author  wenzelm 
Thu, 07 Dec 2006 17:58:39 +0100  
changeset 21691  826ab43d43f5 
parent 21668  2d811ae6752a 
child 21708  45e7491bea47 
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 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 > string option 
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val begin: bstring > Proof.context > local_theory 
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val init: xstring option > theory > local_theory 
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val init_i: string option > 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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(** locale targets **) 
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(* context data *) 
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structure Data = ProofDataFun 

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( 

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val name = "Isar/theory_target"; 

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type T = string option; 

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fun init _ = NONE; 

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fun print _ _ = (); 

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); 

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val _ = Context.add_setup Data.init; 

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val peek = Data.get; 

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(* pretty *) 
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fun pretty loc ctxt = 

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let 

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val thy = ProofContext.theory_of ctxt; 

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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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if loc = "" then 
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[Pretty.block 

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[Pretty.str "theory", Pretty.brk 1, Pretty.str (Context.theory_name thy), 

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Pretty.str " =", Pretty.brk 1, ThyInfo.pretty_theory thy]] 

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else if null elems then [Pretty.str ("locale " ^ Locale.extern thy loc)] 

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else 

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[Pretty.big_list ("locale " ^ Locale.extern thy loc ^ " =") 

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

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end; 
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(* consts *) 

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fun consts is_loc depends decls lthy = 
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let 
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val xs = filter depends (#1 (ProofContext.inferred_fixes (LocalTheory.target_of lthy))); 
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fun const ((c, T), mx) thy = 

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let 

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val U = map #2 xs > T; 

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val t = Term.list_comb (Const (Sign.full_name thy c, U), map Free xs); 
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val thy' = Sign.add_consts_authentic [(c, U, Syntax.unlocalize_mixfix is_loc mx)] thy; 
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in (((c, mx), t), thy') end; 
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val (abbrs, lthy') = lthy > LocalTheory.theory_result (fold_map const decls); 
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val defs = abbrs > map (fn (x, t) => (x, (("", []), t))); 
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in 
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lthy' 

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> is_loc ? TermSyntax.abbrevs Syntax.default_mode abbrs 
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> LocalDefs.add_defs defs >> map (apsnd snd) 
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end; 
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(* defs *) 

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local 
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infix also; 
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fun eq1 also eq2 = 
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eq2 COMP (eq1 COMP (Drule.incr_indexes2 eq1 eq2 transitive_thm)); 

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fun expand_term ctxt t = 
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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 ct = Thm.cterm_of thy t; 

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val (defs, ct') = LocalDefs.export ctxt thy_ctxt (Drule.mk_term ct) > Drule.dest_term; 
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in (Thm.term_of ct', Tactic.rewrite true defs ct) end; 
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fun add_def (name, prop) = 
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Theory.add_defs_i false false [(name, prop)] #> 

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(fn thy => (Drule.unvarify (Thm.get_axiom_i thy (Sign.full_name thy name)), thy)); 

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in 

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fun defs kind args lthy0 = 
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let 
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fun def ((c, mx), ((name, atts), rhs)) lthy1 = 
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let 
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val (rhs', rhs_conv) = expand_term lthy0 rhs; 
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val xs = Variable.add_fixed (LocalTheory.target_of lthy0) rhs' []; 
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val ([(lhs, lhs_def)], lthy2) = lthy1 
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> LocalTheory.consts (member (op =) xs) [((c, Term.fastype_of rhs), mx)]; 

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val lhs' = #2 (Logic.dest_equals (Thm.prop_of lhs_def)); 

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val name' = Thm.def_name_optional c name; 
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val (def, lthy3) = lthy2 

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> LocalTheory.theory_result (add_def (name', Logic.mk_equals (lhs', rhs'))); 
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val eq = 
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(*c == loc.c xs*) lhs_def 
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(*lhs' == rhs'*) also def 

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(*rhs' == rhs*) also Thm.symmetric rhs_conv; 

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in ((lhs, ((name', atts), [([eq], [])])), lthy3) end; 
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val ((lhss, facts), lthy') = lthy0 > fold_map def args >> split_list; 
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val (res, lthy'') = lthy' > LocalTheory.notes kind facts; 
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in (lhss ~~ map (apsnd the_single) res, lthy'') end; 
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end; 

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(* axioms *) 
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local 
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fun add_axiom hyps (name, prop) thy = 
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let 
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val name' = if name = "" then "axiom_" ^ serial_string () else name; 
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val prop' = Logic.list_implies (hyps, prop); 
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val thy' = thy > Theory.add_axioms_i [(name', prop')]; 
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val axm = Drule.unvarify (Thm.get_axiom_i thy' (Sign.full_name thy' name')); 
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val prems = map (Thm.assume o Thm.cterm_of thy') hyps; 
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in (Drule.implies_elim_list axm prems, thy') end; 
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in 
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fun axioms kind specs lthy = 
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let 
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val hyps = map Thm.term_of (Assumption.assms_of lthy); 
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fun axiom ((name, atts), props) thy = thy 
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> fold_map (add_axiom hyps) (PureThy.name_multi name props) 
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> (fn ths => pair ((name, atts), [(ths, [])])); 
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in 
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lthy 
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> fold (fold Variable.declare_term o snd) specs 
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> LocalTheory.theory_result (fold_map axiom specs) 
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> LocalTheory.notes kind 
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end; 
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end; 
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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 = Tactic.rewrite true defs (Thm.cprop_of th); 
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val assms = map (Tactic.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 (Drule.fold_terms Term.add_tfrees th' []); 
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val frees = map Free (Drule.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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> 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 => res) COMP (concl_conv COMP_INCR Drule.equal_elim_rule2) 
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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 loc kind facts lthy = 
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let 
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val is_loc = loc <> ""; 
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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_loc ? 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_loc 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_loc ? LocalTheory.target (Locale.add_thmss loc kind target_facts) 
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> ProofContext.set_stmt true 
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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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> ProofContext.restore_stmt lthy 
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end; 
242 

243 

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(* target declarations *) 
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fun target_decl _ "" f = 
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LocalTheory.theory (Context.theory_map (f Morphism.identity)) #> 
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LocalTheory.target (Context.proof_map (f Morphism.identity)) 
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 target_decl add loc f = LocalTheory.target (add loc f); 
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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_morphism loc lthy = 
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ProofContext.export_morphism lthy (LocalTheory.target_of lthy) $> 
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Morphism.thm_morphism Goal.norm_result; 
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fun target_name loc lthy = 
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(if loc = "" 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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> NameSpace.full; 

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(* init and exit *) 

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fun begin loc = 
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Data.put (if loc = "" then NONE else SOME loc) #> 

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LocalTheory.init (NameSpace.base loc) 
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{pretty = pretty loc, 
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consts = consts (loc <> ""), 
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axioms = axioms, 
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defs = defs, 

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notes = notes loc, 

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type_syntax = type_syntax loc, 
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term_syntax = term_syntax loc, 
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declaration = declaration loc, 

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target_morphism = target_morphism loc, 
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target_name = target_name loc, 
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reinit = fn _ => begin loc o (if loc = "" then ProofContext.init else Locale.init loc), 
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exit = LocalTheory.target_of}; 
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fun init_i NONE thy = begin "" (ProofContext.init thy) 
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 init_i (SOME loc) thy = begin loc (Locale.init loc thy); 

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fun init (SOME "") thy = init_i NONE thy 
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 init loc thy = init_i (Option.map (Locale.intern thy) loc) thy; 

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end; 