syntax_data: {"ast_node_type":"other","tokens":[{"end":58,"kind":"keyword","start":0,"text":"ExprKind::Assign"}]}
source_snippet:             ExprKind::Assign { lhs, rhs } => (*lhs, *rhs),
context_before:         let (destination, call) = parse_by_kind!(self, args[0], _, "function call",
context_after:         );