29 lines
855 B
Rust
29 lines
855 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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#![feature(rustc_attrs, associated_type_defaults)]
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#![allow(warnings)]
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trait State: Sized {
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type NextState: State = StateMachineEnded;
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fn execute(self) -> Option<Self::NextState>;
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}
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struct StateMachineEnded;
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impl State for StateMachineEnded {
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fn execute(self) -> Option<Self::NextState> {
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None
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}
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}
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#[rustc_error]
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fn main() { //~ ERROR compilation successful
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}
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