add a UI test showing the current output from an impl trait type
This commit is contained in:
parent
9d71bf6d55
commit
15001ee336
2 changed files with 32 additions and 0 deletions
19
src/test/ui/impl-trait/universal-mismatched-type.rs
Normal file
19
src/test/ui/impl-trait/universal-mismatched-type.rs
Normal file
|
@ -0,0 +1,19 @@
|
|||
// 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(universal_impl_trait)]
|
||||
|
||||
use std::fmt::Debug;
|
||||
|
||||
fn foo(x: impl Debug) -> String {
|
||||
x
|
||||
}
|
||||
|
||||
fn main() { }
|
13
src/test/ui/impl-trait/universal-mismatched-type.stderr
Normal file
13
src/test/ui/impl-trait/universal-mismatched-type.stderr
Normal file
|
@ -0,0 +1,13 @@
|
|||
error[E0308]: mismatched types
|
||||
--> $DIR/universal-mismatched-type.rs:16:5
|
||||
|
|
||||
15 | fn foo(x: impl Debug) -> String {
|
||||
| ------ expected `std::string::String` because of return type
|
||||
16 | x
|
||||
| ^ expected struct `std::string::String`, found type parameter
|
||||
|
|
||||
= note: expected type `std::string::String`
|
||||
found type ``
|
||||
|
||||
error: aborting due to previous error
|
||||
|
Loading…
Reference in a new issue