// Copyright 2013-2014 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. use std::fmt; use std::mem; #[repr(packed)] #[derive(Copy, Clone)] struct Foo { bar: u8, baz: u64 } impl PartialEq for Foo { fn eq(&self, other: &Foo) -> bool { self.bar == other.bar && self.baz == other.baz } } impl fmt::Debug for Foo { fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { let bar = self.bar; let baz = self.baz; f.debug_struct("Foo") .field("bar", &bar) .field("baz", &baz) .finish() } } pub fn main() { let foos = [Foo { bar: 1, baz: 2 }; 10]; assert_eq!(mem::size_of::<[Foo; 10]>(), 90); for i in 0..10 { assert_eq!(foos[i], Foo { bar: 1, baz: 2}); } for &foo in &foos { assert_eq!(foo, Foo { bar: 1, baz: 2 }); } }