if_let_chain!{[
    let Expr_::ExprBinary(ref op, ref left, ref right) = expr.node,
    BinOp_::BiEq == op.node,
    let Expr_::ExprBinary(ref op1, ref left1, ref right1) = left.node,
    BinOp_::BiBitAnd == op1.node,
    let Expr_::ExprPath(ref path) = left1.node,
    match_path(path, &["x"]),
    let Expr_::ExprLit(ref lit) = right1.node,
    let LitKind::Int(15, _) = lit.node,
    let Expr_::ExprLit(ref lit1) = right.node,
    let LitKind::Int(0, _) = lit1.node,
], {
    // report your lint here
}}