| // 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. |
| |
| #![feature(conservative_impl_trait)] |
| |
| use std::fmt::Debug; |
| |
| fn elided(x: &i32) -> impl Copy { x } |
| //~^ ERROR cannot infer an appropriate lifetime |
| |
| fn explicit<'a>(x: &'a i32) -> impl Copy { x } |
| //~^ ERROR cannot infer an appropriate lifetime |
| |
| trait LifetimeTrait<'a> {} |
| impl<'a> LifetimeTrait<'a> for &'a i32 {} |
| |
| fn with_bound<'a>(x: &'a i32) -> impl LifetimeTrait<'a> + 'static { x } |
| //~^ ERROR cannot infer an appropriate lifetime |
| |
| // Tests that a closure type contianing 'b cannot be returned from a type where |
| // only 'a was expected. |
| fn move_lifetime_into_fn<'a, 'b>(x: &'a u32, y: &'b u32) -> impl Fn(&'a u32) { |
| //~^ ERROR lifetime mismatch |
| move |_| println!("{}", y) |
| } |
| |
| fn ty_param_wont_outlive_static<T:Debug>(x: T) -> impl Debug + 'static { |
| //~^ ERROR the parameter type `T` may not live long enough |
| x |
| } |
| |
| fn main() {} |
