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// Various examples of structs whose fields are not well-formed.
#![allow(dead_code)]
trait Dummy<'a> {
type Out;
}
impl<'a, T> Dummy<'a> for T
where
T: 'a,
{
type Out = ();
}
type RequireOutlives<'a, T> = <T as Dummy<'a>>::Out;
enum Ref1<'a, T> {
Ref1Variant1(RequireOutlives<'a, T>), //~ ERROR the parameter type `T` may not live long enough
}
enum Ref2<'a, T> {
Ref2Variant1,
Ref2Variant2(isize, RequireOutlives<'a, T>), //~ ERROR the parameter type `T` may not live long enough
}
enum RefOk<'a, T: 'a> {
RefOkVariant1(&'a T),
}
// This is now well formed. RFC 2093
enum RefIndirect<'a, T> {
RefIndirectVariant1(isize, RefOk<'a, T>),
}
enum RefDouble<'a, 'b, T> {
RefDoubleVariant1(&'a RequireOutlives<'b, T>),
//~^ the parameter type `T` may not live long enough [E0309]
}
fn main() {}
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