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// Copyright 2017 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.
fn prove_static<T: 'static + ?Sized>(_: &'static T) {}
fn lifetime_transmute_slice<'a, T: ?Sized>(x: &'a T, y: &T) -> &'a T {
let mut out = [x];
//~^ ERROR cannot infer an appropriate lifetime due to conflicting requirements
{
let slice: &mut [_] = &mut out;
slice[0] = y;
}
out[0]
}
struct Struct<T, U: ?Sized> {
head: T,
_tail: U
}
fn lifetime_transmute_struct<'a, T: ?Sized>(x: &'a T, y: &T) -> &'a T {
let mut out = Struct { head: x, _tail: [()] };
//~^ ERROR cannot infer an appropriate lifetime due to conflicting requirements
{
let dst: &mut Struct<_, [()]> = &mut out;
dst.head = y;
}
out.head
}
fn main() {
prove_static(lifetime_transmute_slice("", &String::from("foo")));
prove_static(lifetime_transmute_struct("", &String::from("bar")));
}
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