mirror of
https://github.com/rust-lang/rust.git
synced 2024-11-01 06:51:58 +00:00
69 lines
2.4 KiB
Rust
69 lines
2.4 KiB
Rust
// edition:2021
|
|
// gate-test-anonymous_lifetime_in_impl_trait
|
|
// Verify the behaviour of `feature(anonymous_lifetime_in_impl_trait)`.
|
|
|
|
mod elided {
|
|
fn f(_: impl Iterator<Item = &()>) {}
|
|
//~^ ERROR anonymous lifetimes in `impl Trait` are unstable
|
|
|
|
fn g(mut x: impl Iterator<Item = &()>) -> Option<&()> { x.next() }
|
|
//~^ ERROR anonymous lifetimes in `impl Trait` are unstable
|
|
//~| ERROR missing lifetime specifier
|
|
|
|
// Anonymous lifetimes in async fn are already allowed.
|
|
// This is understood as `fn foo<'_1>(_: impl Iterator<Item = &'_1 ()>) {}`.
|
|
async fn h(_: impl Iterator<Item = &()>) {}
|
|
|
|
// Anonymous lifetimes in async fn are already allowed.
|
|
// But that lifetime does not participate in resolution.
|
|
async fn i(mut x: impl Iterator<Item = &()>) -> Option<&()> { x.next() }
|
|
//~^ ERROR missing lifetime specifier
|
|
}
|
|
|
|
mod underscore {
|
|
fn f(_: impl Iterator<Item = &'_ ()>) {}
|
|
//~^ ERROR anonymous lifetimes in `impl Trait` are unstable
|
|
|
|
fn g(mut x: impl Iterator<Item = &'_ ()>) -> Option<&'_ ()> { x.next() }
|
|
//~^ ERROR anonymous lifetimes in `impl Trait` are unstable
|
|
//~| ERROR missing lifetime specifier
|
|
|
|
// Anonymous lifetimes in async fn are already allowed.
|
|
// This is understood as `fn foo<'_1>(_: impl Iterator<Item = &'_1 ()>) {}`.
|
|
async fn h(_: impl Iterator<Item = &'_ ()>) {}
|
|
|
|
// Anonymous lifetimes in async fn are already allowed.
|
|
// But that lifetime does not participate in resolution.
|
|
async fn i(mut x: impl Iterator<Item = &'_ ()>) -> Option<&'_ ()> { x.next() }
|
|
//~^ ERROR missing lifetime specifier
|
|
}
|
|
|
|
mod alone_in_path {
|
|
trait Foo<'a> { fn next(&mut self) -> Option<&'a ()>; }
|
|
|
|
fn f(_: impl Foo) {}
|
|
//~^ ERROR anonymous lifetimes in `impl Trait` are unstable
|
|
|
|
fn g(mut x: impl Foo) -> Option<&()> { x.next() }
|
|
//~^ ERROR anonymous lifetimes in `impl Trait` are unstable
|
|
//~| ERROR missing lifetime specifier
|
|
}
|
|
|
|
mod in_path {
|
|
trait Foo<'a, T> { fn next(&mut self) -> Option<&'a T>; }
|
|
|
|
fn f(_: impl Foo<()>) {}
|
|
//~^ ERROR anonymous lifetimes in `impl Trait` are unstable
|
|
|
|
fn g(mut x: impl Foo<()>) -> Option<&()> { x.next() }
|
|
//~^ ERROR anonymous lifetimes in `impl Trait` are unstable
|
|
//~| ERROR missing lifetime specifier
|
|
}
|
|
|
|
// This must not err, as the `&` actually resolves to `'a`.
|
|
fn resolved_anonymous<'a, T>(f: impl Fn(&'a str) -> &T) {
|
|
f("f")
|
|
}
|
|
|
|
fn main() {}
|