syntax_data: {"ast_node_type":"other","tokens":[{"end":88,"kind":"keyword","start":0,"text":"[(poll_ready_discr,"}]}
source_snippet:                     [(poll_ready_discr, ready_block), (poll_pending_discr, yield_block)]
context_before:                 targets: SwitchTargets::new(
context_after:                         .into_iter(),