Enum rustc_mir_build::thir::pattern::deconstruct_pat::MaybeInfiniteInt

pub(crate) enum MaybeInfiniteInt {
    NegInfinity,
    Finite(u128),
    JustAfterMax,
    PosInfinity,
}

A possibly infinite integer. Values are encoded such that the ordering on u128 matches the natural order on the original type. For example, -128i8 is encoded as 0 and 127i8 as 255. See signed_bias for details.

Variants

NegInfinity

Finite(u128)

Encoded value. DO NOT CONSTRUCT BY HAND; use new_finite.

JustAfterMax

The integer after u128::MAX. We need it to represent x..=u128::MAX as an exclusive range.

PosInfinity

Implementations

impl MaybeInfiniteInt

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

fn new_finite(tcx: TyCtxt<'_>, ty: Ty<'_>, bits: u128) -> Self

fn from_pat_range_bdy<'tcx>( bdy: PatRangeBoundary<'tcx>, ty: Ty<'tcx>, tcx: TyCtxt<'tcx>, param_env: ParamEnv<'tcx> ) -> Self

fn to_diagnostic_pat_range_bdy<'tcx>( self, ty: Ty<'tcx>, tcx: TyCtxt<'tcx> ) -> PatRangeBoundary<'tcx>

Used only for diagnostics. Note: it is possible to get isize/usize::MAX+1 here, as explained in the doc for IntRange::split. This cannot be represented as a Const, so we represent it with PosInfinity.

pub(crate) fn minus_one(self) -> Self

Note: this will not turn a finite value into an infinite one or vice-versa.

pub(crate) fn plus_one(self) -> Self

Note: this will not turn a finite value into an infinite one or vice-versa.

Trait Implementations

impl Clone for MaybeInfiniteInt

fn clone(&self) -> MaybeInfiniteInt

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for MaybeInfiniteInt

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

Formats the value using the given formatter.

impl Ord for MaybeInfiniteInt

fn cmp(&self, other: &MaybeInfiniteInt) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized + PartialOrd,

Restrict a value to a certain interval.

impl PartialEq for MaybeInfiniteInt

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

This method tests for self and other values to be equal, and is used by ==.

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.

impl PartialOrd for MaybeInfiniteInt

fn partial_cmp(&self, other: &MaybeInfiniteInt) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

This method tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

This method tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

This method tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

This method tests greater than or equal to (for self and other) and is used by the >= operator.

impl Copy for MaybeInfiniteInt

impl Eq for MaybeInfiniteInt

impl StructuralEq for MaybeInfiniteInt

impl StructuralPartialEq for MaybeInfiniteInt

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: 24 bytes

Size for each variant:

• NegInfinity: 0 bytes
• Finite: 16 bytes
• JustAfterMax: 0 bytes
• PosInfinity: 0 bytes