mirror of https://github.com/rust-lang/rust
30 lines
613 B
Rust
30 lines
613 B
Rust
use std::mem;
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trait Trait1<T> {}
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trait Trait2<'a> {
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type Ty;
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}
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fn _ice(param: Box<dyn for <'a> Trait1<<() as Trait2<'a>>::Ty>>) {
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//~^ ERROR the trait bound `for<'a> (): Trait2<'a>` is not satisfied
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//~| ERROR the trait bound `for<'a> (): Trait2<'a>` is not satisfied
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let _e: (usize, usize) = unsafe{mem::transmute(param)};
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}
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trait Lifetime<'a> {
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type Out;
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}
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impl<'a> Lifetime<'a> for () {
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type Out = &'a ();
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}
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fn foo<'a>(x: &'a ()) -> <() as Lifetime<'a>>::Out {
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x
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}
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fn takes_lifetime(_f: for<'a> fn(&'a ()) -> <() as Lifetime<'a>>::Out) {
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}
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fn main() {
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takes_lifetime(foo);
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}
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