This section describes the functions for accessing the components of a marker object.
nil if it points nowhere.
nil if it points nowhere.
(setq m (make-marker))
     => #<marker in no buffer>
(marker-position m)
     => nil
(marker-buffer m)
     => nil
(set-marker m 3770 (current-buffer))
     => #<marker at 3770 in markers.texi>
(marker-buffer m)
     => #<buffer markers.texi>
(marker-position m)
     => 3770
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