ruby construct for preserving original value of a variable after block execution

Question

Sometimes I need to preserve the original value of a variable, do stuff and then restore its original value kind of like this:

def method
  original_value = @variable
  @variable = true

  result = # Do stuff

  @variable = original_value
  result
end

Is there some kind of language construct in Ruby which would allow me to do it simpler?

I tried to search for this, but I couldn't really come up with any googleable search terms. I managed to code my own solution for it by passing the current binding and then using eval to preserve the original value in the original context:

def preserve_value(var, bind)
  eval "lksdflkjsdlkfjdslkfjsdlkfj123214343245435324 = #{var}", bind
  result = yield
  eval "#{var} = lksdflkjsdlkfjdslkfjsdlkfj123214343245435324", bind

  result
end

def method
  preserve_value :@variable, binding do
    @variable = 3
    # Do stuff
  end
end

Is there a better alternative for achieving this?