#[macro_export]
macro_rules! impl_array_newtype {
($thing:ident, $ty:ty, $len:expr) => {
impl $thing {
#[inline]
pub fn as_ptr(&self) -> *const $ty {
let &$thing(ref dat) = self;
dat.as_ptr()
}
#[inline]
pub fn as_mut_ptr(&mut self) -> *mut $ty {
let &mut $thing(ref mut dat) = self;
dat.as_mut_ptr()
}
#[inline]
pub fn len(&self) -> usize {
$len
}
#[inline]
pub fn is_empty(&self) -> bool {
false
}
#[inline]
pub fn as_bytes(&self) -> &[$ty; $len] {
&self.0
}
#[inline]
pub fn to_bytes(&self) -> [$ty; $len] {
self.0.clone()
}
#[inline]
pub fn into_bytes(self) -> [$ty; $len] {
self.0
}
}
impl<'a> From<&'a [$ty]> for $thing {
fn from(data: &'a [$ty]) -> $thing {
assert_eq!(data.len(), $len);
let mut ret = [0; $len];
ret.copy_from_slice(&data[..]);
$thing(ret)
}
}
impl_index_newtype!($thing, $ty);
impl PartialEq for $thing {
#[inline]
fn eq(&self, other: &$thing) -> bool {
&self[..] == &other[..]
}
}
impl Eq for $thing {}
impl PartialOrd for $thing {
#[inline]
fn partial_cmp(&self, other: &$thing) -> Option<::std::cmp::Ordering> {
Some(self.cmp(&other))
}
}
impl Ord for $thing {
#[inline]
fn cmp(&self, other: &$thing) -> ::std::cmp::Ordering {
for i in 0..$len {
if self[$len - 1 - i] < other[$len - 1 - i] {
return ::std::cmp::Ordering::Less;
}
if self[$len - 1 - i] > other[$len - 1 - i] {
return ::std::cmp::Ordering::Greater;
}
}
::std::cmp::Ordering::Equal
}
}
#[cfg_attr(feature = "clippy", allow(expl_impl_clone_on_copy))] impl Clone for $thing {
#[inline]
fn clone(&self) -> $thing {
$thing::from(&self[..])
}
}
impl Copy for $thing {}
impl ::std::hash::Hash for $thing {
#[inline]
fn hash<H>(&self, state: &mut H)
where
H: ::std::hash::Hasher,
{
(&self[..]).hash(state);
}
fn hash_slice<H>(data: &[$thing], state: &mut H)
where
H: ::std::hash::Hasher,
{
for d in data.iter() {
(&d[..]).hash(state);
}
}
}
};
}
#[macro_export]
macro_rules! impl_array_newtype_encodable {
($thing:ident, $ty:ty, $len:expr) => {
#[cfg(feature = "serde")]
impl<'de> $crate::serde::Deserialize<'de> for $thing {
fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
where
D: $crate::serde::Deserializer<'de>,
{
use $crate::std::fmt::{self, Formatter};
struct Visitor;
impl<'de> $crate::serde::de::Visitor<'de> for Visitor {
type Value = $thing;
fn expecting(&self, formatter: &mut Formatter) -> fmt::Result {
formatter.write_str("a fixed size array")
}
#[inline]
fn visit_seq<A>(self, mut seq: A) -> Result<Self::Value, A::Error>
where
A: $crate::serde::de::SeqAccess<'de>,
{
let mut ret: [$ty; $len] = [0; $len];
for item in ret.iter_mut() {
*item = match seq.next_element()? {
Some(c) => c,
None => {
return Err($crate::serde::de::Error::custom("end of stream"));
}
};
}
Ok($thing(ret))
}
}
deserializer.deserialize_seq(Visitor)
}
}
#[cfg(feature = "serde")]
impl $crate::serde::Serialize for $thing {
fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
where
S: $crate::serde::Serializer,
{
let &$thing(ref dat) = self;
(&dat[..]).serialize(serializer)
}
}
};
}
#[macro_export]
macro_rules! impl_array_newtype_show {
($thing:ident) => {
impl ::std::fmt::Debug for $thing {
fn fmt(&self, f: &mut ::std::fmt::Formatter) -> ::std::fmt::Result {
write!(f, concat!(stringify!($thing), "({:?})"), &self[..])
}
}
};
}
#[macro_export]
macro_rules! impl_index_newtype {
($thing:ident, $ty:ty) => {
impl ::std::ops::Index<usize> for $thing {
type Output = $ty;
#[inline]
fn index(&self, index: usize) -> &$ty {
let &$thing(ref dat) = self;
&dat[index]
}
}
impl ::std::ops::Index<::std::ops::Range<usize>> for $thing {
type Output = [$ty];
#[inline]
fn index(&self, index: ::std::ops::Range<usize>) -> &[$ty] {
&self.0[index]
}
}
impl ::std::ops::Index<::std::ops::RangeTo<usize>> for $thing {
type Output = [$ty];
#[inline]
fn index(&self, index: ::std::ops::RangeTo<usize>) -> &[$ty] {
&self.0[index]
}
}
impl ::std::ops::Index<::std::ops::RangeFrom<usize>> for $thing {
type Output = [$ty];
#[inline]
fn index(&self, index: ::std::ops::RangeFrom<usize>) -> &[$ty] {
&self.0[index]
}
}
impl ::std::ops::Index<::std::ops::RangeFull> for $thing {
type Output = [$ty];
#[inline]
fn index(&self, _: ::std::ops::RangeFull) -> &[$ty] {
&self.0[..]
}
}
};
}