src/test/ui/rfc-2093-infer-outlives/regions-enum-not-wf.rs

// ignore-tidy-linelength

// 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> { //~ ERROR the parameter type `T` may not live long enough [E0309]
    RefDoubleVariant1(&'a RequireOutlives<'b, T>)
        //~^ the parameter type `T` may not live long enough [E0309]
}

fn main() { }