{"ast_node_type":"variable","tokens":[{"end":67,"kind":"keyword","start":0,"text":"let"}]}
                    let rhs_ty = self.expr_ty_without_adjust(*rhs);
                    let lhs_ty = self.expr_ty_without_adjust(*lhs);
                    if matches!(op, BinaryOp::CmpOp(syntax::ast::CmpOp::Eq { .. }))