author | blanchet |
Fri, 01 Aug 2014 14:43:57 +0200 | |
changeset 57743 | 0af2d5dfb0ac |
parent 57182 | 79d43c510b84 |
child 58293 | 1d0343818ec0 |
permissions | -rw-r--r-- |
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(* Title: Pure/Isar/class_declaration.ML |
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Author: Florian Haftmann, TU Muenchen |
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Declaring classes and subclass relations. |
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*) |
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signature CLASS_DECLARATION = |
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sig |
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val class: binding -> class list -> |
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Element.context_i list -> theory -> string * local_theory |
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val class_cmd: binding -> xstring list -> |
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Element.context list -> theory -> string * local_theory |
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val prove_subclass: tactic -> class -> |
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local_theory -> local_theory |
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val subclass: class -> local_theory -> Proof.state |
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val subclass_cmd: xstring -> local_theory -> Proof.state |
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end; |
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structure Class_Declaration: CLASS_DECLARATION = |
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struct |
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(** class definitions **) |
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local |
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(* calculating class-related rules including canonical interpretation *) |
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fun calculate thy class sups base_sort param_map assm_axiom = |
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let |
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val empty_ctxt = Proof_Context.init_global thy; |
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(* instantiation of canonical interpretation *) |
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val aT = TFree (Name.aT, base_sort); |
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val param_map_const = (map o apsnd) Const param_map; |
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val param_map_inst = (map o apsnd) |
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(Const o apsnd (map_atyps (K aT))) param_map; |
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val const_morph = Element.inst_morphism thy |
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(Symtab.empty, Symtab.make param_map_inst); |
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val typ_morph = Element.inst_morphism thy |
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(Symtab.empty |> Symtab.update (Name.aT, TFree (Name.aT, [class])), Symtab.empty); |
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val (([raw_props], [(_, raw_inst_morph)], export_morph), _) = empty_ctxt |
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|> Expression.cert_goal_expression ([(class, (("", false), |
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Expression.Named param_map_const))], []); |
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val (props, inst_morph) = |
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if null param_map |
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then (raw_props |> map (Morphism.term typ_morph), |
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raw_inst_morph $> typ_morph) |
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else (raw_props, raw_inst_morph); (*FIXME proper handling in |
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locale.ML / expression.ML would be desirable*) |
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(* witness for canonical interpretation *) |
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val some_prop = try the_single props; |
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val some_witn = Option.map (fn prop => |
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let |
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val sup_axioms = map_filter (fst o Class.rules thy) sups; |
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val loc_intro_tac = |
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(case Locale.intros_of thy class of |
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(_, NONE) => all_tac |
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| (_, SOME intro) => ALLGOALS (rtac intro)); |
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val tac = loc_intro_tac |
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THEN ALLGOALS (Proof_Context.fact_tac empty_ctxt (sup_axioms @ the_list assm_axiom)); |
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in Element.prove_witness empty_ctxt prop tac end) some_prop; |
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val some_axiom = Option.map (Element.conclude_witness empty_ctxt) some_witn; |
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(* canonical interpretation *) |
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val base_morph = inst_morph |
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$> Morphism.binding_morphism "class_binding" (Binding.prefix false (Class.class_prefix class)) |
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$> Element.satisfy_morphism (the_list some_witn); |
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val eq_morph = Element.eq_morphism thy (Class.these_defs thy sups); |
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(* assm_intro *) |
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fun prove_assm_intro thm = |
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let |
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val ((_, [thm']), _) = Variable.import true [thm] empty_ctxt; |
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val const_eq_morph = |
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(case eq_morph of |
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SOME eq_morph => const_morph $> eq_morph |
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| NONE => const_morph); |
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val thm'' = Morphism.thm const_eq_morph thm'; |
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in |
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Goal.prove_sorry_global thy [] [] (Thm.prop_of thm'') |
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(fn {context = ctxt, ...} => ALLGOALS (Proof_Context.fact_tac ctxt [thm''])) |
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end; |
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val some_assm_intro = Option.map prove_assm_intro (fst (Locale.intros_of thy class)); |
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(* of_class *) |
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val of_class_prop_concl = Logic.mk_of_class (aT, class); |
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val of_class_prop = |
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(case some_prop of |
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NONE => of_class_prop_concl |
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| SOME prop => Logic.mk_implies (Morphism.term const_morph |
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((map_types o map_atyps) (K aT) prop), of_class_prop_concl)); |
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val sup_of_classes = map (snd o Class.rules thy) sups; |
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val loc_axiom_intros = map Drule.export_without_context_open (Locale.axioms_of thy class); |
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val axclass_intro = #intro (Axclass.get_info thy class); |
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val base_sort_trivs = Thm.of_sort (Thm.ctyp_of thy aT, base_sort); |
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val tac = |
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REPEAT (SOMEGOAL |
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(match_tac (axclass_intro :: sup_of_classes @ loc_axiom_intros @ base_sort_trivs) |
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ORELSE' assume_tac)); |
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val of_class = Goal.prove_sorry_global thy [] [] of_class_prop (K tac); |
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in (base_morph, eq_morph, export_morph, some_axiom, some_assm_intro, of_class) end; |
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(* reading and processing class specifications *) |
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fun prep_class_elems prep_decl thy sups raw_elems = |
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let |
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(* user space type system: only permits 'a type variable, improves towards 'a *) |
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val algebra = Sign.classes_of thy; |
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val inter_sort = curry (Sorts.inter_sort algebra); |
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val proto_base_sort = |
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if null sups then Sign.defaultS thy |
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else fold inter_sort (map (Class.base_sort thy) sups) []; |
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val base_constraints = (map o apsnd) |
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(map_type_tfree (K (TVar ((Name.aT, 0), proto_base_sort))) o fst o snd) |
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(Class.these_operations thy sups); |
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fun singleton_fixate tms = |
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let |
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val tfrees = fold Term.add_tfrees tms []; |
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val inferred_sort = |
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(fold o fold_types o fold_atyps) (fn TVar (_, S) => inter_sort S | _ => I) tms []; |
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val fixate_sort = |
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(case tfrees of |
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[] => inferred_sort |
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| [(a, S)] => |
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if a <> Name.aT then |
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error ("No type variable other than " ^ Name.aT ^ " allowed in class specification") |
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else if Sorts.sort_le algebra (S, inferred_sort) then S |
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else |
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error ("Type inference imposes additional sort constraint " ^ |
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Syntax.string_of_sort_global thy inferred_sort ^ |
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" of type parameter " ^ Name.aT ^ " of sort " ^ |
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Syntax.string_of_sort_global thy S) |
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| _ => error "Multiple type variables in class specification"); |
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val fixateT = TFree (Name.aT, fixate_sort); |
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in |
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(map o map_types o map_atyps) |
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(fn T as TVar (xi, _) => if Type_Infer.is_param xi then fixateT else T | T => T) tms |
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end; |
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fun after_infer_fixate tms = |
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let |
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val fixate_sort = |
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(fold o fold_types o fold_atyps) |
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(fn TVar (xi, S) => if Type_Infer.is_param xi then inter_sort S else I | _ => I) tms []; |
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in |
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149 |
(map o map_types o map_atyps) |
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(fn T as TVar (xi, _) => |
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if Type_Infer.is_param xi then Type_Infer.param 0 (Name.aT, fixate_sort) else T |
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| T => T) tms |
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end; |
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(* preprocessing elements, retrieving base sort from type-checked elements *) |
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val raw_supexpr = |
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(map (fn sup => (sup, (("", false), Expression.Positional []))) sups, []); |
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val init_class_body = |
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159 |
fold (Proof_Context.add_const_constraint o apsnd SOME) base_constraints |
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#> Class.redeclare_operations thy sups |
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#> Context.proof_map (Syntax_Phases.term_check 0 "singleton_fixate" (K singleton_fixate)); |
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val ((raw_supparams, _, raw_inferred_elems, _), _) = |
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163 |
Proof_Context.init_global thy |
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164 |
|> Context.proof_map (Syntax_Phases.term_check 0 "after_infer_fixate" (K after_infer_fixate)) |
32206 | 165 |
|> prep_decl raw_supexpr init_class_body raw_elems; |
38435 | 166 |
fun filter_element (Element.Fixes []) = NONE |
167 |
| filter_element (e as Element.Fixes _) = SOME e |
|
168 |
| filter_element (Element.Constrains []) = NONE |
|
169 |
| filter_element (e as Element.Constrains _) = SOME e |
|
170 |
| filter_element (Element.Assumes []) = NONE |
|
171 |
| filter_element (e as Element.Assumes _) = SOME e |
|
45421 | 172 |
| filter_element (Element.Defines _) = |
173 |
error ("\"defines\" element not allowed in class specification.") |
|
174 |
| filter_element (Element.Notes _) = |
|
175 |
error ("\"notes\" element not allowed in class specification."); |
|
38435 | 176 |
val inferred_elems = map_filter filter_element raw_inferred_elems; |
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177 |
fun fold_element_types f (Element.Fixes fxs) = fold (fn (_, SOME T, _) => f T) fxs |
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178 |
| fold_element_types f (Element.Constrains cnstrs) = fold (f o snd) cnstrs |
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| fold_element_types f (Element.Assumes assms) = fold (fold (fn (t, ts) => |
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180 |
fold_types f t #> (fold o fold_types) f ts) o snd) assms; |
45421 | 181 |
val base_sort = |
182 |
if null inferred_elems then proto_base_sort |
|
183 |
else |
|
184 |
(case (fold o fold_element_types) Term.add_tfreesT inferred_elems [] of |
|
185 |
[] => error "No type variable in class specification" |
|
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186 |
| [(_, sort)] => sort |
45421 | 187 |
| _ => error "Multiple type variables in class specification"); |
32206 | 188 |
val supparams = map (fn ((c, T), _) => |
189 |
(c, map_atyps (K (TFree (Name.aT, base_sort))) T)) raw_supparams; |
|
190 |
val supparam_names = map fst supparams; |
|
191 |
fun mk_param ((c, _), _) = Free (c, (the o AList.lookup (op =) supparams) c); |
|
192 |
val supexpr = (map (fn sup => (sup, (("", false), |
|
193 |
Expression.Positional (map (SOME o mk_param) (Locale.params_of thy sup))))) sups, |
|
194 |
map (fn (c, T) => (Binding.name c, SOME T, NoSyn)) supparams); |
|
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195 |
|
32206 | 196 |
in (base_sort, supparam_names, supexpr, inferred_elems) end; |
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|
197 |
|
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|
198 |
val cert_class_elems = prep_class_elems Expression.cert_declaration; |
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199 |
val read_class_elems = prep_class_elems Expression.cert_read_declaration; |
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200 |
|
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201 |
fun prep_class_spec prep_class prep_class_elems thy raw_supclasses raw_elems = |
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202 |
let |
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203 |
val thy_ctxt = Proof_Context.init_global thy; |
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204 |
|
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|
205 |
(* prepare import *) |
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206 |
val inter_sort = curry (Sorts.inter_sort (Sign.classes_of thy)); |
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207 |
val sups = Sign.minimize_sort thy (map (prep_class thy_ctxt) raw_supclasses); |
45431 | 208 |
val _ = |
209 |
(case filter_out (Class.is_class thy) sups of |
|
210 |
[] => () |
|
211 |
| no_classes => error ("No (proper) classes: " ^ commas_quote no_classes)); |
|
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212 |
val raw_supparams = (map o apsnd) (snd o snd) (Class.these_params thy sups); |
32206 | 213 |
val raw_supparam_names = map fst raw_supparams; |
45431 | 214 |
val _ = |
215 |
if has_duplicates (op =) raw_supparam_names then |
|
216 |
error ("Duplicate parameter(s) in superclasses: " ^ |
|
217 |
(commas_quote (duplicates (op =) raw_supparam_names))) |
|
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|
218 |
else (); |
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|
219 |
|
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|
220 |
(* infer types and base sort *) |
45431 | 221 |
val (base_sort, supparam_names, supexpr, inferred_elems) = prep_class_elems thy sups raw_elems; |
32206 | 222 |
val sup_sort = inter_sort base_sort sups; |
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|
223 |
|
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|
224 |
(* process elements as class specification *) |
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225 |
val class_ctxt = Class.begin sups base_sort thy_ctxt; |
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|
226 |
val ((_, _, syntax_elems, _), _) = class_ctxt |
29702 | 227 |
|> Expression.cert_declaration supexpr I inferred_elems; |
45431 | 228 |
fun check_vars e vs = |
229 |
if null vs then |
|
230 |
error ("No type variable in part of specification element " ^ |
|
231 |
Pretty.string_of (Pretty.chunks (Element.pretty_ctxt class_ctxt e))) |
|
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|
232 |
else (); |
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|
233 |
fun check_element (e as Element.Fixes fxs) = |
45431 | 234 |
List.app (fn (_, SOME T, _) => check_vars e (Term.add_tfreesT T [])) fxs |
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|
235 |
| check_element (e as Element.Assumes assms) = |
45431 | 236 |
List.app (fn (_, ts_pss) => |
237 |
List.app (fn (t, _) => check_vars e (Term.add_tfrees t [])) ts_pss) assms |
|
238 |
| check_element _ = (); |
|
239 |
val _ = List.app check_element syntax_elems; |
|
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|
240 |
fun fork_syn (Element.Fixes xs) = |
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|
241 |
fold_map (fn (c, ty, syn) => cons (c, syn) #> pair (c, ty, NoSyn)) xs |
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|
242 |
#>> Element.Fixes |
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|
243 |
| fork_syn x = pair x; |
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|
244 |
val (elems, global_syntax) = fold_map fork_syn syntax_elems []; |
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|
245 |
|
32713 | 246 |
in (((sups, supparam_names), (sup_sort, base_sort, supexpr)), (elems, global_syntax)) end; |
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|
247 |
|
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|
248 |
val cert_class_spec = prep_class_spec (K I) cert_class_elems; |
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249 |
val read_class_spec = prep_class_spec Proof_Context.read_class read_class_elems; |
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|
250 |
|
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|
251 |
|
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|
252 |
(* class establishment *) |
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|
253 |
|
32206 | 254 |
fun add_consts class base_sort sups supparam_names global_syntax thy = |
24968
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|
255 |
let |
29816 | 256 |
(*FIXME simplify*) |
32206 | 257 |
val supconsts = supparam_names |
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|
258 |
|> AList.make (snd o the o AList.lookup (op =) (Class.these_params thy sups)) |
25683 | 259 |
|> (map o apsnd o apsnd o map_atyps o K o TFree) (Name.aT, [class]); |
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|
260 |
val all_params = Locale.params_of thy class; |
32206 | 261 |
val raw_params = (snd o chop (length supparam_names)) all_params; |
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|
262 |
fun add_const ((raw_c, raw_ty), _) thy = |
25683 | 263 |
let |
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changeset
|
264 |
val b = Binding.name raw_c; |
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changeset
|
265 |
val c = Sign.full_name thy b; |
25683 | 266 |
val ty = map_atyps (K (TFree (Name.aT, base_sort))) raw_ty; |
267 |
val ty0 = Type.strip_sorts ty; |
|
268 |
val ty' = map_atyps (K (TFree (Name.aT, [class]))) ty0; |
|
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|
269 |
val syn = (the_default NoSyn o AList.lookup Binding.eq_name global_syntax) b; |
25683 | 270 |
in |
271 |
thy |
|
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|
272 |
|> Sign.declare_const_global ((b, ty0), syn) |
25683 | 273 |
|> snd |
42494 | 274 |
|> pair ((Variable.check_name b, ty), (c, ty')) |
25683 | 275 |
end; |
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|
276 |
in |
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class morphism stemming from locale interpretation
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changeset
|
277 |
thy |
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changeset
|
278 |
|> Sign.add_path (Class.class_prefix class) |
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|
279 |
|> fold_map add_const raw_params |
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|
280 |
||> Sign.restore_naming thy |
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|
281 |
|-> (fn params => pair (supconsts @ (map o apfst) fst params, params)) |
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|
282 |
end; |
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changeset
|
283 |
|
32206 | 284 |
fun adjungate_axclass bname class base_sort sups supsort supparam_names global_syntax thy = |
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changeset
|
285 |
let |
29816 | 286 |
(*FIXME simplify*) |
25683 | 287 |
fun globalize param_map = map_aterms |
288 |
(fn Free (v, ty) => Const ((fst o the o AList.lookup (op =) param_map) v, ty) |
|
289 |
| t => t); |
|
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|
290 |
val raw_pred = Locale.intros_of thy class |
25683 | 291 |
|> fst |
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renamed varify/unvarify operations to varify_global/unvarify_global to emphasize that these only work in a global situation;
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changeset
|
292 |
|> Option.map (Logic.unvarify_global o Logic.strip_imp_concl o Thm.prop_of); |
45431 | 293 |
fun get_axiom thy = |
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diff
changeset
|
294 |
(case #axioms (Axclass.get_info thy class) of |
45431 | 295 |
[] => NONE |
296 |
| [thm] => SOME thm); |
|
24968
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replaced Sign.add_consts_authentic by Sign.declare_const;
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changeset
|
297 |
in |
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replaced Sign.add_consts_authentic by Sign.declare_const;
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changeset
|
298 |
thy |
32206 | 299 |
|> add_consts class base_sort sups supparam_names global_syntax |
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more standard module name Axclass (according to file name);
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changeset
|
300 |
|-> (fn (param_map, params) => Axclass.define_class (bname, supsort) |
26518 | 301 |
(map (fst o snd) params) |
30211 | 302 |
[(Thm.empty_binding, Option.map (globalize param_map) raw_pred |> the_list)] |
25683 | 303 |
#> snd |
304 |
#> `get_axiom |
|
305 |
#-> (fn assm_axiom => fold (Sign.add_const_constraint o apsnd SOME o snd) params |
|
29526 | 306 |
#> pair (param_map, params, assm_axiom))) |
24968
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replaced Sign.add_consts_authentic by Sign.declare_const;
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changeset
|
307 |
end; |
f9bafc868847
replaced Sign.add_consts_authentic by Sign.declare_const;
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changeset
|
308 |
|
57181
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diff
changeset
|
309 |
fun gen_class prep_class_spec b raw_supclasses raw_elems thy = |
24748 | 310 |
let |
36635
080b755377c0
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diff
changeset
|
311 |
val class = Sign.full_name thy b; |
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5bf71b4da706
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changeset
|
312 |
val prefix = Binding.qualify true "class"; |
32206 | 313 |
val (((sups, supparam_names), (supsort, base_sort, supexpr)), (elems, global_syntax)) = |
314 |
prep_class_spec thy raw_supclasses raw_elems; |
|
24218 | 315 |
in |
316 |
thy |
|
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changeset
|
317 |
|> Expression.add_locale b (prefix b) supexpr elems |
33671 | 318 |
|> snd |> Local_Theory.exit_global |
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changeset
|
319 |
|> adjungate_axclass b class base_sort sups supsort supparam_names global_syntax |
29526 | 320 |
|-> (fn (param_map, params, assm_axiom) => |
29547 | 321 |
`(fn thy => calculate thy class sups base_sort param_map assm_axiom) |
52636 | 322 |
#-> (fn (base_morph, eq_morph, export_morph, some_axiom, some_assm_intro, of_class) => |
38107 | 323 |
Context.theory_map (Locale.add_registration (class, base_morph) |
324 |
(Option.map (rpair true) eq_morph) export_morph) |
|
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changeset
|
325 |
#> Class.register class sups params base_sort base_morph export_morph some_axiom some_assm_intro of_class |
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changeset
|
326 |
#> Global_Theory.store_thm (prefix (Binding.qualified_name (class ^ ".of_class.intro")), of_class))) |
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changeset
|
327 |
|> snd |
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changeset
|
328 |
|> Named_Target.init class |
25038 | 329 |
|> pair class |
24218 | 330 |
end; |
331 |
||
332 |
in |
|
333 |
||
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29439
diff
changeset
|
334 |
val class = gen_class cert_class_spec; |
26518 | 335 |
val class_cmd = gen_class read_class_spec; |
24218 | 336 |
|
337 |
end; (*local*) |
|
338 |
||
339 |
||
45421 | 340 |
|
29358 | 341 |
(** subclass relations **) |
25462 | 342 |
|
29358 | 343 |
local |
25462 | 344 |
|
57181
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haftmann
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diff
changeset
|
345 |
fun gen_subclass prep_class do_proof raw_sup lthy = |
25462 | 346 |
let |
42360 | 347 |
val thy = Proof_Context.theory_of lthy; |
29558 | 348 |
val proto_sup = prep_class thy raw_sup; |
57182 | 349 |
val proto_sub = case Named_Target.class_of lthy of |
350 |
SOME class => class |
|
351 |
| NONE => error "Not in a class target"; |
|
51685
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diff
changeset
|
352 |
val (sub, sup) = Axclass.cert_classrel thy (proto_sub, proto_sup); |
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changeset
|
353 |
|
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changeset
|
354 |
val expr = ([(sup, (("", false), Expression.Positional []))], []); |
29558 | 355 |
val (([props], deps, export), goal_ctxt) = |
29509
1ff0f3f08a7b
migrated class package to new locale implementation
haftmann
parents:
29439
diff
changeset
|
356 |
Expression.cert_goal_expression expr lthy; |
29526 | 357 |
val some_prop = try the_single props; |
29558 | 358 |
val some_dep_morph = try the_single (map snd deps); |
359 |
fun after_qed some_wit = |
|
54866
7b9a67cbd48f
self-contained formulation of subclass command, avoiding hard-wired Named_Target.init
haftmann
parents:
54742
diff
changeset
|
360 |
Class.register_subclass (sub, sup) some_dep_morph some_wit export; |
29558 | 361 |
in do_proof after_qed some_prop goal_ctxt end; |
25485 | 362 |
|
29575
41d604e59e93
improved and corrected reading of class specs -- still draft version
haftmann
parents:
29558
diff
changeset
|
363 |
fun user_proof after_qed some_prop = |
41d604e59e93
improved and corrected reading of class specs -- still draft version
haftmann
parents:
29558
diff
changeset
|
364 |
Element.witness_proof (after_qed o try the_single o the_single) |
41d604e59e93
improved and corrected reading of class specs -- still draft version
haftmann
parents:
29558
diff
changeset
|
365 |
[the_list some_prop]; |
25485 | 366 |
|
29575
41d604e59e93
improved and corrected reading of class specs -- still draft version
haftmann
parents:
29558
diff
changeset
|
367 |
fun tactic_proof tac after_qed some_prop ctxt = |
41d604e59e93
improved and corrected reading of class specs -- still draft version
haftmann
parents:
29558
diff
changeset
|
368 |
after_qed (Option.map |
41d604e59e93
improved and corrected reading of class specs -- still draft version
haftmann
parents:
29558
diff
changeset
|
369 |
(fn prop => Element.prove_witness ctxt prop tac) some_prop) ctxt; |
28666 | 370 |
|
29358 | 371 |
in |
28666 | 372 |
|
57181
2d13bf9ea77b
dropped obscure and unused ad-hoc before_exit hook for named targets
haftmann
parents:
56921
diff
changeset
|
373 |
fun prove_subclass tac = gen_subclass (K I) (tactic_proof tac); |
54882 | 374 |
|
375 |
fun subclass x = gen_subclass (K I) user_proof x; |
|
376 |
fun subclass_cmd x = |
|
377 |
gen_subclass (Proof_Context.read_class o Proof_Context.init_global) user_proof x; |
|
25462 | 378 |
|
29358 | 379 |
end; (*local*) |
380 |
||
24218 | 381 |
end; |