rust/tests/ui/async-await/multiple-lifetimes/variance.rs
2023-01-11 09:32:08 +00:00

16 lines
419 B
Rust

// edition:2018
// run-pass
// Test for async fn where the parameters have distinct lifetime
// parameters that appear in all possible variances.
async fn lotsa_lifetimes<'a, 'b, 'c>(_: fn(&'a u8), _: fn(&'b u8) -> &'b u8, _: fn() -> &'c u8) { }
fn take_any(_: &u8) { }
fn identify(x: &u8) -> &u8 { x }
fn give_back() -> &'static u8 { &22 }
fn main() {
let _ = lotsa_lifetimes(take_any, identify, give_back);
}