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// Test interaction between unboxed closure sugar and region
// parameters (should be exactly as if angle brackets were used
// and regions omitted).
#![feature(unboxed_closures)]
#![allow(dead_code)]
use std::marker;
trait Foo<'a,T> {
type Output;
fn dummy(&'a self) -> &'a (T,Self::Output);
}
trait Eq<X: ?Sized> { fn is_of_eq_type(&self, x: &X) -> bool { true } }
impl<X: ?Sized> Eq<X> for X { }
fn eq<A: ?Sized,B: ?Sized +Eq<A>>() { }
fn same_type<A,B:Eq<A>>(a: A, b: B) { }
fn test<'a,'b>() {
// Parens are equivalent to omitting default in angle.
eq::< dyn Foo<(isize,),Output=()>, dyn Foo(isize) >();
// Here we specify 'static explicitly in angle-bracket version.
// Parenthesized winds up getting inferred.
eq::< dyn Foo<'static, (isize,),Output=()>, dyn Foo(isize) >();
}
fn test2(x: &dyn Foo<(isize,),Output=()>, y: &dyn Foo(isize)) {
//~^ ERROR this trait takes 1 lifetime argument but 0 lifetime arguments were supplied
// Here, the omitted lifetimes are expanded to distinct things.
same_type(x, y)
}
fn main() { }
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