5cf126ae2f
This is a deprecated attribute that is slated for removal, and it also affects all implementors of the trait. This commit removes the attribute and fixes up implementors accordingly. The primary implementation which was lost was the ability to compare `&[T]` and `Vec<T>` (in that order). This change also modifies the `assert_eq!` macro to not consider both directions of equality, only the one given in the left/right forms to the macro. This modification is motivated due to the fact that `&[T] == Vec<T>` no longer compiles, causing hundreds of errors in unit tests in the standard library (and likely throughout the community as well). cc #19470 [breaking-change]
47 lines
1.6 KiB
Rust
47 lines
1.6 KiB
Rust
// Copyright 2015 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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// Utility macros for implementing PartialEq on slice-like types
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#![doc(hidden)]
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#[macro_export]
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macro_rules! __impl_slice_eq1 {
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($Lhs: ty, $Rhs: ty) => {
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__impl_slice_eq1! { $Lhs, $Rhs, Sized }
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};
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($Lhs: ty, $Rhs: ty, $Bound: ident) => {
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#[stable(feature = "rust1", since = "1.0.0")]
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impl<'a, 'b, A: $Bound, B> PartialEq<$Rhs> for $Lhs where A: PartialEq<B> {
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#[inline]
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fn eq(&self, other: &$Rhs) -> bool { &self[..] == &other[..] }
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#[inline]
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fn ne(&self, other: &$Rhs) -> bool { &self[..] != &other[..] }
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}
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}
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}
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#[macro_export]
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macro_rules! __impl_slice_eq2 {
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($Lhs: ty, $Rhs: ty) => {
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__impl_slice_eq2! { $Lhs, $Rhs, Sized }
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};
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($Lhs: ty, $Rhs: ty, $Bound: ident) => {
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__impl_slice_eq1!($Lhs, $Rhs, $Bound);
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#[stable(feature = "rust1", since = "1.0.0")]
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impl<'a, 'b, A: $Bound, B> PartialEq<$Lhs> for $Rhs where B: PartialEq<A> {
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#[inline]
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fn eq(&self, other: &$Lhs) -> bool { &self[..] == &other[..] }
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#[inline]
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fn ne(&self, other: &$Lhs) -> bool { &self[..] != &other[..] }
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}
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}
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}
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