src/test/ui/maybe-bounds-where.rs

// 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.

struct S1<T>(T) where (T): ?Sized;
//~^ ERROR `?Trait` bounds are only permitted at the point where a type parameter is declared

struct S2<T>(T) where u8: ?Sized;
//~^ ERROR `?Trait` bounds are only permitted at the point where a type parameter is declared

struct S3<T>(T) where &'static T: ?Sized;
//~^ ERROR `?Trait` bounds are only permitted at the point where a type parameter is declared

trait Trait<'a> {}

struct S4<T>(T) where for<'a> T: ?Trait<'a>;
//~^ ERROR `?Trait` bounds are only permitted at the point where a type parameter is declared

struct S5<T>(*const T) where T: ?Trait<'static> + ?Sized;
//~^ ERROR type parameter has more than one relaxed default bound
//~| WARN default bound relaxed for a type parameter

impl<T> S1<T> {
    fn f() where T: ?Sized {}
    //~^ ERROR `?Trait` bounds are only permitted at the point where a type parameter is declared
}

fn main() {
    let u = vec![1, 2, 3];
    let _s: S5<[u8]> = S5(&u[..]); // OK
}