diff -r 9a8decba77c5 -r b435ee87d9c8 Nominal/Ex/Lambda.thy
--- a/Nominal/Ex/Lambda.thy	Wed Apr 14 16:10:44 2010 +0200
+++ b/Nominal/Ex/Lambda.thy	Wed Apr 14 16:11:04 2010 +0200
@@ -127,211 +127,60 @@
   | t_App[intro]: "\<lbrakk>\<Gamma> \<turnstile> t1 : T1 \<rightarrow> T2 \<or> \<Gamma> \<turnstile> t2 : T1\<rbrakk> \<Longrightarrow> \<Gamma> \<turnstile> App t1 t2 : T2"
   | t_Lam[intro]: "\<lbrakk>atom x \<sharp> \<Gamma>; (x, T1) # \<Gamma> \<turnstile> t : T2\<rbrakk> \<Longrightarrow> \<Gamma> \<turnstile> Lam x t : T1 \<rightarrow> T2"
 
-
-ML {*
-fun map_term f t = 
-  (case f t of
-     NONE => map_term' f t 
-   | x => x)
-and map_term' f (t $ u) = 
-    (case (map_term f t, map_term f u) of
-        (NONE, NONE) => NONE
-      | (SOME t'', NONE) => SOME (t'' $ u)
-      | (NONE, SOME u'') => SOME (t $ u'')
-      | (SOME t'', SOME u'') => SOME (t'' $ u''))
-  | map_term' f (Abs (s, T, t)) = 
-      (case map_term f t of
-        NONE => NONE
-      | SOME t'' => SOME (Abs (s, T, t'')))
-  | map_term' _ _  = NONE;
-
-fun map_thm_tac ctxt tac thm =
-let
-  val monos = Inductive.get_monos ctxt
-in
-  EVERY [cut_facts_tac [thm] 1, etac rev_mp 1,
-    REPEAT_DETERM (FIRSTGOAL (resolve_tac monos)),
-    REPEAT_DETERM (rtac impI 1 THEN (atac 1 ORELSE tac))]
-end
-
-(* 
- proves F[f t] from F[t] where F[t] is the given theorem  
-  
-  - F needs to be monotone
-  - f returns either SOME for a term it fires 
-    and NONE elsewhere 
-*)
-fun map_thm ctxt f tac thm =
-let
-  val opt_goal_trm = map_term f (prop_of thm)
-  fun prove goal = 
-    Goal.prove ctxt [] [] goal (fn _ => map_thm_tac ctxt tac thm)
-in
-  case opt_goal_trm of
-    NONE => thm
-  | SOME goal => prove goal
-end
+inductive
+  typing' :: "(name\<times>ty) list\<Rightarrow>lam\<Rightarrow>ty\<Rightarrow>bool" ("_ \<Turnstile> _ : _" [60,60,60] 60) 
+where
+    t'_Var[intro]: "\<lbrakk>valid \<Gamma>; (x,T)\<in>set \<Gamma>\<rbrakk> \<Longrightarrow> \<Gamma> \<Turnstile> Var x : T"
+  | t'_App[intro]: "\<lbrakk>\<Gamma> \<Turnstile> t1 : T1\<rightarrow>T2 \<and> \<Gamma> \<Turnstile> t2 : T1\<rbrakk> \<Longrightarrow> \<Gamma> \<Turnstile> App t1 t2 : T2"
+  | t'_Lam[intro]: "\<lbrakk>atom x\<sharp>\<Gamma>;(x,T1)#\<Gamma> \<Turnstile> t : T2\<rbrakk> \<Longrightarrow> \<Gamma> \<Turnstile> Lam x t : T1\<rightarrow>T2"
 
-fun transform_prem ctxt names thm =
-let
-  fun split_conj names (Const ("op &", _) $ p $ q) = 
-      (case head_of p of
-         Const (name, _) => if name mem names then SOME q else NONE
-       | _ => NONE)
-  | split_conj _ _ = NONE;
-in
-  map_thm ctxt (split_conj names) (etac conjunct2 1) thm
-end
-*}
-
-ML {*
-open Nominal_Permeq
-*}
-
-ML {* 
-fun single_case_tac ctxt pred_names pi intro  = 
-let
-  val rule = Drule.instantiate' [] [SOME pi] @{thm permute_boolE}
-in
-  eqvt_strict_tac ctxt [] [] THEN' 
-  SUBPROOF (fn {prems, context as ctxt, ...} =>
-    let
-      val prems' = map (transform_prem ctxt pred_names) prems
-      val side_cond_tac = EVERY' 
-        [ rtac rule, 
-          eqvt_strict_tac ctxt @{thms permute_minus_cancel(2)} [],
-          resolve_tac prems' ]
-    in
-      HEADGOAL (rtac intro THEN_ALL_NEW (resolve_tac prems' ORELSE' side_cond_tac)) 
-    end) ctxt
-end
-*}
-
-ML {*
-fun eqvt_rel_tac pred_name = 
-let
-  val thy = ProofContext.theory_of ctxt
-  val ({names, ...}, {raw_induct, intrs, ...}) =
-    Inductive.the_inductive ctxt (Sign.intern_const thy pred_name)
-  val param_no = length (Inductive.params_of raw_induct)
-  val (([raw_concl], [pi]), ctxt') = 
-    ctxt |> Variable.import_terms false [concl_of raw_induct] 
-         ||>> Variable.variant_fixes ["pi"];
-  val preds = map (fst o HOLogic.dest_imp)
-    (HOLogic.dest_conj (HOLogic.dest_Trueprop raw_concl));
-in
+inductive
+  typing2' :: "(name\<times>ty) list\<Rightarrow>lam\<Rightarrow>ty\<Rightarrow>bool" ("_ 2\<Turnstile> _ : _" [60,60,60] 60) 
+where
+    t2'_Var[intro]: "\<lbrakk>valid \<Gamma>; (x,T)\<in>set \<Gamma>\<rbrakk> \<Longrightarrow> \<Gamma> 2\<Turnstile> Var x : T"
+  | t2'_App[intro]: "\<lbrakk>\<Gamma> 2\<Turnstile> t1 : T1\<rightarrow>T2 \<or> \<Gamma> 2\<Turnstile> t2 : T1\<rbrakk> \<Longrightarrow> \<Gamma> 2\<Turnstile> App t1 t2 : T2"
+  | t2'_Lam[intro]: "\<lbrakk>atom x\<sharp>\<Gamma>;(x,T1)#\<Gamma> 2\<Turnstile> t : T2\<rbrakk> \<Longrightarrow> \<Gamma> 2\<Turnstile> Lam x t : T1\<rightarrow>T2"
 
-end
-*}
-
-
-
-lemma [eqvt]:
-  assumes a: "valid Gamma" 
-  shows "valid (p \<bullet> Gamma)"
-using a
-apply(induct)
-apply(tactic {* my_tac @{context} ["Lambda.valid"] @{cterm "- p"} @{thm valid.intros(1)} 1 *})
-apply(tactic {* my_tac @{context }["Lambda.valid"] @{cterm "- p"} @{thm valid.intros(2)} 1 *})
-done
-
-lemma 
-  shows "Gamma \<turnstile> t : T \<longrightarrow> (p \<bullet> Gamma) \<turnstile> (p \<bullet> t) : (p \<bullet> T)"
-ML_prf {*
-val ({names, ...}, {raw_induct, ...}) =
-      Inductive.the_inductive @{context} (Sign.intern_const @{theory} "typing")
-*}
-apply(tactic {* rtac raw_induct 1 *})
-apply(tactic {* my_tac @{context} ["Lambda.typing"] @{cterm "- p"} @{thm typing.intros(1)} 1 *})
-apply(tactic {* my_tac @{context} ["Lambda.typing"] @{cterm "- p"} @{thm typing.intros(2)} 1 *})
-apply(tactic {* my_tac @{context} ["Lambda.typing"] @{cterm "- p"} @{thm typing.intros(3)} 1 *})
-done
-
-lemma uu[eqvt]:
-  assumes a: "Gamma \<turnstile> t : T" 
-  shows "(p \<bullet> Gamma) \<turnstile> (p \<bullet> t) : (p \<bullet> T)"
-using a
-apply(induct)
-apply(tactic {* my_tac @{context} @{thms typing.intros} 1 *})
-apply(perm_strict_simp)
-apply(rule typing.intros)
-apply(rule conj_mono[THEN mp])
-prefer 3
-apply(assumption)
-apply(rule impI)
-prefer 2
-apply(rule impI)
-apply(simp)
-apply(auto)[1]
-apply(simp)
-apply(tactic {* my_tac @{context} @{thms typing.intros} 1 *})
-done
+inductive
+  typing'' :: "(name\<times>ty) list\<Rightarrow>lam\<Rightarrow>ty\<Rightarrow>bool" ("_ |\<Turnstile> _ : _" [60,60,60] 60)
+and  valid' :: "(name\<times>ty) list \<Rightarrow> bool"
+where
+    v1[intro]: "valid' []"
+  | v2[intro]: "\<lbrakk>valid' \<Gamma>;atom x\<sharp>\<Gamma>\<rbrakk>\<Longrightarrow> valid' ((x,T)#\<Gamma>)"
+  | t'_Var[intro]: "\<lbrakk>valid' \<Gamma>; (x,T)\<in>set \<Gamma>\<rbrakk> \<Longrightarrow> \<Gamma> |\<Turnstile> Var x : T"
+  | t'_App[intro]: "\<lbrakk>\<Gamma> |\<Turnstile> t1 : T1\<rightarrow>T2; \<Gamma> |\<Turnstile> t2 : T1\<rbrakk> \<Longrightarrow> \<Gamma> |\<Turnstile> App t1 t2 : T2"
+  | t'_Lam[intro]: "\<lbrakk>atom x\<sharp>\<Gamma>;(x,T1)#\<Gamma> |\<Turnstile> t : T2\<rbrakk> \<Longrightarrow> \<Gamma> |\<Turnstile> Lam x t : T1\<rightarrow>T2"
 
-(*
-inductive
-  typing :: "(name\<times>ty) list \<Rightarrow> lam \<Rightarrow> ty \<Rightarrow> bool" ("_ \<turnstile> _ : _" [60,60,60] 60) 
-where
-    t_Var[intro]: "\<lbrakk>valid \<Gamma>; (x, T) \<in> set \<Gamma>\<rbrakk> \<Longrightarrow> \<Gamma> \<turnstile> Var x : T"
-  | t_App[intro]: "\<lbrakk>\<Gamma> \<turnstile> t1 : T1 \<rightarrow> T2 \<and> \<Gamma> \<turnstile> t2 : T1\<rbrakk> \<Longrightarrow> \<Gamma> \<turnstile> App t1 t2 : T2"
-  | t_Lam[intro]: "\<lbrakk>atom x \<sharp> \<Gamma>; (x, T1) # \<Gamma> \<turnstile> t : T2\<rbrakk> \<Longrightarrow> \<Gamma> \<turnstile> Lam x t : T1 \<rightarrow> T2"
-
-lemma uu[eqvt]:
-  assumes a: "Gamma \<turnstile> t : T" 
-  shows "(p \<bullet> Gamma) \<turnstile> (p \<bullet> t) : (p \<bullet> T)"
-using a
-apply(induct)
-apply(tactic {* my_tac @{context} @{thms typing.intros} 1 *})
-apply(tactic {* my_tac @{context} @{thms typing.intros} 1 *})
-apply(tactic {* my_tac @{context} @{thms typing.intros} 1 *})
-done
-*)
-
-ML {*
-val inductive_atomize = @{thms induct_atomize};
+use "../../Nominal-General/nominal_eqvt.ML"
 
-val atomize_conv =
-  MetaSimplifier.rewrite_cterm (true, false, false) (K (K NONE))
-    (HOL_basic_ss addsimps inductive_atomize);
-val atomize_intr = Conv.fconv_rule (Conv.prems_conv ~1 atomize_conv);
-fun atomize_induct ctxt = Conv.fconv_rule (Conv.prems_conv ~1
-  (Conv.params_conv ~1 (K (Conv.prems_conv ~1 atomize_conv)) ctxt));
-*}
-
-ML {*
-val ({names, ...}, {raw_induct, intrs, elims, ...}) =
-      Inductive.the_inductive @{context} (Sign.intern_const @{theory} "typing")
-*}
+equivariance valid
+equivariance typing
 
-ML {* val ind_params = Inductive.params_of raw_induct *}
-ML {* val raw_induct = atomize_induct @{context} raw_induct; *}
-ML {* val elims = map (atomize_induct @{context}) elims; *}
-ML {* val monos = Inductive.get_monos @{context}; *}
-
-lemma 
-  shows "Gamma \<turnstile> t : T \<longrightarrow> (p \<bullet> Gamma) \<turnstile> (p \<bullet> t) : (p \<bullet> T)"
-apply(tactic {* rtac raw_induct 1 *})
-apply(tactic {* my_tac @{context} intrs 1 *})
-apply(perm_strict_simp)
-apply(rule typing.intros)
-oops
-
-
+thm valid.eqvt
+thm typing.eqvt
 thm eqvts
 thm eqvts_raw
 
-declare permute_lam_raw.simps[eqvt]
-thm alpha_gen_real_eqvt
-(*declare alpha_gen_real_eqvt[eqvt]*)
+equivariance typing'
+equivariance typing2' 
+equivariance typing''
+
+ML {*
+fun mk_minus p = 
+ Const (@{const_name "uminus"}, @{typ "perm => perm"}) $ p
+*}
 
-lemma
-  assumes a: "alpha_lam_raw t1 t2"
-  shows "alpha_lam_raw (p \<bullet> t1) (p \<bullet> t2)"
-using a
-apply(induct)
-apply(tactic {* my_tac @{context} @{thms alpha_lam_raw.intros} 1 *})
-oops
+inductive
+  tt :: "('a \<Rightarrow> 'a \<Rightarrow> bool) \<Rightarrow> ('a \<Rightarrow> 'a \<Rightarrow> bool)"  
+  for r :: "('a \<Rightarrow> 'a \<Rightarrow> bool)"
+where
+    aa: "tt r a a"
+  | bb: "tt r a b ==> tt r a c"
 
-thm alpha_lam_raw.intros[no_vars]
+(* PROBLEM: derived eqvt-theorem does not conform with [eqvt]
+equivariance tt
+*)
+
 
 inductive
  alpha_lam_raw'
@@ -342,18 +191,15 @@
 | "\<exists>pi. ({atom name}, lam_raw) \<approx>gen alpha_lam_raw fv_lam_raw pi ({atom namea}, lam_rawa) \<Longrightarrow>
    alpha_lam_raw' (Lam_raw name lam_raw) (Lam_raw namea lam_rawa)"
 
+declare permute_lam_raw.simps[eqvt]
+(*declare alpha_gen_real_eqvt[eqvt]*)
+(*equivariance alpha_lam_raw'*)
+
 lemma
   assumes a: "alpha_lam_raw' t1 t2"
   shows "alpha_lam_raw' (p \<bullet> t1) (p \<bullet> t2)"
 using a
 apply(induct)
-apply(tactic {* my_tac @{context} @{thms alpha_lam_raw'.intros} 1 *})
-apply(tactic {* my_tac @{context} @{thms alpha_lam_raw'.intros} 1 *})
-apply(perm_strict_simp)
-apply(rule alpha_lam_raw'.intros)
-apply(simp add: alphas)
-apply(rule_tac p="- p" in permute_boolE)
-apply(perm_simp permute_minus_cancel(2))
 oops