author  wenzelm 
Sat, 10 Nov 2007 14:31:22 +0100  
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child 25381  c100bf5bd6b8 
permissions  rwrr 
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(* Title: Pure/Isar/theory_target.ML 
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ID: $Id$ 

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Author: Makarius 

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Common theory/locale/class 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, is_class: bool} 
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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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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, is_class: bool}; 
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fun make_target target is_locale is_class = 
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Target {target = target, is_locale = is_locale, is_class = is_class}; 

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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 (Target {target, is_locale, is_class}) ctxt = 
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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) => (x, SOME T, NoSyn)) (#1 (ProofContext.inferred_fixes ctxt)); 
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val assumes = map (fn A => (("", []), [(A, [])])) (map Thm.term_of (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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Pretty.block [Pretty.str "theory", Pretty.brk 1, Pretty.str (Context.theory_name thy)] :: 
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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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(* 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 target_naming (Target {target, ...}) lthy = 
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(if target = "" then Sign.naming_of (ProofContext.theory_of lthy) 
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else ProofContext.naming_of (LocalTheory.target_of lthy)) 
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> NameSpace.qualified_names; 

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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.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 = th'' 
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> PureThy.name_thm true true "" 

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> Goal.close_result 

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> fold PureThy.tag_rule (ContextPosition.properties_of ctxt) 
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> PureThy.name_thm true true name; 
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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 name; 

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in (result'', result) end; 
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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 full = LocalTheory.full_name lthy; 
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val facts' = facts 
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> map (fn (a, bs) => (a, PureThy.burrow_fact (PureThy.name_multi (full (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_i kind global_facts #> snd 
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#> Sign.restore_naming thy) 
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> is_locale ? LocalTheory.target (Locale.add_thmss target kind target_facts) 
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> ProofContext.qualified_names 
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> ProofContext.note_thmss_i kind local_facts 
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> ProofContext.restore_naming lthy 
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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, _)) pos ((c, mx), rhs) phi = 
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let 
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val c' = Morphism.name phi c; 

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val rhs' = Morphism.term phi rhs; 

25053  178 
val legacy_arg = (c', Term.close_schematic_term (Logic.legacy_varify rhs')); 
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val arg = (c', 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 class_global = c' = NameSpace.qualified (Class.class_prefix target) c; 
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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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(Sign.add_abbrev PrintMode.internal pos legacy_arg) 
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(ProofContext.add_abbrev PrintMode.internal pos 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  192 
end; 
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fun declare_const (ta as Target {target, is_locale, is_class}) depends ((c, T), mx) lthy = 
24939  195 
let 
25053  196 
val pos = ContextPosition.properties_of lthy; 
24939  197 
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; 
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val (const, lthy') = lthy > LocalTheory.theory_result (Sign.declare_const pos (c, U, mx3)); 
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val t = Term.list_comb (const, map Free xs); 
24939  202 
in 
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lthy' 

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> is_locale ? term_syntax ta (locale_const ta Syntax.mode_default pos ((c, mx2), t)) 
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> is_class ? class_target ta (Class.add_logical_const target pos ((c, mx1), t)) 
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> LocalDefs.add_def ((c, NoSyn), t) 
24939  207 
end; 
208 

209 

210 
(* abbrev *) 

211 

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fun abbrev (ta as Target {target, is_locale, is_class}) prmode ((c, mx), t) lthy = 
24939  213 
let 
25053  214 
val pos = ContextPosition.properties_of lthy; 
215 
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  224 
in 
225 
lthy > 

226 
(if is_locale then 

227 
LocalTheory.theory_result (Sign.add_abbrev PrintMode.internal pos (c, global_rhs)) 

228 
#> (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 pos ((c, mx2), lhs')) #> 
25150  231 
is_class ? class_target ta (Class.add_syntactic_const target prmode pos ((c, mx1), t')) 
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end) 
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else 
25121  234 
LocalTheory.theory 
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(Sign.add_abbrev (#1 prmode) pos (c, global_rhs) #> (fn (lhs, _) => 
25121  236 
Sign.notation true prmode [(lhs, mx3)]))) 
237 
> ProofContext.add_abbrev PrintMode.internal pos (c, t) > snd 

238 
> LocalDefs.fixed_abbrev ((c, NoSyn), t) 

24939  239 
end; 
240 

241 

25022  242 
(* define *) 
24939  243 

25022  244 
fun define (ta as Target {target, is_locale, is_class}) 
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kind ((c, mx), ((name, atts), rhs)) lthy = 
24939  246 
let 
24987  247 
val thy = ProofContext.theory_of lthy; 
24939  248 
val thy_ctxt = ProofContext.init thy; 
249 

25022  250 
val name' = Thm.def_name_optional c name; 
24987  251 
val (rhs', rhs_conv) = 
252 
LocalDefs.export_cterm lthy thy_ctxt (Thm.cterm_of thy rhs) >> Thm.term_of; 

253 
val xs = Variable.add_fixed (LocalTheory.target_of lthy) rhs' []; 

24939  254 
val T = Term.fastype_of rhs; 
255 

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(*const*) 
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val ((lhs, local_def), lthy2) = lthy > declare_const ta (member (op =) xs) ((c, T), mx); 
25022  258 
val (_, lhs') = Logic.dest_equals (Thm.prop_of local_def); 
24939  259 

260 
(*def*) 

25022  261 
val (global_def, lthy3) = lthy2 
24983  262 
> LocalTheory.theory_result (Thm.add_def false (name', Logic.mk_equals (lhs', rhs'))); 
25022  263 
val def = LocalDefs.trans_terms lthy3 
264 
[(*c == global.c xs*) local_def, 

265 
(*global.c xs == rhs'*) global_def, 

266 
(*rhs' == rhs*) Thm.symmetric rhs_conv]; 

24939  267 

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(*note*) 
24939  269 
val ([(res_name, [res])], lthy4) = lthy3 
25022  270 
> notes ta kind [((name', atts), [([def], [])])]; 
24939  271 
in ((lhs, (res_name, res)), lthy4) end; 
272 

273 

274 
(* axioms *) 

275 

25022  276 
fun axioms ta kind (vars, specs) lthy = 
24939  277 
let 
25022  278 
val thy_ctxt = ProofContext.init (ProofContext.theory_of lthy); 
279 
val expanded_props = map (Assumption.export_term lthy thy_ctxt) (maps snd specs); 

280 
val xs = fold Term.add_frees expanded_props []; 

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25022  282 
(*consts*) 
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val (consts, lthy') = fold_map (declare_const ta (member (op =) xs)) vars lthy; 
25022  284 
val global_consts = map (Term.dest_Const o Term.head_of o Thm.term_of o Thm.rhs_of o #2) consts; 
285 

286 
(*axioms*) 

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val hyps = map Thm.term_of (Assumption.assms_of lthy'); 
24939  288 
fun axiom ((name, atts), props) thy = thy 
24983  289 
> fold_map (Thm.add_axiom hyps) (PureThy.name_multi name props) 
24939  290 
> (fn ths => pair ((name, atts), [(ths, [])])); 
291 
in 

24987  292 
lthy' 
25022  293 
> fold Variable.declare_term expanded_props 
294 
> LocalTheory.theory (fold (fn c => Theory.add_deps "" c []) global_consts) 

24939  295 
> LocalTheory.theory_result (fold_map axiom specs) 
25022  296 
> notes ta kind 
24987  297 
>> pair (map #1 consts) 
24939  298 
end; 
299 

300 

25291  301 
(* init *) 
302 

303 
local 

20894  304 

25291  305 
fun init_target _ NONE = global_target 
306 
 init_target thy (SOME target) = make_target target true (Class.is_class thy target); 

307 

308 
fun init_ctxt (Target {target, is_locale, is_class}) = 

25320  309 
if not is_locale then ProofContext.init 
310 
else if not is_class then Locale.init target 

311 
else Class.init target; 

25269  312 

25291  313 
fun init_lthy (ta as Target {target, ...}) = 
314 
Data.put ta #> 

315 
LocalTheory.init (NameSpace.base target) 

316 
{pretty = pretty ta, 

317 
axioms = axioms ta, 

318 
abbrev = abbrev ta, 

319 
define = define ta, 

320 
notes = notes ta, 

321 
type_syntax = type_syntax ta, 

322 
term_syntax = term_syntax ta, 

323 
declaration = declaration ta, 

324 
target_naming = target_naming ta, 

325 
reinit = fn lthy => init_lthy_ctxt ta (ProofContext.theory_of lthy), 

326 
exit = LocalTheory.target_of} 

327 
and init_lthy_ctxt ta = init_lthy ta o init_ctxt ta; 

20894  328 

25291  329 
in 
20894  330 

25291  331 
fun init target thy = init_lthy_ctxt (init_target thy target) thy; 
332 
fun begin target ctxt = init_lthy (init_target (ProofContext.theory_of ctxt) (SOME target)) ctxt; 

25269  333 

25291  334 
fun context "" thy = init NONE thy 
335 
 context target thy = init (SOME (Locale.intern thy target)) thy; 

20894  336 

337 
end; 

25291  338 

339 
end; 

340 