#[repr(C)]pub struct BitPtrRange<M = Const, T = usize, O = Lsb0>{
pub start: BitPtr<M, T, O>,
pub end: BitPtr<M, T, O>,
}
Expand description
§Bit-Pointer Range
This type is equivalent in purpose, but superior in functionality, to
Range<BitPtr<M, T, O>>
. If the standard library stabilizes Step
, the trait
used to drive Range
operations, then this type will likely be destroyed in
favor of an impl Step for BitPtr
block and use of standard ranges.
Like Range
, this is a half-open set where the low bit-pointer selects the
first live bit in a span and the high bit-pointer selects the first dead bit
after the span.
This type is not capable of inspecting provenance, and has no requirement of its
own that both bit-pointers be derived from the same provenance region. It is
safe to construct and use with any pair of bit-pointers; however, the
bit-pointers it produces are, necessarily, unsafe
to use.
§Original
§Memory Representation
BitPtr
is required to be repr(packed)
in order to satisfy the BitRef
size optimizations. In order to stay minimally sized itself, this type has no
alignment requirement, and reading either bit-pointer may incur a misalignment
penalty. Reads are always safe and valid; they may merely be slow.
§Type Parameters
This takes the same type parameters as BitPtr
, as it is simply a pair of
bit-pointers with range semantics.
Fields§
§start: BitPtr<M, T, O>
The lower, inclusive, bound of the range. The bit to which this points is considered live.
end: BitPtr<M, T, O>
The higher, exclusive, bound of the range. The bit to which this points is considered dead, and the pointer may be one bit beyond the bounds of an allocation region.
Because Rust and LLVM both define the address of base + (len * width)
as being within the provenance of base
, even though that address may
itself be the base address of another region in a different provenance,
and bit-pointers are always composed of an ordinary memory address and a
bit-counter, the ending bit-pointer is always valid.
Implementations§
Source§impl<M, T, O> BitPtrRange<M, T, O>
impl<M, T, O> BitPtrRange<M, T, O>
Sourcepub const EMPTY: Self = _
pub const EMPTY: Self = _
The canonical empty range. All ranges with zero length (equal .start
and .end
) are equally empty.
Sourcepub fn from_range(_: Range<BitPtr<M, T, O>>) -> Self
pub fn from_range(_: Range<BitPtr<M, T, O>>) -> Self
Explicitly converts a Range<BitPtr>
into a BitPtrRange
.
Sourcepub fn into_range(self) -> Range<BitPtr<M, T, O>>
pub fn into_range(self) -> Range<BitPtr<M, T, O>>
Explicitly converts a BitPtrRange
into a Range<BitPtr>
.
Sourcepub fn is_empty(&self) -> bool
pub fn is_empty(&self) -> bool
Tests if the range is empty (the distance between bit-pointers is 0
).
§Original
§Examples
use bitvec::prelude::*;
use bitvec::ptr::BitPtrRange;
let data = 0u8;
let bp = BitPtr::<_, _, Lsb0>::from_ref(&data);
let mut range = BitPtrRange::from_range(bp .. bp.wrapping_add(1));
assert!(!range.is_empty());
assert_ne!(range.start, range.end);
range.next();
assert!(range.is_empty());
assert_eq!(range.start, range.end);
Sourcepub fn contains<M2, T2>(&self, pointer: &BitPtr<M2, T2, O>) -> boolwhere
M2: Mutability,
T2: BitStore,
pub fn contains<M2, T2>(&self, pointer: &BitPtr<M2, T2, O>) -> boolwhere
M2: Mutability,
T2: BitStore,
Tests if a given bit-pointer is contained within the range.
Bit-pointer ordering is defined when the types have the same exact
BitOrder
type parameter and the same BitStore::Mem
associated type
(but are free to differ in alias condition!). Inclusion in a range
occurs when the bit-pointer is not strictly less than the range start,
and is strictly less than the range end.
§Original
§Examples
use bitvec::prelude::*;
use bitvec::ptr::BitPtrRange;
use core::cell::Cell;
let data = 0u16;
let bp = BitPtr::<_, _, Lsb0>::from_ref(&data);
let mut range = BitPtrRange::from_range(bp .. bp.wrapping_add(16));
range.nth(2);
range.nth_back(2);
assert!(bp < range.start);
assert!(!range.contains(&bp));
let mid = bp.wrapping_add(8);
let same_mem = mid.cast::<Cell<u16>>();
assert!(range.contains(&mid));
Casting to a different BitStore
type whose Mem
parameter differs
from the range always results in a false
response, even if the pointer
being tested is numerically within the range.
Trait Implementations§
Source§impl<M, T, O> Clone for BitPtrRange<M, T, O>
impl<M, T, O> Clone for BitPtrRange<M, T, O>
Source§impl<M, T, O> Debug for BitPtrRange<M, T, O>
impl<M, T, O> Debug for BitPtrRange<M, T, O>
Source§impl<M, T, O> Default for BitPtrRange<M, T, O>
impl<M, T, O> Default for BitPtrRange<M, T, O>
Source§impl<M, T, O> DoubleEndedIterator for BitPtrRange<M, T, O>
impl<M, T, O> DoubleEndedIterator for BitPtrRange<M, T, O>
Source§fn next_back(&mut self) -> Option<Self::Item>
fn next_back(&mut self) -> Option<Self::Item>
Source§fn nth_back(&mut self, n: usize) -> Option<Self::Item>
fn nth_back(&mut self, n: usize) -> Option<Self::Item>
n
th element from the end of the iterator. Read moreSource§fn advance_back_by(&mut self, n: usize) -> Result<(), NonZero<usize>>
fn advance_back_by(&mut self, n: usize) -> Result<(), NonZero<usize>>
iter_advance_by
)n
elements. Read more1.27.0 · Source§fn try_rfold<B, F, R>(&mut self, init: B, f: F) -> R
fn try_rfold<B, F, R>(&mut self, init: B, f: F) -> R
Iterator::try_fold()
: it takes
elements starting from the back of the iterator. Read moreSource§impl<M, T, O> ExactSizeIterator for BitPtrRange<M, T, O>
impl<M, T, O> ExactSizeIterator for BitPtrRange<M, T, O>
Source§impl<M, T, O> From<BitPtrRange<M, T, O>> for Range<BitPtr<M, T, O>>
impl<M, T, O> From<BitPtrRange<M, T, O>> for Range<BitPtr<M, T, O>>
Source§fn from(range: BitPtrRange<M, T, O>) -> Self
fn from(range: BitPtrRange<M, T, O>) -> Self
Source§impl<M, T, O> Hash for BitPtrRange<M, T, O>
impl<M, T, O> Hash for BitPtrRange<M, T, O>
Source§impl<M, T, O> Iterator for BitPtrRange<M, T, O>
impl<M, T, O> Iterator for BitPtrRange<M, T, O>
Source§fn size_hint(&self) -> (usize, Option<usize>)
fn size_hint(&self) -> (usize, Option<usize>)
Source§fn count(self) -> usize
fn count(self) -> usize
Source§fn last(self) -> Option<Self::Item>
fn last(self) -> Option<Self::Item>
Source§fn next(&mut self) -> Option<Self::Item>
fn next(&mut self) -> Option<Self::Item>
Source§fn nth(&mut self, n: usize) -> Option<Self::Item>
fn nth(&mut self, n: usize) -> Option<Self::Item>
n
th element of the iterator. Read moreSource§fn next_chunk<const N: usize>(
&mut self,
) -> Result<[Self::Item; N], IntoIter<Self::Item, N>>where
Self: Sized,
fn next_chunk<const N: usize>(
&mut self,
) -> Result<[Self::Item; N], IntoIter<Self::Item, N>>where
Self: Sized,
iter_next_chunk
)N
values. Read moreSource§fn advance_by(&mut self, n: usize) -> Result<(), NonZero<usize>>
fn advance_by(&mut self, n: usize) -> Result<(), NonZero<usize>>
iter_advance_by
)n
elements. Read more1.28.0 · Source§fn step_by(self, step: usize) -> StepBy<Self>where
Self: Sized,
fn step_by(self, step: usize) -> StepBy<Self>where
Self: Sized,
1.0.0 · Source§fn chain<U>(self, other: U) -> Chain<Self, <U as IntoIterator>::IntoIter>
fn chain<U>(self, other: U) -> Chain<Self, <U as IntoIterator>::IntoIter>
1.0.0 · Source§fn zip<U>(self, other: U) -> Zip<Self, <U as IntoIterator>::IntoIter>where
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U: IntoIterator,
fn zip<U>(self, other: U) -> Zip<Self, <U as IntoIterator>::IntoIter>where
Self: Sized,
U: IntoIterator,
Source§fn intersperse(self, separator: Self::Item) -> Intersperse<Self>
fn intersperse(self, separator: Self::Item) -> Intersperse<Self>
iter_intersperse
)separator
between adjacent
items of the original iterator. Read moreSource§fn intersperse_with<G>(self, separator: G) -> IntersperseWith<Self, G>
fn intersperse_with<G>(self, separator: G) -> IntersperseWith<Self, G>
iter_intersperse
)separator
between adjacent items of the original iterator. Read more1.0.0 · Source§fn map<B, F>(self, f: F) -> Map<Self, F> ⓘ
fn map<B, F>(self, f: F) -> Map<Self, F> ⓘ
1.0.0 · Source§fn filter<P>(self, predicate: P) -> Filter<Self, P>
fn filter<P>(self, predicate: P) -> Filter<Self, P>
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fn filter_map<B, F>(self, f: F) -> FilterMap<Self, F>
1.0.0 · Source§fn enumerate(self) -> Enumerate<Self>where
Self: Sized,
fn enumerate(self) -> Enumerate<Self>where
Self: Sized,
1.0.0 · Source§fn skip_while<P>(self, predicate: P) -> SkipWhile<Self, P>
fn skip_while<P>(self, predicate: P) -> SkipWhile<Self, P>
1.0.0 · Source§fn take_while<P>(self, predicate: P) -> TakeWhile<Self, P>
fn take_while<P>(self, predicate: P) -> TakeWhile<Self, P>
1.57.0 · Source§fn map_while<B, P>(self, predicate: P) -> MapWhile<Self, P>
fn map_while<B, P>(self, predicate: P) -> MapWhile<Self, P>
1.0.0 · Source§fn skip(self, n: usize) -> Skip<Self>where
Self: Sized,
fn skip(self, n: usize) -> Skip<Self>where
Self: Sized,
n
elements. Read more1.0.0 · Source§fn take(self, n: usize) -> Take<Self>where
Self: Sized,
fn take(self, n: usize) -> Take<Self>where
Self: Sized,
n
elements, or fewer
if the underlying iterator ends sooner. Read more1.0.0 · Source§fn flat_map<U, F>(self, f: F) -> FlatMap<Self, U, F>
fn flat_map<U, F>(self, f: F) -> FlatMap<Self, U, F>
Source§fn map_windows<F, R, const N: usize>(self, f: F) -> MapWindows<Self, F, N>
fn map_windows<F, R, const N: usize>(self, f: F) -> MapWindows<Self, F, N>
iter_map_windows
)f
for each contiguous window of size N
over
self
and returns an iterator over the outputs of f
. Like slice::windows()
,
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fn inspect<F>(self, f: F) -> Inspect<Self, F>
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Self: Sized,
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Source§fn collect_into<E>(self, collection: &mut E) -> &mut E
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iter_collect_into
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fn partition<B, F>(self, f: F) -> (B, B)
Source§fn partition_in_place<'a, T, P>(self, predicate: P) -> usize
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)true
precede all those that return false
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iter_is_partitioned
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fn try_fold<B, F, R>(&mut self, init: B, f: F) -> R
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fn try_for_each<F, R>(&mut self, f: F) -> R
1.0.0 · Source§fn fold<B, F>(self, init: B, f: F) -> B
fn fold<B, F>(self, init: B, f: F) -> B
1.51.0 · Source§fn reduce<F>(self, f: F) -> Option<Self::Item>
fn reduce<F>(self, f: F) -> Option<Self::Item>
Source§fn try_reduce<R>(
&mut self,
f: impl FnMut(Self::Item, Self::Item) -> R,
) -> <<R as Try>::Residual as Residual<Option<<R as Try>::Output>>>::TryType
fn try_reduce<R>( &mut self, f: impl FnMut(Self::Item, Self::Item) -> R, ) -> <<R as Try>::Residual as Residual<Option<<R as Try>::Output>>>::TryType
iterator_try_reduce
)1.0.0 · Source§fn all<F>(&mut self, f: F) -> bool
fn all<F>(&mut self, f: F) -> bool
1.0.0 · Source§fn any<F>(&mut self, f: F) -> bool
fn any<F>(&mut self, f: F) -> bool
1.0.0 · Source§fn find<P>(&mut self, predicate: P) -> Option<Self::Item>
fn find<P>(&mut self, predicate: P) -> Option<Self::Item>
1.30.0 · Source§fn find_map<B, F>(&mut self, f: F) -> Option<B>
fn find_map<B, F>(&mut self, f: F) -> Option<B>
Source§fn try_find<R>(
&mut self,
f: impl FnMut(&Self::Item) -> R,
) -> <<R as Try>::Residual as Residual<Option<Self::Item>>>::TryType
fn try_find<R>( &mut self, f: impl FnMut(&Self::Item) -> R, ) -> <<R as Try>::Residual as Residual<Option<Self::Item>>>::TryType
try_find
)1.0.0 · Source§fn position<P>(&mut self, predicate: P) -> Option<usize>
fn position<P>(&mut self, predicate: P) -> Option<usize>
1.0.0 · Source§fn rposition<P>(&mut self, predicate: P) -> Option<usize>
fn rposition<P>(&mut self, predicate: P) -> Option<usize>
1.0.0 · Source§fn max(self) -> Option<Self::Item>
fn max(self) -> Option<Self::Item>
1.0.0 · Source§fn min(self) -> Option<Self::Item>
fn min(self) -> Option<Self::Item>
1.6.0 · Source§fn max_by_key<B, F>(self, f: F) -> Option<Self::Item>
fn max_by_key<B, F>(self, f: F) -> Option<Self::Item>
1.15.0 · Source§fn max_by<F>(self, compare: F) -> Option<Self::Item>
fn max_by<F>(self, compare: F) -> Option<Self::Item>
1.6.0 · Source§fn min_by_key<B, F>(self, f: F) -> Option<Self::Item>
fn min_by_key<B, F>(self, f: F) -> Option<Self::Item>
1.15.0 · Source§fn min_by<F>(self, compare: F) -> Option<Self::Item>
fn min_by<F>(self, compare: F) -> Option<Self::Item>
1.0.0 · Source§fn rev(self) -> Rev<Self>where
Self: Sized + DoubleEndedIterator,
fn rev(self) -> Rev<Self>where
Self: Sized + DoubleEndedIterator,
1.0.0 · Source§fn unzip<A, B, FromA, FromB>(self) -> (FromA, FromB)
fn unzip<A, B, FromA, FromB>(self) -> (FromA, FromB)
1.36.0 · Source§fn copied<'a, T>(self) -> Copied<Self>
fn copied<'a, T>(self) -> Copied<Self>
Source§fn array_chunks<const N: usize>(self) -> ArrayChunks<Self, N>where
Self: Sized,
fn array_chunks<const N: usize>(self) -> ArrayChunks<Self, N>where
Self: Sized,
iter_array_chunks
)N
elements of the iterator at a time. Read more1.11.0 · Source§fn product<P>(self) -> P
fn product<P>(self) -> P
Source§fn cmp_by<I, F>(self, other: I, cmp: F) -> Ordering
fn cmp_by<I, F>(self, other: I, cmp: F) -> Ordering
iter_order_by
)Iterator
with those
of another with respect to the specified comparison function. Read more1.5.0 · Source§fn partial_cmp<I>(self, other: I) -> Option<Ordering>
fn partial_cmp<I>(self, other: I) -> Option<Ordering>
PartialOrd
elements of
this Iterator
with those of another. The comparison works like short-circuit
evaluation, returning a result without comparing the remaining elements.
As soon as an order can be determined, the evaluation stops and a result is returned. Read moreSource§fn partial_cmp_by<I, F>(self, other: I, partial_cmp: F) -> Option<Ordering>where
Self: Sized,
I: IntoIterator,
F: FnMut(Self::Item, <I as IntoIterator>::Item) -> Option<Ordering>,
fn partial_cmp_by<I, F>(self, other: I, partial_cmp: F) -> Option<Ordering>where
Self: Sized,
I: IntoIterator,
F: FnMut(Self::Item, <I as IntoIterator>::Item) -> Option<Ordering>,
iter_order_by
)Iterator
with those
of another with respect to the specified comparison function. Read moreSource§fn eq_by<I, F>(self, other: I, eq: F) -> bool
fn eq_by<I, F>(self, other: I, eq: F) -> bool
iter_order_by
)1.5.0 · Source§fn lt<I>(self, other: I) -> bool
fn lt<I>(self, other: I) -> bool
Iterator
are lexicographically
less than those of another. Read more1.5.0 · Source§fn le<I>(self, other: I) -> bool
fn le<I>(self, other: I) -> bool
Iterator
are lexicographically
less or equal to those of another. Read more1.5.0 · Source§fn gt<I>(self, other: I) -> bool
fn gt<I>(self, other: I) -> bool
Iterator
are lexicographically
greater than those of another. Read more1.5.0 · Source§fn ge<I>(self, other: I) -> bool
fn ge<I>(self, other: I) -> bool
Iterator
are lexicographically
greater than or equal to those of another. Read more1.82.0 · Source§fn is_sorted(self) -> bool
fn is_sorted(self) -> bool
1.82.0 · Source§fn is_sorted_by<F>(self, compare: F) -> bool
fn is_sorted_by<F>(self, compare: F) -> bool
1.82.0 · Source§fn is_sorted_by_key<F, K>(self, f: F) -> bool
fn is_sorted_by_key<F, K>(self, f: F) -> bool
Source§impl<M1, M2, O, T1, T2> PartialEq<BitPtrRange<M2, T2, O>> for BitPtrRange<M1, T1, O>
impl<M1, M2, O, T1, T2> PartialEq<BitPtrRange<M2, T2, O>> for BitPtrRange<M1, T1, O>
Source§impl<M, T, O> RangeBounds<BitPtr<M, T, O>> for BitPtrRange<M, T, O>
impl<M, T, O> RangeBounds<BitPtr<M, T, O>> for BitPtrRange<M, T, O>
impl<M, T, O> Eq for BitPtrRange<M, T, O>
impl<M, T, O> FusedIterator for BitPtrRange<M, T, O>
Auto Trait Implementations§
impl<M, T, O> Freeze for BitPtrRange<M, T, O>where
M: Freeze,
impl<M, T, O> RefUnwindSafe for BitPtrRange<M, T, O>
impl<M = Const, T = usize, O = Lsb0> !Send for BitPtrRange<M, T, O>
impl<M = Const, T = usize, O = Lsb0> !Sync for BitPtrRange<M, T, O>
impl<M, T, O> Unpin for BitPtrRange<M, T, O>
impl<M, T, O> UnwindSafe for BitPtrRange<M, T, O>
Blanket Implementations§
Source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
Source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Source§impl<T> CloneToUninit for Twhere
T: Clone,
impl<T> CloneToUninit for Twhere
T: Clone,
Source§unsafe fn clone_to_uninit(&self, dst: *mut T)
unsafe fn clone_to_uninit(&self, dst: *mut T)
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