Function etex_node_type 

pub fn etex_node_type(t: u8, subtype: u16) -> i32

e-TeX’s \lastnodetype value for a node of LuaTeX type t: −1 none, 0 glyph, 1 hlist, 2 vlist, 3 rule, 4 ins, 5 mark, 6 adjust, 7 ligature, 8 disc, 9 whatsit, 10 math, 11 glue, 12 kern, 13 penalty, 14 unset, 15 math mode nodes.