Expand description
Node: cxx:Macro:Luau.VM:VM/src/lobject.h:494:getnodekey
Source: VM/src/lobject.h:494-501 (hand-checked)
C++ copies n_->key.tt — the 4-bit tt BITFIELD only, not the packed
tt|next word (the original translation wrote key.tt_next into tt,
smearing the next-pointer bits into the type tag). The Rust TKey packs
the bitfields as tt_next with a tt() accessor.