1 // Copyright 2017 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
11 // ignore-cloudabi no std::fs support
13 #![feature(try_trait)]
18 // error for a `Try` type on a non-`Try` fn
19 std::fs::File::open("foo")?; //~ ERROR the `?` operator can only
21 // a non-`Try` type on a non-`Try` fn
22 ()?; //~ ERROR the `?` operator can only
24 // an unrelated use of `Try`
25 try_trait_generic::<()>(); //~ ERROR the trait bound
30 fn try_trait_generic<T: Try>() -> T {
31 // and a non-`Try` object on a `Try` fn.
32 ()?; //~ ERROR the `?` operator can only