Struct oxygengine_core::ecs::PreparedQuery

pub struct PreparedQuery<Q> where
    Q: Query,  { /* fields omitted */ }

A prepared query can be stored independently of the World to amortize query set-up costs.

Implementations

impl<Q> PreparedQuery<Q> where
    Q: Query, 

pub fn new() -> PreparedQuery<Q>

Create a prepared query which is not yet attached to any world

pub fn query(&'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.

pub fn query_mut(&'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.

Trait Implementations

impl<Q> Default for PreparedQuery<Q> where
    Q: Query, 

pub fn default() -> PreparedQuery<Q>

Returns the “default value” for a type.