mirror of https://github.com/rust-lang/rust.git
27 lines
1.0 KiB
Rust
27 lines
1.0 KiB
Rust
#![feature(stmt_expr_attributes)]
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#![allow(clippy::let_unit_value)]
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use std::mem::{self, MaybeUninit};
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fn main() {
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let _: usize = unsafe { MaybeUninit::uninit().assume_init() };
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// edge case: For now we lint on empty arrays
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let _: [u8; 0] = unsafe { MaybeUninit::uninit().assume_init() };
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// edge case: For now we accept unit tuples
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let _: () = unsafe { MaybeUninit::uninit().assume_init() };
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// This is OK, because `MaybeUninit` allows uninitialized data.
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let _: MaybeUninit<usize> = unsafe { MaybeUninit::uninit().assume_init() };
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// This is OK, because all constitutent types are uninit-compatible.
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let _: (MaybeUninit<usize>, MaybeUninit<bool>) = unsafe { MaybeUninit::uninit().assume_init() };
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// This is OK, because all constitutent types are uninit-compatible.
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let _: (MaybeUninit<usize>, [MaybeUninit<bool>; 2]) = unsafe { MaybeUninit::uninit().assume_init() };
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// Was a false negative.
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let _: usize = unsafe { mem::MaybeUninit::uninit().assume_init() };
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}
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