| if let ExprKind::Block(block, None) = expr.kind |
| && block.stmts.len() == 2 |
| && let StmtKind::Let(local) = block.stmts[0].kind |
| && let Some(init) = local.init |
| && let ExprKind::Lit(ref lit) = init.kind |
| && let LitKind::Int(42, LitIntType::Signed(IntTy::I32)) = lit.node |
| && let PatKind::Binding(BindingMode::NONE, _, name, None) = local.pat.kind |
| && name.as_str() == "x" |
| && let StmtKind::Semi(e) = block.stmts[1].kind |
| && let ExprKind::Block(block1, None) = e.kind |
| && block1.stmts.len() == 1 |
| && let StmtKind::Let(local1) = block1.stmts[0].kind |
| && let Some(init1) = local1.init |
| && let ExprKind::Unary(UnOp::Neg, inner) = init1.kind |
| && let PatKind::Wild = local1.pat.kind |
| && block1.expr.is_none() |
| && block.expr.is_none() |
| { |
| // report your lint here |
| } |
