36f20423c3
It will be simpler to implement only one method for Ord, while we also allow implementing all four Ord methods for semantics or performance reasons. We only supply three default methods (and not four), because don't have any nice error reporting for the case where at least one method must be implemented, but it's arbitrary which.
17 lines
675 B
Rust
17 lines
675 B
Rust
// Copyright 2012 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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struct thing(uint);
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impl Ord for thing { //~ ERROR missing method `lt`
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fn le(&self, other: &thing) -> bool { **self < **other }
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fn ge(&self, other: &thing) -> bool { **self < **other }
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}
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fn main() {}
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