| #![feature(rustc_attrs)] |
| |
| // Show that `homogeneous_aggregate` code ignores zero-length C |
| // arrays. This matches the recent C standard, though not the |
| // behavior of all older compilers, which sometimes consider `T[0]` to |
| // be a "flexible array member" (see discussion on #56877 for |
| // details). |
| |
| #[repr(C)] |
| pub struct Foo { |
| x: u32 |
| } |
| |
| #[repr(C)] |
| pub struct Middle { |
| pub a: f32, |
| pub foo: [Foo; 0], |
| pub b: f32, |
| } |
| |
| #[rustc_layout(homogeneous_aggregate)] |
| pub type TestMiddle = Middle; |
| //~^ ERROR homogeneous_aggregate: Ok(Homogeneous |
| |
| #[repr(C)] |
| pub struct Final { |
| pub a: f32, |
| pub b: f32, |
| pub foo: [Foo; 0], |
| } |
| |
| #[rustc_layout(homogeneous_aggregate)] |
| pub type TestFinal = Final; |
| //~^ ERROR homogeneous_aggregate: Ok(Homogeneous |
| |
| fn main() { } |
