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structure Context_Facts: sig
val Known: Proof.context -> thm Item_Net.T
val known: Proof.context -> thm list
val known_of: Proof.context -> term -> thm list
val register_known: thm -> Context.generic -> Context.generic
val register_knowns: thm list -> Context.generic -> Context.generic
val Cond: Proof.context -> thm Item_Net.T
val cond: Proof.context -> thm list
val cond_of: Proof.context -> term -> thm list
val register_cond: thm -> Context.generic -> Context.generic
val register_conds: thm list -> Context.generic -> Context.generic
val Eq: Proof.context -> thm Item_Net.T
val eq: Proof.context -> thm list
val eq_of: Proof.context -> term -> thm list
val register_eq: thm -> Context.generic -> Context.generic
val register_eqs: thm list -> Context.generic -> Context.generic
val register_facts: thm list -> Proof.context -> Proof.context
end = struct
(* Known types *)
structure Known = Generic_Data (
type T = thm Item_Net.T
val empty = Item_Net.init Thm.eq_thm
(single o Lib.term_of_typing o Thm.prop_of)
val extend = I
val merge = Item_Net.merge
)
val Known = Known.get o Context.Proof
val known = Item_Net.content o Known
fun known_of ctxt tm = Item_Net.retrieve (Known ctxt) tm
fun register_known typing =
if Lib.is_typing (Thm.prop_of typing) then Known.map (Item_Net.update typing)
else error "Not a type judgment"
fun register_knowns typings = foldr1 (op o) (map register_known typings)
(* Conditional type rules *)
(*Two important cases: 1. general type inference rules and 2. type family
judgments*)
structure Cond = Generic_Data (
type T = thm Item_Net.T
val empty = Item_Net.init Thm.eq_thm
(single o Lib.term_of_typing o Thm.concl_of)
val extend = I
val merge = Item_Net.merge
)
val Cond = Cond.get o Context.Proof
val cond = Item_Net.content o Cond
fun cond_of ctxt tm = Item_Net.retrieve (Cond ctxt) tm
fun register_cond rule =
if Lib.is_typing (Thm.concl_of rule) then Cond.map (Item_Net.update rule)
else error "Not a conditional type judgment"
fun register_conds rules = foldr1 (op o) (map register_cond rules)
(* Equality statements *)
structure Eq = Generic_Data (
type T = thm Item_Net.T
val empty = Item_Net.init Thm.eq_thm
(single o (#1 o Lib.dest_eq) o Thm.concl_of)
val extend = I
val merge = Item_Net.merge
)
val Eq = Eq.get o Context.Proof
val eq = Item_Net.content o Eq
fun eq_of ctxt tm = Item_Net.retrieve (Eq ctxt) tm
fun register_eq rule =
if Lib.is_eq (Thm.concl_of rule) then Eq.map (Item_Net.update rule)
else error "Not a definitional equality judgment"
fun register_eqs rules = foldr1 (op o) (map register_eq rules)
(* Context assumptions *)
fun register_facts ths =
let
val (facts, conds, eqs) = Lib.partition_judgments ths
val f = register_knowns facts handle Empty => I
val c = register_conds conds handle Empty => I
val e = register_eqs eqs handle Empty => I
in Context.proof_map (e o c o f) end
end
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