Function: gap-size
gap-size is a function defined in editfns.c.
Signature
(gap-size)
Documentation
Return the size of the current buffer's gap.
See also gap-position.
Probably introduced at or before Emacs version 20.4.
Source Code
// Defined in /usr/src/emacs/src/editfns.c
{
Lisp_Object temp;
XSETFASTINT (temp, GAP_SIZE);
return temp;
}