src/libcore/cmp_macros.rs

   1 // Copyright 2015 The Rust Project Developers. See the COPYRIGHT
   2 // file at the top-level directory of this distribution and at
   3 // http://rust-lang.org/COPYRIGHT.
   4 //
   5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
   6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
   7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
   8 // option. This file may not be copied, modified, or distributed
   9 // except according to those terms.
  10
  11 // Utility macros for implementing PartialEq on slice-like types
  12
  13 #![doc(hidden)]
  14
  15 #[macro_export]
  16 macro_rules! __impl_slice_eq1 {
  17     ($Lhs: ty, $Rhs: ty) => {
  18         __impl_slice_eq1! { $Lhs, $Rhs, Sized }
  19     };
  20     ($Lhs: ty, $Rhs: ty, $Bound: ident) => {
  21         #[stable(feature = "rust1", since = "1.0.0")]
  22         impl<'a, 'b, A: $Bound, B> PartialEq<$Rhs> for $Lhs where A: PartialEq<B> {
  23             #[inline]
  24             fn eq(&self, other: &$Rhs) -> bool { self[..] == other[..] }
  25             #[inline]
  26             fn ne(&self, other: &$Rhs) -> bool { self[..] != other[..] }
  27         }
  28     }
  29 }
  30
  31 #[macro_export]
  32 macro_rules! __impl_slice_eq2 {
  33     ($Lhs: ty, $Rhs: ty) => {
  34         __impl_slice_eq2! { $Lhs, $Rhs, Sized }
  35     };
  36     ($Lhs: ty, $Rhs: ty, $Bound: ident) => {
  37         __impl_slice_eq1!($Lhs, $Rhs, $Bound);
  38
  39         #[stable(feature = "rust1", since = "1.0.0")]
  40         impl<'a, 'b, A: $Bound, B> PartialEq<$Lhs> for $Rhs where B: PartialEq<A> {
  41             #[inline]
  42             fn eq(&self, other: &$Lhs) -> bool { self[..] == other[..] }
  43             #[inline]
  44             fn ne(&self, other: &$Lhs) -> bool { self[..] != other[..] }
  45         }
  46     }
  47 }