rust/tests/ui/dst/dst-bad-deep.rs
2023-01-11 09:32:08 +00:00

16 lines
480 B
Rust

// Try to initialise a DST struct where the lost information is deeply nested.
// This is an error because it requires an unsized rvalue. This is a problem
// because it would require stack allocation of an unsized temporary (*g in the
// test).
struct Fat<T: ?Sized> {
ptr: T
}
pub fn main() {
let f: Fat<[isize; 3]> = Fat { ptr: [5, 6, 7] };
let g: &Fat<[isize]> = &f;
let h: &Fat<Fat<[isize]>> = &Fat { ptr: *g };
//~^ ERROR the size for values of type
}