rust/tests/ui/async-await/unused-lifetime.rs
2023-01-11 09:32:08 +00:00

40 lines
1.1 KiB
Rust

// Check "unused_lifetimes" lint on both async and sync functions
// Both cases should be diagnosed the same way.
// edition:2018
#![deny(unused_lifetimes)]
async fn async_wrong_without_args<'a>() {} //~ ERROR lifetime parameter `'a` never used
async fn async_wrong_1_lifetime<'a>(_: &i32) {} //~ ERROR lifetime parameter `'a` never used
async fn async_wrong_2_lifetimes<'a, 'b>(_: &'a i32, _: &i32) {} //~ ERROR lifetime parameter `'b` never used
async fn async_right_1_lifetime<'a>(_: &'a i32) {}
async fn async_right_2_lifetimes<'a, 'b>(_: &'a i32, _: &'b i32) {}
async fn async_right_trait_bound_lifetime<'a, I>(_: I)
where
I: Iterator<Item = &'a i32>
{}
fn wrong_without_args<'a>() {} //~ ERROR lifetime parameter `'a` never used
fn wrong_1_lifetime<'a>(_: &i32) {} //~ ERROR lifetime parameter `'a` never used
fn wrong_2_lifetimes<'a, 'b>(_: &'a i32, _: &i32) {} //~ ERROR lifetime parameter `'b` never used
fn right_1_lifetime<'a>(_: &'a i32) {}
fn right_2_lifetimes<'a, 'b>(_: &'a i32, _: &'b i32) {}
fn right_trait_bound_lifetime<'a, I>(_: I)
where
I: Iterator<Item = &'a i32>
{}
fn main() {}