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 :(.)
53 lines
1.2 KiB
Rust
53 lines
1.2 KiB
Rust
// Copyright 2012-2013 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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//! Functions for the unit type.
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#[cfg(not(test))]
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use default::Default;
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#[cfg(not(test))]
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use cmp::{Eq, Equal, Ord, Ordering, TotalEq, TotalOrd};
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use fmt;
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#[cfg(not(test))]
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impl Eq for () {
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#[inline]
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fn eq(&self, _other: &()) -> bool { true }
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#[inline]
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fn ne(&self, _other: &()) -> bool { false }
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}
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#[cfg(not(test))]
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impl Ord for () {
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#[inline]
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fn lt(&self, _other: &()) -> bool { false }
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}
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#[cfg(not(test))]
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impl TotalOrd for () {
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#[inline]
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fn cmp(&self, _other: &()) -> Ordering { Equal }
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}
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#[cfg(not(test))]
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impl TotalEq for () {}
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#[cfg(not(test))]
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impl Default for () {
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#[inline]
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fn default() -> () { () }
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}
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impl fmt::Show for () {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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f.pad("()")
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}
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}
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