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56 lines
997 B
Rust
56 lines
997 B
Rust
fn lt<'a: 'a>() -> &'a () {
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&()
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}
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fn lt_in_fn<'a: 'a>() -> fn(&'a ()) {
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|_| ()
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}
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struct Contra<'a>(fn(&'a ()));
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fn lt_in_contra<'a: 'a>() -> Contra<'a> {
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Contra(|_| ())
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}
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fn covariance<'a, 'b, 'upper>(v: bool)
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where
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'upper: 'a,
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'upper: 'b,
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{
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let _: &'upper () = match v {
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//~^ ERROR lifetime may not live long enough
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//~| ERROR lifetime may not live long enough
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true => lt::<'a>(),
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false => lt::<'b>(),
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};
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}
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fn contra_fn<'a, 'b, 'lower>(v: bool)
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where
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'a: 'lower,
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'b: 'lower,
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{
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let _: fn(&'lower ()) = match v {
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//~^ ERROR lifetime may not live long enough
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true => lt_in_fn::<'a>(),
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false => lt_in_fn::<'b>(),
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};
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}
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fn contra_struct<'a, 'b, 'lower>(v: bool)
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where
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'a: 'lower,
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'b: 'lower,
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{
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let _: Contra<'lower> = match v {
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//~^ ERROR lifetime may not live long enough
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true => lt_in_contra::<'a>(),
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false => lt_in_contra::<'b>(),
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};
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}
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fn main() {}
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