Struct guppy::graph::feature::FeatureId

source · [−]

pub struct FeatureId<'g> { /* private fields */ }

Expand description

An identifier for a (package, feature) pair in a feature graph.

Returned by various methods on FeatureGraph and FeatureQuery.

From impls are available for (&'g PackageId, &'g str) and (&'g PackageId, Option<&'g str>) tuples.

Implementations

impl<'g> FeatureId<'g>

pub fn new(package_id: &'g PackageId, label: FeatureLabel<'g>) -> Self

Creates a new FeatureId with the given PackageId and FeatureLabel.

pub fn named(package_id: &'g PackageId, feature_name: &'g str) -> Self

Creates a new FeatureId representing a named feature in the [features] section, or an implicit named feature created by an optional dependency.

pub fn optional_dependency(package_id: &'g PackageId, dep_name: &'g str) -> Self

Creates a new FeatureId representing an optional dependency.

pub fn base(package_id: &'g PackageId) -> Self

Creates a new FeatureId representing the base feature for a package.

pub fn package_id(&self) -> &'g PackageId

Returns the package ID.

pub fn label(&self) -> FeatureLabel<'g>

Returns the FeatureLabel associated with the feature.

pub fn is_base(&self) -> bool

Returns true if this is the base feature for the package.

pub fn is_optional_dependency(self) -> bool

Returns true if this is an optional dependency.

pub fn is_named(self) -> bool

Returns true if this is a named feature.

Trait Implementations

impl<'g> Clone for FeatureId<'g>

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

Returns a copy of the value. Read more

1.0.0 · source

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

Performs copy-assignment from source. Read more

impl<'g> Debug for FeatureId<'g>

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

Formats the value using the given formatter. Read more

impl<'g> Display for FeatureId<'g>

The Display impl prints out:

{package-id}/[base] for base features.
{package-id}/feature-name for named features.
{package-id}/dep:dep-name for optional dependencies.

Examples

use guppy::PackageId;
use guppy::graph::feature::FeatureId;

let package_id = PackageId::new("region 2.1.2 (registry+https://github.com/rust-lang/crates.io-index)");

assert_eq!(
    format!("{}", FeatureId::base(&package_id)),
    "region 2.1.2 (registry+https://github.com/rust-lang/crates.io-index)/[base]"
);

assert_eq!(
    format!("{}", FeatureId::named(&package_id, "foo")),
    "region 2.1.2 (registry+https://github.com/rust-lang/crates.io-index)/foo"
);

assert_eq!(
    format!("{}", FeatureId::optional_dependency(&package_id, "bar")),
    "region 2.1.2 (registry+https://github.com/rust-lang/crates.io-index)/dep:bar"
);

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

Formats the value using the given formatter. Read more

impl<'g> From<(&'g PackageId, FeatureLabel<'g>)> for FeatureId<'g>

fn from((package_id, label): (&'g PackageId, FeatureLabel<'g>)) -> Self

Performs the conversion.

impl<'g> Hash for FeatureId<'g>

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

Feeds this value into the given Hasher. Read more

1.3.0 · source

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

Feeds a slice of this type into the given Hasher. Read more

impl<'g> Ord for FeatureId<'g>

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

This method returns an Ordering between self and other. Read more

1.21.0 · source

fn max(self, other: Self) -> Self

Compares and returns the maximum of two values. Read more

1.21.0 · source

fn min(self, other: Self) -> Self

Compares and returns the minimum of two values. Read more

1.50.0 · source

fn clamp(self, min: Self, max: Self) -> Self

Restrict a value to a certain interval. Read more

impl<'g> PartialEq<FeatureId<'g>> for FeatureId<'g>

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

This method tests for self and other values to be equal, and is used by ==. Read more

fn ne(&self, other: &FeatureId<'g>) -> bool

This method tests for !=.

impl<'g> PartialOrd<FeatureId<'g>> for FeatureId<'g>

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

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

1.0.0 · source

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

This method tests less than (for self and other) and is used by the < operator. Read more

1.0.0 · source

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

This method tests less than or equal to (for self and other) and is used by the <= operator. Read more

1.0.0 · source

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

This method tests greater than (for self and other) and is used by the > operator. Read more

1.0.0 · source

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

This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more

impl<'g> Copy for FeatureId<'g>

impl<'g> Eq for FeatureId<'g>

impl<'g> StructuralEq for FeatureId<'g>

impl<'g> StructuralPartialEq for FeatureId<'g>

Auto Trait Implementations

impl<'g> RefUnwindSafe for FeatureId<'g>

impl<'g> Send for FeatureId<'g>

impl<'g> Sync for FeatureId<'g>

impl<'g> Unpin for FeatureId<'g>

impl<'g> UnwindSafe for FeatureId<'g>

Blanket Implementations

impl<T> Any for T where
T: 'static + ?Sized,

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

impl<T> Borrow<T> for T where
T: ?Sized,

const: unstable · source

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

impl<T> BorrowMut<T> for T where
T: ?Sized,

const: unstable · source

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more

impl<Q, K> Equivalent<K> for Q where
Q: Eq + ?Sized,
K: Borrow<Q> + ?Sized,

fn equivalent(&self, key: &K) -> bool

Compare self to key and return true if they are equal.

impl<T> From<T> for T

const: unstable · source

fn from(t: T) -> T

Returns the argument unchanged.

impl<T, U> Into<U> for T where
U: From<T>,

const: unstable · source

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

impl<T> Pointable for T

const ALIGN: usize

The alignment of pointer.

type Init = T

The type for initializers.

unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more

unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more

unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more

unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more

impl<T> ToOwned for T where
T: Clone,

type Owned = T

The resulting type after obtaining ownership.

fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more

fn clone_into(&self, target: &mut T)

🔬 This is a nightly-only experimental API. (toowned_clone_into)

Uses borrowed data to replace owned data, usually by cloning. Read more

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

default fn to_string(&self) -> String

Converts the given value to a String. Read more

impl<T, U> TryFrom<U> for T where
U: Into<T>,

type Error = Infallible

The type returned in the event of a conversion error.

const: unstable · source

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.

impl<T, U> TryInto<U> for T where
U: TryFrom<T>,

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.

const: unstable · source

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.

impl<V, T> VZip<V> for T where
V: MultiLane<T>,

fn vzip(self) -> V