syntax_data: {"ast_node_type":"variable","tokens":[{"end":86,"kind":"keyword","start":0,"text":"if"}]}
source_snippet:                         if let Some(op_with_overflow) = op.wrapping_to_overflowing() {
context_before:                     ExprKind::Binary { op, lhs, rhs } => {
context_after:                             Ok(Rvalue::BinaryOp(