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(vc-backend-dispatch): Move definition before first use.

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Richard M. Stallman 1995-06-16 18:04:47 +00:00
parent 88a2ffaf93
commit d7eff0e04e
1 changed files with 17 additions and 17 deletions
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34
lisp/vc.el
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@ -75,6 +75,23 @@
(cons '(vc-parent-buffer vc-parent-buffer-name)
minor-mode-alist)))
;; To implement support for a new version-control system, add another
;; branch to the vc-backend-dispatch macro and fill it in in each
;; call. The variable vc-master-templates in vc-hooks.el will also
;; have to change.
(defmacro vc-backend-dispatch (f s r c)
"Execute FORM1, FORM2 or FORM3 for SCCS, RCS or CVS respectively.
If FORM3 is `RCS', use FORM2 for CVS as well as RCS.
\(CVS shares some code with RCS)."
(list 'let (list (list 'type (list 'vc-backend f)))
(list 'cond
(list (list 'eq 'type (quote 'SCCS)) s) ;; SCCS
(list (list 'eq 'type (quote 'RCS)) r) ;; RCS
(list (list 'eq 'type (quote 'CVS)) ;; CVS
(if (eq c 'RCS) r c))
)))
;; General customization
(defvar vc-suppress-confirm nil
@ -299,23 +316,6 @@ the master name of FILE if LAST is 'MASTER, or the workfile of FILE if LAST is
status)
)
;; Everything eventually funnels through these functions. To implement
;; support for a new version-control system, add another branch to the
;; vc-backend-dispatch macro and fill it in in each call. The variable
;; vc-master-templates in vc-hooks.el will also have to change.
(defmacro vc-backend-dispatch (f s r c)
"Execute FORM1, FORM2 or FORM3 depending whether we're using SCCS, RCS or CVS.
If FORM3 is RCS, use FORM2 even if we are using CVS. (CVS shares some code
with RCS)."
(list 'let (list (list 'type (list 'vc-backend f)))
(list 'cond
(list (list 'eq 'type (quote 'SCCS)) s) ;; SCCS
(list (list 'eq 'type (quote 'RCS)) r) ;; RCS
(list (list 'eq 'type (quote 'CVS)) ;; CVS
(if (eq c 'RCS) r c))
)))
;;; Save a bit of the text around POSN in the current buffer, to help
;;; us find the corresponding position again later. This works even
;;; if all markers are destroyed or corrupted.