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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.
#![unstable(feature = "core")] // not yet reviewed
use clone::Clone;
use cmp::{PartialEq, Eq, PartialOrd, Ord, Ordering};
use fmt;
use hash::{Hash, self};
use iter::IntoIterator;
use marker::{Copy, Sized};
use option::Option;
use slice::{Iter, IterMut, SliceExt};
// macro for implementing n-ary tuple functions and operations
macro_rules! array_impls {
($($N:expr)+) => {
$(
#[stable(feature = "rust1", since = "1.0.0")]
impl<T:Copy> Clone for [T; $N] {
fn clone(&self) -> [T; $N] {
*self
}
}
#[stable(feature = "rust1", since = "1.0.0")]
impl<T: Hash> Hash for [T; $N] {
fn hash<H: hash::Hasher>(&self, state: &mut H) {
Hash::hash(&self[..], state)
}
}
#[stable(feature = "rust1", since = "1.0.0")]
impl<T: fmt::Debug> fmt::Debug for [T; $N] {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
fmt::Debug::fmt(&&self[..], f)
}
}
#[stable(feature = "rust1", since = "1.0.0")]
impl<'a, T> IntoIterator for &'a [T; $N] {
type Item = &'a T;
type IntoIter = Iter<'a, T>;
fn into_iter(self) -> Iter<'a, T> {
self.iter()
}
}
#[stable(feature = "rust1", since = "1.0.0")]
impl<'a, T> IntoIterator for &'a mut [T; $N] {
type Item = &'a mut T;
type IntoIter = IterMut<'a, T>;
fn into_iter(self) -> IterMut<'a, T> {
self.iter_mut()
}
}
// NOTE: some less important impls are omitted to reduce code bloat
__impl_slice_eq1! { [A; $N], [B; $N] }
__impl_slice_eq2! { [A; $N], [B] }
__impl_slice_eq2! { [A; $N], &'b [B] }
__impl_slice_eq2! { [A; $N], &'b mut [B] }
// __impl_slice_eq2! { [A; $N], &'b [B; $N] }
// __impl_slice_eq2! { [A; $N], &'b mut [B; $N] }
#[stable(feature = "rust1", since = "1.0.0")]
impl<T:Eq> Eq for [T; $N] { }
#[stable(feature = "rust1", since = "1.0.0")]
impl<T:PartialOrd> PartialOrd for [T; $N] {
#[inline]
fn partial_cmp(&self, other: &[T; $N]) -> Option<Ordering> {
PartialOrd::partial_cmp(&&self[..], &&other[..])
}
#[inline]
fn lt(&self, other: &[T; $N]) -> bool {
PartialOrd::lt(&&self[..], &&other[..])
}
#[inline]
fn le(&self, other: &[T; $N]) -> bool {
PartialOrd::le(&&self[..], &&other[..])
}
#[inline]
fn ge(&self, other: &[T; $N]) -> bool {
PartialOrd::ge(&&self[..], &&other[..])
}
#[inline]
fn gt(&self, other: &[T; $N]) -> bool {
PartialOrd::gt(&&self[..], &&other[..])
}
}
#[stable(feature = "rust1", since = "1.0.0")]
impl<T:Ord> Ord for [T; $N] {
#[inline]
fn cmp(&self, other: &[T; $N]) -> Ordering {
Ord::cmp(&&self[..], &&other[..])
}
}
)+
}
}
array_impls! {
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30 31 32
}
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