Struct guppy::graph::feature::FeatureQuery

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pub struct FeatureQuery<'g> { /* private fields */ }
Expand description

A query over a feature graph.

A FeatureQuery is the entry point for Cargo resolution, and also provides iterators over feature IDs and links. This struct is constructed through the query_ methods on FeatureGraph, or through PackageQuery::to_feature_query.

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impl<'g> FeatureQuery<'g>

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pub fn graph(&self) -> &FeatureGraph<'g>

Returns the feature graph the query is going to be executed on.

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pub fn direction(&self) -> DependencyDirection

Returns the direction the query is happening in.

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pub fn initials<'a>( &'a self, ) -> impl Iterator<Item = FeatureMetadata<'g>> + ExactSizeIterator + 'a

Returns the list of initial features specified in the query.

The order of features is unspecified.

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pub fn initial_packages<'a>( &'a self, ) -> impl Iterator<Item = PackageMetadata<'g>> + 'a

Returns the list of initial packages specified in the query.

The order of packages is unspecified.

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pub fn starts_from_package(&self, package_id: &PackageId) -> Result<bool, Error>

Returns true if the query starts from the given package.

Returns an error if the package ID is unknown.

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pub fn starts_from<'a>( &self, feature_id: impl Into<FeatureId<'a>>, ) -> Result<bool, Error>

Returns true if the query starts from the given feature ID.

Returns an error if this feature ID is unknown.

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pub fn resolve(self) -> FeatureSet<'g>

Resolves this query into a set of known feature IDs.

This is the entry point for iterators.

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pub fn resolve_with(self, resolver: impl FeatureResolver<'g>) -> FeatureSet<'g>

Resolves this query into a set of known feature IDs, using the provided resolver to determine which links are followed.

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pub fn resolve_with_fn( self, resolver_fn: impl FnMut(&FeatureQuery<'g>, ConditionalLink<'g>) -> bool, ) -> FeatureSet<'g>

Resolves this query into a set of known feature IDs, using the provided resolver function to determine which links are followed.

Trait Implementations§

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impl<'g> Clone for FeatureQuery<'g>

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

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

Formats the value using the given formatter. Read more

Auto Trait Implementations§

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impl<'g> Freeze for FeatureQuery<'g>

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impl<'g> RefUnwindSafe for FeatureQuery<'g>

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impl<'g> Send for FeatureQuery<'g>

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impl<'g> Sync for FeatureQuery<'g>

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impl<'g> Unpin for FeatureQuery<'g>

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impl<'g> UnwindSafe for FeatureQuery<'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> 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, 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.