Re: Passing optional arguments for use with internal functions

[Emanuel Berg]

uzibalqa wrote:

>> ;;; -- lexical-binding: nil --
>> 
>> (defvar arg)
>> (setq arg 2)
>> 
>> (defun echo-arg (&optional arg)
>> (or arg (setq arg 1))
>> (message "%s" arg) )
>> 
>> ;; (echo-arg)
>> 
>> This will still echo 1.
>
> Now that there has been a change from dynamic to lexical
> binding, this becomes a problem. What command should one use
> to set a default value to an optional argument for the
> current lexical binding files ?

The same, since function arguments are always lexical.

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