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// run-pass
#![allow(unused_variables)]
// Issue #12856: a lifetime formal binding introduced by a generic fn
// should not upset the variance inference for actual occurrences of
// that lifetime in type expressions.
pub trait HasLife<'a> {
fn dummy(&'a self) { } // just to induce a variance on 'a
}
trait UseLife01 {
fn refs<'a, H: HasLife<'a>>(&'a self) -> H;
}
trait UseLife02 {
fn refs<'a, T: 'a, H: HasType<&'a T>>(&'a self) -> H;
}
pub trait HasType<T>
{
fn dummy(&self, t: T) -> T { panic!() }
}
trait UseLife03<T> {
fn refs<'a, H: HasType<&'a T>>(&'a self) -> H where T: 'a;
}
// (The functions below were not actually a problem observed during
// fixing of #12856; they just seem like natural tests to put in to
// cover a couple more points in the testing space)
pub fn top_refs_1<'a, H: HasLife<'a>>(_s: &'a ()) -> H {
unimplemented!()
}
pub fn top_refs_2<'a, T: 'a, H: HasType<&'a T>>(_s: &'a ()) -> H {
unimplemented!()
}
pub fn main() {}
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