-mod private {
- use super::*;
- use core::convert::TryInto;
-
- /// A trait marking valid underlying bitset storage types and providing the
- /// operations `EnumSet` and related types use.
- pub trait EnumSetTypeRepr :
- // Basic traits used to derive traits
- Copy +
- Ord +
- Eq +
- Debug +
- Hash +
- // Operations used by enumset
- BitAnd<Output = Self> +
- BitOr<Output = Self> +
- BitXor<Output = Self> +
- Not<Output = Self> +
- {
- const WIDTH: u32;
-
- fn is_empty(&self) -> bool;
- fn empty() -> Self;
-
- fn add_bit(&mut self, bit: u32);
- fn remove_bit(&mut self, bit: u32);
- fn has_bit(&self, bit: u32) -> bool;
-
- fn count_ones(&self) -> u32;
- fn count_remaining_ones(&self, cursor: u32) -> usize;
- fn leading_zeros(&self) -> u32;
-
- fn and_not(&self, other: Self) -> Self;
-
- fn from_u8(v: u8) -> Self;
- fn from_u16(v: u16) -> Self;
- fn from_u32(v: u32) -> Self;
- fn from_u64(v: u64) -> Self;
- fn from_u128(v: u128) -> Self;
- fn from_usize(v: usize) -> Self;
-
- fn to_u8(&self) -> u8;
- fn to_u16(&self) -> u16;
- fn to_u32(&self) -> u32;
- fn to_u64(&self) -> u64;
- fn to_u128(&self) -> u128;
- fn to_usize(&self) -> usize;
-
- fn from_u8_opt(v: u8) -> Option<Self>;
- fn from_u16_opt(v: u16) -> Option<Self>;
- fn from_u32_opt(v: u32) -> Option<Self>;
- fn from_u64_opt(v: u64) -> Option<Self>;
- fn from_u128_opt(v: u128) -> Option<Self>;
- fn from_usize_opt(v: usize) -> Option<Self>;
-
- fn to_u8_opt(&self) -> Option<u8>;
- fn to_u16_opt(&self) -> Option<u16>;
- fn to_u32_opt(&self) -> Option<u32>;
- fn to_u64_opt(&self) -> Option<u64>;
- fn to_u128_opt(&self) -> Option<u128>;
- fn to_usize_opt(&self) -> Option<usize>;
- }
- macro_rules! prim {
- ($name:ty, $width:expr) => {
- impl EnumSetTypeRepr for $name {
- const WIDTH: u32 = $width;
-
- fn is_empty(&self) -> bool { *self == 0 }
- fn empty() -> Self { 0 }
-
- fn add_bit(&mut self, bit: u32) {
- *self |= 1 << bit as $name;
- }
- fn remove_bit(&mut self, bit: u32) {
- *self &= !(1 << bit as $name);
- }
- fn has_bit(&self, bit: u32) -> bool {
- (self & (1 << bit as $name)) != 0
- }
-
- fn count_ones(&self) -> u32 { (*self).count_ones() }
- fn leading_zeros(&self) -> u32 { (*self).leading_zeros() }
-
- fn and_not(&self, other: Self) -> Self { (*self) & !other }
-
- fn count_remaining_ones(&self, cursor: u32) -> usize {
- let left_mask =
- !((1 as $name).checked_shl(cursor).unwrap_or(0).wrapping_sub(1));
- (*self & left_mask).count_ones() as usize
- }
-
- fn from_u8(v: u8) -> Self { v as $name }
- fn from_u16(v: u16) -> Self { v as $name }
- fn from_u32(v: u32) -> Self { v as $name }
- fn from_u64(v: u64) -> Self { v as $name }
- fn from_u128(v: u128) -> Self { v as $name }
- fn from_usize(v: usize) -> Self { v as $name }
-
- fn to_u8(&self) -> u8 { (*self) as u8 }
- fn to_u16(&self) -> u16 { (*self) as u16 }
- fn to_u32(&self) -> u32 { (*self) as u32 }
- fn to_u64(&self) -> u64 { (*self) as u64 }
- fn to_u128(&self) -> u128 { (*self) as u128 }
- fn to_usize(&self) -> usize { (*self) as usize }
-
- fn from_u8_opt(v: u8) -> Option<Self> { v.try_into().ok() }
- fn from_u16_opt(v: u16) -> Option<Self> { v.try_into().ok() }
- fn from_u32_opt(v: u32) -> Option<Self> { v.try_into().ok() }
- fn from_u64_opt(v: u64) -> Option<Self> { v.try_into().ok() }
- fn from_u128_opt(v: u128) -> Option<Self> { v.try_into().ok() }
- fn from_usize_opt(v: usize) -> Option<Self> { v.try_into().ok() }
-
- fn to_u8_opt(&self) -> Option<u8> { (*self).try_into().ok() }
- fn to_u16_opt(&self) -> Option<u16> { (*self).try_into().ok() }
- fn to_u32_opt(&self) -> Option<u32> { (*self).try_into().ok() }
- fn to_u64_opt(&self) -> Option<u64> { (*self).try_into().ok() }
- fn to_u128_opt(&self) -> Option<u128> { (*self).try_into().ok() }
- fn to_usize_opt(&self) -> Option<usize> { (*self).try_into().ok() }
- }
- }
- }
- prim!(u8 , 8 );
- prim!(u16 , 16 );
- prim!(u32 , 32 );
- prim!(u64 , 64 );
- prim!(u128, 128);
-}
-use crate::private::EnumSetTypeRepr;