f6db0ef946
`TotalEq` is now just an assertion about the `Eq` impl of a type (i.e. `==` is a total equality if a type implements `TotalEq`) so the extra method is just confusing. Also, a new method magically appeared as a hack to allow deriving to assert that the contents of a struct/enum are also TotalEq, because the deriving infrastructure makes it very hard to do anything but create a trait method. (You didn't hear about this horrible work-around from me :(.)
28 lines
831 B
Rust
28 lines
831 B
Rust
// Copyright 2013-2014 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-test FIXME #11820: & is unreliable in deriving
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use std::cmp::{Less,Equal,Greater};
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#[deriving(TotalEq,TotalOrd)]
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struct A<'a> {
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x: &'a int
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}
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pub fn main() {
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let (a, b) = (A { x: &1 }, A { x: &2 });
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assert_eq!(a.cmp(&a), Equal);
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assert_eq!(b.cmp(&b), Equal);
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assert_eq!(a.cmp(&b), Less);
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assert_eq!(b.cmp(&a), Greater);
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}
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