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#![feature(negative_impls)]
#![allow(order_dependent_trait_objects)]
// Check that the issue #33140 hack does not allow unintended things.
// OK
trait Trait0 {}
impl Trait0 for dyn Send {}
impl Trait0 for dyn Send {}
// Problem 1: associated types
trait Trait1 {
fn my_fn(&self) {}
}
impl Trait1 for dyn Send {}
impl Trait1 for dyn Send {}
//~^ ERROR E0119
// Problem 2: negative impl
trait Trait2 {}
impl Trait2 for dyn Send {}
impl !Trait2 for dyn Send {}
//~^ ERROR E0751
// Problem 3: type parameter
trait Trait3<T: ?Sized> {}
impl Trait3<dyn Sync> for dyn Send {}
impl Trait3<dyn Sync> for dyn Send {}
//~^ ERROR E0119
// Problem 4a: not a trait object - generic
trait Trait4a {}
impl<T: ?Sized> Trait4a for T {}
impl Trait4a for dyn Send {}
//~^ ERROR E0119
// Problem 4b: not a trait object - misc
trait Trait4b {}
impl Trait4b for () {}
impl Trait4b for () {}
//~^ ERROR E0119
// Problem 4c: not a principal-less trait object
trait Trait4c {}
impl Trait4c for dyn Trait1 + Send {}
impl Trait4c for dyn Trait1 + Send {}
//~^ ERROR E0119
// Problem 4d: lifetimes
trait Trait4d {}
impl<'a> Trait4d for dyn Send + 'a {}
impl<'a> Trait4d for dyn Send + 'a {}
//~^ ERROR E0119
// Problem 5: where-clauses
trait Trait5 {}
impl Trait5 for dyn Send {}
impl Trait5 for dyn Send where u32: Copy {}
//~^ ERROR E0119
fn main() {}
|
