syntax_data: {"ast_node_type":"other","tokens":[{"end":38,"kind":"keyword","start":0,"text":"IndexVec::from_raw(vec![val]),"}]}
source_snippet:         IndexVec::from_raw(vec![val]),
context_before:         Box::new(AggregateKind::Adt(poll_def_id, VariantIdx::from_usize(0), args, None, None)),
context_after:     );