lean4-htt/src/Lean/Compiler/ClosedTermCache.lean
2020-10-17 06:55:28 -07:00

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#lang lean4
/-
Copyright (c) 2019 Microsoft Corporation. All rights reserved.
Released under Apache 2.0 license as described in the file LICENSE.
Authors: Leonardo de Moura
-/
import Lean.Environment
namespace Lean
abbrev ClosedTermCache := SMap Expr Name
initialize closedTermCacheExt : SimplePersistentEnvExtension (Expr × Name) ClosedTermCache ←
registerSimplePersistentEnvExtension {
name := `closedTermCache,
addImportedFn := fun as =>
let cache : ClosedTermCache := mkStateFromImportedEntries (fun s (p : Expr × Name) => s.insert p.1 p.2) {} as;
cache.switch,
addEntryFn := fun s ⟨e, n⟩ => s.insert e n
}
@[export lean_cache_closed_term_name]
def cacheClosedTermName (env : Environment) (e : Expr) (n : Name) : Environment :=
closedTermCacheExt.addEntry env (e, n)
@[export lean_get_closed_term_name]
def getClosedTermName? (env : Environment) (e : Expr) : Option Name :=
(closedTermCacheExt.getState env).find? e
end Lean