patch 9.0.1159: extends argument for class not implemented yet Commit: https://github.com/vim/vim/commit/8367716a6e9589d61a771e6c329da05c9b55e61a Author: Bram Moolenaar <Bram@vim.org> Date: Sun Jan 8 19:54:10 2023 +0000 patch 9.0.1159: extends argument for class not implemented yet Problem: Extends argument for class not implemented yet. Solution: Basic implementation of "extends".

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}\")