Struct flatbox_ecs::QueryOne

source · 
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§

source§

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

source

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> Freeze for QueryOne<'a, Q>

§

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§

source§

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

source§

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
source§

impl<T> AsAny for T
where T: Any,

source§

fn as_any(&self) -> &(dyn Any + 'static)

source§

fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)

source§

fn type_name(&self) -> &'static str

Gets the type name of self
source§

impl<T> Borrow<T> for T
where T: ?Sized,

source§

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
source§

impl<T> BorrowMut<T> for T
where T: ?Sized,

source§

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
source§

impl<T> Downcast for T
where T: AsAny + ?Sized,

source§

fn is<T>(&self) -> bool
where T: AsAny,

Returns true if the boxed type is the same as T. Read more
source§

fn downcast_ref<T>(&self) -> Option<&T>
where T: AsAny,

Forward to the method defined on the type Any.
source§

fn downcast_mut<T>(&mut self) -> Option<&mut T>
where T: AsAny,

Forward to the method defined on the type Any.
source§

impl<T> From<T> for T

source§

fn from(t: T) -> T

Returns the argument unchanged.

source§

impl<T, U> Into<U> for T
where U: From<T>,

source§

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

source§

impl<T> Pointable for T

source§

const ALIGN: usize = _

The alignment of pointer.
§

type Init = T

The type for initializers.
source§

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

Initializes a with the given initializer. Read more
source§

unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more
source§

unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more
source§

unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more
source§

impl<T> Same for T

§

type Output = T

Should always be Self
source§

impl<SS, SP> SupersetOf<SS> for SP
where SS: SubsetOf<SP>,

source§

fn to_subset(&self) -> Option<SS>

The inverse inclusion map: attempts to construct self from the equivalent element of its superset. Read more
source§

fn is_in_subset(&self) -> bool

Checks if self is actually part of its subset T (and can be converted to it).
source§

fn to_subset_unchecked(&self) -> SS

Use with care! Same as self.to_subset but without any property checks. Always succeeds.
source§

fn from_subset(element: &SS) -> SP

The inclusion map: converts self to the equivalent element of its superset.
source§

impl<T, U> TryFrom<U> for T
where U: Into<T>,

§

type Error = Infallible

The type returned in the event of a conversion error.
source§

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
source§

impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

§

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
source§

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
source§

impl<T> Component for T
where T: Send + Sync + 'static,