class Opal::Rewriters::LogicalOperatorAssignment::ConditionalSendHandler

def self.call(lhs, rhs, root_type)
  root_type = :"#{root_type}_asgn"
  recvr, meth, *args = *lhs
  recvr_tmp = new_temp
  cache_recvr = s(:lvasgn, recvr_tmp, recvr) # $tmp = recvr
  recvr = s(:js_tmp, recvr_tmp)
  recvr_is_nil = s(:send, recvr, :nil?)                 # recvr.nil?
  plain_send = lhs.updated(:send, [recvr, meth, *args]) # recvr.meth
  plain_or_asgn = s(root_type, plain_send, rhs)         # recvr.meth ||= rhs
  s(:begin,
    cache_recvr,
    s(:if, recvr_is_nil,                          # if recvr.nil?
      s(:nil),                                    #   nil
                                                  # else
      plain_or_asgn                               #   recvr.meth ||= rhs
    ),
  )                                               # end
end