Re: Is it permissible to bind C-<backspace> and/or C-<delete> in a major mode?

[Richard Stallman]

In my previous message I was thinking C-c BACKSPACE and C-c DELETE by
mistake.  Those, by analogy, would make sense for major modes to bind.
C-BACKSPACE is a different issue.

    Other programs allow C-<backspace> to delete backwards a word and
    C-<delete> to delete forwards a word.  (Like C-<left> and C-<right>
    which move by words.)

This is in fact what C-BACKSPACE and C-DELETE do in Emacs.  So major
modes should not change them, unless to a mode-specific better way to
delete words.