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// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
//! Implementations of things like `Eq` for fixed-length arrays
//! up to a certain length. Eventually we should able to generalize
//! to all lengths.
#![experimental] // not yet reviewed
use clone::Clone;
use cmp::{PartialEq, Eq, PartialOrd, Ord, Ordering};
use fmt;
use marker::Copy;
use ops::{Deref, FullRange, Index};
use option::Option;
// macro for implementing n-ary tuple functions and operations
macro_rules! array_impls {
($($N:expr)+) => {
$(
#[stable]
impl<T:Copy> Clone for [T; $N] {
fn clone(&self) -> [T; $N] {
*self
}
}
#[unstable = "waiting for Show to stabilize"]
impl<T:fmt::Show> fmt::Show for [T; $N] {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
fmt::Show::fmt(&self.index(&FullRange), f)
}
}
#[stable]
impl<A, B> PartialEq<[B; $N]> for [A; $N] where A: PartialEq<B> {
#[inline]
fn eq(&self, other: &[B; $N]) -> bool {
self.index(&FullRange) == other.index(&FullRange)
}
#[inline]
fn ne(&self, other: &[B; $N]) -> bool {
self.index(&FullRange) != other.index(&FullRange)
}
}
#[stable]
impl<'a, A, B, Rhs> PartialEq<Rhs> for [A; $N] where
A: PartialEq<B>,
Rhs: Deref<Target=[B]>,
{
#[inline(always)]
fn eq(&self, other: &Rhs) -> bool {
PartialEq::eq(self.index(&FullRange), &**other)
}
#[inline(always)]
fn ne(&self, other: &Rhs) -> bool {
PartialEq::ne(self.index(&FullRange), &**other)
}
}
#[stable]
impl<'a, A, B, Lhs> PartialEq<[B; $N]> for Lhs where
A: PartialEq<B>,
Lhs: Deref<Target=[A]>
{
#[inline(always)]
fn eq(&self, other: &[B; $N]) -> bool {
PartialEq::eq(&**self, other.index(&FullRange))
}
#[inline(always)]
fn ne(&self, other: &[B; $N]) -> bool {
PartialEq::ne(&**self, other.index(&FullRange))
}
}
#[stable]
impl<T:Eq> Eq for [T; $N] { }
#[stable]
impl<T:PartialOrd> PartialOrd for [T; $N] {
#[inline]
fn partial_cmp(&self, other: &[T; $N]) -> Option<Ordering> {
PartialOrd::partial_cmp(&self.index(&FullRange), &other.index(&FullRange))
}
#[inline]
fn lt(&self, other: &[T; $N]) -> bool {
PartialOrd::lt(&self.index(&FullRange), &other.index(&FullRange))
}
#[inline]
fn le(&self, other: &[T; $N]) -> bool {
PartialOrd::le(&self.index(&FullRange), &other.index(&FullRange))
}
#[inline]
fn ge(&self, other: &[T; $N]) -> bool {
PartialOrd::ge(&self.index(&FullRange), &other.index(&FullRange))
}
#[inline]
fn gt(&self, other: &[T; $N]) -> bool {
PartialOrd::gt(&self.index(&FullRange), &other.index(&FullRange))
}
}
#[stable]
impl<T:Ord> Ord for [T; $N] {
#[inline]
fn cmp(&self, other: &[T; $N]) -> Ordering {
Ord::cmp(&self.index(&FullRange), &other.index(&FullRange))
}
}
)+
}
}
array_impls! {
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10 11 12 13 14 15 16 17 18 19
20 21 22 23 24 25 26 27 28 29
30 31 32
}