//@ 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> } #[repr(packed(2))] struct P2_Option { a: Option> } #[repr(packed(2))] struct P2S7_Option { a: f32, b: u8, c: u16, d: Option> } // 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::()); check!(P1S7_Option, 1, 7 + mem::size_of::>>()); 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::(), 2)); check!(P2S7_Option, 2, align_to(7 + mem::size_of::(), 2)); }