Struct tantivy::query::EmptyWeight
source · pub struct EmptyWeight;
Expand description
EmptyWeight
is a dummy Weight
in which no document matches.
It is useful for tests and handling edge cases.
Trait Implementations§
source§impl Weight for EmptyWeight
impl Weight for EmptyWeight
source§fn scorer(
&self,
_reader: &SegmentReader,
_boost: Score
) -> Result<Box<dyn Scorer>>
fn scorer( &self, _reader: &SegmentReader, _boost: Score ) -> Result<Box<dyn Scorer>>
Returns the scorer for the given segment. Read more
source§fn explain(&self, _reader: &SegmentReader, doc: DocId) -> Result<Explanation>
fn explain(&self, _reader: &SegmentReader, doc: DocId) -> Result<Explanation>
Returns an
Explanation
for the given document.source§fn count(&self, reader: &SegmentReader) -> Result<u32>
fn count(&self, reader: &SegmentReader) -> Result<u32>
Returns the number documents within the given
SegmentReader
.source§fn for_each(
&self,
reader: &SegmentReader,
callback: &mut dyn FnMut(DocId, Score)
) -> Result<()>
fn for_each( &self, reader: &SegmentReader, callback: &mut dyn FnMut(DocId, Score) ) -> Result<()>
Iterates through all of the document matched by the DocSet
DocSet
and push the scored documents to the collector.source§fn for_each_no_score(
&self,
reader: &SegmentReader,
callback: &mut dyn FnMut(&[DocId])
) -> Result<()>
fn for_each_no_score( &self, reader: &SegmentReader, callback: &mut dyn FnMut(&[DocId]) ) -> Result<()>
Iterates through all of the document matched by the DocSet
DocSet
and push the scored documents to the collector.Auto Trait Implementations§
impl Freeze for EmptyWeight
impl RefUnwindSafe for EmptyWeight
impl Send for EmptyWeight
impl Sync for EmptyWeight
impl Unpin for EmptyWeight
impl UnwindSafe for EmptyWeight
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
Mutably borrows from an owned value. Read more
source§impl<T> Downcast for Twhere
T: Any,
impl<T> Downcast for Twhere
T: Any,
source§fn into_any(self: Box<T>) -> Box<dyn Any>
fn into_any(self: Box<T>) -> Box<dyn Any>
Convert
Box<dyn Trait>
(where Trait: Downcast
) to Box<dyn Any>
. Box<dyn Any>
can
then be further downcast
into Box<ConcreteType>
where ConcreteType
implements Trait
.source§fn into_any_rc(self: Rc<T>) -> Rc<dyn Any>
fn into_any_rc(self: Rc<T>) -> Rc<dyn Any>
Convert
Rc<Trait>
(where Trait: Downcast
) to Rc<Any>
. Rc<Any>
can then be
further downcast
into Rc<ConcreteType>
where ConcreteType
implements Trait
.source§fn as_any(&self) -> &(dyn Any + 'static)
fn as_any(&self) -> &(dyn Any + 'static)
Convert
&Trait
(where Trait: Downcast
) to &Any
. This is needed since Rust cannot
generate &Any
’s vtable from &Trait
’s.source§fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)
fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)
Convert
&mut Trait
(where Trait: Downcast
) to &Any
. This is needed since Rust cannot
generate &mut Any
’s vtable from &mut Trait
’s.