syntax_data: {"ast_node_type":"variable","tokens":[{"end":78,"kind":"keyword","start":0,"text":"///"}]}
source_snippet: ///        _ if { if let Some(Some(ref mut y)) = x.0 { *y += 1 }; true } => {}
context_before: ///        (Some(Some(_)), false) => {}
context_after: ///        _ => {}