if let Some(higher::ForLoop { pat: pat, arg: arg, body: body, .. }) = higher::ForLoop::hir(expr) && let PatKind::Binding(BindingMode::NONE, _, name, None) = pat.kind && name.as_str() == "i" && let ExprKind::Struct(qpath, fields, None) = arg.kind && matches!(qpath, QPath::LangItem(LangItem::Range, _)) && fields.len() == 2 && fields[0].ident.as_str() == "start" && let ExprKind::Lit(ref lit) = fields[0].expr.kind && let LitKind::Int(0, LitIntType::Unsuffixed) = lit.node && fields[1].ident.as_str() == "end" && let ExprKind::Lit(ref lit1) = fields[1].expr.kind && let LitKind::Int(1, LitIntType::Unsuffixed) = lit1.node && let ExprKind::Block(block, None) = body.kind && block.stmts.len() == 1 && let StmtKind::Semi(e) = block.stmts[0].kind && let ExprKind::Block(block1, None) = e.kind && block1.stmts.len() == 1 && let StmtKind::Semi(e1) = block1.stmts[0].kind && let ExprKind::Call(func, args) = e1.kind && paths::STD_IO_STDIO__PRINT.matches_path(cx, func) // Add the path to `clippy_utils::paths` if needed && args.len() == 1 && let ExprKind::Block(block2, None) = args[0].kind && block2.stmts.len() == 2 && let StmtKind::Let(local) = block2.stmts[0].kind && let Some(init) = local.init && let ExprKind::Tup(elements) = init.kind && elements.len() == 1 && let ExprKind::AddrOf(BorrowKind::Ref, Mutability::Not, inner) = elements[0].kind && let PatKind::Binding(BindingMode::NONE, _, name1, None) = local.pat.kind && name1.as_str() == "args" && let StmtKind::Let(local1) = block2.stmts[1].kind && let Some(init1) = local1.init && let ExprKind::Array(elements1) = init1.kind && elements1.len() == 1 && let ExprKind::Call(func1, args1) = elements1[0].kind && paths::CORE_FMT_RT_ARGUMENT_NEW_DISPLAY.matches_path(cx, func1) // Add the path to `clippy_utils::paths` if needed && args1.len() == 1 && let ExprKind::Field(object, field_name) = args1[0].kind && field_name.as_str() == "0" && let PatKind::Binding(BindingMode::NONE, _, name2, None) = local1.pat.kind && name2.as_str() == "args" && let Some(trailing_expr) = block2.expr && let ExprKind::Call(func2, args2) = trailing_expr.kind && paths::CORE_FMT_RT_NEW_V1.matches_path(cx, func2) // Add the path to `clippy_utils::paths` if needed && args2.len() == 2 && let ExprKind::AddrOf(BorrowKind::Ref, Mutability::Not, inner1) = args2[0].kind && let ExprKind::Array(elements2) = inner1.kind && elements2.len() == 2 && let ExprKind::Lit(ref lit2) = elements2[0].kind && let LitKind::Str(s, _) = lit2.node && s.as_str() == "" && let ExprKind::Lit(ref lit3) = elements2[1].kind && let LitKind::Str(s1, _) = lit3.node && s1.as_str() == "\n" && let ExprKind::AddrOf(BorrowKind::Ref, Mutability::Not, inner2) = args2[1].kind && block1.expr.is_none() && block.expr.is_none() { // report your lint here }