Enum FeatureValue

pub enum FeatureValue {
    Feature(InternedString),
    Dep {
        dep_name: InternedString,
    },
    DepFeature {
        dep_name: InternedString,
        dep_feature: InternedString,
        weak: bool,
    },
}

FeatureValue represents the types of dependencies a feature can have.

Variants

Feature(InternedString)

A feature enabling another feature.

Dep

A feature enabling a dependency with dep:dep_name syntax.

Fields

dep_name: InternedString

DepFeature

A feature enabling a feature on a dependency with crate_name/feat_name syntax.

Fields

dep_name: InternedString

dep_feature: InternedString

weak: bool

If true, indicates the ? syntax is used, which means this will not automatically enable the dependency unless the dependency is activated through some other means.

Implementations

impl FeatureValue

pub fn new(feature: InternedString) -> FeatureValue

fn explicit_dep_name(&self) -> Option<InternedString>

Returns the name of the dependency if and only if it was explicitly named with the dep: syntax.

fn feature_or_dep_name(&self) -> InternedString

Trait Implementations

impl Clone for FeatureValue

fn clone(&self) -> FeatureValue

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for FeatureValue

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

Formats the value using the given formatter.

impl Display for FeatureValue

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

Formats the value using the given formatter.

impl Hash for FeatureValue

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 FeatureValue

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

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

fn partial_cmp(&self, other: &FeatureValue) -> 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 Eq for FeatureValue

impl StructuralPartialEq for FeatureValue

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: 40 bytes

Size for each variant:

• Feature: 23 bytes
• Dep: 23 bytes
• DepFeature: 39 bytes