// Copyright 2015 The Rust Project Developers. See the COPYRIGHT // file at the top-level directory of this distribution and at // http://rust-lang.org/COPYRIGHT. // // Licensed under the Apache License, Version 2.0 or the MIT license // , at your // option. This file may not be copied, modified, or distributed // except according to those terms. //`#[cfg]` on struct field permits empty unusable struct struct S { #[cfg(untrue)] a: int, } fn main() { let s = S {}; }