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