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Re: lexical-binding questions

From: Stefan Monnier
Subject: Re: lexical-binding questions
Date: Sat, 05 May 2012 09:26:32 -0400
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/24.1.50 (gnu/linux)

> it seem C-M-x is not working as expected in a `lexical-binding' enabled
> buffer:

> #+BEGIN_SRC emacs-lisp
> ;; -*- lexical-binding: t -*-

> (defun foo ()
>   (declare (special bar))
>   (let ((bar 2)
>         (baz 3))
>     #'(lambda () (+ bar baz))))

> ;; I expect this:

> ;; (funcall (foo))
> ;;=>Symbol's value as variable is void: bar


> However, (funcall (foo)) return 5 until I byte-compile and load the
> file.

What makes you think this has something to do with C-M-x?  AFAICT it's
just a difference between interpreted and compiled code, because
CL's (declare (special bar)) has not been adapted to lexical-binding.

> So my question is how do you evaluate such code when working in a
> `lexical-binding' enabled buffer?

You don't use (declare (special bar)).


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