| // Copyright 2015 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. |
| |
| // Issue #24644 - block causes a &Trait -> &Trait coercion: |
| trait Trait {} |
| |
| struct Bar; |
| impl Trait for Bar {} |
| |
| fn main() { |
| let x: &[&Trait] = &[{ &Bar }]; |
| } |
| |
| // Issue #25748 - the cast causes an &Encoding -> &Encoding coercion: |
| pub struct UTF8Encoding; |
| pub const UTF_8: &'static UTF8Encoding = &UTF8Encoding; |
| pub trait Encoding {} |
| impl Encoding for UTF8Encoding {} |
| pub fn f() -> &'static Encoding { UTF_8 as &'static Encoding } |
| |
| // Root of the problem: &Trait -> &Trait coercions: |
| const FOO: &'static Trait = &Bar; |
| const BAR: &'static Trait = FOO; |
| fn foo() { let _x = BAR; } |
