hassium_core::ecs::shred

Struct Fetch

pub struct Fetch<'a, T>where
    T: 'a,
{ /* private fields */ }

Expand description

Allows to fetch a resource in a system immutably.

If the resource isn’t strictly required, you should use Option<Fetch<T>>.

§Type parameters

T: The type of the resource

Trait Implementations§

impl<'a, T, F> From<Fetch<'a, T>> for Read<'a, T, F>

fn from(inner: Fetch<'a, T>) -> Read<'a, T, F>

Converts to this type from the input type.

impl<'a, 'b, T> Join for &'a Fetch<'b, T>
where &'a T: Join, T: Resource,

type Type = <&'a T as Join>::Type

Type of joined components.

type Value = <&'a T as Join>::Value

Type of joined storages.

type Mask = <&'a T as Join>::Mask

Type of joined bit mask.

unsafe fn open( self, ) -> (<&'a Fetch<'b, T> as Join>::Mask, <&'a Fetch<'b, T> as Join>::Value)

Open this join by returning the mask and the storages. Read more

unsafe fn get( v: &mut <&'a Fetch<'b, T> as Join>::Value, i: u32, ) -> <&'a Fetch<'b, T> as Join>::Type

Get a joined component value by a given index.

fn is_unconstrained() -> bool

If this Join typically returns all indices in the mask, then iterating over only it or combined with other joins that are also dangerous will cause the JoinIter/ParJoin to go through all indices which is usually not what is wanted and will kill performance.

fn join(self) -> JoinIter<Self> ⓘ
where Self: Sized,

Create a joined iterator over the contents.

fn maybe(self) -> MaybeJoin<Self>
where Self: Sized,

Returns a Join-able structure that yields all indices, returning None for all missing elements and Some(T) for found elements. Read more

impl<'a, T> Deref for Fetch<'a, T>
where T: Resource,

type Target = T

The resulting type after dereferencing.

fn deref(&self) -> &T

Dereferences the value.

Auto Trait Implementations§

impl<'a, T> Freeze for Fetch<'a, T>

impl<'a, T> !RefUnwindSafe for Fetch<'a, T>

impl<'a, T> Send for Fetch<'a, T>
where T: Sync,

impl<'a, T> Sync for Fetch<'a, T>
where T: Sync,

impl<'a, T> Unpin for Fetch<'a, T>

impl<'a, T> !UnwindSafe for Fetch<'a, T>

Blanket Implementations§

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

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

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

fn get_type_id(&self) -> TypeId

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

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

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

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

Mutably borrows from an owned value. Read more

impl<T> From<T> for T

fn from(t: T) -> T

Returns the argument unchanged.

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

fn into(self) -> U

Calls U::from(self).

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

impl<P, T> Receiver for P
where P: Deref<Target = T> + ?Sized, T: ?Sized,

type Target = T

🔬This is a nightly-only experimental API. (arbitrary_self_types)

The target type on which the method may be called.

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

type Error = Infallible

The type returned in the event of a conversion error.

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

Performs the conversion.

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.

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

Performs the conversion.

impl<T> Erased for T

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

impl<T> Resource for T
where T: Any + Send + Sync,