Re: run-with-timer does not display message

[Stefan Monnier]

> Because they can be encoded different things it makes sense calling
> this lexical (because the value is simply read, not looked up) and not
> "static".

It's also called "static scoping".  And the name doesn't have much to do
with the implementation technique used.  It's called "lexical" because
the way a particular identifier use is matched to a particular variable
only depends on the shape of the program text rather than depending on
its run-time behavior.

> This corresponds to an extent to
> call-by-value/call-by-reference,

No.  CBV/CBR/CBN are orthogonal concepts to static/dynamic scoping.

> 1. How do I put Emacs in lexical mode? Do I do that

Put -*- lexical-binding:t -*- somewhere on the first line of your Elisp file.


        Stefan