-(defun cl--compiler-macro-cXXr (form x)
- (let* ((head (car form))
- (n (symbol-name (car form)))
- (i (- (length n) 2)))
- (if (not (string-match "c[ad]+r\\'" n))
- (if (and (fboundp head) (symbolp (symbol-function head)))
- (cl--compiler-macro-cXXr (cons (symbol-function head) (cdr form))
- x)
- (error "Compiler macro for cXXr applied to non-cXXr form"))
- (while (> i (match-beginning 0))
- (setq x (list (if (eq (aref n i) ?a) 'car 'cdr) x))
- (setq i (1- i)))
- x)))