author | berghofe |
Fri, 11 Feb 2005 18:51:00 +0100 | |
changeset 15530 | 6f43714517ee |
parent 15457 | 1fbd4aba46e3 |
child 15531 | 08c8dad8e399 |
permissions | -rw-r--r-- |
4866 | 1 |
(* Title: HOL/Tools/typedef_package.ML |
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ID: $Id$ |
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Author: Markus Wenzel, TU Muenchen |
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Gordon/HOL-style type definitions. |
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*) |
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signature TYPEDEF_PACKAGE = |
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sig |
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val quiet_mode: bool ref |
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val add_typedecls: (bstring * string list * mixfix) list -> theory -> theory |
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val add_typedef_x: string -> bstring * string list * mixfix -> |
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string -> string list -> thm list -> tactic option -> theory -> theory |
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val add_typedef: bool -> string option -> bstring * string list * mixfix -> |
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string -> (bstring * bstring) option -> tactic -> theory -> theory * |
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{type_definition: thm, set_def: thm option, Rep: thm, Rep_inverse: thm, |
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Abs_inverse: thm, Rep_inject: thm, Abs_inject: thm, Rep_cases: thm, Abs_cases: thm, |
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Rep_induct: thm, Abs_induct: thm} |
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val add_typedef_i: bool -> string option -> bstring * string list * mixfix -> |
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term -> (bstring * bstring) option -> tactic -> theory -> theory * |
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{type_definition: thm, set_def: thm option, Rep: thm, Rep_inverse: thm, |
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Abs_inverse: thm, Rep_inject: thm, Abs_inject: thm, Rep_cases: thm, Abs_cases: thm, |
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Rep_induct: thm, Abs_induct: thm} |
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val typedef_proof: (bool * string) * (bstring * string list * mixfix) * string |
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* (string * string) option -> bool -> theory -> ProofHistory.T |
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val typedef_proof_i: (bool * string) * (bstring * string list * mixfix) * term |
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* (string * string) option -> bool -> theory -> ProofHistory.T |
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val setup: (theory -> theory) list |
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end; |
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structure TypedefPackage: TYPEDEF_PACKAGE = |
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struct |
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(** theory context references **) |
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val type_definitionN = "Typedef.type_definition"; |
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val Rep = thm "type_definition.Rep"; |
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val Rep_inverse = thm "type_definition.Rep_inverse"; |
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val Abs_inverse = thm "type_definition.Abs_inverse"; |
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val Rep_inject = thm "type_definition.Rep_inject"; |
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val Abs_inject = thm "type_definition.Abs_inject"; |
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val Rep_cases = thm "type_definition.Rep_cases"; |
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val Abs_cases = thm "type_definition.Abs_cases"; |
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val Rep_induct = thm "type_definition.Rep_induct"; |
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val Abs_induct = thm "type_definition.Abs_induct"; |
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(** theory data **) |
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structure TypedefArgs = |
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struct |
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val name = "HOL/typedef"; |
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type T = (typ * typ * string * string) Symtab.table; |
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val empty = Symtab.empty; |
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val copy = I; |
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val prep_ext = I; |
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val merge : T * T -> T = Symtab.merge op =; |
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fun print sg _ = (); |
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end; |
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structure TypedefData = TheoryDataFun(TypedefArgs); |
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fun put_typedef newT oldT Abs_name Rep_name thy = |
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TypedefData.put (Symtab.update_new |
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((fst (dest_Type newT), (newT, oldT, Abs_name, Rep_name)), |
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TypedefData.get thy)) thy; |
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(** type declarations **) |
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fun add_typedecls decls thy = |
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let |
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val full = Sign.full_name (Theory.sign_of thy); |
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fun arity_of (raw_name, args, mx) = |
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(full (Syntax.type_name raw_name mx), replicate (length args) HOLogic.typeS, HOLogic.typeS); |
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in |
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if can (Theory.assert_super HOL.thy) thy then |
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thy |
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|> PureThy.add_typedecls decls |
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|> Theory.add_arities_i (map arity_of decls) |
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else thy |> PureThy.add_typedecls decls |
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end; |
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(** type definitions **) |
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(* messages *) |
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val quiet_mode = ref false; |
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fun message s = if ! quiet_mode then () else writeln s; |
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(* prove_nonempty -- tactical version *) (*exception ERROR*) |
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fun prove_nonempty thy cset goal (witn1_tac, witn_names, witn_thms, witn2_tac) = |
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let |
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val is_def = Logic.is_equals o #prop o Thm.rep_thm; |
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Adapted to modified interface of PureThy.get_thm(s).
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val thms = PureThy.get_thmss thy (map (rpair None) witn_names) @ witn_thms; |
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val tac = |
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witn1_tac THEN |
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TRY (rewrite_goals_tac (filter is_def thms)) THEN |
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TRY (REPEAT_FIRST (resolve_tac (filter_out is_def thms))) THEN |
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if_none witn2_tac (TRY (ALLGOALS (CLASET' blast_tac))); |
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in |
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message ("Proving non-emptiness of set " ^ quote (string_of_cterm cset) ^ " ..."); |
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Tactic.prove (Theory.sign_of thy) [] [] goal (K tac) |
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end handle ERROR => error ("Failed to prove non-emptiness of " ^ quote (string_of_cterm cset)); |
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(* prepare_typedef *) |
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fun read_term sg used s = |
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renamed class "term" to "type" (actually "HOL.type");
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#1 (Thm.read_def_cterm (sg, K None, K None) used true (s, HOLogic.typeT)); |
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fun cert_term sg _ t = Thm.cterm_of sg t handle TERM (msg, _) => error msg; |
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fun err_in_typedef name = |
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error ("The error(s) above occurred in typedef " ^ quote name); |
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fun prepare_typedef prep_term def name (t, vs, mx) raw_set opt_morphs thy = |
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let |
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val _ = Theory.requires thy "Typedef" "typedefs"; |
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val sign = Theory.sign_of thy; |
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val full = Sign.full_name sign; |
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(*rhs*) |
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val full_name = full name; |
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val cset = prep_term sign vs raw_set; |
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val {T = setT, t = set, ...} = Thm.rep_cterm cset; |
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val rhs_tfrees = term_tfrees set; |
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val oldT = HOLogic.dest_setT setT handle TYPE _ => |
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error ("Not a set type: " ^ quote (Sign.string_of_typ sign setT)); |
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abtract non-emptiness statements (no longer use Eps);
wenzelm
parents:
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fun mk_nonempty A = |
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HOLogic.mk_Trueprop (HOLogic.mk_exists ("x", oldT, HOLogic.mk_mem (Free ("x", oldT), A))); |
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val goal = mk_nonempty set; |
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val vname = take_suffix Symbol.is_digit (Symbol.explode name) |
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|> apfst implode |> apsnd (#1 o Library.read_int); |
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val goal_pat = mk_nonempty (Var (vname, setT)); |
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(*lhs*) |
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12338
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wenzelm
parents:
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val lhs_tfrees = map (fn v => (v, if_none (assoc (rhs_tfrees, v)) HOLogic.typeS)) vs; |
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val tname = Syntax.type_name t mx; |
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val full_tname = full tname; |
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val newT = Type (full_tname, map TFree lhs_tfrees); |
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val (Rep_name, Abs_name) = if_none opt_morphs ("Rep_" ^ name, "Abs_" ^ name); |
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val setC = Const (full_name, setT); |
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val RepC = Const (full Rep_name, newT --> oldT); |
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val AbsC = Const (full Abs_name, oldT --> newT); |
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val x_new = Free ("x", newT); |
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val y_old = Free ("y", oldT); |
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val set' = if def then setC else set; |
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val typedef_name = "type_definition_" ^ name; |
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val typedefC = |
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Const (type_definitionN, (newT --> oldT) --> (oldT --> newT) --> setT --> HOLogic.boolT); |
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wenzelm
parents:
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diff
changeset
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val typedef_prop = |
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Logic.mk_implies (goal, HOLogic.mk_Trueprop (typedefC $ RepC $ AbsC $ set')); |
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fun typedef_result (theory, nonempty) = |
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theory |
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|> put_typedef newT oldT (full Abs_name) (full Rep_name) |
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|> add_typedecls [(t, vs, mx)] |
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|> Theory.add_consts_i |
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((if def then [(name, setT, NoSyn)] else []) @ |
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[(Rep_name, newT --> oldT, NoSyn), |
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(Abs_name, oldT --> newT, NoSyn)]) |
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|> (if def then (apsnd (Some o hd) oo (PureThy.add_defs_i false o map Thm.no_attributes)) |
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[Logic.mk_defpair (setC, set)] |
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else rpair None) |
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|>>> PureThy.add_axioms_i [((typedef_name, typedef_prop), |
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a27150cc8fa5
test: use SkipProof.make_thm instead of Thm.assume;
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parents:
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changeset
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[apsnd (fn cond_axm => Drule.standard (nonempty RS cond_axm))])] |
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|>> Theory.add_finals_i false [RepC, AbsC] |
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|> (fn (theory', (set_def, [type_definition])) => |
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let |
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fun make th = Drule.standard (th OF [type_definition]); |
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val (theory'', [Rep, Rep_inverse, Abs_inverse, Rep_inject, Abs_inject, |
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Rep_cases, Abs_cases, Rep_induct, Abs_induct]) = |
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wenzelm
parents:
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changeset
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theory' |
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|> Theory.add_path name |
de0f4a63baa5
renamed class "term" to "type" (actually "HOL.type");
wenzelm
parents:
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diff
changeset
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|> PureThy.add_thms |
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([((Rep_name, make Rep), []), |
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((Rep_name ^ "_inverse", make Rep_inverse), []), |
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((Abs_name ^ "_inverse", make Abs_inverse), []), |
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((Rep_name ^ "_inject", make Rep_inject), []), |
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((Abs_name ^ "_inject", make Abs_inject), []), |
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((Rep_name ^ "_cases", make Rep_cases), |
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[RuleCases.case_names [Rep_name], InductAttrib.cases_set_global full_name]), |
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((Abs_name ^ "_cases", make Abs_cases), |
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[RuleCases.case_names [Abs_name], InductAttrib.cases_type_global full_tname]), |
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((Rep_name ^ "_induct", make Rep_induct), |
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[RuleCases.case_names [Rep_name], InductAttrib.induct_set_global full_name]), |
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((Abs_name ^ "_induct", make Abs_induct), |
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12338
de0f4a63baa5
renamed class "term" to "type" (actually "HOL.type");
wenzelm
parents:
12043
diff
changeset
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201 |
[RuleCases.case_names [Abs_name], InductAttrib.induct_type_global full_tname])]) |
de0f4a63baa5
renamed class "term" to "type" (actually "HOL.type");
wenzelm
parents:
12043
diff
changeset
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202 |
|>> Theory.parent_path; |
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val result = {type_definition = type_definition, set_def = set_def, |
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Rep = Rep, Rep_inverse = Rep_inverse, Abs_inverse = Abs_inverse, |
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Rep_inject = Rep_inject, Abs_inject = Abs_inject, Rep_cases = Rep_cases, |
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Abs_cases = Abs_cases, Rep_induct = Rep_induct, Abs_induct = Abs_induct}; |
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in ((theory'', type_definition), result) end); |
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(* errors *) |
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fun show_names pairs = commas_quote (map fst pairs); |
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val illegal_vars = |
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if null (term_vars set) andalso null (term_tvars set) then [] |
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else ["Illegal schematic variable(s) on rhs"]; |
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val dup_lhs_tfrees = |
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(case duplicates lhs_tfrees of [] => [] |
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| dups => ["Duplicate type variables on lhs: " ^ show_names dups]); |
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val extra_rhs_tfrees = |
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(case gen_rems (op =) (rhs_tfrees, lhs_tfrees) of [] => [] |
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| extras => ["Extra type variables on rhs: " ^ show_names extras]); |
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val illegal_frees = |
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(case term_frees set of [] => [] |
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| xs => ["Illegal variables on rhs: " ^ show_names (map dest_Free xs)]); |
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val errs = illegal_vars @ dup_lhs_tfrees @ extra_rhs_tfrees @ illegal_frees; |
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11426
f280d4b29a2c
abtract non-emptiness statements (no longer use Eps);
wenzelm
parents:
10697
diff
changeset
|
231 |
val _ = if null errs then () else error (cat_lines errs); |
f280d4b29a2c
abtract non-emptiness statements (no longer use Eps);
wenzelm
parents:
10697
diff
changeset
|
232 |
|
f280d4b29a2c
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wenzelm
parents:
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diff
changeset
|
233 |
(*test theory errors now!*) |
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parents:
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changeset
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234 |
val test_thy = Theory.copy thy; |
11727
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test: use SkipProof.make_thm instead of Thm.assume;
wenzelm
parents:
11608
diff
changeset
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235 |
val _ = (test_thy, |
11822 | 236 |
setmp quick_and_dirty true (SkipProof.make_thm test_thy) goal) |> typedef_result; |
11426
f280d4b29a2c
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wenzelm
parents:
10697
diff
changeset
|
237 |
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11822 | 238 |
in (cset, goal, goal_pat, typedef_result) end |
11426
f280d4b29a2c
abtract non-emptiness statements (no longer use Eps);
wenzelm
parents:
10697
diff
changeset
|
239 |
handle ERROR => err_in_typedef name; |
4866 | 240 |
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241 |
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6383 | 242 |
(* add_typedef interfaces *) |
4866 | 243 |
|
11827 | 244 |
fun gen_typedef prep_term def name typ set opt_morphs tac1 names thms tac2 thy = |
6383 | 245 |
let |
11822 | 246 |
val (cset, goal, _, typedef_result) = |
247 |
prepare_typedef prep_term def name typ set opt_morphs thy; |
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11827 | 248 |
val non_empty = prove_nonempty thy cset goal (tac1, names, thms, tac2); |
11822 | 249 |
val ((thy', _), result) = (thy, non_empty) |> typedef_result; |
250 |
in (thy', result) end; |
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4866 | 251 |
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11827 | 252 |
fun sane_typedef prep_term def opt_name typ set opt_morphs tac = |
253 |
gen_typedef prep_term def |
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254 |
(if_none opt_name (#1 typ)) typ set opt_morphs all_tac [] [] (Some tac); |
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11822 | 255 |
|
256 |
fun add_typedef_x name typ set names thms tac = |
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11827 | 257 |
#1 o gen_typedef read_term true name typ set None (Tactic.rtac exI 1) names thms tac; |
11822 | 258 |
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259 |
val add_typedef = sane_typedef read_term; |
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260 |
val add_typedef_i = sane_typedef cert_term; |
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4866 | 261 |
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262 |
||
6383 | 263 |
(* typedef_proof interface *) |
264 |
||
13443 | 265 |
fun gen_typedef_proof prep_term ((def, name), typ, set, opt_morphs) int thy = |
11822 | 266 |
let |
267 |
val (_, goal, goal_pat, att_result) = |
|
13443 | 268 |
prepare_typedef prep_term def name typ set opt_morphs thy; |
11822 | 269 |
val att = #1 o att_result; |
12876
a70df1e5bf10
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12694
diff
changeset
|
270 |
in thy |> IsarThy.theorem_i Drule.internalK (("", [att]), (goal, ([goal_pat], []))) int end; |
6383 | 271 |
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272 |
val typedef_proof = gen_typedef_proof read_term; |
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273 |
val typedef_proof_i = gen_typedef_proof cert_term; |
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6357 | 274 |
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275 |
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6383 | 276 |
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15259 | 277 |
(** trivial code generator **) |
278 |
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279 |
fun typedef_codegen thy gr dep brack t = |
|
280 |
let |
|
281 |
fun mk_fun s T ts = |
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282 |
let |
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283 |
val (gr', _) = Codegen.invoke_tycodegen thy dep false (gr, T); |
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284 |
val (gr'', ps) = |
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285 |
foldl_map (Codegen.invoke_codegen thy dep true) (gr', ts); |
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286 |
val id = Codegen.mk_const_id (sign_of thy) s |
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287 |
in Some (gr'', Codegen.mk_app brack (Pretty.str id) ps) end; |
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288 |
fun get_name (Type (tname, _)) = tname |
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289 |
| get_name _ = ""; |
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290 |
fun lookup f T = if_none (apsome f (Symtab.lookup |
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291 |
(TypedefData.get thy, get_name T))) "" |
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292 |
in |
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293 |
(case strip_comb t of |
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294 |
(Const (s, Type ("fun", [T, U])), ts) => |
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295 |
if lookup #4 T = s andalso |
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296 |
is_none (Codegen.get_assoc_type thy (get_name T)) |
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297 |
then mk_fun s T ts |
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298 |
else if lookup #3 U = s andalso |
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299 |
is_none (Codegen.get_assoc_type thy (get_name U)) |
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300 |
then mk_fun s U ts |
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301 |
else None |
|
302 |
| _ => None) |
|
303 |
end; |
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304 |
||
305 |
fun mk_tyexpr [] s = Pretty.str s |
|
306 |
| mk_tyexpr [p] s = Pretty.block [p, Pretty.str (" " ^ s)] |
|
307 |
| mk_tyexpr ps s = Pretty.list "(" (") " ^ s) ps; |
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308 |
||
309 |
fun typedef_tycodegen thy gr dep brack (Type (s, Ts)) = |
|
310 |
(case Symtab.lookup (TypedefData.get thy, s) of |
|
311 |
None => None |
|
312 |
| Some (newT as Type (tname, Us), oldT, Abs_name, Rep_name) => |
|
313 |
if is_some (Codegen.get_assoc_type thy tname) then None else |
|
314 |
let |
|
315 |
val sg = sign_of thy; |
|
316 |
val Abs_id = Codegen.mk_const_id sg Abs_name; |
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317 |
val Rep_id = Codegen.mk_const_id sg Rep_name; |
|
318 |
val ty_id = Codegen.mk_type_id sg s; |
|
319 |
val (gr', qs) = foldl_map |
|
320 |
(Codegen.invoke_tycodegen thy dep (length Ts = 1)) (gr, Ts); |
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321 |
val gr'' = Graph.add_edge (Abs_id, dep) gr' handle Graph.UNDEF _ => |
|
322 |
let |
|
323 |
val (gr'', p :: ps) = foldl_map |
|
324 |
(Codegen.invoke_tycodegen thy Abs_id false) |
|
325 |
(Graph.add_edge (Abs_id, dep) |
|
326 |
(Graph.new_node (Abs_id, (None, "")) gr'), oldT :: Us); |
|
327 |
val s = |
|
328 |
Pretty.string_of (Pretty.block [Pretty.str "datatype ", |
|
329 |
mk_tyexpr ps ty_id, |
|
330 |
Pretty.str " =", Pretty.brk 1, Pretty.str (Abs_id ^ " of"), |
|
331 |
Pretty.brk 1, p, Pretty.str ";"]) ^ "\n\n" ^ |
|
332 |
Pretty.string_of (Pretty.block [Pretty.str ("fun " ^ Rep_id), |
|
333 |
Pretty.brk 1, Pretty.str ("(" ^ Abs_id), Pretty.brk 1, |
|
334 |
Pretty.str "x) = x;"]) ^ "\n\n" ^ |
|
335 |
(if "term_of" mem !Codegen.mode then |
|
336 |
Pretty.string_of (Pretty.block [Pretty.str "fun ", |
|
337 |
Codegen.mk_term_of sg false newT, Pretty.brk 1, |
|
338 |
Pretty.str ("(" ^ Abs_id), Pretty.brk 1, |
|
339 |
Pretty.str "x) =", Pretty.brk 1, |
|
340 |
Pretty.block [Pretty.str ("Const (\"" ^ Abs_name ^ "\","), |
|
341 |
Pretty.brk 1, Codegen.mk_type false (oldT --> newT), |
|
342 |
Pretty.str ")"], Pretty.str " $", Pretty.brk 1, |
|
343 |
Codegen.mk_term_of sg false oldT, Pretty.brk 1, |
|
344 |
Pretty.str "x;"]) ^ "\n\n" |
|
345 |
else "") ^ |
|
346 |
(if "test" mem !Codegen.mode then |
|
347 |
Pretty.string_of (Pretty.block [Pretty.str "fun ", |
|
348 |
Codegen.mk_gen sg false [] "" newT, Pretty.brk 1, |
|
349 |
Pretty.str "i =", Pretty.brk 1, |
|
350 |
Pretty.block [Pretty.str (Abs_id ^ " ("), |
|
351 |
Codegen.mk_gen sg false [] "" oldT, Pretty.brk 1, |
|
352 |
Pretty.str "i);"]]) ^ "\n\n" |
|
353 |
else "") |
|
354 |
in Graph.map_node Abs_id (K (None, s)) gr'' end |
|
355 |
in |
|
356 |
Some (gr'', mk_tyexpr qs ty_id) |
|
357 |
end) |
|
358 |
| typedef_tycodegen thy gr dep brack _ = None; |
|
359 |
||
360 |
val setup = |
|
361 |
[TypedefData.init, |
|
362 |
Codegen.add_codegen "typedef" typedef_codegen, |
|
363 |
Codegen.add_tycodegen "typedef" typedef_tycodegen]; |
|
364 |
||
365 |
||
366 |
||
6383 | 367 |
(** outer syntax **) |
368 |
||
6723 | 369 |
local structure P = OuterParse and K = OuterSyntax.Keyword in |
6383 | 370 |
|
6357 | 371 |
val typedeclP = |
12624 | 372 |
OuterSyntax.command "typedecl" "type declaration (HOL)" K.thy_decl |
12876
a70df1e5bf10
got rid of explicit marginal comments (now stripped earlier from input);
wenzelm
parents:
12694
diff
changeset
|
373 |
(P.type_args -- P.name -- P.opt_infix >> (fn ((vs, t), mx) => |
6357 | 374 |
Toplevel.theory (add_typedecls [(t, vs, mx)]))); |
375 |
||
6723 | 376 |
|
6383 | 377 |
val typedef_proof_decl = |
13443 | 378 |
Scan.optional (P.$$$ "(" |-- P.!!! |
379 |
(((P.$$$ "open" >> K false) -- Scan.option P.name || P.name >> (fn s => (true, Some s))) |
|
380 |
--| P.$$$ ")")) (true, None) -- |
|
11744 | 381 |
(P.type_args -- P.name) -- P.opt_infix -- (P.$$$ "=" |-- P.term) -- |
12876
a70df1e5bf10
got rid of explicit marginal comments (now stripped earlier from input);
wenzelm
parents:
12694
diff
changeset
|
382 |
Scan.option (P.$$$ "morphisms" |-- P.!!! (P.name -- P.name)); |
6357 | 383 |
|
13443 | 384 |
fun mk_typedef_proof ((((((def, opt_name), (vs, t)), mx), A), morphs)) = |
385 |
typedef_proof ((def, if_none opt_name (Syntax.type_name t mx)), (t, vs, mx), A, morphs); |
|
6357 | 386 |
|
387 |
val typedefP = |
|
6723 | 388 |
OuterSyntax.command "typedef" "HOL type definition (requires non-emptiness proof)" K.thy_goal |
6383 | 389 |
(typedef_proof_decl >> (Toplevel.print oo (Toplevel.theory_to_proof o mk_typedef_proof))); |
6357 | 390 |
|
6723 | 391 |
|
11744 | 392 |
val _ = OuterSyntax.add_keywords ["morphisms"]; |
6357 | 393 |
val _ = OuterSyntax.add_parsers [typedeclP, typedefP]; |
394 |
||
4866 | 395 |
end; |
6383 | 396 |
|
397 |
end; |