lisp lexical-let related

[poppyer]

Hi, all,

I try to re-bind TAB key to call (tab) or (m-tab), according to weather
it stops at the end of a word. But the following lisp code not working
as expected. Any idea?

==========
  (lexical-let ((tab (key-binding (kbd "TAB")))
                (mtab (key-binding (kbd "M-TAB"))))
    (local-set-key (kbd "TAB") (lambda()
                                 (interactive)
                                 (if (looking-at "\\>")
                                     mtab
                                   tab
                                   )
                                 )
                   )
    )
==========

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