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// run-pass
#![allow(dead_code)]
#![allow(non_camel_case_types)]
use std::mem;
#[repr(packed)]
struct P1S4(u8,[u8; 3]);
#[repr(packed(2))]
struct P2S4(u8,[u8; 3]);
#[repr(packed)]
struct P1S5(u8, u32);
#[repr(packed(2))]
struct P2S6(u8, u32);
#[repr(packed)]
struct P1S13(i64, f32, u8);
#[repr(packed(2))]
struct P2S14(i64, f32, u8);
#[repr(packed(4))]
struct P4S16(u8, f32, i64, u16);
#[repr(C, packed(4))]
struct P4CS20(u8, f32, i64, u16);
enum Foo {
Bar = 1,
Baz = 2
}
#[repr(packed)]
struct P1S3_Foo(u8, u16, Foo);
#[repr(packed(2))]
struct P2_Foo(Foo);
#[repr(packed(2))]
struct P2S3_Foo(u8, u16, Foo);
#[repr(packed)]
struct P1S7_Option(f32, u8, u16, Option<Box<f64>>);
#[repr(packed(2))]
struct P2_Option(Option<Box<f64>>);
#[repr(packed(2))]
struct P2S7_Option(f32, u8, u16, Option<Box<f64>>);
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!(P2S4, 1, 4);
check!(P2S6, 2, 6);
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));
}
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