-- Ancestor of all Movement strategy classes.
-- Follows the strategy pattern from GOF book.

deferred class
	STRATEGY

inherit
  PUZZLE_COMPONENT

feature

  mobile : AUTO_MOBILE
  -- the piece who's movement I govern.

  try_move is
  -- Based on my brains, try to move `mobile'.
  deferred
  end

feature{NONE}

  make( m : AUTO_MOBILE ) is
  -- Default creation routine, just sets my `mobile'.
  do
    mobile := m
  ensure
    mobile = m
  end

end