mirror of
https://github.com/rust-lang/rust.git
synced 2024-11-28 09:44:08 +00:00
ac919d527c
When trying to perform static dispatch on something which derefs to a trait object, and the target trait is not in scope, we had confusing error messages if the target method had a `Self: Sized` bound. We add a more precise error message in this case: "consider using trait ...". Fixes #35976.
34 lines
1.0 KiB
Rust
34 lines
1.0 KiB
Rust
// Copyright 2016 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.
|
|
|
|
mod private {
|
|
pub trait Future {
|
|
fn wait(&self) where Self: Sized;
|
|
}
|
|
|
|
impl Future for Box<Future> {
|
|
fn wait(&self) { }
|
|
}
|
|
}
|
|
|
|
//use private::Future;
|
|
|
|
fn bar(arg: Box<private::Future>) {
|
|
arg.wait();
|
|
//~^ ERROR no method named `wait` found for type `std::boxed::Box<private::Future + 'static>`
|
|
//~| the following trait is implemented but not in scope
|
|
//~| ERROR the trait bound `private::Future + 'static: std::marker::Sized` is not satisfied
|
|
//~| `private::Future + 'static` does not have a constant size known at compile-time
|
|
}
|
|
|
|
fn main() {
|
|
|
|
}
|