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some tests featuring multiple bounds, other errors

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Niko Matsakis 2017-11-13 14:27:58 -05:00 committed by Christopher Vittal
parent 15001ee336
commit 2786ea662d
2 changed files with 49 additions and 0 deletions
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23
src/test/run-pass/impl-trait/universal_multiple_bounds.rs Normal file
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// 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::Display;
fn foo(f: impl Display + Clone) -> String {
let g = f.clone();
format!("{} + {}", f, g)
}
fn main() {
let sum = foo(format!("22"));
assert_eq!(sum, r"22 + 22");
}

26
src/test/ui/impl-trait/universal_wrong_bounds.rs Normal file
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// 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::Display;
fn foo(f: impl Display + Clone) -> String {
wants_debug(f);
wants_display(f);
wants_clone(f);
}
fn wants_debug(g: impl Debug) { }
fn wants_display(g: impl Debug) { }
fn wants_cone(g: impl Clone) { }
fn main() {
}