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PyComparisonOp

rustpython_vm::types

Struct PyComparisonOp 

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pub struct PyComparisonOp(/* private fields */);

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impl PyComparisonOp

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pub const Lt: Self

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pub const Gt: Self

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pub const Ne: Self

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pub const Eq: Self

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pub const Le: Self

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pub const Ge: Self

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impl PyComparisonOp

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pub fn eq_only( self, f: impl FnOnce() -> PyResult<PyComparisonValue>, ) -> PyResult<PyComparisonValue>

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pub fn eval_ord(self, ord: Ordering) -> bool

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pub const fn swapped(self) -> Self

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pub fn method_name(self, ctx: &Context) -> &'static PyStrInterned

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pub const fn operator_token(self) -> &'static str

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pub fn identical_optimization( self, a: &impl Borrow<PyObject>, b: &impl Borrow<PyObject>, ) -> Option<bool>

Returns an appropriate return value for the comparison when a and b are the same object, if an appropriate return value exists.

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pub fn eval_eq(self, equal: impl FnOnce() -> bool) -> Option<bool>

The answer to this comparison for two operands that equal reports as equal or not, or None for an ordering operator, which equality alone cannot settle – equal is not called in that case.

This is what lets a type answer == and != with an equality test rather than with an ordering: the two agree on the answer, but equality can settle a length mismatch without looking at the contents at all.

The two neighbouring helpers answer different questions: Self::map_eq answers only where its predicate holds, so a caller still handles the other side, and Self::eq_only declares the comparison NotImplemented for an ordering operator. This one leaves the ordering operators to the caller, which is what a type with a real ordering needs.

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pub fn map_eq(self, f: impl FnOnce() -> bool) -> Option<bool>

Returns Some(true) when self is Eq and f() returns true. Returns Some(false) when self is Ne and f() returns true. Otherwise returns None.

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impl Clone for PyComparisonOp

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fn clone(&self) -> Self

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 Copy for PyComparisonOp

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impl Debug for PyComparisonOp

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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 Eq for PyComparisonOp

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impl From<ComparisonOperator> for PyComparisonOp

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fn from(op: ComparisonOperator) -> Self

Converts to this type from the input type.
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impl PartialEq for PyComparisonOp

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

Equality operator ==. Read more
1.0.0 (const: unstable) · Source§

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

Inequality operator !=. Read more
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impl StructuralPartialEq for PyComparisonOp

Auto Trait Implementations§

Blanket Implementations§

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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> 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<ST, DT> CastableFrom<ST, Initialized, Initialized> for DT
where ST: ?Sized, DT: ?Sized,

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impl<ST, DT> CastableFrom<ST, Uninit, Uninit> for DT
where ST: ?Sized, DT: ?Sized,

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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> ErasedDestructor for T
where T: 'static,

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impl<T, U> ExactFrom<T> for U
where U: TryFrom<T>,

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fn exact_from(value: T) -> U

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impl<T, U> ExactInto<U> for T
where U: ExactFrom<T>,

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fn exact_into(self) -> U

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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> Helper for T

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impl<T, U> ImaginaryInto<U> for T
where U: ImaginaryFrom<T>,

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fn imaginary_into(self) -> U

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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, U> OverflowingInto<U> for T
where U: OverflowingFrom<T>,

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fn overflowing_into(self) -> (U, bool)

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impl<T> PrimitiveIntRandomBounds for T

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impl<T> PrimitiveSignedRandomBounds for T

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impl<T> PyThreadingConstraint for T

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impl<T> Read<Exclusive, BecauseExclusive> for T
where T: ?Sized,

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impl<T, U> RoundingInto<U> for T
where U: RoundingFrom<T>,

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fn rounding_into(self, rm: RoundingMode) -> (U, Ordering)

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impl<T, U> SaturatingInto<U> for T
where U: SaturatingFrom<T>,

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fn saturating_into(self) -> U

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impl<T> ToDebugString for T
where T: Debug,

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fn to_debug_string(&self) -> String

Returns the String produced by Ts Debug implementation.

§Examples
use malachite_base::strings::ToDebugString;

assert_eq!([1, 2, 3].to_debug_string(), "[1, 2, 3]");
assert_eq!(
    [vec![2, 3], vec![], vec![4]].to_debug_string(),
    "[[2, 3], [], [4]]"
);
assert_eq!(Some(5).to_debug_string(), "Some(5)");
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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 = !

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

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<T, U> WrappingInto<U> for T
where U: WrappingFrom<T>,

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fn wrapping_into(self) -> U