pub(crate) struct IntRange {
    range: RangeInclusive<u128>,
}
Expand description

An inclusive interval, used for precise integer exhaustiveness checking. IntRanges always store a contiguous range. This means that values are encoded such that 0 encodes the minimum value for the integer, regardless of the signedness. For example, the pattern -128..=127i8 is encoded as 0..=255. This makes comparisons and arithmetic on interval endpoints much more straightforward. See signed_bias for details.

IntRange is never used to encode an empty range or a “range” that wraps around the (offset) space: i.e., range.lo <= range.hi.

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§range: RangeInclusive<u128>

Implementations§

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impl IntRange

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fn is_integral(ty: Ty<'_>) -> bool

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fn is_singleton(&self) -> bool

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fn boundaries(&self) -> (u128, u128)

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fn from_bits<'tcx>(tcx: TyCtxt<'tcx>, ty: Ty<'tcx>, bits: u128) -> IntRange

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fn from_range<'tcx>( tcx: TyCtxt<'tcx>, lo: u128, hi: u128, ty: Ty<'tcx>, end: RangeEnd ) -> IntRange

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fn signed_bias(tcx: TyCtxt<'_>, ty: Ty<'_>) -> u128

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fn is_subrange(&self, other: &Self) -> bool

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fn intersection(&self, other: &Self) -> Option<Self>

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fn suspicious_intersection(&self, other: &Self) -> bool

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fn to_pat<'tcx>(&self, tcx: TyCtxt<'tcx>, ty: Ty<'tcx>) -> Pat<'tcx>

Only used for displaying the range properly.

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pub(super) fn lint_overlapping_range_endpoints<'a, 'p: 'a, 'tcx: 'a>( &self, pcx: &PatCtxt<'_, 'p, 'tcx>, pats: impl Iterator<Item = &'a DeconstructedPat<'p, 'tcx>>, column_count: usize, lint_root: HirId )

Lint on likely incorrect range patterns (#63987)

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fn is_covered_by(&self, other: &Self) -> bool

See Constructor::is_covered_by

Trait Implementations§

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impl Clone for IntRange

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fn clone(&self) -> IntRange

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for IntRange

Note: this is often not what we want: e.g. false is converted into the range 0..=0 and would be displayed as such. To render properly, convert to a pattern first.

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

Formats the value using the given formatter. Read more
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impl PartialEq<IntRange> for IntRange

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

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

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl Eq for IntRange

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impl StructuralEq for IntRange

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impl StructuralPartialEq for IntRange

Auto Trait Implementations§

Blanket Implementations§

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impl<T> Any for Twhere 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> Borrow<T> for Twhere 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 Twhere 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> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for Twhere 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> ToOwned for Twhere 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 Twhere 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 Twhere 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.

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: 48 bytes