syntax_data: {"ast_node_type":"other","tokens":[{"end":34,"kind":"keyword","start":0,"text":"for"}]}
source_snippet:                 for ct in consts {
context_before:                 let consts = [start, end];
context_after:                     Ty::new_array_with_const_len(self.tcx, self.tcx.types.unit, ct).print(self)?;