lean4-htt/Lake/Util/StoreInsts.lean
tydeu 7049a8da5f refactor: DynamicType -> FamilyDef
Uses more principled terminology (i.e., its really an open type family)
2022-07-04 17:21:36 -04:00

23 lines
789 B
Text
Raw Blame History

This file contains ambiguous Unicode characters

This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

/-
Copyright (c) 2022 Mac Malone. All rights reserved.
Released under Apache 2.0 license as described in the file LICENSE.
Authors: Mac Malone
-/
import Lake.Util.DRBMap
import Lake.Util.Family
import Lake.Util.Store
open Std
namespace Lake
instance [Monad m] [EqOfCmpWrt κ β cmp] : MonadDStore κ β (StateT (DRBMap κ β cmp) m) where
fetch? k := return (← get).find? k
store k a := modify (·.insert k a)
instance [Monad m] : MonadStore κ α (StateT (RBMap κ α cmp) m) where
fetch? k := return (← get).find? k
store k a := modify (·.insert k a)
@[inline] instance [MonadDStore κ β m] [t : FamilyDef β k α] : MonadStore1 k α m where
fetch? := cast (by rw [t.family_key_eq_type]) <| fetch? (m := m) k
store a := store k <| cast t.family_key_eq_type.symm a