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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:02:58 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:02:58 +0000 |
commit | 698f8c2f01ea549d77d7dc3338a12e04c11057b9 (patch) | |
tree | 173a775858bd501c378080a10dca74132f05bc50 /src/tools/clippy/tests/ui/transmuting_null.rs | |
parent | Initial commit. (diff) | |
download | rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.tar.xz rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.zip |
Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/tools/clippy/tests/ui/transmuting_null.rs')
-rw-r--r-- | src/tools/clippy/tests/ui/transmuting_null.rs | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/src/tools/clippy/tests/ui/transmuting_null.rs b/src/tools/clippy/tests/ui/transmuting_null.rs new file mode 100644 index 000000000..ea3ee8edc --- /dev/null +++ b/src/tools/clippy/tests/ui/transmuting_null.rs @@ -0,0 +1,30 @@ +#![allow(dead_code)] +#![warn(clippy::transmuting_null)] +#![allow(clippy::zero_ptr)] +#![allow(clippy::transmute_ptr_to_ref)] +#![allow(clippy::eq_op)] + +// Easy to lint because these only span one line. +fn one_liners() { + unsafe { + let _: &u64 = std::mem::transmute(0 as *const u64); + let _: &u64 = std::mem::transmute(std::ptr::null::<u64>()); + } +} + +pub const ZPTR: *const usize = 0 as *const _; +pub const NOT_ZPTR: *const usize = 1 as *const _; + +fn transmute_const() { + unsafe { + // Should raise a lint. + let _: &u64 = std::mem::transmute(ZPTR); + // Should NOT raise a lint. + let _: &u64 = std::mem::transmute(NOT_ZPTR); + } +} + +fn main() { + one_liners(); + transmute_const(); +} |