diff options
Diffstat (limited to 'lisp/emacs-lisp/float-sup.el')
| -rw-r--r-- | lisp/emacs-lisp/float-sup.el | 31 |
1 files changed, 14 insertions, 17 deletions
diff --git a/lisp/emacs-lisp/float-sup.el b/lisp/emacs-lisp/float-sup.el index 5fa5b2431dd..375704ab6df 100644 --- a/lisp/emacs-lisp/float-sup.el +++ b/lisp/emacs-lisp/float-sup.el @@ -1,10 +1,10 @@ ;;; float-sup.el --- define some constants useful for floating point numbers. -;; Copyright (C) 1985, 1986, 1987, 2001, 2002, 2003, 2004, -;; 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 Free Software Foundation, Inc. +;; Copyright (C) 1985-1987, 2001-2012 Free Software Foundation, Inc. ;; Maintainer: FSF ;; Keywords: internal +;; Package: emacs ;; This file is part of GNU Emacs. @@ -25,36 +25,33 @@ ;;; Code: -;; Provide a meaningful error message if we are running on -;; bare (non-float) emacs. - -(if (fboundp 'atan) - nil - (error "Floating point was disabled at compile time")) - -;; provide an easy hook to tell if we are running with floats or not. -;; define pi and e via math-lib calls. (much less prone to killer typos.) +;; Provide an easy hook to tell if we are running with floats or not. +;; Define pi and e via math-lib calls (much less prone to killer typos). (defconst float-pi (* 4 (atan 1)) "The value of Pi (3.1415926...).") -(defconst pi float-pi "Obsolete since Emacs-23.3. Use `float-pi' instead.") +(progn + ;; Simulate a defconst that doesn't declare the variable dynamically bound. + (setq-default pi float-pi) + (put 'pi 'variable-documentation + "Obsolete since Emacs-23.3. Use `float-pi' instead.") + (put 'pi 'risky-local-variable t) + (push 'pi current-load-list)) (defconst float-e (exp 1) "The value of e (2.7182818...).") -(defvar e float-e "Obsolete since Emacs-23.3. Use `float-e' instead.") (defconst degrees-to-radians (/ float-pi 180.0) "Degrees to radian conversion constant.") (defconst radians-to-degrees (/ 180.0 float-pi) "Radian to degree conversion constant.") -;; these expand to a single multiply by a float when byte compiled +;; These expand to a single multiply by a float when byte compiled. (defmacro degrees-to-radians (x) - "Convert ARG from degrees to radians." + "Convert X from degrees to radians." (list '* degrees-to-radians x)) (defmacro radians-to-degrees (x) - "Convert ARG from radians to degrees." + "Convert X from radians to degrees." (list '* radians-to-degrees x)) (provide 'lisp-float-type) -;; arch-tag: e7837072-a4af-4d08-9953-8a3e755abf9d ;;; float-sup.el ends here |