// build-pass (FIXME(62277): could be check-pass?) #![allow(unused)] #![deny(explicit_outlives_requirements)] // A case where we can't infer the outlives requirement. Example copied from // RFC 2093. // (https://rust-lang.github.io/rfcs/2093-infer-outlives.html // #where-explicit-annotations-would-still-be-required) trait MakeRef<'a> { type Type; } impl<'a, T> MakeRef<'a> for Vec<T> where T: 'a // still required { type Type = &'a T; } struct Foo<'a, T> where T: 'a // still required, not inferred from `field` { field: <Vec<T> as MakeRef<'a>>::Type } fn main() {}