WrappingRange in rustc_abi - Rust
Description: Inclusive wrap-around range of valid values, that is, if start > end, it represents `start..=MAX`, followed by `0..=end`.

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## WrappingRange

# Struct WrappingRange

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    pub struct WrappingRange {
        pub start: u128,
        pub end: u128,
    }

Expand description

Inclusive wrap-around range of valid values, that is, if start > end, it represents `start..=MAX`, followed by `0..=end`.

That is, for an i8 primitive, a range of `254..=2` means following sequence:

254 (-2), 255 (-1), 0, 1, 2

This is intended specifically to mirror LLVM’s `!range` metadata semantics.

## Fields§

§`start: u128`§`end: u128`

## Implementations§

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### impl WrappingRange

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#### pub fn full(size: Size) -> Self

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#### pub fn contains(&self, v: u128) -> bool

Returns `true` if `v` is contained in the range.

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#### pub fn contains_range(&self, other: Self, size: Size) -> bool

Returns `true` if all the values in `other` are contained in this range, when the values are considered as having width `size`.

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#### pub(crate) fn with_start(self, start: u128) -> Self

Returns `self` with replaced `start`

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#### pub(crate) fn with_end(self, end: u128) -> Self

Returns `self` with replaced `end`

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#### pub(crate) fn is_full_for(&self, size: Size) -> bool

Returns `true` if `size` completely fills the range.

Note that this is not the same as `self == WrappingRange::full(size)`. Niche calculations can produce full ranges which are not the canonical one; for example `Option<NonZero<u16>>` gets `valid_range: (..=0) | (1..)`.

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#### pub fn no_unsigned_wraparound(&self, size: Size) -> Result<bool, RangeFull>

Checks whether this range is considered non-wrapping when the values are interpreted as unsigned numbers of width `size`.

Returns `Ok(true)` if there’s no wrap-around, `Ok(false)` if there is, and `Err(..)` if the range is full so it depends how you think about it.

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#### pub fn no_signed_wraparound(&self, size: Size) -> Result<bool, RangeFull>

Checks whether this range is considered non-wrapping when the values are interpreted as signed numbers of width `size`.

This is heavily dependent on the `size`, as `100..=200` does wrap when interpreted as `i8`, but doesn’t when interpreted as `i16`.

Returns `Ok(true)` if there’s no wrap-around, `Ok(false)` if there is, and `Err(..)` if the range is full so it depends how you think about it.

## Trait Implementations§

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### impl Clone for WrappingRange

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#### fn clone(&self) -> WrappingRange

Returns a duplicate of the value. Read more
1.0.0 (const: unstable) · Source§

#### fn clone_from(&mut self, source: &Self)

Performs copy-assignment from `source`. Read more
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### impl Debug for WrappingRange

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#### fn fmt(&self, fmt: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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### impl Hash for WrappingRange

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#### fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given `Hasher`. Read more
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#### fn hash_slice<H>(data: &[Self], state: &mut H)
where H: Hasher, Self: Sized,

Feeds a slice of this type into the given `Hasher`. Read more
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### impl PartialEq for WrappingRange

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#### fn eq(&self, other: &WrappingRange) -> bool

Tests for `self` and `other` values to be equal, and is used by `==`.
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#### fn ne(&self, other: &Rhs) -> bool

Tests for `!=`. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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### impl StableHash for WrappingRange

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#### fn stable_hash<__Hcx: StableHashCtxt>( &self, __hcx: &mut __Hcx, __hasher: &mut StableHasher, )

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### impl Copy for WrappingRange

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### impl Eq for WrappingRange

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### impl StructuralPartialEq for WrappingRange

## Auto Trait Implementations§

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### impl DynSend for WrappingRange

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### impl DynSync for WrappingRange

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### impl Freeze for WrappingRange

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### impl RefUnwindSafe for WrappingRange

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### impl Send for WrappingRange

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### impl Sync for WrappingRange

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### impl Unpin for WrappingRange

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### impl UnsafeUnpin for WrappingRange

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### impl UnwindSafe for WrappingRange

## Blanket Implementations§

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### impl<T> Aligned for T

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#### const ALIGN: Alignment

Alignment of `Self`.
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### impl<T> Any for T
where T: 'static + ?Sized,

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#### fn type_id(&self) -> TypeId

Gets the `TypeId` of `self`. Read more
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### impl<T> AnyEq for T
where T: Any + PartialEq,

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#### fn equals(&self, other: &(dyn Any + 'static)) -> bool

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#### fn as_any(&self) -> &(dyn Any + 'static)

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### impl<T> Borrow<T> for T
where T: ?Sized,

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#### fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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### impl<T> BorrowMut<T> for T
where T: ?Sized,

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#### fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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### impl<T> CloneToUninit for T
where T: Clone,

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#### unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (`clone_to_uninit`)
Performs copy-assignment from `self` to `dest`. Read more
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### impl<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

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#### fn equivalent(&self, key: &K) -> bool

Checks if this value is equivalent to the given key. Read more
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### impl<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

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#### fn equivalent(&self, key: &K) -> bool

Checks if this value is equivalent to the given key. Read more
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### impl<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

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#### fn equivalent(&self, key: &K) -> bool

Compare self to `key` and return `true` if they are equal.
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### impl<T> From<T> for T

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#### fn from(t: T) -> T

Returns the argument unchanged.

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### impl<T> Instrument for T

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#### fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided `Span`, returning an `Instrumented` wrapper. Read more
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#### fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current `Span`, returning an `Instrumented` wrapper. Read more
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### impl<T, U> Into<U> for T
where U: From<T>,

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#### fn into(self) -> U

Calls `U::from(self)`.

That is, this conversion is whatever the implementation of `From<T> for U` chooses to do.

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### impl<T> IntoEither for T

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#### fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts `self` into a `Left` variant of `Either<Self, Self>` if `into_left` is `true`. Converts `self` into a `Right` variant of `Either<Self, Self>` otherwise. Read more
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#### fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts `self` into a `Left` variant of `Either<Self, Self>` if `into_left(&self)` returns `true`. Converts `self` into a `Right` variant of `Either<Self, Self>` otherwise. Read more
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### impl<T> Pointable for T

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#### const ALIGN: usize

The alignment of pointer.
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#### type Init = T

The type for initializers.
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#### unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more
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#### unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more
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#### unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more
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#### unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more
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### impl<T> Same for T

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#### type Output = T

Should always be `Self`
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### impl<T> ToOwned for T
where T: Clone,

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#### type Owned = T

The resulting type after obtaining ownership.
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#### fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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#### fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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### impl<T, U> TryFrom<U> for T
where U: Into<T>,

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#### type Error = Infallible

The type returned in the event of a conversion error.
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#### fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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### impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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#### type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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#### fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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### impl<V, T> VZip<V> for T
where V: MultiLane<T>,

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#### fn vzip(self) -> V

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### impl<T> WithSubscriber for T

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#### fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

Attaches the provided `Subscriber` to this type, returning a `WithDispatch` wrapper. Read more
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#### fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default `Subscriber` to this type, returning a `WithDispatch` wrapper. Read more
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### impl<T> ErasedDestructor for T
where T: 'static,

## Layout§

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain `repr(...)` attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 32 bytes