brew/Library/Homebrew/extend/cachable.rb

# typed: strict
# frozen_string_literal: true

module Cachable
  sig { returns(T::Hash[T.untyped, T.untyped]) }
  def cache
    @cache ||= T.let({}, T.nilable(T::Hash[T.untyped, T.untyped]))
  end

  # NOTE: We overwrite here instead of using `Hash#clear` to handle frozen hashes.
  sig { void }
  def clear_cache
    overwrite_cache!({})
  end

  private

  sig { params(hash: T::Hash[T.untyped, T.untyped]).void }
  def overwrite_cache!(hash)
    @cache = hash
  end
end