mirror of https://github.com/rust-lang/rust
30 lines
717 B
Rust
30 lines
717 B
Rust
//@ run-pass
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#![warn(redundant_lifetimes)]
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fn invariant_id<'a,'b>(t: &'b mut &'static ()) -> &'b mut &'a ()
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//~^ WARN unnecessary lifetime parameter `'a`
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where 'a: 'static { t }
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fn static_id<'a>(t: &'a ()) -> &'static ()
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//~^ WARN unnecessary lifetime parameter `'a`
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where 'a: 'static { t }
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fn static_id_indirect<'a,'b>(t: &'a ()) -> &'static ()
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//~^ WARN unnecessary lifetime parameter `'a`
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//~| WARN unnecessary lifetime parameter `'b`
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where 'a: 'b, 'b: 'static { t }
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fn ref_id<'a>(t: &'a ()) -> &'a () where 'static: 'a { t }
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static UNIT: () = ();
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fn main()
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{
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let mut val : &'static () = &UNIT;
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invariant_id(&mut val);
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static_id(val);
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static_id_indirect(val);
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ref_id(val);
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}
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