commit https://github.com/vim/vim/commit/9cdf86b86f5fdb5a45b682f336846f9d9a9c6f1f Author: Bram Moolenaar <Bram@vim.org> Date: Sun Mar 13 19:04:51 2016 +0100 patch 7.4.1558 Problem: It is not easy to find out what windows display a buffer. Solution: Add win_findbuf().

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}\")