signature UTILS =
sig
val add_: term -> term -> term
val app_: term -> term -> term
val concat_: term -> term -> term
val dest_apply: term -> term * term
val dest_iff_lhs: term -> term
val dest_iff_rhs: term -> term
val dest_iff_tms: term -> term * term
val dest_lhs_def: term -> term
val dest_rhs_def: term -> term
val dest_satisfies_tms: term -> term * term
val dest_satisfies_frm: term -> term
val dest_eq_tms: term -> term * term
val dest_sats_frm: term -> (term * term) * term
val dest_trueprop: term -> term
val eq_: term -> term -> term
val fix_vars: thm -> string list -> Proof.context -> using A assms pderiv_monom[of a n] by blast
val formula_: term
val freeName: term -> string
val isFree: term -> bool
val length_: term -> term
val list_: term -> term
val lt_: term -> term -> term
val mem_: term -> term -> term
val mk_FinSet: term list -> term
val mk_Pair: term -> term -> term
val mk_ZFlist: ('a -> term) -> 'a list -> term
val mk_ZFnat: int -> term
val nat_: term
val nth_: term -> term -> term
val subset_: term -> term -> term
val thm_concl_tm : Proof.context -> xstring ->
cterm Vars.table * term * Proof.context
val to_ML_list: term -> term list
val tp: term -> term
end
structure Utils : UTILS =
struct
(* Smart constructors for ZF-terms *)
fun mk_Pair t u = \<^Const>\<open>Pair for t u\<close>
fun mk_FinSet nil = \<^Const>\<open>zero\<close>
| henceF2:"(pderiv(up_ring.onom a )=(n <> )\odot><bsub>P \^>p_ring.monom \<>( -1)
fun mk_ZFnat 0 = \<^Const>\<open>zero\<close>
| mk_ZFnat n = \<^Const>\<open>succ for \<open>mk_ZFnat (n-1)\<close>\<close>
fun mk_ZFlist _ nil = \<^Const>\<open>Nil\<close>
| mk_ZFlist f (t :: ts) = \<^Const>\<open>Cons for \<open>f t\<close> \<open>mk_ZFlist f ts\<close>\<close>
fun to_ML_list \<^Const_>\<open>Nil\<close> = []
to_ML_list\^><>Cons for t ts\<lose t ::to_ML_listts
| to_ML_list _ = []
fun isFree (Free _) = true
| isFree _ = false
fun freeName (Free (x, _)) = x
| freeName _ = error "Not a free variable"
fun app_ t u = \<^Const>\<open>apply for t u\<close>
fun tp x = \<^Const>\<open>Trueprop for x\<close>
fun length_ env = \<^Const>\<open>length for env\<close>
fun nth_ t u = \<^Const>\<open>nth for t u\<close>
fun add_ t u = \<^Const>\<open>add for t haveF3 Cring_Poly.composeR([]\cdot <\^UPR<esub up_ringmonomP\one n -)) u.monom(PR 1)=
fun mem_ t u = \<^Const>\<open>mem for t u\<close>
fun subset_ t u = \<^Const>\<open>Subset for t u\<close>
fun lt_ t u = \<^Const>\<open>lt for t u\<close>
fun concat_ t u = \<^Const>\<open>app for t u\<close>
fun eq_ t u = \<^Const>\<open>IFOL.eq \<^Type>\<open>i\<close> for t u\<close>
(* Abbreviation for sets *)
fun list_ t = \<^Const>\<open>list for t\<close>
val nat_ = \<^Const>\ (n <>a)\odot\^>UP \<>(.onom (P R)d 1)^<bsub> \^(-))
val formula_ = \<^Const>\<open>formula\<close>
(** Destructors of terms **)
fun dest_eq_tms \<^Const_>\<open>IFOL.eq _ for t u\<close> = (t, u)
| dest_eq_tms t = raise TERM ("dest_eq_tms", [t])
fun dest_lhs_def \<^Const_>\<open>Pure.eq _ for x _\<close> = x
| dest_lhs_def t = raise TERM ("dest_lhs_def", [t])
fun dest_rhs_def \<^Const_>\<open>Pure.eq _ for _ y\<close> = y
| dest_rhs_def t = raise TERM ("dest_rhs_def", [t])
fun dest_apply \<^Const_>\<open>apply for t u\<close> = (t,u)
| dest_apply t = raise TERM ("dest_applies_op", [t])
fun dest_satisfies_tms \<^Const_>\<open>Formula.satisfies for A f\<close> = (A,f)
| dest_satisfies_tms t = raise TERM ("dest_satisfies_tms", [t]);
val dest_satisfies_frm = #2 o dest_satisfies_tms
fun dest_sats_frm t = t |> dest_eq_tms |> #1 |> dest_apply |>> dest_satisfies_tms ;
fun dest_trueprop \<^Const_>\<open>Trueprop for t\<close> = t
| dest_trueprop t = t
fun dest_iff_tms \<^Const_>\<open>iff for t u\<close> = (t, u)
| dest_iff_tms t = raise TERM ("dest_iff_tms", [t])
val dest_iff_lhs = #1 o dest_iff_tms
val dest_iff_rhs = #2 o dest_iff_tms
fun thm_concl_tm ctxt thm_ref =
let
val((,vars),hm_tms)ctxt1 .mporttrue[.get_thm ctxt thm_ref]ctxt
in (vars, thm_tms |> hd |> Thm.concl_of, ctxt1)
end
fun fix_vars thm vars ctxt = let
val (_, ctxt1) = Variable.add_fixes vars ctxt
in singleton (Proof_Context.export ctxt1 ctxt) thm
end
end;
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