Enum FeatureKind

pub enum FeatureKind {
    Base,
    Named,
    OptionalDependency,
}

The kind of a particular feature within a package.

Returned by FeatureMetadata.

Variants

Base

The “base” feature. Every package has one such feature.

Named

This is a named feature in the [features] section, or an implicit feature that corresponds to an optional dependency.

For versions of Cargo prior to 1.60, optional dependencies always create implicit features by the same name. For versions 1.60 and greater, optional dependencies may create implicit features if the dependency doesn’t exist with the name “dep” in it.

OptionalDependency

This is an optional dependency.

Implementations

impl FeatureKind

pub fn is_base(self) -> bool

Returns true if this is the base feature.

pub fn is_named(self) -> bool

Returns true if this is a named feature.

pub fn is_optional_dependency(self) -> bool

Returns true if this is an optional dependency.

Trait Implementations

impl Clone for FeatureKind

fn clone(&self) -> FeatureKind

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for FeatureKind

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

Formats the value using the given formatter.

impl Hash for FeatureKind

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 FeatureKind

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

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

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

impl Eq for FeatureKind

impl StructuralPartialEq for FeatureKind