@c -*-texinfo-*-
@c This is part of the GNU Emacs Lisp Reference Manual.
-@c Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995, 1998, 1999, 2000, 2001
-@c Free Software Foundation, Inc.
+@c Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995, 1998, 1999, 2000, 2001,
+@c 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
@c See the file elisp.texi for copying conditions.
@setfilename ../info/positions
@node Positions, Markers, Frames, Top
often speak of the character ``at'' a position, meaning the character
after that position.
- Positions are usually represented as integers starting from 1, but can
-also be represented as @dfn{markers}---special objects that relocate
-automatically when text is inserted or deleted so they stay with the
-surrounding characters. Functions that expect an argument to be a
-position (an integer), but accept a marker as a substitute, normally
-ignore the marker buffer. Of course, markers used this way usually
-point to a position in the buffer that the function operates on, but
-that is entirely the programmer's responsibility. @xref{Markers}.
+ Positions are usually represented as integers starting from 1, but
+can also be represented as @dfn{markers}---special objects that
+relocate automatically when text is inserted or deleted so they stay
+with the surrounding characters. Functions that expect an argument to
+be a position (an integer), but accept a marker as a substitute,
+normally ignore which buffer the marker points into; they convert the
+marker to an integer, and use that integer, exactly as if you had
+passed the integer as the argument, even if the marker points to the
+``wrong'' buffer. A marker that points nowhere cannot convert to an
+integer; using it instead of an integer causes an error.
+@xref{Markers}.
See also the ``field'' feature (@pxref{Fields}), which provides
functions that are used by many cursor-motion commands.
When you use @code{compute-motion} for the minibuffer, you need to use
@code{minibuffer-prompt-width} to get the horizontal position of the
-beginning of the first screen line. @xref{Minibuffer Misc}.
+beginning of the first screen line. @xref{Minibuffer Contents}.
@end defun
@node List Motion