Struct despero::ecs::QueryOne

pub struct QueryOne<'a, Q>where
    Q: Query,{ /* private fields */ }

Expand description

Wraps the bulting QueryOne with a Result containing the entity and component instead of option

Implementations§

impl<'a, Q> QueryOne<'a, Q>where Q: Query,

pub fn get(&mut self) -> Result<<Q as Query>::Item<'_>, Error>

Get the query result, or return an error if the entity does not satisfy the query

Must be called at most once.

Panics if called more than once or if it would construct a borrow that clashes with another pre-existing borrow.

Auto Trait Implementations§

impl<'a, Q> RefUnwindSafe for QueryOne<'a, Q>where Q: RefUnwindSafe,

impl<'a, Q> Send for QueryOne<'a, Q>

impl<'a, Q> Sync for QueryOne<'a, Q>

impl<'a, Q> Unpin for QueryOne<'a, Q>where Q: Unpin,

impl<'a, Q> UnwindSafe for QueryOne<'a, Q>where Q: UnwindSafe,

Blanket Implementations§

impl<T> Any for Twhere T: 'static + ?Sized,

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Immutably borrows from an owned value. Read more

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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.

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fn instrument(self, span: Span) -> Instrumented<Self>

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const ALIGN: usize = mem::align_of::<T>()

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type Init = T

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unsafe fn init(init: <T as Pointable>::Init) -> usize

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