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#![feature(rustc_attrs)]
// Various tests around the behavior of zero-sized arrays and
// unions. This matches the behavior of modern C compilers, though
// older compilers (and sometimes clang) treat `T[0]` as a "flexible
// array member". See more
// details in #56877.
#[derive(Copy, Clone)]
#[repr(C)]
struct Empty { }
#[derive(Copy, Clone)]
#[repr(C)]
struct Empty2 {
e: Empty
}
#[derive(Copy, Clone)]
#[repr(C)]
struct Empty3 {
z: [f32; 0],
}
#[derive(Copy, Clone)]
#[repr(C)]
struct Empty4 {
e: Empty3
}
#[repr(C)]
union U1 {
s: Empty
}
#[repr(C)]
union U2 {
s: Empty2
}
#[repr(C)]
union U3 {
s: Empty3
}
#[repr(C)]
union U4 {
s: Empty4
}
#[repr(C)]
struct Baz1 {
x: f32,
y: f32,
u: U1,
}
#[rustc_layout(homogeneous_aggregate)]
type TestBaz1 = Baz1;
//~^ ERROR homogeneous_aggregate: Ok(Homogeneous
#[repr(C)]
struct Baz2 {
x: f32,
y: f32,
u: U2,
}
#[rustc_layout(homogeneous_aggregate)]
type TestBaz2 = Baz2;
//~^ ERROR homogeneous_aggregate: Ok(Homogeneous
#[repr(C)]
struct Baz3 {
x: f32,
y: f32,
u: U3,
}
#[rustc_layout(homogeneous_aggregate)]
type TestBaz3 = Baz3;
//~^ ERROR homogeneous_aggregate: Ok(Homogeneous
#[repr(C)]
struct Baz4 {
x: f32,
y: f32,
u: U4,
}
#[rustc_layout(homogeneous_aggregate)]
type TestBaz4 = Baz4;
//~^ ERROR homogeneous_aggregate: Ok(Homogeneous
fn main() { }
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