syntax_data: {"ast_node_type":"other","tokens":[{"end":62,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:                 // Compute CoroutineState<yield_ty, return_ty>
context_before:             CoroutineKind::Coroutine(_) => {
context_after:                 let state_did = tcx.require_lang_item(LangItem::CoroutineState, body.span);