Type Alias ReadExpect

pub type ReadExpect<'a, T> = Read<'a, T, PanicHandler>;

Allows to fetch a resource in a system immutably. This will panic if the resource does not exist. Usage of Read or Option<Read> is therefore recommended.

Aliased Type

struct ReadExpect<'a, T> { /* private fields */ }

Trait Implementations

impl<'a, 'b, T> Join for &'a ReadExpect<'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) -> (Self::Mask, Self::Value)

Open this join by returning the mask and the storages.

unsafe fn get(v: &mut Self::Value, i: Index) -> Self::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 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.

impl<'a, 'b, T> LendJoin for &'a ReadExpect<'b, T>

where &'a T: LendJoin, T: Resource,

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

Type of joined storages.

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

Type of joined bit mask.

unsafe fn open(self) -> (Self::Mask, Self::Value)

Open this join by returning the mask and the storages.

unsafe fn get<'next>( v: &'next mut Self::Value, i: Index, ) -> <Self as LendJoinඞType<'next>>::T

Get a joined component value by a given index.

fn is_unconstrained() -> bool

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

fn lend_join(self) -> JoinLendIter<Self>

where Self: Sized,

Create a joined lending iterator over the contents.

fn maybe(self) -> MaybeJoin<Self>

where Self: Sized,

Returns a structure that implements Join/LendJoin/MaybeJoin if the contained T does and that yields all indices, returning None for all missing elements and Some(T) for found elements.

impl<'a, 'b, T> ParJoin for &'a ReadExpect<'b, T>

where &'a T: ParJoin, T: Resource,

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

Type of joined components.

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

Type of joined storages.

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

Type of joined bit mask.

unsafe fn open(self) -> (Self::Mask, Self::Value)

Open this join by returning the mask and the storages.

unsafe fn get(v: &Self::Value, i: Index) -> Self::Type

Get a joined component value by a given index.

fn is_unconstrained() -> bool

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

fn par_join(self) -> JoinParIter<Self>

where Self: Sized,

Create a joined parallel iterator over the contents.

impl<'a, 'b, T> RepeatableLendGet for &'a ReadExpect<'b, T>

where &'a T: RepeatableLendGet, T: Resource,