rust/tests/ui/unboxed-closures/unboxed-closure-sugar-lifetime-elision.rs
2023-01-11 09:32:08 +00:00

28 lines
849 B
Rust

// Test that the unboxed closure sugar can be used with an arbitrary
// struct type and that it is equivalent to the same syntax using
// angle brackets. This test covers only simple types and in
// particular doesn't test bound regions.
#![feature(unboxed_closures)]
#![allow(dead_code)]
use std::marker;
trait Foo<T> {
type Output;
fn dummy(&self, t: T);
}
trait Eq<X: ?Sized> { }
impl<X: ?Sized> Eq<X> for X { }
fn eq<A: ?Sized,B: ?Sized +Eq<A>>() { }
fn main() {
eq::< dyn for<'a> Foo<(&'a isize,), Output=&'a isize>,
dyn Foo(&isize) -> &isize >();
eq::< dyn for<'a> Foo<(&'a isize,), Output=(&'a isize, &'a isize)>,
dyn Foo(&isize) -> (&isize, &isize) >();
let _: dyn Foo(&isize, &usize) -> &usize; //~ ERROR missing lifetime specifier
}