Improve the implementation, documentation of #'labels, #'flet. lisp/ChangeLog addition: 2011-09-07 Aidan Kehoe <kehoea@parhasard.net> * bytecomp.el: * bytecomp.el (for-effect): Move this earlier in the file, it's referenced in byte-compile-initial-macro-environment. * bytecomp.el (byte-compile-initial-macro-environment): In the byte-compile-macro-environment definition for #'labels, put off the compiling the lambda bodies until the point where the rest of the form is being compiled, allowing the lambda bodies to access appropriate values for byte-compile-bound-variables, and reducing excessive warning about free variables. Add a byte-compile-macro-environment definition for #'flet. This modifies byte-compile-function-environment appropriately, and warns about bindings of functions that have macro definitions in the current environment, about functions that have byte codes, and about functions that have byte-compile methods (which may not do what the user wants at runtime). * bytecomp.el (byte-compile-funcall): If FUNCTION is constant, call #'byte-compile-callargs-warn if that's appropriate, giving warnings about problems with calling functions bound with #'labels. * cl-macs.el: * cl-macs.el (flet): Mention the main difference from Common Lisp, that the bindings are dynamic, not lexical. Counsel the use of #'labels, not #'flet, for this and other reasons. Explain the limited single use case for #'flet. Cross-reference to bytecomp.el in a comment. * cl-macs.el (labels): Go into detail on which functions may be called from where. Explain how to access the function definition of a label within FORM. Add a comment cross-referencing to bytecomp.el. man/ChangeLog addition: 2011-09-07 Aidan Kehoe <kehoea@parhasard.net> * cl.texi (Function Bindings): Move #'labels first, describe it in more detail, explaining that it is to be preferred over #'flet, and explaining why. Explain that dynamic bindings with #'flet will also not work when functions are accessed through their bytecodes.

;;; Test geometry setting for frames.
;;;
;;; Copyright (C) 1997 Martin Buchholz
;;;
;; This file is part of XEmacs.
;; 
;; XEmacs is free software: you can redistribute it and/or modify it
;; under the terms of the GNU General Public License as published by the
;; Free Software Foundation, either version 3 of the License, or (at your
;; option) any later version.
;; 
;; XEmacs is distributed in the hope that it will be useful, but WITHOUT
;; ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
;; FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
;; for more details.
;; 
;; You should have received a copy of the GNU General Public License
;; along with XEmacs.  If not, see <http://www.gnu.org/licenses/>.

(defmacro check-frame-geometry (xx yy)
  `(loop for frame in (list nil (selected-frame))
	 do
	 (assert (eq (frame-property frame 'top)  ,yy))
	 (assert (eq (frame-property frame 'left) ,xx))
	 (assert (eq (frame-property frame 'top)  ,yy))
	 (assert (eq (frame-property frame 'left) ,xx))
	 (loop for plist in
	       (list (frame-properties)
		     (frame-properties nil)
		     (frame-properties (selected-frame)))
	       do
	       (assert (eq (plist-get plist 'top)  ,yy))
	       (assert (eq (plist-get plist 'left) ,xx)))))

(loop for (x y) in '((0 0) (1 1) (3 3) (9 9) (10 20) (20 40) (40 80) (100 200))
      do
      (loop for frame in (list nil (selected-frame))
	    do
	    (set-frame-properties frame `(left ,x top ,y))
	    (check-frame-geometry x y)
	    (set-frame-property frame 'top (+ y 3))
	    (check-frame-geometry x (+ y 3))
	    (set-frame-property frame 'left (+ x 3))
	    (check-frame-geometry (+ x 3) (+ y 3))))