Function: marker-insertion-type
marker-insertion-type is a function defined in marker.c.
Signature
(marker-insertion-type MARKER)
Documentation
Return insertion type of MARKER: t if it stays after inserted text.
The value nil means the marker stays before text inserted there.
Probably introduced at or before Emacs version 19.30.
Source Code
// Defined in /usr/src/emacs/src/marker.c
{
CHECK_MARKER (marker);
return XMARKER (marker)->insertion_type ? Qt : Qnil;
}