I've been reading through a number of Emacs Lisp packages and have come across the convention of some functions being declared with -- after the library prefix, e.g.:
(defun eproject--combine-regexps (regexp-list)
I'm wondering if this a convention for declaring "private" functions to the library but so far I haven't found anything in the Emacs Coding guidelines.
Emacs doesn't have any support for namespaces, packages, libraries or modules. Emacs sources therefore use foo- as a prefix for a foo library, and in some cases foo-- is used for bindings that are supposed to be internal.