diff options
Diffstat (limited to 'src/test/ui/typeck/typeck-default-trait-impl-negation-sync.rs')
-rw-r--r-- | src/test/ui/typeck/typeck-default-trait-impl-negation-sync.rs | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/src/test/ui/typeck/typeck-default-trait-impl-negation-sync.rs b/src/test/ui/typeck/typeck-default-trait-impl-negation-sync.rs new file mode 100644 index 000000000..b9042188a --- /dev/null +++ b/src/test/ui/typeck/typeck-default-trait-impl-negation-sync.rs @@ -0,0 +1,41 @@ +#![feature(negative_impls)] + +struct Managed; +impl !Send for Managed {} +impl !Sync for Managed {} + +use std::cell::UnsafeCell; + +struct MySync { + t: *mut u8 +} + +unsafe impl Sync for MySync {} + +struct MyNotSync { + t: *mut u8 +} + +impl !Sync for MyNotSync {} + +struct MyTypeWUnsafe { + t: UnsafeCell<u8> +} + +struct MyTypeManaged { + t: Managed +} + +fn is_sync<T: Sync>() {} + +fn main() { + is_sync::<MySync>(); + is_sync::<MyNotSync>(); + //~^ ERROR `MyNotSync` cannot be shared between threads safely [E0277] + + is_sync::<MyTypeWUnsafe>(); + //~^ ERROR `UnsafeCell<u8>` cannot be shared between threads safely [E0277] + + is_sync::<MyTypeManaged>(); + //~^ ERROR `Managed` cannot be shared between threads safely [E0277] +} |