Struct hecs::PreparedQuery
source · pub struct PreparedQuery<Q: Query> { /* private fields */ }
Expand description
A prepared query can be stored independently of the World
to amortize query set-up costs.
Implementations§
source§impl<Q: Query> PreparedQuery<Q>
impl<Q: Query> PreparedQuery<Q>
sourcepub fn query<'q>(&'q mut self, world: &'q World) -> PreparedQueryBorrow<'q, Q>
pub fn query<'q>(&'q mut self, world: &'q World) -> PreparedQueryBorrow<'q, Q>
Query world
, using dynamic borrow checking
This will panic if it would violate an existing unique reference or construct an invalid unique reference.
sourcepub fn query_mut<'q>(
&'q mut self,
world: &'q mut World
) -> PreparedQueryIter<'q, Q> ⓘ
pub fn query_mut<'q>(
&'q mut self,
world: &'q mut World
) -> PreparedQueryIter<'q, Q> ⓘ
Query a uniquely borrowed world
Avoids the cost of the dynamic borrow checking performed by query
.
sourcepub fn view_mut<'q>(&'q mut self, world: &'q mut World) -> PreparedView<'q, Q>
pub fn view_mut<'q>(&'q mut self, world: &'q mut World) -> PreparedView<'q, Q>
Provide random access to query results for a uniquely borrow world