| // Copyright 2013 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 <LICENSE-APACHE or |
| // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license |
| // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your |
| // option. This file may not be copied, modified, or distributed |
| // except according to those terms. |
| |
| |
| use std::mem::{size_of, align_of}; |
| |
| #[repr(i8)] |
| enum Ei8 { |
| Ai8 = 0, |
| Bi8 = 1 |
| } |
| |
| #[repr(u8)] |
| enum Eu8 { |
| Au8 = 0, |
| Bu8 = 1 |
| } |
| |
| #[repr(i16)] |
| enum Ei16 { |
| Ai16 = 0, |
| Bi16 = 1 |
| } |
| |
| #[repr(u16)] |
| enum Eu16 { |
| Au16 = 0, |
| Bu16 = 1 |
| } |
| |
| #[repr(i32)] |
| enum Ei32 { |
| Ai32 = 0, |
| Bi32 = 1 |
| } |
| |
| #[repr(u32)] |
| enum Eu32 { |
| Au32 = 0, |
| Bu32 = 1 |
| } |
| |
| #[repr(i64)] |
| enum Ei64 { |
| Ai64 = 0, |
| Bi64 = 1 |
| } |
| |
| #[repr(u64)] |
| enum Eu64 { |
| Au64 = 0, |
| Bu64 = 1 |
| } |
| |
| #[repr(isize)] |
| enum Eint { |
| Aint = 0, |
| Bint = 1 |
| } |
| |
| #[repr(usize)] |
| enum Euint { |
| Auint = 0, |
| Buint = 1 |
| } |
| |
| #[repr(u8)] |
| enum Eu8NonCLike<T> { |
| _None, |
| _Some(T), |
| } |
| |
| #[repr(i64)] |
| enum Ei64NonCLike<T> { |
| _None, |
| _Some(T), |
| } |
| |
| #[repr(u64)] |
| enum Eu64NonCLike<T> { |
| _None, |
| _Some(T), |
| } |
| |
| pub fn main() { |
| assert_eq!(size_of::<Ei8>(), 1); |
| assert_eq!(size_of::<Eu8>(), 1); |
| assert_eq!(size_of::<Ei16>(), 2); |
| assert_eq!(size_of::<Eu16>(), 2); |
| assert_eq!(size_of::<Ei32>(), 4); |
| assert_eq!(size_of::<Eu32>(), 4); |
| assert_eq!(size_of::<Ei64>(), 8); |
| assert_eq!(size_of::<Eu64>(), 8); |
| assert_eq!(size_of::<Eint>(), size_of::<isize>()); |
| assert_eq!(size_of::<Euint>(), size_of::<usize>()); |
| assert_eq!(size_of::<Eu8NonCLike<()>>(), 1); |
| assert_eq!(size_of::<Ei64NonCLike<()>>(), 8); |
| assert_eq!(size_of::<Eu64NonCLike<()>>(), 8); |
| let u8_expected_size = round_up(9, align_of::<Eu64NonCLike<u8>>()); |
| assert_eq!(size_of::<Eu64NonCLike<u8>>(), u8_expected_size); |
| let array_expected_size = round_up(28, align_of::<Eu64NonCLike<[u32; 5]>>()); |
| assert_eq!(size_of::<Eu64NonCLike<[u32; 5]>>(), array_expected_size); |
| assert_eq!(size_of::<Eu64NonCLike<[u32; 6]>>(), 32); |
| } |
| |
| // Rounds x up to the next multiple of a |
| fn round_up(x: usize, a: usize) -> usize { |
| ((x + (a - 1)) / a) * a |
| } |