mirror of https://github.com/rust-lang/rust
30 lines
508 B
Rust
30 lines
508 B
Rust
//@ run-pass
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// Check that unsizing does not change which field is considered for niche layout.
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#![allow(dead_code)]
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#[derive(Clone)]
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struct WideptrField<T: ?Sized> {
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first: usize,
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second: usize,
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niche: NicheAtEnd,
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tail: T,
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}
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#[derive(Clone)]
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#[repr(C)]
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struct NicheAtEnd {
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arr: [u8; 7],
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b: bool,
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}
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type Tail = [bool; 8];
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fn main() {
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assert_eq!(
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core::mem::offset_of!(WideptrField<Tail>, niche),
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core::mem::offset_of!(WideptrField<dyn Send>, niche)
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);
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}
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