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
.
Implementations§
Source§impl<'g> FeatureQuery<'g>
impl<'g> FeatureQuery<'g>
Sourcepub fn graph(&self) -> &FeatureGraph<'g>
pub fn graph(&self) -> &FeatureGraph<'g>
Returns the feature graph the query is going to be executed on.
Sourcepub fn direction(&self) -> DependencyDirection
pub fn direction(&self) -> DependencyDirection
Returns the direction the query is happening in.
Sourcepub fn initials<'a>(
&'a self,
) -> impl Iterator<Item = FeatureMetadata<'g>> + ExactSizeIterator + 'a
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.
Sourcepub fn initial_packages<'a>(
&'a self,
) -> impl Iterator<Item = PackageMetadata<'g>> + 'a
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.
Sourcepub fn starts_from_package(&self, package_id: &PackageId) -> Result<bool, Error>
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.
Sourcepub fn starts_from<'a>(
&self,
feature_id: impl Into<FeatureId<'a>>,
) -> Result<bool, Error>
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.
Sourcepub fn resolve(self) -> FeatureSet<'g>
pub fn resolve(self) -> FeatureSet<'g>
Resolves this query into a set of known feature IDs.
This is the entry point for iterators.
Sourcepub fn resolve_with(self, resolver: impl FeatureResolver<'g>) -> FeatureSet<'g>
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.
Sourcepub fn resolve_with_fn(
self,
resolver_fn: impl FnMut(&FeatureQuery<'g>, ConditionalLink<'g>) -> bool,
) -> FeatureSet<'g>
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§
Source§impl<'g> Clone for FeatureQuery<'g>
impl<'g> Clone for FeatureQuery<'g>
Source§fn clone(&self) -> FeatureQuery<'g>
fn clone(&self) -> FeatureQuery<'g>
1.0.0 · Source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moreAuto Trait Implementations§
impl<'g> Freeze for FeatureQuery<'g>
impl<'g> RefUnwindSafe for FeatureQuery<'g>
impl<'g> Send for FeatureQuery<'g>
impl<'g> Sync for FeatureQuery<'g>
impl<'g> Unpin for FeatureQuery<'g>
impl<'g> UnwindSafe for FeatureQuery<'g>
Blanket Implementations§
Source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
Source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Source§impl<T> CloneToUninit for Twhere
T: Clone,
impl<T> CloneToUninit for Twhere
T: Clone,
Source§unsafe fn clone_to_uninit(&self, dst: *mut T)
unsafe fn clone_to_uninit(&self, dst: *mut T)
clone_to_uninit
)