diff options
Diffstat (limited to 'lisp/emacs-lisp/cl-macs.el')
| -rw-r--r-- | lisp/emacs-lisp/cl-macs.el | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/lisp/emacs-lisp/cl-macs.el b/lisp/emacs-lisp/cl-macs.el index 7d8108bcd87..e48835adeb1 100644 --- a/lisp/emacs-lisp/cl-macs.el +++ b/lisp/emacs-lisp/cl-macs.el @@ -1769,6 +1769,7 @@ Example: (defsetf frame-visible-p cl-set-frame-visible-p) (defsetf frame-width set-screen-width t) (defsetf frame-parameter set-frame-parameter t) +(defsetf terminal-parameter set-terminal-parameter) (defsetf getenv setenv t) (defsetf get-register set-register) (defsetf global-key-binding global-set-key) @@ -1821,10 +1822,16 @@ Example: (defsetf x-get-secondary-selection x-own-secondary-selection t) (defsetf x-get-selection x-own-selection t) +;; This is a hack that allows (setf (eq a 7) B) to mean either +;; (setq a 7) or (setq a nil) depending on whether B is nil or not. +;; This is useful when you have control over the PLACE but not over +;; the VALUE, as is the case in define-minor-mode's :variable. +(defsetf eq (a b) (v) `(setf ,a (if ,v ,b (not ,b)))) + ;;; More complex setf-methods. -;;; These should take &environment arguments, but since full arglists aren't -;;; available while compiling cl-macs, we fake it by referring to the global -;;; variable cl-macro-environment directly. +;; These should take &environment arguments, but since full arglists aren't +;; available while compiling cl-macs, we fake it by referring to the global +;; variable cl-macro-environment directly. (define-setf-method apply (func arg1 &rest rest) (or (and (memq (car-safe func) '(quote function function*)) |