more explicit error on malformed abstract equation; dropped dead code; tuned signature
(* Title: Pure/Isar/local_theory.ML
Author: Makarius
Local theory operations, with abstract target context.
*)
type local_theory = Proof.context;
type generic_theory = Context.generic;
signature LOCAL_THEORY =
sig
type operations
val affirm: local_theory -> local_theory
val naming_of: local_theory -> Name_Space.naming
val full_name: local_theory -> binding -> string
val map_naming: (Name_Space.naming -> Name_Space.naming) -> local_theory -> local_theory
val conceal: local_theory -> local_theory
val new_group: local_theory -> local_theory
val reset_group: local_theory -> local_theory
val restore_naming: local_theory -> local_theory -> local_theory
val target_of: local_theory -> Proof.context
val raw_theory_result: (theory -> 'a * theory) -> local_theory -> 'a * local_theory
val raw_theory: (theory -> theory) -> local_theory -> local_theory
val background_theory_result: (theory -> 'a * theory) -> local_theory -> 'a * local_theory
val background_theory: (theory -> theory) -> local_theory -> local_theory
val target_result: (Proof.context -> 'a * Proof.context) -> local_theory -> 'a * local_theory
val target: (Proof.context -> Proof.context) -> local_theory -> local_theory
val map_contexts: (Context.generic -> Context.generic) -> local_theory -> local_theory
val propagate_ml_env: generic_theory -> generic_theory
val standard_morphism: local_theory -> Proof.context -> morphism
val target_morphism: local_theory -> morphism
val global_morphism: local_theory -> morphism
val define: (binding * mixfix) * (Attrib.binding * term) -> local_theory ->
(term * (string * thm)) * local_theory
val note: Attrib.binding * thm list -> local_theory -> (string * thm list) * local_theory
val notes: (Attrib.binding * (thm list * Attrib.src list) list) list ->
local_theory -> (string * thm list) list * local_theory
val notes_kind: string -> (Attrib.binding * (thm list * Attrib.src list) list) list ->
local_theory -> (string * thm list) list * local_theory
val abbrev: Syntax.mode -> (binding * mixfix) * term -> local_theory ->
(term * term) * local_theory
val declaration: {syntax: bool, pervasive: bool} -> declaration -> local_theory -> local_theory
val pretty: local_theory -> Pretty.T list
val set_defsort: sort -> local_theory -> local_theory
val type_notation: bool -> Syntax.mode -> (typ * mixfix) list -> local_theory -> local_theory
val notation: bool -> Syntax.mode -> (term * mixfix) list -> local_theory -> local_theory
val class_alias: binding -> class -> local_theory -> local_theory
val type_alias: binding -> string -> local_theory -> local_theory
val const_alias: binding -> string -> local_theory -> local_theory
val init: serial option -> string -> operations -> Proof.context -> local_theory
val restore: local_theory -> local_theory
val exit: local_theory -> Proof.context
val exit_global: local_theory -> theory
val exit_result: (morphism -> 'a -> 'b) -> 'a * local_theory -> 'b * Proof.context
val exit_result_global: (morphism -> 'a -> 'b) -> 'a * local_theory -> 'b * theory
end;
structure Local_Theory: LOCAL_THEORY =
struct
(** local theory data **)
(* type lthy *)
type operations =
{define: (binding * mixfix) * (Attrib.binding * term) -> local_theory ->
(term * (string * thm)) * local_theory,
notes: string ->
(Attrib.binding * (thm list * Attrib.src list) list) list ->
local_theory -> (string * thm list) list * local_theory,
abbrev: Syntax.mode -> (binding * mixfix) * term -> local_theory ->
(term * term) * local_theory,
declaration: {syntax: bool, pervasive: bool} -> declaration -> local_theory -> local_theory,
pretty: local_theory -> Pretty.T list,
exit: local_theory -> Proof.context};
datatype lthy = LThy of
{naming: Name_Space.naming,
theory_prefix: string,
operations: operations,
target: Proof.context};
fun make_lthy (naming, theory_prefix, operations, target) =
LThy {naming = naming, theory_prefix = theory_prefix,
operations = operations, target = target};
(* context data *)
structure Data = Proof_Data
(
type T = lthy option;
fun init _ = NONE;
);
fun get_lthy lthy =
(case Data.get lthy of
NONE => error "No local theory context"
| SOME (LThy data) => data);
fun map_lthy f lthy =
let val {naming, theory_prefix, operations, target} = get_lthy lthy
in Data.put (SOME (make_lthy (f (naming, theory_prefix, operations, target)))) lthy end;
val affirm = tap get_lthy;
(* naming *)
val naming_of = #naming o get_lthy;
val full_name = Name_Space.full_name o naming_of;
fun map_naming f = map_lthy (fn (naming, theory_prefix, operations, target) =>
(f naming, theory_prefix, operations, target));
val conceal = map_naming Name_Space.conceal;
val new_group = map_naming Name_Space.new_group;
val reset_group = map_naming Name_Space.reset_group;
val restore_naming = map_naming o K o naming_of;
(* target *)
val target_of = #target o get_lthy;
fun map_target f = map_lthy (fn (naming, theory_prefix, operations, target) =>
(naming, theory_prefix, operations, f target));
(* substructure mappings *)
fun raw_theory_result f lthy =
let
val (res, thy') = f (Proof_Context.theory_of lthy);
val lthy' = lthy
|> map_target (Proof_Context.transfer thy')
|> Proof_Context.transfer thy';
in (res, lthy') end;
fun raw_theory f = #2 o raw_theory_result (f #> pair ());
val checkpoint = raw_theory Theory.checkpoint;
fun background_theory_result f lthy =
lthy |> raw_theory_result (fn thy =>
thy
|> Sign.map_naming (K (naming_of lthy))
|> f
||> Sign.restore_naming thy
||> Theory.checkpoint);
fun background_theory f = #2 o background_theory_result (f #> pair ());
fun target_result f lthy =
let
val (res, ctxt') = target_of lthy
|> Context_Position.set_visible false
|> f
||> Context_Position.restore_visible lthy;
val thy' = Proof_Context.theory_of ctxt';
val lthy' = lthy
|> map_target (K ctxt')
|> Proof_Context.transfer thy';
in (res, lthy') end;
fun target f = #2 o target_result (f #> pair ());
fun map_contexts f =
background_theory (Context.theory_map f) #>
target (Context.proof_map f) #>
Context.proof_map f;
fun propagate_ml_env (context as Context.Proof lthy) =
Context.Proof (map_contexts (ML_Env.inherit context) lthy)
| propagate_ml_env context = context;
(* morphisms *)
fun standard_morphism lthy ctxt =
Proof_Context.norm_export_morphism lthy ctxt $>
Morphism.binding_morphism (Name_Space.transform_binding (naming_of lthy));
fun target_morphism lthy = standard_morphism lthy (target_of lthy);
fun global_morphism lthy =
standard_morphism lthy (Proof_Context.init_global (Proof_Context.theory_of lthy));
(* primitive operations *)
fun operation f lthy = f (#operations (get_lthy lthy)) lthy;
fun operation1 f x = operation (fn ops => f ops x);
fun operation2 f x y lthy = operation (fn ops => f ops x y) lthy;
val pretty = operation #pretty;
val abbrev = apsnd checkpoint ooo operation2 #abbrev;
val define = apsnd checkpoint oo operation1 #define;
val notes_kind = apsnd checkpoint ooo operation2 #notes;
val declaration = checkpoint ooo operation2 #declaration;
(** basic derived operations **)
val notes = notes_kind "";
fun note (a, ths) = notes [(a, [(ths, [])])] #>> the_single;
fun set_defsort S =
declaration {syntax = true, pervasive = false}
(K (Context.mapping (Sign.set_defsort S) (Proof_Context.set_defsort S)));
(* notation *)
fun type_notation add mode raw_args lthy =
let val args = map (apfst (Morphism.typ (target_morphism lthy))) raw_args in
declaration {syntax = true, pervasive = false}
(Proof_Context.target_type_notation add mode args) lthy
end;
fun notation add mode raw_args lthy =
let val args = map (apfst (Morphism.term (target_morphism lthy))) raw_args in
declaration {syntax = true, pervasive = false}
(Proof_Context.target_notation add mode args) lthy
end;
(* name space aliases *)
fun alias global_alias local_alias b name =
declaration {syntax = true, pervasive = false} (fn phi =>
let val b' = Morphism.binding phi b
in Context.mapping (global_alias b' name) (local_alias b' name) end);
val class_alias = alias Sign.class_alias Proof_Context.class_alias;
val type_alias = alias Sign.type_alias Proof_Context.type_alias;
val const_alias = alias Sign.const_alias Proof_Context.const_alias;
(** init and exit **)
(* init *)
fun init group theory_prefix operations target =
let val naming =
Sign.naming_of (Proof_Context.theory_of target)
|> Name_Space.set_group group
|> Name_Space.mandatory_path theory_prefix;
in
target |> Data.map
(fn NONE => SOME (make_lthy (naming, theory_prefix, operations, target))
| SOME _ => error "Local theory already initialized")
|> checkpoint
end;
fun restore lthy =
let val {naming, theory_prefix, operations, target} = get_lthy lthy
in init (Name_Space.get_group naming) theory_prefix operations target end;
(* exit *)
val exit = Proof_Context.background_theory Theory.checkpoint o operation #exit;
val exit_global = Proof_Context.theory_of o exit;
fun exit_result f (x, lthy) =
let
val ctxt = exit lthy;
val phi = standard_morphism lthy ctxt;
in (f phi x, ctxt) end;
fun exit_result_global f (x, lthy) =
let
val thy = exit_global lthy;
val thy_ctxt = Proof_Context.init_global thy;
val phi = standard_morphism lthy thy_ctxt;
in (f phi x, thy) end;
end;