36 lines
1006 B
Rust
36 lines
1006 B
Rust
// Copyright 2017 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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// ignore-cloudabi no std::fs support
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#![feature(try_trait)]
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use std::ops::Try;
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fn main() {
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// error for a `Try` type on a non-`Try` fn
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std::fs::File::open("foo")?; //~ ERROR the `?` operator can only
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// a non-`Try` type on a non-`Try` fn
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()?; //~ ERROR the `?` operator can only
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// an unrelated use of `Try`
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try_trait_generic::<()>(); //~ ERROR the trait bound
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}
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fn try_trait_generic<T: Try>() -> T {
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// and a non-`Try` object on a `Try` fn.
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()?; //~ ERROR the `?` operator can only
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loop {}
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}
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