syntax_data: {"ast_node_type":"other","tokens":[{"end":69,"kind":"keyword","start":0,"text":"Rvalue::BinaryOp(ref"}]}
source_snippet:             Rvalue::BinaryOp(ref _binop, box (ref lhs, ref rhs)) => {
context_before:             | Rvalue::WrapUnsafeBinder(ref operand, _) => self.gather_operand(operand),
context_after:                 self.gather_operand(lhs);