| // run-pass |
| #![allow(dead_code)] |
| #![allow(non_camel_case_types)] |
| #![allow(non_upper_case_globals)] |
| |
| use std::mem; |
| |
| #[repr(packed)] |
| struct P1S4 { |
| a: u8, |
| b: [u8; 3], |
| } |
| |
| #[repr(packed(2))] |
| struct P2S4 { |
| a: u8, |
| b: [u8; 3], |
| } |
| |
| #[repr(packed)] |
| struct P1S5 { |
| a: u8, |
| b: u32 |
| } |
| |
| #[repr(packed(2))] |
| struct P2S2 { |
| a: u8, |
| b: u8 |
| } |
| |
| #[repr(packed(2))] |
| struct P2S6 { |
| a: u8, |
| b: u32 |
| } |
| |
| #[repr(packed(2))] |
| struct P2S12 { |
| a: u32, |
| b: u64 |
| } |
| |
| #[repr(packed)] |
| struct P1S13 { |
| a: i64, |
| b: f32, |
| c: u8, |
| } |
| |
| #[repr(packed(2))] |
| struct P2S14 { |
| a: i64, |
| b: f32, |
| c: u8, |
| } |
| |
| #[repr(packed(4))] |
| struct P4S16 { |
| a: u8, |
| b: f32, |
| c: i64, |
| d: u16, |
| } |
| |
| #[repr(C, packed(4))] |
| struct P4CS20 { |
| a: u8, |
| b: f32, |
| c: i64, |
| d: u16, |
| } |
| |
| enum Foo { |
| Bar = 1, |
| Baz = 2 |
| } |
| |
| #[repr(packed)] |
| struct P1S3_Foo { |
| a: u8, |
| b: u16, |
| c: Foo |
| } |
| |
| #[repr(packed(2))] |
| struct P2_Foo { |
| a: Foo, |
| } |
| |
| #[repr(packed(2))] |
| struct P2S3_Foo { |
| a: u8, |
| b: u16, |
| c: Foo |
| } |
| |
| #[repr(packed)] |
| struct P1S7_Option { |
| a: f32, |
| b: u8, |
| c: u16, |
| d: Option<Box<f64>> |
| } |
| |
| #[repr(packed(2))] |
| struct P2_Option { |
| a: Option<Box<f64>> |
| } |
| |
| #[repr(packed(2))] |
| struct P2S7_Option { |
| a: f32, |
| b: u8, |
| c: u16, |
| d: Option<Box<f64>> |
| } |
| |
| // Placing packed structs in statics should work |
| static TEST_P1S4: P1S4 = P1S4 { a: 1, b: [2, 3, 4] }; |
| static TEST_P1S5: P1S5 = P1S5 { a: 3, b: 67 }; |
| static TEST_P1S3_Foo: P1S3_Foo = P1S3_Foo { a: 1, b: 2, c: Foo::Baz }; |
| static TEST_P2S2: P2S2 = P2S2 { a: 1, b: 2 }; |
| static TEST_P2S4: P2S4 = P2S4 { a: 1, b: [2, 3, 4] }; |
| static TEST_P2S6: P2S6 = P2S6 { a: 1, b: 2 }; |
| static TEST_P2S12: P2S12 = P2S12 { a: 1, b: 2 }; |
| static TEST_P4S16: P4S16 = P4S16 { a: 1, b: 2.0, c: 3, d: 4 }; |
| static TEST_P4CS20: P4CS20 = P4CS20 { a: 1, b: 2.0, c: 3, d: 4 }; |
| |
| fn align_to(value: usize, align: usize) -> usize { |
| (value + (align - 1)) & !(align - 1) |
| } |
| |
| macro_rules! check { |
| ($t:ty, $align:expr, $size:expr) => ({ |
| assert_eq!(mem::align_of::<$t>(), $align); |
| assert_eq!(mem::size_of::<$t>(), $size); |
| }); |
| } |
| |
| pub fn main() { |
| check!(P1S4, 1, 4); |
| check!(P1S5, 1, 5); |
| check!(P1S13, 1, 13); |
| check!(P1S3_Foo, 1, 3 + mem::size_of::<Foo>()); |
| check!(P1S7_Option, 1, 7 + mem::size_of::<Option<Box<f64>>>()); |
| |
| check!(P2S2, 1, 2); |
| check!(P2S4, 1, 4); |
| check!(P2S6, 2, 6); |
| check!(P2S12, 2, 12); |
| check!(P2S14, 2, 14); |
| check!(P4S16, 4, 16); |
| check!(P4CS20, 4, 20); |
| check!(P2S3_Foo, 2, align_to(3 + mem::size_of::<P2_Foo>(), 2)); |
| check!(P2S7_Option, 2, align_to(7 + mem::size_of::<P2_Option>(), 2)); |
| } |