theory SingleLet

imports "../NewParser"

begin

atom_decl name

declare [[STEPS = 17]]

nominal_datatype trm  =

  Var "name"

| App "trm" "trm"

| Lam x::"name" t::"trm"  bind_set x in t

| Let a::"assg" t::"trm"  bind_set "bn a" in t

| Foo x::"name" y::"name" t::"trm" t1::"trm" t2::"trm" bind_set x in y t t1 t2

| Bar x::"name" y::"name" t::"trm" bind y x in t x y

| Baz x::"name" t1::"trm" t2::"trm" bind x in t1, bind x in t2 

and assg =

  As "name" x::"name" t::"trm" bind x in t

binder

  bn::"assg \<Rightarrow> atom set"

where

  "bn (As x y t) = {atom x}"

thm size_eqvt

thm alpha_bn_imps

thm distinct

thm eq_iff

thm eq_iff_simps

thm fv_defs

thm perm_simps

thm perm_laws

thm funs_rsp

typ trm

typ assg

term Var 

term App

term Baz

term bn

term fv_trm

term alpha_bn

lemma exi_zero: "P 0 \<Longrightarrow> \<exists>(x::perm). P x" by auto

ML {* 

  val pre_ss = @{thms fun_rel_def}

  val post_ss = @{thms alphas prod_alpha_def prod_rel.simps 

    prod_fv.simps fresh_star_zero permute_zero funs_rsp prod.cases alpha_bn_imps}

  val tac = 

    asm_full_simp_tac (HOL_ss addsimps pre_ss)

    THEN' REPEAT o (resolve_tac @{thms allI impI})

    THEN' resolve_tac @{thms alpha_trm_raw_alpha_assg_raw_alpha_bn_raw.intros} 

    THEN_ALL_NEW (TRY o (rtac @{thm exi_zero}) THEN' asm_full_simp_tac (HOL_ss addsimps post_ss))

*}

lemma [quot_respect]: 

  "(op= ===> alpha_trm_raw) Var_raw Var_raw"

  "(alpha_trm_raw ===> alpha_trm_raw ===> alpha_trm_raw) App_raw App_raw"

  "(op= ===> alpha_trm_raw ===> alpha_trm_raw) Lam_raw Lam_raw"

  "(alpha_assg_raw ===> alpha_trm_raw ===> alpha_trm_raw) Let_raw Let_raw"

  "(op= ===> op= ===> alpha_trm_raw ===> alpha_trm_raw ===> alpha_trm_raw ===> alpha_trm_raw)

     Foo_raw Foo_raw"

  "(op= ===> op= ===> alpha_trm_raw ===> alpha_trm_raw) Bar_raw Bar_raw"

  "(op= ===> alpha_trm_raw ===> alpha_trm_raw ===> alpha_trm_raw) Baz_raw Baz_raw"

  "(op = ===> op = ===> alpha_trm_raw ===> alpha_assg_raw) As_raw As_raw"

apply(tactic {* ALLGOALS tac *})

done

lemma [quot_respect]:

  "(alpha_trm_raw ===> op =) fv_trm_raw fv_trm_raw"

  "(alpha_assg_raw ===> op =) fv_bn_raw fv_bn_raw"

  "(alpha_assg_raw ===> op =) bn_raw bn_raw"

  "(alpha_assg_raw ===> op =) fv_assg_raw fv_assg_raw"

  "(op = ===> alpha_trm_raw ===> alpha_trm_raw) permute permute"

apply(simp_all add: alpha_bn_imps funs_rsp)

sorry

ML {*

  val thms_d = map (lift_thm [@{typ trm}, @{typ assg}] @{context}) @{thms distinct}

*}

ML {* 

  val thms_i = map (lift_thm [@{typ trm}, @{typ assg}] @{context}) @{thms trm_raw_assg_raw.inducts}

*}

ML {*

  val thms_f = map (lift_thm [@{typ trm}, @{typ assg}] @{context}) @{thms fv_defs}

*}

thm perm_defs[no_vars]

instance trm :: pt sorry

instance assg :: pt sorry

lemma b1:

  "p \<bullet> Var name = Var (p \<bullet> name)"

  "p \<bullet> App trm1 trm2 = App (p \<bullet> trm1) (p \<bullet> trm2)"

  "p \<bullet> Lam name trm = Lam (p \<bullet> name) (p \<bullet> trm)"

  "p \<bullet> Let assg trm = Let (p \<bullet> assg) (p \<bullet> trm)"

  "p \<bullet> Foo name1 name2 trm1 trm2 trm3 =

     Foo (p \<bullet> name1) (p \<bullet> name2) (p \<bullet> trm1) (p \<bullet> trm2) (p \<bullet> trm3)"

  "p \<bullet> Bar name1 name2 trm = Bar (p \<bullet> name1) (p \<bullet> name2) (p \<bullet> trm)"

  "p \<bullet> Baz name trm1 trm2 = Baz (p \<bullet> name) (p \<bullet> trm1) (p \<bullet> trm2)"

  "p \<bullet> As name1 name2 trm = As (p \<bullet> name1) (p \<bullet> name2) (p \<bullet> trm)"

sorry

(*

ML {*

  val thms_p = map (lift_thm [@{typ trm}, @{typ assg}] @{context}) @{thms perm_defs}

*}

*)

thm eq_iff[no_vars]

ML {*

  val q1 = lift_thm [@{typ trm}, @{typ assg}] @{context} @{thm "eq_iff"(1)}

*}

local_setup {* Local_Theory.note ((@{binding d1}, []), thms_d) #> snd *}

local_setup {* Local_Theory.note ((@{binding i1}, []), thms_i) #> snd *}

local_setup {* Local_Theory.note ((@{binding f1}, []), thms_f) #> snd *}

local_setup {* Local_Theory.note ((@{binding q1}, []), [q1]) #> snd *}

thm perm_defs

thm perm_simps

lemma supp_fv:

  "supp t = fv_trm t"

  "supp b = fv_bn b"

apply(induct t and b rule: i1)

apply(simp_all add: f1)

apply(simp_all add: supp_def)

apply(simp_all add: b1)

sorry

consts perm_bn_trm :: "perm \<Rightarrow> trm \<Rightarrow> trm"

consts perm_bn_assg :: "perm \<Rightarrow> assg \<Rightarrow> assg"

lemma y:

  "perm_bn_trm p (Var x) = (Var x)"

  "perm_bn_trm p (App t1 t2) = (App t1 t2)"

  "perm_bn_trm p ("

ML {*

  map (lift_thm [@{typ trm}, @{typ assg}] @{context}) @{thms eq_iff}

*}

lemma "Var x \<noteq> App y1 y2"

apply(descending)

apply(simp add: trm_raw.distinct)

ML {*

  map (lift_thm [@{typ trm}, @{typ assg}] @{context}) @{thms trm_raw.distinct(1)}

*}

typ trm

typ assg

thm trm_assg.fv

thm trm_assg.supp

thm trm_assg.eq_iff

thm trm_assg.bn

thm trm_assg.perm

thm trm_assg.induct

thm trm_assg.inducts

thm trm_assg.distinct

ML {* Sign.of_sort @{theory} (@{typ trm}, @{sort fs}) *}

(* TEMPORARY

thm trm_assg.fv[simplified trm_assg.supp(1-2)]

*)

end