reinit = fn lthy => init_lthy_ctxt ta (ProofContext.theory_of lthy), 

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exit = LocalTheory.target_of o 
29358  342 
(if not (null (#1 instantiation)) then Class_Target.conclude_instantiation 
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else if not (null overloading) then Overloading.conclude 
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else I)} 
25291  345 
and init_lthy_ctxt ta = init_lthy ta o init_ctxt ta; 
20894  346 

29358  347 
fun read_multi_arity thy (raw_tycos, raw_sorts, raw_sort) = 
348 
let 

349 
val all_arities = map (fn raw_tyco => Sign.read_arity thy 

350 
(raw_tyco, raw_sorts, raw_sort)) raw_tycos; 

351 
val tycos = map #1 all_arities; 

352 
val (_, sorts, sort) = hd all_arities; 

353 
val vs = Name.names Name.context Name.aT sorts; 

354 
in (tycos, vs, sort) end; 

355 

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fun gen_overloading prep_const raw_ops thy = 
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let 
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val ctxt = ProofContext.init thy; 
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val ops = raw_ops > map (fn (name, const, checked) => 
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(name, Term.dest_Const (prep_const ctxt const), checked)); 
29576  361 
in thy > init_lthy_ctxt (make_target "" false false ([], [], []) ops) end; 
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25291  363 
in 
20894  364 

25291  365 
fun init target thy = init_lthy_ctxt (init_target thy target) thy; 
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fun begin target ctxt = init_lthy (init_target (ProofContext.theory_of ctxt) (SOME target)) ctxt; 
25269  367 

25291  368 
fun context "" thy = init NONE thy 
29576  369 
 context target thy = init (SOME (Locale.intern thy target)) thy; 
20894  370 

29576  371 
fun instantiation arities = init_lthy_ctxt (make_target "" false false arities []); 
29358  372 
fun instantiation_cmd raw_arities thy = 
373 
instantiation (read_multi_arity thy raw_arities) thy; 

25519  374 

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val overloading = gen_overloading (fn ctxt => Syntax.check_term ctxt o Const); 
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val overloading_cmd = gen_overloading Syntax.read_term; 
25462  377 

20894  378 
end; 
25291  379 

380 
end; 

381 