NOTE: This patch has been committed. This patch adds a lisp function OBJECT-ADDRESS. See the docstring for an explanation. src/ChangeLog addition: 2011-06-01 Didier Verna <didier(a)xemacs.org&gt; * fns.c (Fobject_address): New function. * fns.c (syms_of_fns): DEFSUBR it. XEmacs 21.5 source patch: Diff command: hg diff --git --show-function Files affected: src/fns.c diff --git a/src/fns.c b/src/fns.c --- a/src/fns.c +++ b/src/fns.c ＠＠ -6213,6 +6213,36 ＠＠ not allow their modification with `objec } +DEFUN ("object-address", Fobject_address, 1, 1, 0, /* +Return OBJECT's memory address as an integer. +This may be useful for customized printing of unreadable Lisp objects. +As this only makes sense for record type objects, this function returns nil +for chars and integers. +*/ + (object)) +{ + switch (XTYPE (object)) + { + case Lisp_Type_Int_Even: + case Lisp_Type_Int_Odd: + case Lisp_Type_Char: + { + return Qnil; + } + case Lisp_Type_Record: + { + return make_integer ((EMACS_INT) GET_VOID_FROM_LISP (object)); + } + default: + { + signal_error (Qinternal_error, + "Internal error: illegal lisp object tag type", + object); + } + } +} + +  static Lisp_Object tweaked_internal_equal (Lisp_Object obj1, Lisp_Object obj2, ＠＠ -11786,6 +11816,7 ＠＠ syms_of_fns (void) DEFSUBR (Fremprop); DEFSUBR (Fobject_plist); DEFSUBR (Fobject_setplist); + DEFSUBR (Fobject_address); DEFSUBR (Fequal); DEFSUBR (Fequalp); DEFSUBR (Ffill); -- Resistance is futile. You will be jazzimilated. Scientific site: http://www.lrde.epita.fr/~didier Music (Jazz) site: http://www.didierverna.com _______________________________________________ XEmacs-Patches mailing list XEmacs-Patches(a)xemacs.org http://lists.xemacs.org/mailman/listinfo/xemacs-patches