Re: [External] : M-. vs C-h o

[Emanuel Berg]

Drew Adams wrote:

>> mapc is a built-in function in ‘src/fns.c’.
>
> That tells you that it's a Lisp function that's "built-in",
> meaning that it's implemented in C.

A so-called Lisp primitive ...

"Lisp primitives are Lisp functions implemented in C"

http://www.gnu.org/software/emacs/manual/html_node/elisp/Writing-Emacs-Primitives.html
(info "(elisp)Writing Emacs Primitives")

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