author | blanchet |
Tue, 04 Sep 2012 13:02:32 +0200 | |
changeset 49120 | 7f8e69fc6ac9 |
parent 49119 | 1f605c36869c |
child 49121 | 9e0acaa470ab |
permissions | -rw-r--r-- |
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(* Title: HOL/Codatatype/Tools/bnf_wrap.ML |
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Author: Jasmin Blanchette, TU Muenchen |
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Copyright 2012 |
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Wrapping existing datatypes. |
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*) |
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signature BNF_WRAP = |
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sig |
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val no_name: binding |
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val wrap: ({prems: thm list, context: Proof.context} -> tactic) list list -> |
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(term list * term) * (binding list * binding list list) -> local_theory -> local_theory |
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end; |
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structure BNF_Wrap : BNF_WRAP = |
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struct |
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open BNF_Util |
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open BNF_Wrap_Tactics |
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val is_N = "is_"; |
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val un_N = "un_"; |
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fun mk_un_N 1 1 suf = un_N ^ suf |
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| mk_un_N _ l suf = un_N ^ suf ^ string_of_int l; |
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val case_congN = "case_cong"; |
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val case_eqN = "case_eq"; |
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val casesN = "cases"; |
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val collapseN = "collapse"; |
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val disc_exclusN = "disc_exclus"; |
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val disc_exhaustN = "disc_exhaust"; |
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val discsN = "discs"; |
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val distinctN = "distinct"; |
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val exhaustN = "exhaust"; |
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val injectN = "inject"; |
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val nchotomyN = "nchotomy"; |
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val selsN = "sels"; |
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val splitN = "split"; |
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val split_asmN = "split_asm"; |
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val weak_case_cong_thmsN = "weak_case_cong"; |
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val no_name = @{binding "*"}; |
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val fallback_name = @{binding _}; |
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fun pad_list x n xs = xs @ replicate (n - length xs) x; |
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fun mk_half_pairss' _ [] = [] |
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| mk_half_pairss' indent (y :: ys) = |
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indent @ fold_rev (cons o single o pair y) ys (mk_half_pairss' ([] :: indent) ys); |
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fun mk_half_pairss ys = mk_half_pairss' [[]] ys; |
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val mk_Trueprop_eq = HOLogic.mk_Trueprop o HOLogic.mk_eq; |
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fun mk_undef T Ts = Const (@{const_name undefined}, Ts ---> T); |
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fun eta_expand_caseof_arg xs f_xs = fold_rev Term.lambda xs f_xs; |
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fun name_of_ctr t = |
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case head_of t of |
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Const (s, _) => s |
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| Free (s, _) => s |
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| _ => error "Cannot extract name of constructor"; |
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fun prepare_wrap prep_term ((raw_ctrs, raw_caseof), (raw_disc_names, raw_sel_namess)) |
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no_defs_lthy = |
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let |
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(* TODO: sanity checks on arguments *) |
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(* TODO: attributes (simp, case_names, etc.) *) |
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(* TODO: case syntax *) |
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(* TODO: integration with function package ("size") *) |
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val ctrs0 = map (prep_term no_defs_lthy) raw_ctrs; |
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val caseof0 = prep_term no_defs_lthy raw_caseof; |
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val n = length ctrs0; |
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val ks = 1 upto n; |
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val (T_name, As0) = dest_Type (body_type (fastype_of (hd ctrs0))); |
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val b = Binding.qualified_name T_name; |
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val (As, B) = |
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no_defs_lthy |
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|> mk_TFrees (length As0) |
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||> the_single o fst o mk_TFrees 1; |
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fun mk_ctr Ts ctr = |
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let val Ts0 = snd (dest_Type (body_type (fastype_of ctr))) in |
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Term.subst_atomic_types (Ts0 ~~ Ts) ctr |
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end; |
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val T = Type (T_name, As); |
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val ctrs = map (mk_ctr As) ctrs0; |
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val ctr_Tss = map (binder_types o fastype_of) ctrs; |
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val ms = map length ctr_Tss; |
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val raw_disc_names' = pad_list no_name n raw_disc_names; |
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fun can_rely_on_disc i = |
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not (Binding.eq_name (nth raw_disc_names' i, no_name)) orelse nth ms i = 0; |
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fun can_omit_disc_name k m = |
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n = 1 orelse m = 0 orelse (n = 2 andalso can_rely_on_disc (2 - k)) |
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val fallback_disc_name = Binding.name o prefix is_N o Long_Name.base_name o name_of_ctr; |
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val disc_names = |
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raw_disc_names' |
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|> map4 (fn k => fn m => fn ctr => fn disc => |
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if Binding.eq_name (disc, no_name) then |
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if can_omit_disc_name k m then NONE else SOME (fallback_disc_name ctr) |
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else if Binding.eq_name (disc, fallback_name) then |
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SOME (fallback_disc_name ctr) |
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else |
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SOME disc) ks ms ctrs0; |
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val no_discs = map is_none disc_names; |
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fun fallback_sel_name m l = Binding.name o mk_un_N m l o Long_Name.base_name o name_of_ctr; |
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val sel_namess = |
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pad_list [] n raw_sel_namess |
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|> map3 (fn ctr => fn m => map2 (fn l => fn sel => |
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if Binding.eq_name (sel, no_name) orelse Binding.eq_name (sel, fallback_name) then |
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fallback_sel_name m l ctr |
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else |
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sel) (1 upto m) o pad_list no_name m) ctrs0 ms; |
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fun mk_caseof Ts T = |
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let val (binders, body) = strip_type (fastype_of caseof0) in |
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Term.subst_atomic_types ((body, T) :: (snd (dest_Type (List.last binders)) ~~ Ts)) caseof0 |
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end; |
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val caseofB = mk_caseof As B; |
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val caseofB_Ts = map (fn Ts => Ts ---> B) ctr_Tss; |
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fun mk_caseofB_term eta_fs = Term.list_comb (caseofB, eta_fs); |
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val (((((((xss, yss), fs), gs), (v, v')), w), (p, p')), names_lthy) = no_defs_lthy |> |
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mk_Freess "x" ctr_Tss |
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||>> mk_Freess "y" ctr_Tss |
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||>> mk_Frees "f" caseofB_Ts |
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||>> mk_Frees "g" caseofB_Ts |
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||>> yield_singleton (apfst (op ~~) oo mk_Frees' "v") T |
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||>> yield_singleton (mk_Frees "w") T |
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||>> yield_singleton (apfst (op ~~) oo mk_Frees' "P") HOLogic.boolT; |
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val q = Free (fst p', B --> HOLogic.boolT); |
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val xctrs = map2 (curry Term.list_comb) ctrs xss; |
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val yctrs = map2 (curry Term.list_comb) ctrs yss; |
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val xfs = map2 (curry Term.list_comb) fs xss; |
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val xgs = map2 (curry Term.list_comb) gs xss; |
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val eta_fs = map2 eta_expand_caseof_arg xss xfs; |
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val eta_gs = map2 eta_expand_caseof_arg xss xgs; |
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val caseofB_fs = Term.list_comb (caseofB, eta_fs); |
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val exist_xs_v_eq_ctrs = |
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map2 (fn xctr => fn xs => list_exists_free xs (HOLogic.mk_eq (v, xctr))) xctrs xss; |
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fun mk_sel_caseof_args k xs x T = |
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map2 (fn Ts => fn i => if i = k then fold_rev Term.lambda xs x else mk_undef T Ts) ctr_Tss ks; |
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fun disc_free b = Free (Binding.name_of b, T --> HOLogic.boolT); |
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fun disc_spec b exist_xs_v_eq_ctr = mk_Trueprop_eq (disc_free b $ v, exist_xs_v_eq_ctr); |
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fun not_other_disc_lhs i = |
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HOLogic.mk_not |
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(case nth disc_names i of NONE => nth exist_xs_v_eq_ctrs i | SOME b => disc_free b $ v); |
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fun not_other_disc k = |
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if n = 2 then Term.lambda v (not_other_disc_lhs (2 - k)) else error "Cannot use \"*\" here" |
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fun sel_spec b x xs k = |
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let val T' = fastype_of x in |
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mk_Trueprop_eq (Free (Binding.name_of b, T --> T') $ v, |
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Term.list_comb (mk_caseof As T', mk_sel_caseof_args k xs x T') $ v) |
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end; |
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||
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val missing_disc_def = TrueI; (* marker *) |
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val (((raw_discs, raw_disc_defs), (raw_selss, raw_sel_defss)), (lthy', lthy)) = |
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no_defs_lthy |
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|> apfst split_list o fold_map4 (fn k => fn m => fn exist_xs_v_eq_ctr => |
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fn NONE => |
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if m = 0 then pair (Term.lambda v exist_xs_v_eq_ctr, refl) |
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else pair (not_other_disc k, missing_disc_def) |
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| SOME b => Specification.definition (SOME (b, NONE, NoSyn), |
193 |
((Thm.def_binding b, []), disc_spec b exist_xs_v_eq_ctr)) #>> apsnd snd) |
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ks ms exist_xs_v_eq_ctrs disc_names |
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||>> apfst split_list o fold_map3 (fn bs => fn xs => fn k => apfst split_list o |
196 |
fold_map2 (fn b => fn x => Specification.definition (SOME (b, NONE, NoSyn), |
|
197 |
((Thm.def_binding b, []), sel_spec b x xs k)) #>> apsnd snd) bs xs) sel_namess xss ks |
|
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||> `Local_Theory.restore; |
199 |
||
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(*transforms defined frees into consts (and more)*) |
201 |
val phi = Proof_Context.export_morphism lthy lthy'; |
|
202 |
||
49028 | 203 |
val disc_defs = map (Morphism.thm phi) raw_disc_defs; |
204 |
val sel_defss = map (map (Morphism.thm phi)) raw_sel_defss; |
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205 |
||
206 |
val discs0 = map (Morphism.term phi) raw_discs; |
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207 |
val selss0 = map (map (Morphism.term phi)) raw_selss; |
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fun mk_disc_or_sel Ts t = |
210 |
Term.subst_atomic_types (snd (dest_Type (domain_type (fastype_of t))) ~~ Ts) t; |
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211 |
||
212 |
val discs = map (mk_disc_or_sel As) discs0; |
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213 |
val selss = map (map (mk_disc_or_sel As)) selss0; |
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|
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fun mk_imp_p Qs = Logic.list_implies (Qs, HOLogic.mk_Trueprop p); |
49029 | 216 |
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val goal_exhaust = |
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let fun mk_prem xctr xs = fold_rev Logic.all xs (mk_imp_p [mk_Trueprop_eq (v, xctr)]) in |
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mk_imp_p (map2 mk_prem xctrs xss) |
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end; |
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val goal_injectss = |
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let |
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fun mk_goal _ _ [] [] = [] |
49025 | 225 |
| mk_goal xctr yctr xs ys = |
49034
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|
226 |
[mk_Trueprop_eq (HOLogic.mk_eq (xctr, yctr), |
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|
227 |
Library.foldr1 HOLogic.mk_conj (map2 (curry HOLogic.mk_eq) xs ys))]; |
49017 | 228 |
in |
49034
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|
229 |
map4 mk_goal xctrs yctrs xss yss |
49017 | 230 |
end; |
231 |
||
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|
232 |
val goal_half_distinctss = |
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|
233 |
map (map (HOLogic.mk_Trueprop o HOLogic.mk_not o HOLogic.mk_eq)) (mk_half_pairss xctrs); |
49019 | 234 |
|
49043 | 235 |
val goal_cases = map2 (fn xctr => fn xf => mk_Trueprop_eq (caseofB_fs $ xctr, xf)) xctrs xfs; |
49025 | 236 |
|
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|
237 |
val goals = [goal_exhaust] :: goal_injectss @ goal_half_distinctss @ [goal_cases]; |
49019 | 238 |
|
239 |
fun after_qed thmss lthy = |
|
240 |
let |
|
49048
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|
241 |
val ([exhaust_thm], (inject_thmss, (half_distinct_thmss, [case_thms]))) = |
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|
242 |
(hd thmss, apsnd (chop (n * n)) (chop n (tl thmss))); |
49019 | 243 |
|
49032 | 244 |
val exhaust_thm' = |
245 |
let val Tinst = map (pairself (certifyT lthy)) (map Logic.varifyT_global As ~~ As) in |
|
246 |
Drule.instantiate' [] [SOME (certify lthy v)] |
|
247 |
(Thm.instantiate (Tinst, []) (Drule.zero_var_indexes exhaust_thm)) |
|
248 |
end; |
|
249 |
||
49048
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|
250 |
val other_half_distinct_thmss = map (map (fn thm => thm RS not_sym)) half_distinct_thmss; |
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|
251 |
|
49052 | 252 |
val (distinct_thmsss', distinct_thmsss) = |
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|
253 |
map2 (map2 append) (Library.chop_groups n half_distinct_thmss) |
49052 | 254 |
(transpose (Library.chop_groups n other_half_distinct_thmss)) |
255 |
|> `transpose; |
|
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|
256 |
val distinct_thms = interleave (flat half_distinct_thmss) (flat other_half_distinct_thmss); |
49019 | 257 |
|
49020
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|
258 |
val nchotomy_thm = |
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|
259 |
let |
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|
260 |
val goal = |
49022 | 261 |
HOLogic.mk_Trueprop (HOLogic.mk_all (fst v', snd v', |
49029 | 262 |
Library.foldr1 HOLogic.mk_disj exist_xs_v_eq_ctrs)); |
49020
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|
263 |
in |
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|
264 |
Skip_Proof.prove lthy [] [] goal (fn _ => mk_nchotomy_tac n exhaust_thm) |
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|
265 |
end; |
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|
266 |
|
49030 | 267 |
val sel_thmss = |
49025 | 268 |
let |
49028 | 269 |
fun mk_thm k xs goal_case case_thm x sel_def = |
49025 | 270 |
let |
271 |
val T = fastype_of x; |
|
272 |
val cTs = |
|
273 |
map ((fn T' => certifyT lthy (if T' = B then T else T')) o TFree) |
|
274 |
(rev (Term.add_tfrees goal_case [])); |
|
49032 | 275 |
val cxs = map (certify lthy) (mk_sel_caseof_args k xs x T); |
49025 | 276 |
in |
277 |
Local_Defs.fold lthy [sel_def] |
|
278 |
(Drule.instantiate' (map SOME cTs) (map SOME cxs) case_thm) |
|
279 |
end; |
|
49028 | 280 |
fun mk_thms k xs goal_case case_thm sel_defs = |
281 |
map2 (mk_thm k xs goal_case case_thm) xs sel_defs; |
|
49025 | 282 |
in |
49030 | 283 |
map5 mk_thms ks xss goal_cases case_thms sel_defss |
49025 | 284 |
end; |
285 |
||
49116
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|
286 |
fun not_other_disc_def k = |
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|
287 |
let |
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changeset
|
288 |
val goal = |
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changeset
|
289 |
mk_Trueprop_eq (Morphism.term phi (not_other_disc_lhs (2 - k)), |
3d520eec2746
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|
290 |
nth exist_xs_v_eq_ctrs (k - 1)); |
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changeset
|
291 |
in |
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changeset
|
292 |
Skip_Proof.prove lthy [] [] goal (fn {context = ctxt, ...} => |
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|
293 |
mk_not_other_disc_def_tac ctxt (nth disc_defs (2 - k)) (nth distinct_thms (2 - k)) |
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|
294 |
exhaust_thm') |
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|
295 |
|> singleton (Proof_Context.export names_lthy lthy) |
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|
296 |
end; |
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changeset
|
297 |
|
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|
298 |
val has_not_other_disc_def = |
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|
299 |
exists (fn def => Thm.eq_thm_prop (def, missing_disc_def)) disc_defs; |
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changeset
|
300 |
|
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|
301 |
val disc_defs' = |
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changeset
|
302 |
map2 (fn k => fn def => |
3d520eec2746
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changeset
|
303 |
if Thm.eq_thm_prop (def, missing_disc_def) then not_other_disc_def k else def) |
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|
304 |
ks disc_defs; |
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changeset
|
305 |
|
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parents:
49114
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changeset
|
306 |
val discD_thms = map (fn def => def RS iffD1) disc_defs'; |
49028 | 307 |
val discI_thms = |
49116
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parents:
49114
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changeset
|
308 |
map2 (fn m => fn def => funpow m (fn thm => exI RS thm) (def RS iffD2)) ms disc_defs'; |
49028 | 309 |
val not_disc_thms = |
49030 | 310 |
map2 (fn m => fn def => funpow m (fn thm => allI RS thm) |
49116
3d520eec2746
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|
311 |
(Local_Defs.unfold lthy @{thms not_ex} (def RS @{thm ssubst[of _ _ Not]}))) |
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changeset
|
312 |
ms disc_defs'; |
49028 | 313 |
|
49050 | 314 |
val (disc_thmss', disc_thmss) = |
49027 | 315 |
let |
49048
4e0f0f98be02
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49046
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|
316 |
fun mk_thm discI _ [] = refl RS discI |
4e0f0f98be02
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|
317 |
| mk_thm _ not_disc [distinct] = distinct RS not_disc; |
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49046
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|
318 |
fun mk_thms discI not_disc distinctss = map (mk_thm discI not_disc) distinctss; |
49027 | 319 |
in |
49114 | 320 |
map3 mk_thms discI_thms not_disc_thms distinct_thmsss' |> `transpose |
49027 | 321 |
end; |
49025 | 322 |
|
49116
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parents:
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changeset
|
323 |
val disc_thms = flat (map2 (fn true => K [] | false => I) no_discs disc_thmss); |
3d520eec2746
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blanchet
parents:
49114
diff
changeset
|
324 |
|
49053 | 325 |
val disc_exclus_thms = |
49116
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changeset
|
326 |
if has_not_other_disc_def then |
3d520eec2746
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|
327 |
[] |
3d520eec2746
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parents:
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changeset
|
328 |
else |
3d520eec2746
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blanchet
parents:
49114
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changeset
|
329 |
let |
3d520eec2746
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parents:
49114
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changeset
|
330 |
fun mk_goal [] = [] |
3d520eec2746
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changeset
|
331 |
| mk_goal [((_, true), (_, true))] = [] |
3d520eec2746
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parents:
49114
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|
332 |
| mk_goal [(((_, disc), _), ((_, disc'), _))] = |
3d520eec2746
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blanchet
parents:
49114
diff
changeset
|
333 |
[Logic.all v (Logic.mk_implies (HOLogic.mk_Trueprop (betapply (disc, v)), |
3d520eec2746
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blanchet
parents:
49114
diff
changeset
|
334 |
HOLogic.mk_Trueprop (HOLogic.mk_not (betapply (disc', v)))))]; |
3d520eec2746
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blanchet
parents:
49114
diff
changeset
|
335 |
fun prove tac goal = Skip_Proof.prove lthy [] [] goal (K tac); |
49028 | 336 |
|
49116
3d520eec2746
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parents:
49114
diff
changeset
|
337 |
val bundles = ms ~~ discD_thms ~~ discs ~~ no_discs; |
3d520eec2746
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blanchet
parents:
49114
diff
changeset
|
338 |
val half_pairss = mk_half_pairss bundles; |
49028 | 339 |
|
49116
3d520eec2746
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parents:
49114
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changeset
|
340 |
val goal_halvess = map mk_goal half_pairss; |
3d520eec2746
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blanchet
parents:
49114
diff
changeset
|
341 |
val half_thmss = |
3d520eec2746
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blanchet
parents:
49114
diff
changeset
|
342 |
map3 (fn [] => K (K []) | [goal] => fn [((((m, discD), _), _), _)] => fn disc_thm => |
3d520eec2746
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blanchet
parents:
49114
diff
changeset
|
343 |
[prove (mk_half_disc_exclus_tac m discD disc_thm) goal]) |
3d520eec2746
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parents:
49114
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changeset
|
344 |
goal_halvess half_pairss (flat disc_thmss'); |
49028 | 345 |
|
49116
3d520eec2746
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parents:
49114
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changeset
|
346 |
val goal_other_halvess = map (mk_goal o map swap) half_pairss; |
3d520eec2746
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blanchet
parents:
49114
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changeset
|
347 |
val other_half_thmss = |
3d520eec2746
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blanchet
parents:
49114
diff
changeset
|
348 |
map2 (map2 (prove o mk_other_half_disc_exclus_tac)) half_thmss goal_other_halvess; |
3d520eec2746
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blanchet
parents:
49114
diff
changeset
|
349 |
in |
3d520eec2746
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blanchet
parents:
49114
diff
changeset
|
350 |
interleave (flat half_thmss) (flat other_half_thmss) |
3d520eec2746
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blanchet
parents:
49114
diff
changeset
|
351 |
end; |
49025 | 352 |
|
49116
3d520eec2746
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blanchet
parents:
49114
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changeset
|
353 |
val disc_exhaust_thms = |
3d520eec2746
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blanchet
parents:
49114
diff
changeset
|
354 |
if has_not_other_disc_def orelse forall I no_discs then |
3d520eec2746
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blanchet
parents:
49114
diff
changeset
|
355 |
[] |
3d520eec2746
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blanchet
parents:
49114
diff
changeset
|
356 |
else |
3d520eec2746
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blanchet
parents:
49114
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changeset
|
357 |
let |
3d520eec2746
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blanchet
parents:
49114
diff
changeset
|
358 |
fun mk_prem disc = mk_imp_p [HOLogic.mk_Trueprop (betapply (disc, v))]; |
3d520eec2746
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blanchet
parents:
49114
diff
changeset
|
359 |
val goal = fold Logic.all [p, v] (mk_imp_p (map mk_prem discs)); |
3d520eec2746
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blanchet
parents:
49114
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changeset
|
360 |
in |
3d520eec2746
allow pseudo-definition of is_Cons in terms of is_Nil (and similarly for other two-constructor datatypes)
blanchet
parents:
49114
diff
changeset
|
361 |
[Skip_Proof.prove lthy [] [] goal (fn _ => |
3d520eec2746
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blanchet
parents:
49114
diff
changeset
|
362 |
mk_disc_exhaust_tac n exhaust_thm discI_thms)] |
3d520eec2746
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blanchet
parents:
49114
diff
changeset
|
363 |
end; |
49025 | 364 |
|
49118 | 365 |
val collapse_thms = |
49030 | 366 |
let |
367 |
fun mk_goal ctr disc sels = |
|
49114 | 368 |
let |
369 |
val prem = HOLogic.mk_Trueprop (betapply (disc, v)); |
|
370 |
val concl = |
|
371 |
mk_Trueprop_eq ((null sels ? swap) |
|
372 |
(Term.list_comb (ctr, map (fn sel => sel $ v) sels), v)); |
|
373 |
in |
|
374 |
if prem aconv concl then NONE |
|
375 |
else SOME (Logic.all v (Logic.mk_implies (prem, concl))) |
|
376 |
end; |
|
49030 | 377 |
val goals = map3 mk_goal ctrs discs selss; |
378 |
in |
|
49114 | 379 |
map4 (fn m => fn discD => fn sel_thms => Option.map (fn goal => |
49030 | 380 |
Skip_Proof.prove lthy [] [] goal (fn {context = ctxt, ...} => |
49118 | 381 |
mk_collapse_tac ctxt m discD sel_thms))) ms discD_thms sel_thmss goals |
49114 | 382 |
|> map_filter I |
49030 | 383 |
end; |
49025 | 384 |
|
49116
3d520eec2746
allow pseudo-definition of is_Cons in terms of is_Nil (and similarly for other two-constructor datatypes)
blanchet
parents:
49114
diff
changeset
|
385 |
val case_eq_thm = |
49031 | 386 |
let |
387 |
fun mk_core f sels = Term.list_comb (f, map (fn sel => sel $ v) sels); |
|
388 |
fun mk_rhs _ [f] [sels] = mk_core f sels |
|
389 |
| mk_rhs (disc :: discs) (f :: fs) (sels :: selss) = |
|
390 |
Const (@{const_name If}, HOLogic.boolT --> B --> B --> B) $ |
|
49114 | 391 |
betapply (disc, v) $ mk_core f sels $ mk_rhs discs fs selss; |
49043 | 392 |
val goal = mk_Trueprop_eq (caseofB_fs $ v, mk_rhs discs fs selss); |
49031 | 393 |
in |
394 |
Skip_Proof.prove lthy [] [] goal (fn {context = ctxt, ...} => |
|
49116
3d520eec2746
allow pseudo-definition of is_Cons in terms of is_Nil (and similarly for other two-constructor datatypes)
blanchet
parents:
49114
diff
changeset
|
395 |
mk_case_eq_tac ctxt exhaust_thm' case_thms disc_thmss' sel_thmss) |
49031 | 396 |
|> singleton (Proof_Context.export names_lthy lthy) |
397 |
end; |
|
49025 | 398 |
|
49033 | 399 |
val (case_cong_thm, weak_case_cong_thm) = |
49032 | 400 |
let |
401 |
fun mk_prem xctr xs f g = |
|
49045
7d9631754bba
minor fixes (for compatibility with existing datatype package)
blanchet
parents:
49044
diff
changeset
|
402 |
fold_rev Logic.all xs (Logic.mk_implies (mk_Trueprop_eq (w, xctr), |
49032 | 403 |
mk_Trueprop_eq (f, g))); |
49033 | 404 |
|
405 |
val v_eq_w = mk_Trueprop_eq (v, w); |
|
49043 | 406 |
val caseof_fs = mk_caseofB_term eta_fs; |
407 |
val caseof_gs = mk_caseofB_term eta_gs; |
|
49032 | 408 |
|
409 |
val goal = |
|
49033 | 410 |
Logic.list_implies (v_eq_w :: map4 mk_prem xctrs xss fs gs, |
411 |
mk_Trueprop_eq (caseof_fs $ v, caseof_gs $ w)); |
|
412 |
val goal_weak = |
|
413 |
Logic.mk_implies (v_eq_w, mk_Trueprop_eq (caseof_fs $ v, caseof_fs $ w)); |
|
49032 | 414 |
in |
49049 | 415 |
(Skip_Proof.prove lthy [] [] goal (fn _ => mk_case_cong_tac exhaust_thm' case_thms), |
49033 | 416 |
Skip_Proof.prove lthy [] [] goal_weak (K (etac arg_cong 1))) |
417 |
|> pairself (singleton (Proof_Context.export names_lthy lthy)) |
|
49032 | 418 |
end; |
49025 | 419 |
|
49044 | 420 |
val (split_thm, split_asm_thm) = |
49043 | 421 |
let |
49044 | 422 |
fun mk_conjunct xctr xs f_xs = |
49043 | 423 |
list_all_free xs (HOLogic.mk_imp (HOLogic.mk_eq (v, xctr), q $ f_xs)); |
49044 | 424 |
fun mk_disjunct xctr xs f_xs = |
425 |
list_exists_free xs (HOLogic.mk_conj (HOLogic.mk_eq (v, xctr), |
|
426 |
HOLogic.mk_not (q $ f_xs))); |
|
427 |
||
428 |
val lhs = q $ (mk_caseofB_term eta_fs $ v); |
|
429 |
||
49043 | 430 |
val goal = |
49044 | 431 |
mk_Trueprop_eq (lhs, Library.foldr1 HOLogic.mk_conj (map3 mk_conjunct xctrs xss xfs)); |
432 |
val goal_asm = |
|
433 |
mk_Trueprop_eq (lhs, HOLogic.mk_not (Library.foldr1 HOLogic.mk_disj |
|
434 |
(map3 mk_disjunct xctrs xss xfs))); |
|
435 |
||
436 |
val split_thm = |
|
49049 | 437 |
Skip_Proof.prove lthy [] [] goal |
49052 | 438 |
(fn _ => mk_split_tac exhaust_thm' case_thms inject_thmss distinct_thmsss) |
49044 | 439 |
|> singleton (Proof_Context.export names_lthy lthy) |
440 |
val split_asm_thm = |
|
441 |
Skip_Proof.prove lthy [] [] goal_asm (fn {context = ctxt, ...} => |
|
442 |
mk_split_asm_tac ctxt split_thm) |
|
443 |
|> singleton (Proof_Context.export names_lthy lthy) |
|
49043 | 444 |
in |
49044 | 445 |
(split_thm, split_asm_thm) |
49043 | 446 |
end; |
49025 | 447 |
|
49052 | 448 |
val notes = |
449 |
[(case_congN, [case_cong_thm]), |
|
49116
3d520eec2746
allow pseudo-definition of is_Cons in terms of is_Nil (and similarly for other two-constructor datatypes)
blanchet
parents:
49114
diff
changeset
|
450 |
(case_eqN, [case_eq_thm]), |
49052 | 451 |
(casesN, case_thms), |
49118 | 452 |
(collapseN, collapse_thms), |
49116
3d520eec2746
allow pseudo-definition of is_Cons in terms of is_Nil (and similarly for other two-constructor datatypes)
blanchet
parents:
49114
diff
changeset
|
453 |
(discsN, disc_thms), |
49053 | 454 |
(disc_exclusN, disc_exclus_thms), |
49116
3d520eec2746
allow pseudo-definition of is_Cons in terms of is_Nil (and similarly for other two-constructor datatypes)
blanchet
parents:
49114
diff
changeset
|
455 |
(disc_exhaustN, disc_exhaust_thms), |
49052 | 456 |
(distinctN, distinct_thms), |
457 |
(exhaustN, [exhaust_thm]), |
|
458 |
(injectN, (flat inject_thmss)), |
|
459 |
(nchotomyN, [nchotomy_thm]), |
|
460 |
(selsN, (flat sel_thmss)), |
|
461 |
(splitN, [split_thm]), |
|
462 |
(split_asmN, [split_asm_thm]), |
|
463 |
(weak_case_cong_thmsN, [weak_case_cong_thm])] |
|
49116
3d520eec2746
allow pseudo-definition of is_Cons in terms of is_Nil (and similarly for other two-constructor datatypes)
blanchet
parents:
49114
diff
changeset
|
464 |
|> filter_out (null o snd) |
49052 | 465 |
|> map (fn (thmN, thms) => |
466 |
((Binding.qualify true (Binding.name_of b) (Binding.name thmN), []), [(thms, [])])); |
|
49019 | 467 |
in |
49052 | 468 |
lthy |> Local_Theory.notes notes |> snd |
49019 | 469 |
end; |
49017 | 470 |
in |
49025 | 471 |
(goals, after_qed, lthy') |
49017 | 472 |
end; |
473 |
||
49111 | 474 |
fun wrap tacss = (fn (goalss, after_qed, lthy) => |
475 |
map2 (map2 (Skip_Proof.prove lthy [] [])) goalss tacss |
|
476 |
|> (fn thms => after_qed thms lthy)) oo |
|
477 |
prepare_wrap (singleton o Type_Infer_Context.infer_types) |
|
478 |
||
49114 | 479 |
val parse_bindings = Parse.$$$ "[" |-- Parse.list Parse.binding --| Parse.$$$ "]"; |
49057 | 480 |
val parse_bindingss = Parse.$$$ "[" |-- Parse.list parse_bindings --| Parse.$$$ "]"; |
49017 | 481 |
|
49074 | 482 |
val wrap_data_cmd = (fn (goalss, after_qed, lthy) => |
49019 | 483 |
Proof.theorem NONE after_qed (map (map (rpair [])) goalss) lthy) oo |
49074 | 484 |
prepare_wrap Syntax.read_term; |
49017 | 485 |
|
486 |
val _ = |
|
49074 | 487 |
Outer_Syntax.local_theory_to_proof @{command_spec "wrap_data"} "wraps an existing datatype" |
49023 | 488 |
(((Parse.$$$ "[" |-- Parse.list Parse.term --| Parse.$$$ "]") -- Parse.term -- |
49057 | 489 |
Scan.optional (parse_bindings -- Scan.optional parse_bindingss []) ([], [])) |
49074 | 490 |
>> wrap_data_cmd); |
49017 | 491 |
|
492 |
end; |