From 698f8c2f01ea549d77d7dc3338a12e04c11057b9 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Wed, 17 Apr 2024 14:02:58 +0200 Subject: Adding upstream version 1.64.0+dfsg1. Signed-off-by: Daniel Baumann --- src/tools/clippy/tests/ui/uninit.rs | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) create mode 100644 src/tools/clippy/tests/ui/uninit.rs (limited to 'src/tools/clippy/tests/ui/uninit.rs') diff --git a/src/tools/clippy/tests/ui/uninit.rs b/src/tools/clippy/tests/ui/uninit.rs new file mode 100644 index 000000000..dac5ce272 --- /dev/null +++ b/src/tools/clippy/tests/ui/uninit.rs @@ -0,0 +1,26 @@ +#![feature(stmt_expr_attributes)] +#![allow(clippy::let_unit_value)] + +use std::mem::{self, MaybeUninit}; + +fn main() { + let _: usize = unsafe { MaybeUninit::uninit().assume_init() }; + + // edge case: For now we lint on empty arrays + let _: [u8; 0] = unsafe { MaybeUninit::uninit().assume_init() }; + + // edge case: For now we accept unit tuples + let _: () = unsafe { MaybeUninit::uninit().assume_init() }; + + // This is OK, because `MaybeUninit` allows uninitialized data. + let _: MaybeUninit = unsafe { MaybeUninit::uninit().assume_init() }; + + // This is OK, because all constitutent types are uninit-compatible. + let _: (MaybeUninit, MaybeUninit) = unsafe { MaybeUninit::uninit().assume_init() }; + + // This is OK, because all constitutent types are uninit-compatible. + let _: (MaybeUninit, [MaybeUninit; 2]) = unsafe { MaybeUninit::uninit().assume_init() }; + + // Was a false negative. + let _: usize = unsafe { mem::MaybeUninit::uninit().assume_init() }; +} -- cgit v1.2.3