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// Copyright 2018 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
// Test that `impl MyTrait for Foo<'_>` works.
// run-pass
#![allow(warnings)]
#![feature(impl_header_lifetime_elision)]
trait MyTrait { }
struct Foo<'a> { x: &'a u32 }
impl MyTrait for Foo<'_> {
}
fn impls_my_trait<T: MyTrait>() { }
fn impls_my_trait_val<T: MyTrait>(_: T) {
impls_my_trait::<T>();
}
fn random_where_clause()
where for<'a> Foo<'a>: MyTrait { }
fn main() {
let x = 22;
let f = Foo { x: &x };
// This type is `Foo<'x>` for a local lifetime `'x`; so the impl
// must apply to any lifetime to apply to this.
impls_my_trait_val(f);
impls_my_trait::<Foo<'static>>();
random_where_clause();
}
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