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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/phantom-auto-trait.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/phantom-auto-trait.rs')
-rw-r--r-- | src/test/ui/phantom-auto-trait.rs | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/src/test/ui/phantom-auto-trait.rs b/src/test/ui/phantom-auto-trait.rs new file mode 100644 index 000000000..0172ca335 --- /dev/null +++ b/src/test/ui/phantom-auto-trait.rs @@ -0,0 +1,30 @@ +// Ensure that auto trait checks `T` when it encounters a `PhantomData<T>` field, instead of +// checking the `PhantomData<T>` type itself (which almost always implements an auto trait). + +#![feature(auto_traits)] + +use std::marker::{PhantomData}; + +unsafe auto trait Zen {} + +unsafe impl<'a, T: 'a> Zen for &'a T where T: Sync {} + +struct Guard<'a, T: 'a> { + _marker: PhantomData<&'a T>, +} + +struct Nested<T>(T); + +fn is_zen<T: Zen>(_: T) {} + +fn not_sync<T>(x: Guard<T>) { + is_zen(x) + //~^ ERROR `T` cannot be shared between threads safely [E0277] +} + +fn nested_not_sync<T>(x: Nested<Guard<T>>) { + is_zen(x) + //~^ ERROR `T` cannot be shared between threads safely [E0277] +} + +fn main() {} |