Re: What is the difference between defsubst and defun ?

[Fren Zeee]

On Dec 4, 1:19 pm, "Pascal J. Bourguignon" <p...@informatimago.com>
wrote:
> Fren Zeee <frenz...@gmail.com> writes:
> > This is a newbie question.
>
> > [Q] In emacs, What is the difference between defsubst and defun ?
>
> > I have searched and looked at the documentation but not satisfactory
> > answer.
>
> > defsubst is a Lisp macro in `byte-run'.
> > (defsubst NAME ARGLIST &rest BODY)
> > Define an inline function.  The syntax is just like that of `defun'.
>
> > defun is a special form.
> > (defun NAME ARGLIST [DOCSTRING] BODY...)
>
> > Define NAME as a function.
> > The definition is (lambda ARGLIST [DOCSTRING] BODY...).
> > See also the function `interactive'.
>
> > *** What are the key attributes of the inline function in general in
> > lisp and in particular in CL and elisp ? ***
>
> (set-difference '(Define an inline function) '(Define NAME as a function))
> --> (inline an)
>
> So, I guess the difference is an inline.
>

But what does it mean in operational terms ?

How is it being represented differently at a lower layer ?

How is it acting differently and treated differently by the
interpreter ?

Its obvious that there IS A difference of name and behaviour is
indicated ?

What is that difference semantically and operationally ?

Geez