author | wenzelm |
Wed, 26 Sep 2007 11:27:46 +0200 | |
changeset 24719 | 21d1cdab2d8c |
parent 24694 | 54f06f7feefa |
child 24765 | 3128ccd9121f |
permissions | -rw-r--r-- |
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(* Title: Pure/variable.ML |
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ID: $Id$ |
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Author: Makarius |
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Fixed type/term variables and polymorphic term abbreviations. |
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*) |
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signature VARIABLE = |
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sig |
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val is_body: Proof.context -> bool |
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val set_body: bool -> Proof.context -> Proof.context |
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val restore_body: Proof.context -> Proof.context -> Proof.context |
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val names_of: Proof.context -> Name.context |
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val fixes_of: Proof.context -> (string * string) list |
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val binds_of: Proof.context -> (typ * term) Vartab.table |
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val constraints_of: Proof.context -> typ Vartab.table * sort Vartab.table |
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val is_declared: Proof.context -> string -> bool |
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val is_fixed: Proof.context -> string -> bool |
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val newly_fixed: Proof.context -> Proof.context -> string -> bool |
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val add_fixed: Proof.context -> term -> (string * typ) list -> (string * typ) list |
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val default_type: Proof.context -> string -> typ option |
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val def_type: Proof.context -> bool -> indexname -> typ option |
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val def_sort: Proof.context -> indexname -> sort option |
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val declare_constraints: term -> Proof.context -> Proof.context |
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val declare_internal: term -> Proof.context -> Proof.context |
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val declare_term: term -> Proof.context -> Proof.context |
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val declare_prf: Proofterm.proof -> Proof.context -> Proof.context |
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val declare_thm: thm -> Proof.context -> Proof.context |
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val thm_context: thm -> Proof.context |
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val variant_frees: Proof.context -> term list -> (string * 'a) list -> (string * 'a) list |
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val add_binds: (indexname * term option) list -> Proof.context -> Proof.context |
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val expand_binds: Proof.context -> term -> term |
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val add_fixes: string list -> Proof.context -> string list * Proof.context |
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val add_fixes_direct: string list -> Proof.context -> Proof.context |
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val auto_fixes: term -> Proof.context -> Proof.context |
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val variant_fixes: string list -> Proof.context -> string list * Proof.context |
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val invent_types: sort list -> Proof.context -> (string * sort) list * Proof.context |
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val export_terms: Proof.context -> Proof.context -> term list -> term list |
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val exportT_terms: Proof.context -> Proof.context -> term list -> term list |
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val exportT: Proof.context -> Proof.context -> thm list -> thm list |
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val export_prf: Proof.context -> Proof.context -> Proofterm.proof -> Proofterm.proof |
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val export: Proof.context -> Proof.context -> thm list -> thm list |
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val export_morphism: Proof.context -> Proof.context -> morphism |
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val importT_inst: term list -> Proof.context -> ((indexname * sort) * typ) list * Proof.context |
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val import_inst: bool -> term list -> Proof.context -> |
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(((indexname * sort) * typ) list * ((indexname * typ) * term) list) * Proof.context |
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val importT_terms: term list -> Proof.context -> term list * Proof.context |
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val import_terms: bool -> term list -> Proof.context -> term list * Proof.context |
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val importT_thms: thm list -> Proof.context -> (ctyp list * thm list) * Proof.context |
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val import_prf: bool -> Proofterm.proof -> Proof.context -> Proofterm.proof * Proof.context |
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val import_thms: bool -> thm list -> Proof.context -> |
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((ctyp list * cterm list) * thm list) * Proof.context |
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val tradeT: (Proof.context -> thm list -> thm list) -> Proof.context -> thm list -> thm list |
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val trade: (Proof.context -> thm list -> thm list) -> Proof.context -> thm list -> thm list |
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val focus: cterm -> Proof.context -> (cterm list * cterm) * Proof.context |
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val focus_subgoal: int -> thm -> Proof.context -> (cterm list * cterm) * Proof.context |
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val warn_extra_tfrees: Proof.context -> Proof.context -> unit |
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val polymorphic_types: Proof.context -> term list -> (indexname * sort) list * term list |
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val polymorphic: Proof.context -> term list -> term list |
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end; |
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structure Variable: VARIABLE = |
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struct |
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(** local context data **) |
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datatype data = Data of |
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{is_body: bool, (*inner body mode*) |
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names: Name.context, (*type/term variable names*) |
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fixes: (string * string) list, (*term fixes -- extern/intern*) |
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binds: (typ * term) Vartab.table, (*term bindings*) |
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type_occs: string list Symtab.table, (*type variables -- possibly within term variables*) |
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constraints: |
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typ Vartab.table * (*type constraints*) |
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sort Vartab.table}; (*default sorts*) |
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fun make_data (is_body, names, fixes, binds, type_occs, constraints) = |
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Data {is_body = is_body, names = names, fixes = fixes, binds = binds, |
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type_occs = type_occs, constraints = constraints}; |
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structure Data = ProofDataFun |
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( |
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type T = data; |
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fun init thy = |
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make_data (false, Name.context, [], Vartab.empty, Symtab.empty, (Vartab.empty, Vartab.empty)); |
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); |
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fun map_data f = |
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Data.map (fn Data {is_body, names, fixes, binds, type_occs, constraints} => |
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make_data (f (is_body, names, fixes, binds, type_occs, constraints))); |
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fun map_names f = map_data (fn (is_body, names, fixes, binds, type_occs, constraints) => |
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(is_body, f names, fixes, binds, type_occs, constraints)); |
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fun map_fixes f = map_data (fn (is_body, names, fixes, binds, type_occs, constraints) => |
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(is_body, names, f fixes, binds, type_occs, constraints)); |
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fun map_binds f = map_data (fn (is_body, names, fixes, binds, type_occs, constraints) => |
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(is_body, names, fixes, f binds, type_occs, constraints)); |
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fun map_type_occs f = map_data (fn (is_body, names, fixes, binds, type_occs, constraints) => |
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(is_body, names, fixes, binds, f type_occs, constraints)); |
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fun map_constraints f = map_data (fn (is_body, names, fixes, binds, type_occs, constraints) => |
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(is_body, names, fixes, binds, type_occs, f constraints)); |
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fun rep_data ctxt = Data.get ctxt |> (fn Data args => args); |
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val is_body = #is_body o rep_data; |
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fun set_body b = map_data (fn (_, names, fixes, binds, type_occs, constraints) => |
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(b, names, fixes, binds, type_occs, constraints)); |
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fun restore_body ctxt = set_body (is_body ctxt); |
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val names_of = #names o rep_data; |
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val fixes_of = #fixes o rep_data; |
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val binds_of = #binds o rep_data; |
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val type_occs_of = #type_occs o rep_data; |
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val constraints_of = #constraints o rep_data; |
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val is_declared = Name.is_declared o names_of; |
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fun is_fixed ctxt x = exists (fn (_, y) => x = y) (fixes_of ctxt); |
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fun newly_fixed inner outer x = is_fixed inner x andalso not (is_fixed outer x); |
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fun add_fixed ctxt = Term.fold_aterms |
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(fn Free (x, T) => if is_fixed ctxt x then insert (op =) (x, T) else I | _ => I); |
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(** declarations **) |
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(* default sorts and types *) |
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fun default_type ctxt x = Vartab.lookup (#1 (constraints_of ctxt)) (x, ~1); |
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fun def_type ctxt pattern xi = |
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let val {binds, constraints = (types, _), ...} = rep_data ctxt in |
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(case Vartab.lookup types xi of |
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NONE => |
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if pattern then NONE |
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else Vartab.lookup binds xi |> Option.map (TypeInfer.polymorphicT o #1) |
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| some => some) |
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end; |
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val def_sort = Vartab.lookup o #2 o constraints_of; |
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(* names *) |
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val declare_type_names = map_names o |
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fold_types (fold_atyps (fn TFree (a, _) => Name.declare a | _ => I)); |
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fun declare_names t = |
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declare_type_names t #> |
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map_names (fold_aterms (fn Free (x, _) => Name.declare x | _ => I) t); |
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(* type occurrences *) |
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fun decl_type_occsT T = fold_atyps (fn TFree (a, _) => Symtab.default (a, []) | _ => I) T; |
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val decl_type_occs = fold_term_types |
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(fn Free (x, _) => fold_atyps (fn TFree (a, _) => Symtab.insert_list (op =) (a, x) | _ => I) |
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| _ => decl_type_occsT); |
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val declare_type_occsT = map_type_occs o fold_types decl_type_occsT; |
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val declare_type_occs = map_type_occs o decl_type_occs; |
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(* constraints *) |
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fun constrain_tvar (xi, S) = |
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if S = dummyS then Vartab.delete_safe xi else Vartab.update (xi, S); |
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fun declare_constraints t = map_constraints (fn (types, sorts) => |
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let |
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val types' = fold_aterms |
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(fn Free (x, T) => Vartab.update ((x, ~1), T) |
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| Var v => Vartab.update v |
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| _ => I) t types; |
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val sorts' = fold_types (fold_atyps |
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(fn TFree (x, S) => constrain_tvar ((x, ~1), S) |
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| TVar v => constrain_tvar v |
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| _ => I)) t sorts; |
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in (types', sorts') end) |
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#> declare_type_occsT t |
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#> declare_type_names t; |
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(* common declarations *) |
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fun declare_internal t = |
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declare_names t #> |
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declare_type_occs t; |
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fun declare_term t = |
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declare_internal t #> |
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declare_constraints t; |
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val declare_prf = Proofterm.fold_proof_terms declare_internal (declare_internal o Logic.mk_type); |
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val declare_thm = Thm.fold_terms declare_internal; |
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fun thm_context th = declare_thm th (ProofContext.init (Thm.theory_of_thm th)); |
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(* renaming term/type frees *) |
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fun variant_frees ctxt ts frees = |
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let |
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val names = names_of (fold declare_names ts ctxt); |
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val xs = fst (Name.variants (map #1 frees) names); |
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in xs ~~ map snd frees end; |
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(** term bindings **) |
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fun add_bind (xi, NONE) = map_binds (Vartab.delete_safe xi) |
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| add_bind ((x, i), SOME t) = |
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let |
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val T = Term.fastype_of t; |
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val t' = |
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if null (Term.hidden_polymorphism t T) then t |
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else Var ((x ^ "_has_extra_type_vars_on_rhs", i), T); |
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in declare_term t' #> map_binds (Vartab.update ((x, i), (T, t'))) end; |
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val add_binds = fold add_bind; |
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fun expand_binds ctxt = |
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let |
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val binds = binds_of ctxt; |
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val get = fn Var (xi, _) => Vartab.lookup binds xi | _ => NONE; |
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in Envir.beta_norm o Envir.expand_term get end; |
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20303 | 233 |
|
234 |
||
235 |
||
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changeset
|
236 |
(** fixes **) |
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changeset
|
237 |
|
20084 | 238 |
local |
239 |
||
19911
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diff
changeset
|
240 |
fun no_dups [] = () |
300bc6ce970d
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diff
changeset
|
241 |
| no_dups dups = error ("Duplicate fixed variable(s): " ^ commas_quote dups); |
300bc6ce970d
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diff
changeset
|
242 |
|
20102 | 243 |
fun new_fixes names' xs xs' = |
244 |
map_names (K names') #> |
|
245 |
map_fixes (fn fixes => (rev (xs ~~ xs') @ fixes)) #> |
|
20162 | 246 |
fold (declare_constraints o Syntax.free) xs' #> |
20084 | 247 |
pair xs'; |
248 |
||
249 |
in |
|
250 |
||
19911
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diff
changeset
|
251 |
fun add_fixes xs ctxt = |
300bc6ce970d
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|
252 |
let |
300bc6ce970d
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|
253 |
val _ = |
20084 | 254 |
(case filter (can Name.dest_skolem) xs of [] => () |
19911
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changeset
|
255 |
| bads => error ("Illegal internal Skolem constant(s): " ^ commas_quote bads)); |
20084 | 256 |
val _ = no_dups (duplicates (op =) xs); |
257 |
val (ys, zs) = split_list (fixes_of ctxt); |
|
20102 | 258 |
val names = names_of ctxt; |
20084 | 259 |
val (xs', names') = |
20149 | 260 |
if is_body ctxt then Name.variants xs names |>> map Name.skolem |
20084 | 261 |
else (no_dups (xs inter_string ys); no_dups (xs inter_string zs); |
262 |
(xs, fold Name.declare xs names)); |
|
20102 | 263 |
in ctxt |> new_fixes names' xs xs' end; |
19911
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parents:
19899
diff
changeset
|
264 |
|
20797
c1f0bc7e7d80
renamed Variable.invent_fixes to Variable.variant_fixes;
wenzelm
parents:
20579
diff
changeset
|
265 |
fun variant_fixes raw_xs ctxt = |
20084 | 266 |
let |
20102 | 267 |
val names = names_of ctxt; |
20149 | 268 |
val xs = map Name.clean raw_xs; |
269 |
val (xs', names') = Name.variants xs names |>> map Name.skolem; |
|
20102 | 270 |
in ctxt |> new_fixes names' xs xs' end; |
20084 | 271 |
|
272 |
end; |
|
19911
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parents:
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diff
changeset
|
273 |
|
20251 | 274 |
|
275 |
fun add_fixes_direct xs ctxt = ctxt |
|
276 |
|> set_body false |
|
277 |
|> (snd o add_fixes xs) |
|
278 |
|> restore_body ctxt; |
|
279 |
||
280 |
fun fix_frees t ctxt = ctxt |
|
281 |
|> add_fixes_direct |
|
282 |
(rev (fold_aterms (fn Free (x, _) => |
|
21369 | 283 |
if is_fixed ctxt x then I else insert (op =) x | _ => I) t [])); |
284 |
||
285 |
fun auto_fixes t ctxt = |
|
286 |
(if is_body ctxt then ctxt else fix_frees t ctxt) |
|
20251 | 287 |
|> declare_term t; |
288 |
||
19911
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parents:
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diff
changeset
|
289 |
fun invent_types Ss ctxt = |
300bc6ce970d
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parents:
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diff
changeset
|
290 |
let |
20102 | 291 |
val tfrees = Name.invents (names_of ctxt) "'a" (length Ss) ~~ Ss; |
20162 | 292 |
val ctxt' = fold (declare_constraints o Logic.mk_type o TFree) tfrees ctxt; |
19911
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parents:
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diff
changeset
|
293 |
in (tfrees, ctxt') end; |
300bc6ce970d
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parents:
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diff
changeset
|
294 |
|
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
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parents:
19899
diff
changeset
|
295 |
|
300bc6ce970d
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parents:
19899
diff
changeset
|
296 |
|
22671 | 297 |
(** export -- generalize type/term variables (beware of closure sizes) **) |
19911
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wenzelm
parents:
19899
diff
changeset
|
298 |
|
300bc6ce970d
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diff
changeset
|
299 |
fun export_inst inner outer = |
300bc6ce970d
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parents:
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diff
changeset
|
300 |
let |
20162 | 301 |
val declared_outer = is_declared outer; |
19911
300bc6ce970d
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wenzelm
parents:
19899
diff
changeset
|
302 |
val fixes_inner = fixes_of inner; |
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
303 |
val fixes_outer = fixes_of outer; |
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
304 |
|
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
305 |
val gen_fixes = map #2 (Library.take (length fixes_inner - length fixes_outer, fixes_inner)); |
20162 | 306 |
val still_fixed = not o member (op =) gen_fixes; |
22671 | 307 |
|
308 |
val type_occs_inner = type_occs_of inner; |
|
309 |
fun gen_fixesT ts = |
|
19911
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
310 |
Symtab.fold (fn (a, xs) => |
20162 | 311 |
if declared_outer a orelse exists still_fixed xs |
22671 | 312 |
then I else cons a) (fold decl_type_occs ts type_occs_inner) []; |
19911
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
313 |
in (gen_fixesT, gen_fixes) end; |
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
314 |
|
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
315 |
fun exportT_inst inner outer = #1 (export_inst inner outer); |
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
316 |
|
22671 | 317 |
fun exportT_terms inner outer = |
318 |
let val mk_tfrees = exportT_inst inner outer in |
|
319 |
fn ts => ts |> map |
|
320 |
(TermSubst.generalize (mk_tfrees ts, []) |
|
321 |
(fold (Term.fold_types Term.maxidx_typ) ts ~1 + 1)) |
|
322 |
end; |
|
19911
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
323 |
|
22671 | 324 |
fun export_terms inner outer = |
325 |
let val (mk_tfrees, tfrees) = export_inst inner outer in |
|
326 |
fn ts => ts |> map |
|
327 |
(TermSubst.generalize (mk_tfrees ts, tfrees) |
|
328 |
(fold Term.maxidx_term ts ~1 + 1)) |
|
329 |
end; |
|
19911
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
330 |
|
20303 | 331 |
fun export_prf inner outer prf = |
332 |
let |
|
22671 | 333 |
val (mk_tfrees, frees) = export_inst (declare_prf prf inner) outer; |
334 |
val tfrees = mk_tfrees []; |
|
20303 | 335 |
val idx = Proofterm.maxidx_proof prf ~1 + 1; |
22671 | 336 |
val gen_term = TermSubst.generalize_option (tfrees, frees) idx; |
337 |
val gen_typ = TermSubst.generalizeT_option tfrees idx; |
|
20303 | 338 |
in Proofterm.map_proof_terms_option gen_term gen_typ prf end; |
339 |
||
22671 | 340 |
|
341 |
fun gen_export (mk_tfrees, frees) ths = |
|
19911
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
342 |
let |
22671 | 343 |
val tfrees = mk_tfrees (map Thm.full_prop_of ths); |
344 |
val maxidx = fold Thm.maxidx_thm ths ~1; |
|
345 |
in map (Thm.generalize (tfrees, frees) (maxidx + 1)) ths end; |
|
19911
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
346 |
|
22671 | 347 |
fun exportT inner outer = gen_export (exportT_inst inner outer, []); |
348 |
fun export inner outer = gen_export (export_inst inner outer); |
|
19911
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
349 |
|
21522 | 350 |
fun export_morphism inner outer = |
351 |
let |
|
352 |
val fact = export inner outer; |
|
353 |
val term = singleton (export_terms inner outer); |
|
354 |
val typ = Logic.type_map term; |
|
355 |
in Morphism.morphism {name = I, var = I, typ = typ, term = term, fact = fact} end; |
|
19911
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
356 |
|
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
357 |
|
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
358 |
(** import -- fix schematic type/term variables **) |
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
359 |
|
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
360 |
fun importT_inst ts ctxt = |
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
361 |
let |
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
362 |
val tvars = rev (fold Term.add_tvars ts []); |
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
363 |
val (tfrees, ctxt') = invent_types (map #2 tvars) ctxt; |
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
364 |
in (tvars ~~ map TFree tfrees, ctxt') end; |
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
365 |
|
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
366 |
fun import_inst is_open ts ctxt = |
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
367 |
let |
20198 | 368 |
val ren = if is_open then I else Name.internal; |
19911
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
369 |
val (instT, ctxt') = importT_inst ts ctxt; |
20509 | 370 |
val vars = map (apsnd (TermSubst.instantiateT instT)) (rev (fold Term.add_vars ts [])); |
20797
c1f0bc7e7d80
renamed Variable.invent_fixes to Variable.variant_fixes;
wenzelm
parents:
20579
diff
changeset
|
371 |
val (xs, ctxt'') = variant_fixes (map (ren o #1 o #1) vars) ctxt'; |
19911
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
372 |
val inst = vars ~~ map Free (xs ~~ map #2 vars); |
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
373 |
in ((instT, inst), ctxt'') end; |
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
374 |
|
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
375 |
fun importT_terms ts ctxt = |
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
376 |
let val (instT, ctxt') = importT_inst ts ctxt |
20509 | 377 |
in (map (TermSubst.instantiate (instT, [])) ts, ctxt') end; |
19911
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
378 |
|
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
379 |
fun import_terms is_open ts ctxt = |
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
380 |
let val (inst, ctxt') = import_inst is_open ts ctxt |
20509 | 381 |
in (map (TermSubst.instantiate inst) ts, ctxt') end; |
19911
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
382 |
|
22601 | 383 |
fun importT_thms ths ctxt = |
19911
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
384 |
let |
21522 | 385 |
val thy = ProofContext.theory_of ctxt; |
19911
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
386 |
val certT = Thm.ctyp_of thy; |
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
387 |
val (instT, ctxt') = importT_inst (map Thm.full_prop_of ths) ctxt; |
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
388 |
val instT' = map (fn (v, T) => (certT (TVar v), certT T)) instT; |
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
389 |
val ths' = map (Thm.instantiate (instT', [])) ths; |
20220 | 390 |
in ((map #2 instT', ths'), ctxt') end; |
19911
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
391 |
|
20303 | 392 |
fun import_prf is_open prf ctxt = |
393 |
let |
|
394 |
val ts = rev (Proofterm.fold_proof_terms cons (cons o Logic.mk_type) prf []); |
|
395 |
val (insts, ctxt') = import_inst is_open ts ctxt; |
|
396 |
in (Proofterm.instantiate insts prf, ctxt') end; |
|
397 |
||
22568
ed7aa5a350ef
renamed Variable.import to import_thms (avoid clash with Alice keywords);
wenzelm
parents:
21799
diff
changeset
|
398 |
fun import_thms is_open ths ctxt = |
19911
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
399 |
let |
21522 | 400 |
val thy = ProofContext.theory_of ctxt; |
19911
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
401 |
val cert = Thm.cterm_of thy; |
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
402 |
val certT = Thm.ctyp_of thy; |
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
403 |
val ((instT, inst), ctxt') = import_inst is_open (map Thm.full_prop_of ths) ctxt; |
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
404 |
val instT' = map (fn (v, T) => (certT (TVar v), certT T)) instT; |
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
405 |
val inst' = map (fn (v, t) => (cert (Var v), cert t)) inst; |
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
406 |
val ths' = map (Thm.instantiate (instT', inst')) ths; |
20220 | 407 |
in (((map #2 instT', map #2 inst'), ths'), ctxt') end; |
19911
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
408 |
|
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
409 |
|
19926 | 410 |
(* import/export *) |
411 |
||
21287 | 412 |
fun gen_trade imp exp f ctxt ths = |
20220 | 413 |
let val ((_, ths'), ctxt') = imp ths ctxt |
21287 | 414 |
in exp ctxt' ctxt (f ctxt' ths') end; |
19926 | 415 |
|
22601 | 416 |
val tradeT = gen_trade importT_thms exportT; |
22568
ed7aa5a350ef
renamed Variable.import to import_thms (avoid clash with Alice keywords);
wenzelm
parents:
21799
diff
changeset
|
417 |
val trade = gen_trade (import_thms true) export; |
19926 | 418 |
|
419 |
||
20162 | 420 |
(* focus on outermost parameters *) |
20149 | 421 |
|
422 |
fun forall_elim_prop t prop = |
|
20579 | 423 |
Thm.beta_conversion false (Thm.capply (Thm.dest_arg prop) t) |
424 |
|> Thm.cprop_of |> Thm.dest_arg; |
|
20149 | 425 |
|
426 |
fun focus goal ctxt = |
|
427 |
let |
|
428 |
val cert = Thm.cterm_of (Thm.theory_of_cterm goal); |
|
429 |
val t = Thm.term_of goal; |
|
20162 | 430 |
val ps = Term.variant_frees t (Term.strip_all_vars t); (*as they are printed :-*) |
20149 | 431 |
val (xs, Ts) = split_list ps; |
20797
c1f0bc7e7d80
renamed Variable.invent_fixes to Variable.variant_fixes;
wenzelm
parents:
20579
diff
changeset
|
432 |
val (xs', ctxt') = variant_fixes xs ctxt; |
20220 | 433 |
val ps' = ListPair.map (cert o Free) (xs', Ts); |
434 |
val goal' = fold forall_elim_prop ps' goal; |
|
20149 | 435 |
in ((ps', goal'), ctxt') end; |
436 |
||
20303 | 437 |
fun focus_subgoal i st = |
438 |
let |
|
22691 | 439 |
val all_vars = Thm.fold_terms Term.add_vars st []; |
20303 | 440 |
val no_binds = map (fn (xi, _) => (xi, NONE)) all_vars; |
441 |
in |
|
442 |
add_binds no_binds #> |
|
443 |
fold (declare_constraints o Var) all_vars #> |
|
444 |
focus (Thm.cprem_of st i) |
|
445 |
end; |
|
446 |
||
447 |
||
19911
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
448 |
|
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
449 |
(** implicit polymorphism **) |
19899
b7385ca02d79
Fixed type/term variables and polymorphic term abbreviations.
wenzelm
parents:
diff
changeset
|
450 |
|
b7385ca02d79
Fixed type/term variables and polymorphic term abbreviations.
wenzelm
parents:
diff
changeset
|
451 |
(* warn_extra_tfrees *) |
b7385ca02d79
Fixed type/term variables and polymorphic term abbreviations.
wenzelm
parents:
diff
changeset
|
452 |
|
b7385ca02d79
Fixed type/term variables and polymorphic term abbreviations.
wenzelm
parents:
diff
changeset
|
453 |
fun warn_extra_tfrees ctxt1 ctxt2 = |
b7385ca02d79
Fixed type/term variables and polymorphic term abbreviations.
wenzelm
parents:
diff
changeset
|
454 |
let |
19911
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
455 |
fun occs_typ a = Term.exists_subtype (fn TFree (b, _) => a = b | _ => false); |
20162 | 456 |
fun occs_free a x = |
457 |
(case def_type ctxt1 false (x, ~1) of |
|
458 |
SOME T => if occs_typ a T then I else cons (a, x) |
|
459 |
| NONE => cons (a, x)); |
|
19899
b7385ca02d79
Fixed type/term variables and polymorphic term abbreviations.
wenzelm
parents:
diff
changeset
|
460 |
|
20162 | 461 |
val occs1 = type_occs_of ctxt1; |
462 |
val occs2 = type_occs_of ctxt2; |
|
19911
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
463 |
val extras = Symtab.fold (fn (a, xs) => |
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
464 |
if Symtab.defined occs1 a then I else fold (occs_free a) xs) occs2 []; |
19899
b7385ca02d79
Fixed type/term variables and polymorphic term abbreviations.
wenzelm
parents:
diff
changeset
|
465 |
val tfrees = map #1 extras |> sort_distinct string_ord; |
b7385ca02d79
Fixed type/term variables and polymorphic term abbreviations.
wenzelm
parents:
diff
changeset
|
466 |
val frees = map #2 extras |> sort_distinct string_ord; |
b7385ca02d79
Fixed type/term variables and polymorphic term abbreviations.
wenzelm
parents:
diff
changeset
|
467 |
in |
b7385ca02d79
Fixed type/term variables and polymorphic term abbreviations.
wenzelm
parents:
diff
changeset
|
468 |
if null extras then () |
b7385ca02d79
Fixed type/term variables and polymorphic term abbreviations.
wenzelm
parents:
diff
changeset
|
469 |
else warning ("Introduced fixed type variable(s): " ^ commas tfrees ^ " in " ^ |
b7385ca02d79
Fixed type/term variables and polymorphic term abbreviations.
wenzelm
parents:
diff
changeset
|
470 |
space_implode " or " (map quote frees)) |
b7385ca02d79
Fixed type/term variables and polymorphic term abbreviations.
wenzelm
parents:
diff
changeset
|
471 |
end; |
b7385ca02d79
Fixed type/term variables and polymorphic term abbreviations.
wenzelm
parents:
diff
changeset
|
472 |
|
b7385ca02d79
Fixed type/term variables and polymorphic term abbreviations.
wenzelm
parents:
diff
changeset
|
473 |
|
20149 | 474 |
(* polymorphic terms *) |
19899
b7385ca02d79
Fixed type/term variables and polymorphic term abbreviations.
wenzelm
parents:
diff
changeset
|
475 |
|
24694 | 476 |
fun polymorphic_types ctxt ts = |
20003 | 477 |
let |
478 |
val ctxt' = fold declare_term ts ctxt; |
|
20162 | 479 |
val occs = type_occs_of ctxt; |
480 |
val occs' = type_occs_of ctxt'; |
|
481 |
val types = Symtab.fold (fn (a, _) => if Symtab.defined occs a then I else cons a) occs' []; |
|
20003 | 482 |
val idx = fold (Term.fold_types Term.maxidx_typ) ts ~1 + 1; |
24694 | 483 |
val Ts' = (fold o fold_types o fold_atyps) |
484 |
(fn T as TFree _ => |
|
485 |
(case TermSubst.generalizeT types idx T of TVar v => insert (op =) v | _ => I) |
|
486 |
| _ => I) ts []; |
|
487 |
val ts' = map (TermSubst.generalize (types, []) idx) ts; |
|
488 |
in (rev Ts', ts') end; |
|
489 |
||
490 |
fun polymorphic ctxt ts = snd (polymorphic_types ctxt ts); |
|
20003 | 491 |
|
19899
b7385ca02d79
Fixed type/term variables and polymorphic term abbreviations.
wenzelm
parents:
diff
changeset
|
492 |
end; |