patch 8.2.2728: special key names don't work if 'isident' is cleared Commit: https://github.com/vim/vim/commit/e3d1f4c982bd0fe05496448d7868268c75ff7bfb Author: Bram Moolenaar <Bram@vim.org> Date: Tue Apr 6 20:21:59 2021 +0200 patch 8.2.2728: special key names don't work if 'isident' is cleared Problem: Special key names don't work if 'isident' is cleared. Solution: Add vim_isNormalIDc() and use it for special key names. (closes #2389)

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}\")