author | ballarin |
Wed, 19 Jul 2006 19:25:58 +0200 | |
changeset 20168 | ed7bced29e1b |
parent 20162 | d4bcb27686f9 |
child 20198 | 7b385487f22f |
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: Context.proof -> bool |
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val set_body: bool -> Context.proof -> Context.proof |
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val restore_body: Context.proof -> Context.proof -> Context.proof |
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val names_of: Context.proof -> Name.context |
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val fixes_of: Context.proof -> (string * string) list |
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val binds_of: Context.proof -> (typ * term) Vartab.table |
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val constraints_of: Context.proof -> typ Vartab.table * sort Vartab.table |
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val is_declared: Context.proof -> string -> bool |
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val is_fixed: Context.proof -> string -> bool |
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val newly_fixed: Context.proof -> Context.proof -> string -> bool |
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val default_type: Context.proof -> string -> typ option |
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val def_type: Context.proof -> bool -> indexname -> typ option |
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val def_sort: Context.proof -> indexname -> sort option |
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val declare_constraints: term -> Context.proof -> Context.proof |
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val declare_internal: term -> Context.proof -> Context.proof |
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val declare_term: term -> Context.proof -> Context.proof |
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val declare_thm: thm -> Context.proof -> Context.proof |
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val thm_context: thm -> Context.proof |
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val variant_frees: Context.proof -> term list -> (string * 'a) list -> (string * 'a) list |
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val add_fixes: string list -> Context.proof -> string list * Context.proof |
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val invent_fixes: string list -> Context.proof -> string list * Context.proof |
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val invent_types: sort list -> Context.proof -> (string * sort) list * Context.proof |
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val export_inst: Context.proof -> Context.proof -> string list * string list |
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val exportT_inst: Context.proof -> Context.proof -> string list |
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val export_terms: Context.proof -> Context.proof -> term list -> term list |
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val exportT_terms: Context.proof -> Context.proof -> term list -> term list |
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val exportT: Context.proof -> Context.proof -> thm list -> thm list |
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val export: Context.proof -> Context.proof -> thm list -> thm list |
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val importT_inst: term list -> Context.proof -> ((indexname * sort) * typ) list * Context.proof |
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val import_inst: bool -> term list -> Context.proof -> |
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(((indexname * sort) * typ) list * ((indexname * typ) * term) list) * Context.proof |
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val importT_terms: term list -> Context.proof -> term list * Context.proof |
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val import_terms: bool -> term list -> Context.proof -> term list * Context.proof |
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val importT: thm list -> Context.proof -> thm list * Context.proof |
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val import: bool -> thm list -> Context.proof -> thm list * Context.proof |
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val tradeT: Context.proof -> (thm list -> thm list) -> thm list -> thm list |
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val trade: Context.proof -> (thm list -> thm list) -> thm list -> thm list |
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val focus: cterm -> Context.proof -> ((string * typ) list * cterm) * Context.proof |
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val warn_extra_tfrees: Context.proof -> Context.proof -> unit |
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val polymorphic: Context.proof -> term list -> term list |
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val hidden_polymorphism: term -> typ -> (indexname * sort) list |
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val add_binds: (indexname * term option) list -> Context.proof -> Context.proof |
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val expand_binds: Context.proof -> term -> term |
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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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val name = "Pure/variable"; |
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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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fun print _ _ = (); |
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); |
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val _ = Context.add_setup Data.init; |
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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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(** 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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val declare_type_occs = map_type_occs o 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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| _ => fold_atyps (fn TFree (a, _) => Symtab.default (a, []) | _ => I)); |
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(* constraints *) |
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fun redeclare_skolems ctxt = ctxt |> map_constraints (apfst (fn types => |
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let |
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fun decl (x, x') = |
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(case default_type ctxt x' of |
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SOME T => Vartab.update ((x, ~1), T) |
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| NONE => I); |
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in fold_rev decl (fixes_of ctxt) types end)); |
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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) => Vartab.update ((x, ~1), S) |
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| TVar v => Vartab.update v |
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| _ => I)) t sorts; |
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in (types', sorts') end) |
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#> declare_type_names t |
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#> redeclare_skolems; |
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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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fun declare_thm th = fold declare_internal (Thm.full_prop_of th :: Thm.hyps_of th); |
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fun thm_context th = declare_thm th (Context.init_proof (Thm.theory_of_thm th)); |
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Fixed type/term variables and polymorphic term abbreviations.
wenzelm
parents:
diff
changeset
|
197 |
(* renaming term/type frees *) |
b7385ca02d79
Fixed type/term variables and polymorphic term abbreviations.
wenzelm
parents:
diff
changeset
|
198 |
|
20162 | 199 |
fun variant_frees ctxt ts frees = |
19899
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parents:
diff
changeset
|
200 |
let |
20162 | 201 |
val names = names_of (fold declare_names ts ctxt); |
20084 | 202 |
val xs = fst (Name.variants (map #1 frees) names); |
203 |
in xs ~~ map snd frees end; |
|
19899
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Fixed type/term variables and polymorphic term abbreviations.
wenzelm
parents:
diff
changeset
|
204 |
|
b7385ca02d79
Fixed type/term variables and polymorphic term abbreviations.
wenzelm
parents:
diff
changeset
|
205 |
|
b7385ca02d79
Fixed type/term variables and polymorphic term abbreviations.
wenzelm
parents:
diff
changeset
|
206 |
|
19911
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changeset
|
207 |
(** fixes **) |
300bc6ce970d
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parents:
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changeset
|
208 |
|
20084 | 209 |
local |
210 |
||
19911
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parents:
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diff
changeset
|
211 |
fun no_dups [] = () |
300bc6ce970d
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changeset
|
212 |
| no_dups dups = error ("Duplicate fixed variable(s): " ^ commas_quote dups); |
300bc6ce970d
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parents:
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diff
changeset
|
213 |
|
20102 | 214 |
fun new_fixes names' xs xs' = |
215 |
map_names (K names') #> |
|
216 |
map_fixes (fn fixes => (rev (xs ~~ xs') @ fixes)) #> |
|
20162 | 217 |
fold (declare_constraints o Syntax.free) xs' #> |
20084 | 218 |
pair xs'; |
219 |
||
220 |
in |
|
221 |
||
19911
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diff
changeset
|
222 |
fun add_fixes xs ctxt = |
300bc6ce970d
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diff
changeset
|
223 |
let |
300bc6ce970d
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changeset
|
224 |
val _ = |
20084 | 225 |
(case filter (can Name.dest_skolem) xs of [] => () |
19911
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diff
changeset
|
226 |
| bads => error ("Illegal internal Skolem constant(s): " ^ commas_quote bads)); |
20084 | 227 |
val _ = no_dups (duplicates (op =) xs); |
228 |
val (ys, zs) = split_list (fixes_of ctxt); |
|
20102 | 229 |
val names = names_of ctxt; |
20084 | 230 |
val (xs', names') = |
20149 | 231 |
if is_body ctxt then Name.variants xs names |>> map Name.skolem |
20084 | 232 |
else (no_dups (xs inter_string ys); no_dups (xs inter_string zs); |
233 |
(xs, fold Name.declare xs names)); |
|
20102 | 234 |
in ctxt |> new_fixes names' xs xs' end; |
19911
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wenzelm
parents:
19899
diff
changeset
|
235 |
|
20084 | 236 |
fun invent_fixes raw_xs ctxt = |
237 |
let |
|
20102 | 238 |
val names = names_of ctxt; |
20149 | 239 |
val xs = map Name.clean raw_xs; |
240 |
val (xs', names') = Name.variants xs names |>> map Name.skolem; |
|
20102 | 241 |
in ctxt |> new_fixes names' xs xs' end; |
20084 | 242 |
|
243 |
end; |
|
19911
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parents:
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diff
changeset
|
244 |
|
300bc6ce970d
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parents:
19899
diff
changeset
|
245 |
fun invent_types Ss ctxt = |
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
246 |
let |
20102 | 247 |
val tfrees = Name.invents (names_of ctxt) "'a" (length Ss) ~~ Ss; |
20162 | 248 |
val ctxt' = fold (declare_constraints o Logic.mk_type o TFree) tfrees ctxt; |
19911
300bc6ce970d
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wenzelm
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diff
changeset
|
249 |
in (tfrees, ctxt') end; |
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
250 |
|
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
251 |
|
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
252 |
|
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
253 |
(** export -- generalize type/term variables **) |
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
254 |
|
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
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parents:
19899
diff
changeset
|
255 |
fun export_inst inner outer = |
300bc6ce970d
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wenzelm
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diff
changeset
|
256 |
let |
20162 | 257 |
val declared_outer = is_declared outer; |
19911
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wenzelm
parents:
19899
diff
changeset
|
258 |
val fixes_inner = fixes_of inner; |
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
259 |
val fixes_outer = fixes_of outer; |
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
260 |
|
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
261 |
val gen_fixes = map #2 (Library.take (length fixes_inner - length fixes_outer, fixes_inner)); |
20162 | 262 |
val still_fixed = not o member (op =) gen_fixes; |
19911
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
263 |
val gen_fixesT = |
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
264 |
Symtab.fold (fn (a, xs) => |
20162 | 265 |
if declared_outer a orelse exists still_fixed xs |
19911
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
266 |
then I else cons a) (type_occs_of inner) []; |
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
267 |
in (gen_fixesT, gen_fixes) end; |
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
268 |
|
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
269 |
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
|
270 |
|
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
271 |
fun exportT_terms inner outer ts = |
20162 | 272 |
map (Term.generalize (exportT_inst (fold declare_type_occs ts inner) outer, []) |
19911
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
273 |
(fold (Term.fold_types Term.maxidx_typ) ts ~1 + 1)) ts; |
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
274 |
|
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
275 |
fun export_terms inner outer ts = |
20162 | 276 |
map (Term.generalize (export_inst (fold declare_type_occs ts inner) outer) |
19911
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
277 |
(fold Term.maxidx_term ts ~1 + 1)) ts; |
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
278 |
|
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
279 |
fun gen_export inst inner outer ths = |
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
280 |
let |
19926 | 281 |
val ths' = map Thm.adjust_maxidx_thm ths; |
20162 | 282 |
val inner' = fold (declare_type_occs o Thm.full_prop_of) ths' inner; |
20003 | 283 |
in map (Thm.generalize (inst inner' outer) (fold Thm.maxidx_thm ths' ~1 + 1)) ths' end; |
19911
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
284 |
|
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
285 |
val exportT = gen_export (rpair [] oo exportT_inst); |
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
286 |
val export = gen_export export_inst; |
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
287 |
|
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
288 |
|
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
289 |
|
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
290 |
(** import -- fix schematic type/term variables **) |
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
291 |
|
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
292 |
fun importT_inst ts ctxt = |
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
293 |
let |
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
294 |
val tvars = rev (fold Term.add_tvars ts []); |
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
295 |
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
|
296 |
in (tvars ~~ map TFree tfrees, ctxt') end; |
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
297 |
|
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
298 |
fun import_inst is_open ts ctxt = |
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
299 |
let |
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
300 |
val (instT, ctxt') = importT_inst ts ctxt; |
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
301 |
val vars = map (apsnd (Term.instantiateT instT)) (rev (fold Term.add_vars ts [])); |
20084 | 302 |
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
|
303 |
val (xs, ctxt'') = invent_fixes (map (ren o #1 o #1) vars) ctxt'; |
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
304 |
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
|
305 |
in ((instT, inst), ctxt'') end; |
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
306 |
|
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
307 |
fun importT_terms ts ctxt = |
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
308 |
let val (instT, ctxt') = importT_inst ts ctxt |
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
309 |
in (map (Term.instantiate (instT, [])) ts, ctxt') end; |
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
310 |
|
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
311 |
fun import_terms is_open ts ctxt = |
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
312 |
let val (inst, ctxt') = import_inst is_open ts ctxt |
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
313 |
in (map (Term.instantiate inst) ts, ctxt') 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 importT ths ctxt = |
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
316 |
let |
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
317 |
val thy = Context.theory_of_proof ctxt; |
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
318 |
val certT = Thm.ctyp_of thy; |
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
319 |
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
|
320 |
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
|
321 |
val ths' = map (Thm.instantiate (instT', [])) ths; |
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
322 |
in (ths', ctxt') end; |
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
323 |
|
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
324 |
fun import is_open ths ctxt = |
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
325 |
let |
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
326 |
val thy = Context.theory_of_proof ctxt; |
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
327 |
val cert = Thm.cterm_of thy; |
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
328 |
val certT = Thm.ctyp_of thy; |
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
329 |
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
|
330 |
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
|
331 |
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
|
332 |
val ths' = map (Thm.instantiate (instT', inst')) ths; |
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
333 |
in (ths', ctxt') end; |
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
334 |
|
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
335 |
|
19926 | 336 |
(* import/export *) |
337 |
||
338 |
fun gen_trade imp exp ctxt f ths = |
|
339 |
let val (ths', ctxt') = imp ths ctxt |
|
340 |
in exp ctxt' ctxt (f ths') end; |
|
341 |
||
342 |
val tradeT = gen_trade importT exportT; |
|
343 |
val trade = gen_trade (import true) export; |
|
344 |
||
345 |
||
20162 | 346 |
(* focus on outermost parameters *) |
20149 | 347 |
|
348 |
fun forall_elim_prop t prop = |
|
349 |
Thm.beta_conversion false (Thm.capply (#2 (Thm.dest_comb prop)) t) |
|
350 |
|> Thm.cprop_of |> Thm.dest_comb |> #2; |
|
351 |
||
352 |
fun focus goal ctxt = |
|
353 |
let |
|
354 |
val cert = Thm.cterm_of (Thm.theory_of_cterm goal); |
|
355 |
val t = Thm.term_of goal; |
|
20162 | 356 |
val ps = Term.variant_frees t (Term.strip_all_vars t); (*as they are printed :-*) |
20149 | 357 |
val (xs, Ts) = split_list ps; |
358 |
val (xs', ctxt') = invent_fixes xs ctxt; |
|
359 |
val ps' = xs' ~~ Ts; |
|
360 |
val goal' = fold (forall_elim_prop o cert o Free) ps' goal; |
|
361 |
in ((ps', goal'), ctxt') end; |
|
362 |
||
19911
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
363 |
|
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
364 |
(** implicit polymorphism **) |
19899
b7385ca02d79
Fixed type/term variables and polymorphic term abbreviations.
wenzelm
parents:
diff
changeset
|
365 |
|
b7385ca02d79
Fixed type/term variables and polymorphic term abbreviations.
wenzelm
parents:
diff
changeset
|
366 |
(* warn_extra_tfrees *) |
b7385ca02d79
Fixed type/term variables and polymorphic term abbreviations.
wenzelm
parents:
diff
changeset
|
367 |
|
b7385ca02d79
Fixed type/term variables and polymorphic term abbreviations.
wenzelm
parents:
diff
changeset
|
368 |
fun warn_extra_tfrees ctxt1 ctxt2 = |
b7385ca02d79
Fixed type/term variables and polymorphic term abbreviations.
wenzelm
parents:
diff
changeset
|
369 |
let |
19911
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
370 |
fun occs_typ a = Term.exists_subtype (fn TFree (b, _) => a = b | _ => false); |
20162 | 371 |
fun occs_free a x = |
372 |
(case def_type ctxt1 false (x, ~1) of |
|
373 |
SOME T => if occs_typ a T then I else cons (a, x) |
|
374 |
| NONE => cons (a, x)); |
|
19899
b7385ca02d79
Fixed type/term variables and polymorphic term abbreviations.
wenzelm
parents:
diff
changeset
|
375 |
|
20162 | 376 |
val occs1 = type_occs_of ctxt1; |
377 |
val occs2 = type_occs_of ctxt2; |
|
19911
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
378 |
val extras = Symtab.fold (fn (a, xs) => |
300bc6ce970d
major reworking of export functionality -- based on Term/Thm.generalize;
wenzelm
parents:
19899
diff
changeset
|
379 |
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
|
380 |
val tfrees = map #1 extras |> sort_distinct string_ord; |
b7385ca02d79
Fixed type/term variables and polymorphic term abbreviations.
wenzelm
parents:
diff
changeset
|
381 |
val frees = map #2 extras |> sort_distinct string_ord; |
b7385ca02d79
Fixed type/term variables and polymorphic term abbreviations.
wenzelm
parents:
diff
changeset
|
382 |
in |
b7385ca02d79
Fixed type/term variables and polymorphic term abbreviations.
wenzelm
parents:
diff
changeset
|
383 |
if null extras then () |
b7385ca02d79
Fixed type/term variables and polymorphic term abbreviations.
wenzelm
parents:
diff
changeset
|
384 |
else warning ("Introduced fixed type variable(s): " ^ commas tfrees ^ " in " ^ |
b7385ca02d79
Fixed type/term variables and polymorphic term abbreviations.
wenzelm
parents:
diff
changeset
|
385 |
space_implode " or " (map quote frees)) |
b7385ca02d79
Fixed type/term variables and polymorphic term abbreviations.
wenzelm
parents:
diff
changeset
|
386 |
end; |
b7385ca02d79
Fixed type/term variables and polymorphic term abbreviations.
wenzelm
parents:
diff
changeset
|
387 |
|
b7385ca02d79
Fixed type/term variables and polymorphic term abbreviations.
wenzelm
parents:
diff
changeset
|
388 |
|
20149 | 389 |
(* polymorphic terms *) |
19899
b7385ca02d79
Fixed type/term variables and polymorphic term abbreviations.
wenzelm
parents:
diff
changeset
|
390 |
|
b7385ca02d79
Fixed type/term variables and polymorphic term abbreviations.
wenzelm
parents:
diff
changeset
|
391 |
fun polymorphic ctxt ts = |
20003 | 392 |
let |
393 |
val ctxt' = fold declare_term ts ctxt; |
|
20162 | 394 |
val occs = type_occs_of ctxt; |
395 |
val occs' = type_occs_of ctxt'; |
|
396 |
val types = Symtab.fold (fn (a, _) => if Symtab.defined occs a then I else cons a) occs' []; |
|
20003 | 397 |
val idx = fold (Term.fold_types Term.maxidx_typ) ts ~1 + 1; |
398 |
in map (Term.generalize (types, []) idx) ts end; |
|
399 |
||
19899
b7385ca02d79
Fixed type/term variables and polymorphic term abbreviations.
wenzelm
parents:
diff
changeset
|
400 |
fun hidden_polymorphism t T = |
b7385ca02d79
Fixed type/term variables and polymorphic term abbreviations.
wenzelm
parents:
diff
changeset
|
401 |
let |
b7385ca02d79
Fixed type/term variables and polymorphic term abbreviations.
wenzelm
parents:
diff
changeset
|
402 |
val tvarsT = Term.add_tvarsT T []; |
b7385ca02d79
Fixed type/term variables and polymorphic term abbreviations.
wenzelm
parents:
diff
changeset
|
403 |
val extra_tvars = Term.fold_types (Term.fold_atyps |
b7385ca02d79
Fixed type/term variables and polymorphic term abbreviations.
wenzelm
parents:
diff
changeset
|
404 |
(fn TVar v => if member (op =) tvarsT v then I else insert (op =) v | _ => I)) t []; |
b7385ca02d79
Fixed type/term variables and polymorphic term abbreviations.
wenzelm
parents:
diff
changeset
|
405 |
in extra_tvars end; |
b7385ca02d79
Fixed type/term variables and polymorphic term abbreviations.
wenzelm
parents:
diff
changeset
|
406 |
|
20162 | 407 |
|
408 |
||
409 |
(** term bindings **) |
|
410 |
||
19899
b7385ca02d79
Fixed type/term variables and polymorphic term abbreviations.
wenzelm
parents:
diff
changeset
|
411 |
fun add_bind (xi, NONE) = map_binds (Vartab.delete_safe xi) |
b7385ca02d79
Fixed type/term variables and polymorphic term abbreviations.
wenzelm
parents:
diff
changeset
|
412 |
| add_bind ((x, i), SOME t) = |
b7385ca02d79
Fixed type/term variables and polymorphic term abbreviations.
wenzelm
parents:
diff
changeset
|
413 |
let |
b7385ca02d79
Fixed type/term variables and polymorphic term abbreviations.
wenzelm
parents:
diff
changeset
|
414 |
val T = Term.fastype_of t; |
b7385ca02d79
Fixed type/term variables and polymorphic term abbreviations.
wenzelm
parents:
diff
changeset
|
415 |
val t' = |
b7385ca02d79
Fixed type/term variables and polymorphic term abbreviations.
wenzelm
parents:
diff
changeset
|
416 |
if null (hidden_polymorphism t T) then t |
b7385ca02d79
Fixed type/term variables and polymorphic term abbreviations.
wenzelm
parents:
diff
changeset
|
417 |
else Var ((x ^ "_has_extra_type_vars_on_rhs", i), T); |
b7385ca02d79
Fixed type/term variables and polymorphic term abbreviations.
wenzelm
parents:
diff
changeset
|
418 |
in declare_term t' #> map_binds (Vartab.update ((x, i), (T, t'))) end; |
b7385ca02d79
Fixed type/term variables and polymorphic term abbreviations.
wenzelm
parents:
diff
changeset
|
419 |
|
b7385ca02d79
Fixed type/term variables and polymorphic term abbreviations.
wenzelm
parents:
diff
changeset
|
420 |
val add_binds = fold add_bind; |
b7385ca02d79
Fixed type/term variables and polymorphic term abbreviations.
wenzelm
parents:
diff
changeset
|
421 |
|
b7385ca02d79
Fixed type/term variables and polymorphic term abbreviations.
wenzelm
parents:
diff
changeset
|
422 |
fun expand_binds ctxt = |
b7385ca02d79
Fixed type/term variables and polymorphic term abbreviations.
wenzelm
parents:
diff
changeset
|
423 |
let |
b7385ca02d79
Fixed type/term variables and polymorphic term abbreviations.
wenzelm
parents:
diff
changeset
|
424 |
val binds = binds_of ctxt; |
b7385ca02d79
Fixed type/term variables and polymorphic term abbreviations.
wenzelm
parents:
diff
changeset
|
425 |
fun expand (t as Var (xi, T)) = |
b7385ca02d79
Fixed type/term variables and polymorphic term abbreviations.
wenzelm
parents:
diff
changeset
|
426 |
(case Vartab.lookup binds xi of |
b7385ca02d79
Fixed type/term variables and polymorphic term abbreviations.
wenzelm
parents:
diff
changeset
|
427 |
SOME u => Envir.expand_atom T u |
b7385ca02d79
Fixed type/term variables and polymorphic term abbreviations.
wenzelm
parents:
diff
changeset
|
428 |
| NONE => t) |
b7385ca02d79
Fixed type/term variables and polymorphic term abbreviations.
wenzelm
parents:
diff
changeset
|
429 |
| expand t = t; |
b7385ca02d79
Fixed type/term variables and polymorphic term abbreviations.
wenzelm
parents:
diff
changeset
|
430 |
in Envir.beta_norm o Term.map_aterms expand end; |
b7385ca02d79
Fixed type/term variables and polymorphic term abbreviations.
wenzelm
parents:
diff
changeset
|
431 |
|
b7385ca02d79
Fixed type/term variables and polymorphic term abbreviations.
wenzelm
parents:
diff
changeset
|
432 |
end; |