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

[Alan Mackenzie]

Hi, Emacs!

I'm thinking about binding these key sequences in CC Mode.  In
particular, to c-hungry-backspace and c-hungry-delete-forward.  There is
an obvious mnemonic and systematic reason for this.

However.....  Will this offend any Emacs conventions?

The page "Emacs Lisp Coding Convention" in the Elisp manual gives no help
on such key sequences.  C-c C-<letter> and C-c C-[{}<>;:] are for major
modes,  C-c <letter> is for individual users, C-c <other punctuation> is
for minor modes.

But what of other C-c combinations?  There are no rules about them in
this Elisp manual page, and no uses of them in the Emacs manual "Key
Index".

Are they in a free-fire zone?

-- 
Alan Mackenzie (Munich, Germany)