Enum guppy::graph::feature::FeatureLabel

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pub enum FeatureLabel<'g> {
    Base,
    Named(&'g str),
    OptionalDependency(&'g str),
}
Expand description

A unique identifier for a feature within a specific package. Forms part of a FeatureId.

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Base

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

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Named(&'g str)

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.

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OptionalDependency(&'g str)

This is an optional dependency.

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impl<'g> FeatureLabel<'g>

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pub fn kind(self) -> FeatureKind

Returns the kind of feature this is.

The kind of a feature is simply the enum variant without any associated data.

Trait Implementations§

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impl<'g> Clone for FeatureLabel<'g>

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fn clone(&self) -> FeatureLabel<'g>

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl<'g> Debug for FeatureLabel<'g>

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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<'g> Display for FeatureLabel<'g>

The Display impl for FeatureLabel prints out:

  • [base] for base labels.
  • feature-name for optional dependencies.
  • dep:dep-name for named features.
§Examples
use guppy::graph::feature::FeatureLabel;

assert_eq!(format!("{}", FeatureLabel::Base), "[base]");
assert_eq!(format!("{}", FeatureLabel::Named("foo")), "foo");
assert_eq!(format!("{}", FeatureLabel::OptionalDependency("bar")), "dep:bar");
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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<'g> Hash for FeatureLabel<'g>

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

Feeds this value into the given Hasher. Read more
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fn hash_slice<H>(data: &[Self], state: &mut H)
where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher. Read more
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impl<'g> Ord for FeatureLabel<'g>

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fn cmp(&self, other: &FeatureLabel<'g>) -> Ordering

This method returns an Ordering between self and other. Read more
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fn max(self, other: Self) -> Self
where Self: Sized,

Compares and returns the maximum of two values. Read more
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fn min(self, other: Self) -> Self
where Self: Sized,

Compares and returns the minimum of two values. Read more
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fn clamp(self, min: Self, max: Self) -> Self
where Self: Sized + PartialOrd,

Restrict a value to a certain interval. Read more
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impl<'g> PartialEq for FeatureLabel<'g>

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fn eq(&self, other: &FeatureLabel<'g>) -> bool

Tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl<'g> PartialOrd for FeatureLabel<'g>

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fn partial_cmp(&self, other: &FeatureLabel<'g>) -> Option<Ordering>

This method returns an ordering between self and other values if one exists. Read more
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fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator. Read more
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fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator. Read more
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fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator. Read more
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fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by the >= operator. Read more
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impl<'g> Copy for FeatureLabel<'g>

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impl<'g> Eq for FeatureLabel<'g>

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impl<'g> StructuralPartialEq for FeatureLabel<'g>

Auto Trait Implementations§

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impl<'g> Freeze for FeatureLabel<'g>

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impl<'g> RefUnwindSafe for FeatureLabel<'g>

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impl<'g> Send for FeatureLabel<'g>

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impl<'g> Sync for FeatureLabel<'g>

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impl<'g> Unpin for FeatureLabel<'g>

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impl<'g> UnwindSafe for FeatureLabel<'g>

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<T> CloneToUninit for T
where T: Clone,

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default unsafe fn clone_to_uninit(&self, dst: *mut T)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dst. Read more
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impl<T> CloneToUninit for T
where T: Copy,

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unsafe fn clone_to_uninit(&self, dst: *mut T)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dst. Read more
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impl<Q, K> Comparable<K> for Q
where Q: Ord + ?Sized, K: Borrow<Q> + ?Sized,

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fn compare(&self, key: &K) -> Ordering

Compare self to key and return their ordering.
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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> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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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> 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> ToString for T
where T: Display + ?Sized,

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default fn to_string(&self) -> String

Converts the given value to a String. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

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

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.