patch 8.0.0177: BufEnter autocommand not fired for a directory commit https://github.com/vim/vim/commit/e13b9afe1283f5ae43232b5992372a0eb570666c Author: Bram Moolenaar <Bram@vim.org> Date: Fri Jan 13 22:01:02 2017 +0100 patch 8.0.0177: BufEnter autocommand not fired for a directory Problem: When opening a buffer on a directory and inside a try/catch then the BufEnter event is not triggered. Solution: Return NOTDONE from readfile() for a directory and deal with the three possible return values. (Justin M. Keyes, closes #1375, closes #1353)

TYPEMAP
VIWIN	T_VIOBJNOMUNGE
VIBUF	T_VIOBJNOMUNGE

INPUT
T_VIOBJNOMUNGE
	if (sv_isa($arg, \"${ntype}\")) {
	    IV tmp = SvIV((SV*)SvRV($arg));
	    $var = INT2PTR($type, tmp);
	    if (!tmp)
		croak(\"$ntype no longer exists\");
	}
	else
	    croak(\"$var is not of type ${ntype}\")