mirror of https://github.com/rust-lang/rust
52 lines
1004 B
Rust
52 lines
1004 B
Rust
#![feature(extern_types)]
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use std::mem::offset_of;
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struct Alpha {
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x: u8,
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y: u16,
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z: [u8],
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}
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trait Trait {}
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struct Beta {
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x: u8,
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y: u16,
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z: dyn Trait,
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}
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extern {
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type Extern;
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}
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struct Gamma {
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x: u8,
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y: u16,
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z: Extern,
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}
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struct Delta<T: ?Sized> {
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x: u8,
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y: u16,
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z: T,
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}
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fn main() {
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offset_of!(Alpha, z); //~ ERROR the size for values of type
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offset_of!(Beta, z); //~ ERROR the size for values of type
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offset_of!(Gamma, z); //~ ERROR the size for values of type
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offset_of!((u8, dyn Trait), 0); // ok
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offset_of!((u8, dyn Trait), 1); //~ ERROR the size for values of type
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}
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fn delta() {
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offset_of!(Delta<Alpha>, z); //~ ERROR the size for values of type
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offset_of!(Delta<Extern>, z); //~ ERROR the size for values of type
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offset_of!(Delta<dyn Trait>, z); //~ ERROR the size for values of type
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}
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fn generic_with_maybe_sized<T: ?Sized>() -> usize {
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offset_of!(Delta<T>, z) //~ ERROR the size for values of type
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}
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