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use core::{cmp, hash};
#[derive(Debug)]
#[cfg_attr(feature = "validation", derive(bytecheck::CheckBytes))]
#[repr(u8)]
pub enum ArchivedOption<T> {
None,
Some(T),
}
impl<T> ArchivedOption<T> {
#[inline]
pub fn is_none(&self) -> bool {
match self {
ArchivedOption::None => true,
ArchivedOption::Some(_) => false,
}
}
#[inline]
pub fn is_some(&self) -> bool {
match self {
ArchivedOption::None => false,
ArchivedOption::Some(_) => true,
}
}
#[inline]
pub fn as_ref(&self) -> Option<&T> {
match self {
ArchivedOption::None => None,
ArchivedOption::Some(value) => Some(value),
}
}
#[inline]
pub fn as_mut(&mut self) -> Option<&mut T> {
match self {
ArchivedOption::None => None,
ArchivedOption::Some(value) => Some(value),
}
}
#[inline]
pub fn get_or_insert(&mut self, v: T) -> &mut T {
self.get_or_insert_with(move || v)
}
#[inline]
pub fn get_or_insert_with<F: FnOnce() -> T>(&mut self, f: F) -> &mut T {
if let ArchivedOption::Some(ref mut value) = self {
value
} else {
*self = ArchivedOption::Some(f());
self.as_mut().unwrap()
}
}
}
impl<T: Eq> Eq for ArchivedOption<T> {}
impl<T: hash::Hash> hash::Hash for ArchivedOption<T> {
#[inline]
fn hash<H: hash::Hasher>(&self, state: &mut H) {
self.as_ref().hash(state)
}
}
impl<T: Ord> Ord for ArchivedOption<T> {
#[inline]
fn cmp(&self, other: &Self) -> cmp::Ordering {
self.as_ref().cmp(&other.as_ref())
}
}
impl<T: PartialEq> PartialEq for ArchivedOption<T> {
#[inline]
fn eq(&self, other: &Self) -> bool {
self.as_ref().eq(&other.as_ref())
}
}
impl<T: PartialOrd> PartialOrd for ArchivedOption<T> {
#[inline]
fn partial_cmp(&self, other: &Self) -> Option<cmp::Ordering> {
self.as_ref().partial_cmp(&other.as_ref())
}
}
impl<T, U: PartialEq<T>> PartialEq<Option<T>> for ArchivedOption<U> {
#[inline]
fn eq(&self, other: &Option<T>) -> bool {
if let ArchivedOption::Some(self_value) = self {
if let Some(other_value) = other {
self_value.eq(other_value)
} else {
false
}
} else {
other.is_none()
}
}
}
impl<T: PartialEq<U>, U> PartialEq<ArchivedOption<T>> for Option<U> {
#[inline]
fn eq(&self, other: &ArchivedOption<T>) -> bool {
other.eq(self)
}
}