Re: Trouble with lexical-binding.

[Nicolas Richard]

Stefan Monnier <address@hidden> writes:
> But the fix is easy: declare that `ptr' should be a dynamically scoped
> variable with a simple:
>
>     (defvar ptr)
>
> Of course, doing so is strongly discouraged, since it could break other
> code which uses `ptr' and expects lexical binding for it.

I don't think it can break code defined elsewhere : the (defvar ptr)
form only has effect in its lexical scope, unlike the 2+ arguments
versions where a default value is provided.

(defvar ptr) => ptr
(special-variable-p 'ptr) => nil
(defvar ptr nil) => ptr
(special-variable-p 'ptr) => t

-- 
Nicolas