rust/tests/ui/layout/homogeneous-aggr-zero-sized-c-struct.rs
2023-01-11 09:32:08 +00:00

37 lines
769 B
Rust

#![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() { }