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//@ run-pass
//@ reference: layout.aggregate.struct-size-align
//@ edition: 2018
#[allow(dead_code)]
union ReprRustUnion {
x: i32,
y: [u32; 4],
z: f32,
a: u128,
}
fn test_size_contains_each_type() {
assert!(core::mem::size_of::<i32>() <= core::mem::size_of::<ReprRustUnion>());
assert!(core::mem::size_of::<[u32; 4]>() <= core::mem::size_of::<ReprRustUnion>());
assert!(core::mem::size_of::<f32>() <= core::mem::size_of::<ReprRustUnion>());
assert!(core::mem::size_of::<u128>() <= core::mem::size_of::<ReprRustUnion>());
}
fn test_size_contains_all_fields() {
assert!(
(core::mem::offset_of!(ReprRustUnion, x) + core::mem::size_of::<i32>())
<= core::mem::size_of::<ReprRustUnion>()
);
assert!(
(core::mem::offset_of!(ReprRustUnion, y) + core::mem::size_of::<[u32; 4]>())
<= core::mem::size_of::<ReprRustUnion>()
);
assert!(
(core::mem::offset_of!(ReprRustUnion, z) + core::mem::size_of::<f32>())
<= core::mem::size_of::<ReprRustUnion>()
);
assert!(
(core::mem::offset_of!(ReprRustUnion, a) + core::mem::size_of::<u128>())
<= core::mem::size_of::<ReprRustUnion>()
);
}
fn test_size_modulo_align() {
assert_eq!(core::mem::size_of::<ReprRustUnion>() % core::mem::align_of::<ReprRustUnion>(), 0);
}
fn main() {
test_size_contains_each_type();
test_size_contains_all_fields();
test_size_modulo_align();
}
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