mirror of
https://github.com/rust-lang/rust.git
synced 2025-10-30 20:44:34 +00:00
65 lines
2.1 KiB
Rust
65 lines
2.1 KiB
Rust
// Test the interaction between rested RPIT and HRTB.
|
|
|
|
trait Foo<'a> {
|
|
type Assoc;
|
|
}
|
|
|
|
impl Foo<'_> for () {
|
|
type Assoc = ();
|
|
}
|
|
|
|
// Alternative version of `Foo` whose impl uses `'a`.
|
|
trait Bar<'a> {
|
|
type Assoc;
|
|
}
|
|
|
|
impl<'a> Bar<'a> for () {
|
|
type Assoc = &'a ();
|
|
}
|
|
|
|
trait Qux<'a> {}
|
|
|
|
impl Qux<'_> for () {}
|
|
|
|
// This is not supported.
|
|
fn one_hrtb_outlives() -> impl for<'a> Foo<'a, Assoc = impl Sized + 'a> {}
|
|
//~^ ERROR higher kinded lifetime bounds on nested opaque types are not supported yet
|
|
|
|
// This is not supported.
|
|
fn one_hrtb_trait_param() -> impl for<'a> Foo<'a, Assoc = impl Qux<'a>> {}
|
|
//~^ ERROR higher kinded lifetime bounds on nested opaque types are not supported yet
|
|
|
|
fn one_hrtb_outlives_uses() -> impl for<'a> Bar<'a, Assoc = impl Sized + 'a> {}
|
|
//~^ ERROR higher kinded lifetime bounds on nested opaque types are not supported yet
|
|
|
|
fn one_hrtb_trait_param_uses() -> impl for<'a> Bar<'a, Assoc = impl Qux<'a>> {}
|
|
//~^ ERROR higher kinded lifetime bounds on nested opaque types are not supported yet
|
|
|
|
// This should resolve.
|
|
fn one_hrtb_mention_fn_trait_param<'b>() -> impl for<'a> Foo<'a, Assoc = impl Qux<'b>> {}
|
|
|
|
// This should resolve.
|
|
fn one_hrtb_mention_fn_outlives<'b>() -> impl for<'a> Foo<'a, Assoc = impl Sized + 'b> {}
|
|
|
|
// This should resolve.
|
|
fn one_hrtb_mention_fn_trait_param_uses<'b>() -> impl for<'a> Bar<'a, Assoc = impl Qux<'b>> {}
|
|
|
|
// This should resolve.
|
|
fn one_hrtb_mention_fn_outlives_uses<'b>() -> impl for<'a> Bar<'a, Assoc = impl Sized + 'b> {}
|
|
|
|
// This should resolve.
|
|
fn two_htrb_trait_param() -> impl for<'a> Foo<'a, Assoc = impl for<'b> Qux<'b>> {}
|
|
|
|
// `'b` is not in scope for the outlives bound.
|
|
fn two_htrb_outlives() -> impl for<'a> Foo<'a, Assoc = impl for<'b> Sized + 'b> {}
|
|
//~^ ERROR use of undeclared lifetime name `'b` [E0261]
|
|
|
|
// This should resolve.
|
|
fn two_htrb_trait_param_uses() -> impl for<'a> Bar<'a, Assoc = impl for<'b> Qux<'b>> {}
|
|
|
|
// `'b` is not in scope for the outlives bound.
|
|
fn two_htrb_outlives_uses() -> impl for<'a> Bar<'a, Assoc = impl for<'b> Sized + 'b> {}
|
|
//~^ ERROR use of undeclared lifetime name `'b` [E0261]
|
|
|
|
fn main() {}
|