mirror of
https://github.com/rust-lang/rust.git
synced 2025-10-02 18:27:37 +00:00
34 lines
1.3 KiB
Rust
34 lines
1.3 KiB
Rust
// FIXME(more_maybe_bounds): Even under `more_maybe_bounds` / `-Zexperimental-default-bounds`,
|
|
// trying to relax non-default bounds should still be an error in all contexts! As you can see
|
|
// there are places like supertrait bounds, trait object types or associated type bounds (ATB)
|
|
// where we currently don't perform this check.
|
|
#![feature(auto_traits, more_maybe_bounds, negative_impls)]
|
|
|
|
trait Trait1 {}
|
|
auto trait Trait2 {}
|
|
|
|
// FIXME: `?Trait1` should be rejected, `Trait1` isn't marked `#[lang = "default_traitN"]`.
|
|
trait Trait3: ?Trait1 {}
|
|
trait Trait4 where Self: Trait1 {}
|
|
|
|
// FIXME: `?Trait2` should be rejected, `Trait2` isn't marked `#[lang = "default_traitN"]`.
|
|
fn foo(_: Box<(dyn Trait3 + ?Trait2)>) {}
|
|
|
|
fn bar<T: ?Sized + ?Trait2 + ?Trait1 + ?Trait4>(_: &T) {}
|
|
//~^ ERROR bound modifier `?` can only be applied to default traits like `Sized`
|
|
//~| ERROR bound modifier `?` can only be applied to default traits like `Sized`
|
|
//~| ERROR bound modifier `?` can only be applied to default traits like `Sized`
|
|
|
|
// FIXME: `?Trait1` should be rejected, `Trait1` isn't marked `#[lang = "default_traitN"]`.
|
|
fn baz<T>() where T: Iterator<Item: ?Trait1> {}
|
|
|
|
struct S;
|
|
impl !Trait2 for S {}
|
|
impl Trait1 for S {}
|
|
impl Trait3 for S {}
|
|
|
|
fn main() {
|
|
foo(Box::new(S));
|
|
bar(&S);
|
|
}
|