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#![no_std]
#![forbid(missing_docs)]
pub use enumset_derive::EnumSetType;
use core::cmp::Ordering;
use core::fmt;
use core::fmt::{Debug, Formatter};
use core::hash::{Hash, Hasher};
use core::iter::FromIterator;
use core::ops::*;
#[doc(hidden)]
pub mod __internal {
use super::*;
pub use ::core as core_export;
#[cfg(feature = "serde")] pub use serde2 as serde;
pub unsafe trait EnumSetTypePrivate {
type Repr: EnumSetTypeRepr;
const ALL_BITS: Self::Repr;
fn enum_into_u32(self) -> u32;
unsafe fn enum_from_u32(val: u32) -> Self;
#[cfg(feature = "serde")]
fn serialize<S: serde::Serializer>(set: EnumSet<Self>, ser: S) -> Result<S::Ok, S::Error>
where Self: EnumSetType;
#[cfg(feature = "serde")]
fn deserialize<'de, D: serde::Deserializer<'de>>(de: D) -> Result<EnumSet<Self>, D::Error>
where Self: EnumSetType;
}
}
use crate::__internal::EnumSetTypePrivate;
#[cfg(feature = "serde")] use crate::__internal::serde;
#[cfg(feature = "serde")] use crate::serde::{Serialize, Deserialize};
mod repr;
use crate::repr::EnumSetTypeRepr;
pub unsafe trait EnumSetType: Copy + Eq + EnumSetTypePrivate { }
#[derive(Copy, Clone, PartialEq, Eq)]
pub struct EnumSet<T: EnumSetType> {
#[doc(hidden)]
pub __priv_repr: T::Repr
}
impl <T: EnumSetType> EnumSet<T> {
fn all_bits() -> T::Repr {
T::ALL_BITS
}
pub fn new() -> Self {
EnumSet { __priv_repr: T::Repr::empty() }
}
pub fn only(t: T) -> Self {
let mut set = Self::new();
set.insert(t);
set
}
pub fn empty() -> Self {
Self::new()
}
pub fn all() -> Self {
EnumSet { __priv_repr: Self::all_bits() }
}
pub fn bit_width() -> u32 {
T::Repr::WIDTH - T::ALL_BITS.leading_zeros()
}
pub fn variant_count() -> u32 {
T::ALL_BITS.count_ones()
}
pub fn len(&self) -> usize {
self.__priv_repr.count_ones() as usize
}
pub fn is_empty(&self) -> bool {
self.__priv_repr.is_empty()
}
pub fn clear(&mut self) {
self.__priv_repr = T::Repr::empty()
}
pub fn is_disjoint(&self, other: Self) -> bool {
(*self & other).is_empty()
}
pub fn is_superset(&self, other: Self) -> bool {
(*self & other).__priv_repr == other.__priv_repr
}
pub fn is_subset(&self, other: Self) -> bool {
other.is_superset(*self)
}
pub fn union(&self, other: Self) -> Self {
EnumSet { __priv_repr: self.__priv_repr | other.__priv_repr }
}
pub fn intersection(&self, other: Self) -> Self {
EnumSet { __priv_repr: self.__priv_repr & other.__priv_repr }
}
pub fn difference(&self, other: Self) -> Self {
EnumSet { __priv_repr: self.__priv_repr.and_not(other.__priv_repr) }
}
pub fn symmetrical_difference(&self, other: Self) -> Self {
EnumSet { __priv_repr: self.__priv_repr ^ other.__priv_repr }
}
pub fn complement(&self) -> Self {
EnumSet { __priv_repr: !self.__priv_repr & Self::all_bits() }
}
pub fn contains(&self, value: T) -> bool {
self.__priv_repr.has_bit(value.enum_into_u32())
}
pub fn insert(&mut self, value: T) -> bool {
let contains = !self.contains(value);
self.__priv_repr.add_bit(value.enum_into_u32());
contains
}
pub fn remove(&mut self, value: T) -> bool {
let contains = self.contains(value);
self.__priv_repr.remove_bit(value.enum_into_u32());
contains
}
pub fn insert_all(&mut self, other: Self) {
self.__priv_repr = self.__priv_repr | other.__priv_repr
}
pub fn remove_all(&mut self, other: Self) {
self.__priv_repr = self.__priv_repr.and_not(other.__priv_repr);
}
pub fn iter(&self) -> EnumSetIter<T> {
EnumSetIter(*self, 0)
}
}
macro_rules! conversion_impls {
(
$(for_num!(
$underlying:ty, $underlying_str:expr,
$from_fn:ident $to_fn:ident $from_fn_opt:ident $to_fn_opt:ident,
$from:ident $try_from:ident $from_truncated:ident
$to:ident $try_to:ident $to_truncated:ident
);)*
) => {
impl <T : EnumSetType> EnumSet<T> {$(
#[doc = "Returns a `"]
#[doc = $underlying_str]
#[doc = "` representing the elements of this set.\n\nIf the underlying bitset will \
not fit in a `"]
#[doc = $underlying_str]
#[doc = "`, this method will panic."]
pub fn $to(&self) -> $underlying {
self.$try_to().expect("Bitset will not fit into this type.")
}
#[doc = "Tries to return a `"]
#[doc = $underlying_str]
#[doc = "` representing the elements of this set.\n\nIf the underlying bitset will \
not fit in a `"]
#[doc = $underlying_str]
#[doc = "`, this method will instead return `None`."]
pub fn $try_to(&self) -> Option<$underlying> {
EnumSetTypeRepr::$to_fn_opt(&self.__priv_repr)
}
#[doc = "Returns a truncated `"]
#[doc = $underlying_str]
#[doc = "` representing the elements of this set.\n\nIf the underlying bitset will \
not fit in a `"]
#[doc = $underlying_str]
#[doc = "`, this method will truncate any bits that don't fit."]
pub fn $to_truncated(&self) -> $underlying {
EnumSetTypeRepr::$to_fn(&self.__priv_repr)
}
#[doc = "Constructs a bitset from a `"]
#[doc = $underlying_str]
#[doc = "`.\n\nIf a bit that doesn't correspond to an enum variant is set, this \
method will panic."]
pub fn $from(bits: $underlying) -> Self {
Self::$try_from(bits).expect("Bitset contains invalid variants.")
}
#[doc = "Attempts to constructs a bitset from a `"]
#[doc = $underlying_str]
#[doc = "`.\n\nIf a bit that doesn't correspond to an enum variant is set, this \
method will return `None`."]
pub fn $try_from(bits: $underlying) -> Option<Self> {
let bits = T::Repr::$from_fn_opt(bits);
let mask = Self::all().__priv_repr;
bits.and_then(|bits| if bits.and_not(mask).is_empty() {
Some(EnumSet { __priv_repr: bits })
} else {
None
})
}
#[doc = "Constructs a bitset from a `"]
#[doc = $underlying_str]
#[doc = "`, ignoring invalid variants."]
pub fn $from_truncated(bits: $underlying) -> Self {
let mask = Self::all().$to_truncated();
let bits = <T::Repr as EnumSetTypeRepr>::$from_fn(bits & mask);
EnumSet { __priv_repr: bits }
}
)*}
}
}
conversion_impls! {
for_num!(u8, "u8", from_u8 to_u8 from_u8_opt to_u8_opt,
from_u8 try_from_u8 from_u8_truncated as_u8 try_as_u8 as_u8_truncated);
for_num!(u16, "u16", from_u16 to_u16 from_u16_opt to_u16_opt,
from_u16 try_from_u16 from_u16_truncated as_u16 try_as_u16 as_u16_truncated);
for_num!(u32, "u32", from_u32 to_u32 from_u32_opt to_u32_opt,
from_u32 try_from_u32 from_u32_truncated as_u32 try_as_u32 as_u32_truncated);
for_num!(u64, "u64", from_u64 to_u64 from_u64_opt to_u64_opt,
from_u64 try_from_u64 from_u64_truncated as_u64 try_as_u64 as_u64_truncated);
for_num!(u128, "u128", from_u128 to_u128 from_u128_opt to_u128_opt,
from_u128 try_from_u128 from_u128_truncated as_u128 try_as_u128 as_u128_truncated);
for_num!(usize, "usize", from_usize to_usize from_usize_opt to_usize_opt,
from_usize try_from_usize from_usize_truncated
as_usize try_as_usize as_usize_truncated);
}
impl <T: EnumSetType> Default for EnumSet<T> {
fn default() -> Self {
Self::new()
}
}
impl <T: EnumSetType> IntoIterator for EnumSet<T> {
type Item = T;
type IntoIter = EnumSetIter<T>;
fn into_iter(self) -> Self::IntoIter {
self.iter()
}
}
impl <T: EnumSetType, O: Into<EnumSet<T>>> Sub<O> for EnumSet<T> {
type Output = Self;
fn sub(self, other: O) -> Self::Output {
self.difference(other.into())
}
}
impl <T: EnumSetType, O: Into<EnumSet<T>>> BitAnd<O> for EnumSet<T> {
type Output = Self;
fn bitand(self, other: O) -> Self::Output {
self.intersection(other.into())
}
}
impl <T: EnumSetType, O: Into<EnumSet<T>>> BitOr<O> for EnumSet<T> {
type Output = Self;
fn bitor(self, other: O) -> Self::Output {
self.union(other.into())
}
}
impl <T: EnumSetType, O: Into<EnumSet<T>>> BitXor<O> for EnumSet<T> {
type Output = Self;
fn bitxor(self, other: O) -> Self::Output {
self.symmetrical_difference(other.into())
}
}
impl <T: EnumSetType, O: Into<EnumSet<T>>> SubAssign<O> for EnumSet<T> {
fn sub_assign(&mut self, rhs: O) {
*self = *self - rhs;
}
}
impl <T: EnumSetType, O: Into<EnumSet<T>>> BitAndAssign<O> for EnumSet<T> {
fn bitand_assign(&mut self, rhs: O) {
*self = *self & rhs;
}
}
impl <T: EnumSetType, O: Into<EnumSet<T>>> BitOrAssign<O> for EnumSet<T> {
fn bitor_assign(&mut self, rhs: O) {
*self = *self | rhs;
}
}
impl <T: EnumSetType, O: Into<EnumSet<T>>> BitXorAssign<O> for EnumSet<T> {
fn bitxor_assign(&mut self, rhs: O) {
*self = *self ^ rhs;
}
}
impl <T: EnumSetType> Not for EnumSet<T> {
type Output = Self;
fn not(self) -> Self::Output {
self.complement()
}
}
impl <T: EnumSetType> From<T> for EnumSet<T> {
fn from(t: T) -> Self {
EnumSet::only(t)
}
}
impl <T: EnumSetType> PartialEq<T> for EnumSet<T> {
fn eq(&self, other: &T) -> bool {
self.__priv_repr == EnumSet::only(*other).__priv_repr
}
}
impl <T: EnumSetType + Debug> Debug for EnumSet<T> {
fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
let mut is_first = true;
f.write_str("EnumSet(")?;
for v in self.iter() {
if !is_first { f.write_str(" | ")?; }
is_first = false;
v.fmt(f)?;
}
f.write_str(")")?;
Ok(())
}
}
impl <T: EnumSetType> Hash for EnumSet<T> {
fn hash<H: Hasher>(&self, state: &mut H) {
self.__priv_repr.hash(state)
}
}
impl <T: EnumSetType> PartialOrd for EnumSet<T> {
fn partial_cmp(&self, other: &Self) -> Option<Ordering> {
self.__priv_repr.partial_cmp(&other.__priv_repr)
}
}
impl <T: EnumSetType> Ord for EnumSet<T> {
fn cmp(&self, other: &Self) -> Ordering {
self.__priv_repr.cmp(&other.__priv_repr)
}
}
#[cfg(feature = "serde")]
impl <T: EnumSetType> Serialize for EnumSet<T> {
fn serialize<S: serde::Serializer>(&self, serializer: S) -> Result<S::Ok, S::Error> {
T::serialize(*self, serializer)
}
}
#[cfg(feature = "serde")]
impl <'de, T: EnumSetType> Deserialize<'de> for EnumSet<T> {
fn deserialize<D: serde::Deserializer<'de>>(deserializer: D) -> Result<Self, D::Error> {
T::deserialize(deserializer)
}
}
#[derive(Clone, Debug)]
pub struct EnumSetIter<T: EnumSetType>(EnumSet<T>, u32);
impl <T: EnumSetType> Iterator for EnumSetIter<T> {
type Item = T;
fn next(&mut self) -> Option<Self::Item> {
while self.1 < EnumSet::<T>::bit_width() {
let bit = self.1;
self.1 += 1;
if self.0.__priv_repr.has_bit(bit) {
return unsafe { Some(T::enum_from_u32(bit)) }
}
}
None
}
fn size_hint(&self) -> (usize, Option<usize>) {
let left = self.0.__priv_repr.count_remaining_ones(self.1);
(left, Some(left))
}
}
impl<T: EnumSetType> ExactSizeIterator for EnumSetIter<T> {}
impl<T: EnumSetType> Extend<T> for EnumSet<T> {
fn extend<I: IntoIterator<Item = T>>(&mut self, iter: I) {
iter.into_iter().for_each(|v| { self.insert(v); });
}
}
impl<T: EnumSetType> FromIterator<T> for EnumSet<T> {
fn from_iter<I: IntoIterator<Item = T>>(iter: I) -> Self {
let mut set = EnumSet::default();
set.extend(iter);
set
}
}
impl<T: EnumSetType> Extend<EnumSet<T>> for EnumSet<T> {
fn extend<I: IntoIterator<Item = EnumSet<T>>>(&mut self, iter: I) {
iter.into_iter().for_each(|v| { self.insert_all(v); });
}
}
impl<T: EnumSetType> FromIterator<EnumSet<T>> for EnumSet<T> {
fn from_iter<I: IntoIterator<Item = EnumSet<T>>>(iter: I) -> Self {
let mut set = EnumSet::default();
set.extend(iter);
set
}
}
#[macro_export]
macro_rules! enum_set {
($(|)*) => {
$crate::EnumSet { __priv_repr: 0 }
};
($value:path $(|)*) => {
$value.__impl_enumset_internal__const_only()
};
($value:path | $($rest:path)|* $(|)*) => {
{
#[allow(deprecated)] let value = $value.__impl_enumset_internal__const_only();
$(#[allow(deprecated)] let value = $rest.__impl_enumset_internal__const_merge(value);)*
value
}
};
}