Struct UniversalMarker 

pub struct UniversalMarker { /* private fields */ }

A representation of a marker for use in universal resolution.

(This degrades gracefully to a standard PEP 508 marker in the case of non-universal resolution.)

This universal marker is meant to combine both a PEP 508 marker and a marker for conflicting extras/groups. The latter specifically expresses whether a particular edge in a dependency graph should be followed depending on the activated extras and groups.

A universal marker evaluates to true only when both its PEP 508 marker and its conflict marker evaluate to true.

Implementations

impl UniversalMarker

pub fn combined(self) -> MarkerTree

Returns the internal marker that combines both the PEP 508 and conflict marker.

pub fn pep508(self) -> MarkerTree

Returns the PEP 508 marker for this universal marker.

One should be cautious using this. Generally speaking, it should only be used when one knows universal resolution isn’t in effect. When universal resolution is enabled (i.e., there may be multiple forks producing different versions of the same package), then one should always use a universal marker since it accounts for all possible ways for a package to be installed.

Trait Implementations

impl Clone for UniversalMarker

fn clone(&self) -> UniversalMarker

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for UniversalMarker

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

Formats the value using the given formatter.

impl Default for UniversalMarker

fn default() -> UniversalMarker

Returns the “default value” for a type.

impl Hash for UniversalMarker

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 UniversalMarker

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

fn eq(&self, other: &UniversalMarker) -> 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 UniversalMarker

fn partial_cmp(&self, other: &UniversalMarker) -> 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 UniversalMarker

impl Eq for UniversalMarker

impl StructuralPartialEq for UniversalMarker