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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/test/ui/borrowck/borrowck-union-borrow-nested.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/test/ui/borrowck/borrowck-union-borrow-nested.rs')
-rw-r--r-- | src/test/ui/borrowck/borrowck-union-borrow-nested.rs | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/src/test/ui/borrowck/borrowck-union-borrow-nested.rs b/src/test/ui/borrowck/borrowck-union-borrow-nested.rs new file mode 100644 index 000000000..b3a6670fa --- /dev/null +++ b/src/test/ui/borrowck/borrowck-union-borrow-nested.rs @@ -0,0 +1,31 @@ +#[derive(Clone, Copy)] +struct S { + a: u8, + b: u16, +} + +#[derive(Clone, Copy)] +union U { + s: S, + c: u32, +} + +fn main() { + unsafe { + { + let mut u = U { s: S { a: 0, b: 1 } }; + let ra = &mut u.s.a; + let b = u.s.b; // OK + ra.use_mut(); + } + { + let mut u = U { s: S { a: 0, b: 1 } }; + let ra = &mut u.s.a; + let b = u.c; //~ ERROR cannot use `u.c` because it was mutably borrowed + ra.use_mut(); + } + } +} + +trait Fake { fn use_mut(&mut self) { } fn use_ref(&self) { } } +impl<T> Fake for T { } |