rust/tests/ui/author/issue_3849.stdout

if_chain! {
    if let StmtKind::Local(ref local) = stmt.kind;
    if let Some(ref init) = local.init;
    if let ExprKind::Call(ref func, ref args) = init.kind;
    if let ExprKind::Path(ref path) = func.kind;
    if match_qpath(path, &["std", "mem", "transmute"]);
    if args.len() == 1;
    if let ExprKind::Path(ref path1) = args[0].kind;
    if match_qpath(path1, &["ZPTR"]);
    if let PatKind::Wild = local.pat.kind;
    then {
        // report your lint here
    }
}