if_chain! { if let StmtKind::Local(ref local) = stmt.kind; if let Some(ref init) = local.init; if let ExprKind::If(ref cond, ref then, Some(ref else_)) = init.kind; if let ExprKind::Block(ref block) = else_.kind; if block.stmts.len() == 1; if let StmtKind::Semi(ref e, _) = block.stmts[0].kind if let ExprKind::Binary(ref op, ref left, ref right) = e.kind; if BinOpKind::Eq == op.node; if let ExprKind::Lit(ref lit) = left.kind; if let LitKind::Int(2, _) = lit.node; if let ExprKind::Lit(ref lit1) = right.kind; if let LitKind::Int(2, _) = lit1.node; if block.expr.is_none(); if let ExprKind::Lit(ref lit2) = cond.kind; if let LitKind::Bool(true) = lit2.node; if let ExprKind::Block(ref block1) = then.kind; if block1.stmts.len() == 1; if let StmtKind::Semi(ref e1, _) = block1.stmts[0].kind if let ExprKind::Binary(ref op1, ref left1, ref right1) = e1.kind; if BinOpKind::Eq == op1.node; if let ExprKind::Lit(ref lit3) = left1.kind; if let LitKind::Int(1, _) = lit3.node; if let ExprKind::Lit(ref lit4) = right1.kind; if let LitKind::Int(1, _) = lit4.node; if block1.expr.is_none(); if let PatKind::Wild = local.pat.kind; then { // report your lint here } }