Function: rx--translate-backref
rx--translate-backref is a byte-compiled function defined in rx.el.gz.
Signature
(rx--translate-backref BODY)
Documentation
Translate the backref form. Return (REGEXP . PRECEDENCE).
Source Code
;; Defined in /usr/src/emacs/lisp/emacs-lisp/rx.el.gz
(defun rx--translate-backref (body)
"Translate the `backref' form. Return (REGEXP . PRECEDENCE)."
(unless (and (= (length body) 1) (integerp (car body)) (<= 1 (car body) 9))
(error "rx `backref' requires an argument in the range 1..9"))
(cons (list "\\" (number-to-string (car body))) t))