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Increase accuracy of lifetime bound on trait object impl suggestion

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This commit is contained in:
Esteban Küber 2020-06-28 15:26:12 -07:00
parent 6513148c14
commit 4e08bab87d
18 changed files with 321 additions and 114 deletions
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36
src/test/ui/suggestions/impl-on-dyn-trait-with-implicit-static-bound.rs
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@ -9,10 +9,12 @@ mod foo {
trait MyTrait {
fn use_self(&self) -> &();
}
trait Irrelevant {}
impl MyTrait for dyn ObjectTrait {
fn use_self(&self) -> &() { panic!() }
}
impl Irrelevant for dyn ObjectTrait {}
fn use_it<'a>(val: &'a dyn ObjectTrait) -> impl OtherTrait<'a> + 'a {
val.use_self() //~ ERROR cannot infer an appropriate lifetime
@ -24,14 +26,48 @@ mod bar {
trait MyTrait {
fn use_self(&self) -> &();
}
trait Irrelevant {}
impl MyTrait for dyn ObjectTrait {
fn use_self(&self) -> &() { panic!() }
}
impl Irrelevant for dyn ObjectTrait {}
fn use_it<'a>(val: &'a dyn ObjectTrait) -> &'a () {
val.use_self() //~ ERROR cannot infer an appropriate lifetime
}
}
mod baz {
trait ObjectTrait {}
trait MyTrait {
fn use_self(&self) -> &();
}
trait Irrelevant {}
impl MyTrait for Box<dyn ObjectTrait> {
fn use_self(&self) -> &() { panic!() }
}
impl Irrelevant for Box<dyn ObjectTrait> {}
fn use_it<'a>(val: &'a Box<dyn ObjectTrait + 'a>) -> &'a () {
val.use_self() //~ ERROR cannot infer an appropriate lifetime
}
}
mod bat {
trait OtherTrait<'a> {}
impl<'a> OtherTrait<'a> for &'a () {}
trait ObjectTrait {}
impl dyn ObjectTrait {
fn use_self(&self) -> &() { panic!() }
}
fn use_it<'a>(val: &'a dyn ObjectTrait) -> impl OtherTrait<'a> + 'a {
val.use_self() //~ ERROR cannot infer an appropriate lifetime
}
}
fn main() {}