| // 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 &i32` is equivalent to `impl<'a, |
| // 'b> MyTrait<'a> for &'b i32`. |
| |
| #![allow(warnings)] |
| |
| use std::fmt::Debug; |
| |
| // Equivalent to `Box<dyn Debug + 'static>`: |
| trait StaticTrait { } |
| impl StaticTrait for Box<dyn Debug> { } |
| |
| // Equivalent to `Box<dyn Debug + 'static>`: |
| trait NotStaticTrait { } |
| impl NotStaticTrait for Box<dyn Debug + '_> { } |
| |
| fn static_val<T: StaticTrait>(_: T) { |
| } |
| |
| fn with_dyn_debug_static<'a>(x: Box<dyn Debug + 'a>) { |
| static_val(x); //~ ERROR cannot infer |
| } |
| |
| fn not_static_val<T: NotStaticTrait>(_: T) { |
| } |
| |
| fn with_dyn_debug_not_static<'a>(x: Box<dyn Debug + 'a>) { |
| not_static_val(x); // OK |
| } |
| |
| fn main() { |
| } |
