Enum Operator 

pub enum Operator {
    Equal,
    EqualStar,
    ExactEqual,
    NotEqual,
    NotEqualStar,
    TildeEqual,
    LessThan,
    LessThanEqual,
    GreaterThan,
    GreaterThanEqual,
}

One of ~= == != <= >= < > ===

Variants

Equal

== 1.2.3

EqualStar

== 1.2.*

ExactEqual

=== (discouraged)

https://peps.python.org/pep-0440/#arbitrary-equality

“Use of this operator is heavily discouraged and tooling MAY display a warning when it is used”

NotEqual

!= 1.2.3

NotEqualStar

!= 1.2.*

TildeEqual

~=

Invariant: With ~=, there are always at least 2 release segments.

LessThan

<

LessThanEqual

<=

GreaterThan

>

GreaterThanEqual

>=

Implementations

impl Operator

pub fn negate(self) -> Option<Self>

Negates this operator, if a negation exists, so that it has the opposite meaning.

This returns a negated operator in every case except for the ~= operator. In that case, None is returned and callers may need to handle its negation at a higher level. (For example, if it’s negated in the context of a marker expression, then the “compatible” version constraint can be split into its component parts and turned into a disjunction of the negation of each of those parts.)

Note that this routine is not reversible in all cases. For example Operator::ExactEqual negates to Operator::NotEqual, and Operator::NotEqual in turn negates to Operator::Equal.

pub fn is_star(self) -> bool

Returns true if this operator represents a wildcard.

pub fn as_str(self) -> &'static str

Returns the string representation of this operator.

Trait Implementations

impl Clone for Operator

fn clone(&self) -> Operator

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Operator

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

Formats the value using the given formatter.

impl Display for Operator

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

Note the EqualStar is also ==.

impl FromStr for Operator

fn from_str(s: &str) -> Result<Self, Self::Err>

Notably, this does not know about star versions, it just assumes the base operator

type Err = OperatorParseError

The associated error which can be returned from parsing.

impl Hash for Operator

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

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for Operator

fn cmp(&self, other: &Operator) -> 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,

Restrict a value to a certain interval.

impl PartialEq for Operator

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

Tests for self and other values to be equal, and is used by ==.

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

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

impl PartialOrd for Operator

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

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

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

Tests less than (for self and other) and is used by the < operator.

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

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

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

Tests greater than (for self and other) and is used by the > operator.

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

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

impl Copy for Operator

impl Eq for Operator

impl StructuralPartialEq for Operator