Struct View 

pub struct View<T>
where
    T: Immutable + 'static + ?Sized,
{ /* private fields */ }

Immutable view with zero-copy field derive and cloning.

Access itself is the same as accessing a &T.

Has a backing ByteOwner that retains the bytes until all views are dropped, analogue to Bytes.

See ByteOwner for an exhaustive list and more details.

Implementations

impl<T> View<T>

where T: Immutable + ?Sized,

pub unsafe fn from_raw_parts( data: &'static T, owner: Arc<dyn ByteOwner>, ) -> View<T>

Creates a view from raw parts without any checks.

Safety

The caller must guarantee that data remains valid for the lifetime of owner.

pub fn downcast_to_owner<O>(self) -> Result<Arc<O>, View<T>>

where O: Send + Sync + 'static,

Returns the owner of the View in an Arc.

pub fn downgrade(&self) -> WeakView<T>

Create a weak pointer.

impl<T> View<T>

where T: Immutable + IntoBytes + ?Sized,

pub fn bytes(self) -> Bytes

Converts this view back into Bytes.

pub fn field_to_view<F>(&self, field: &F) -> Option<View<F>>

where F: Immutable + IntoBytes + ?Sized,

Attempt to convert reference to a zero-copy subview of this View.

Returns None if the bytes of the child are outside the memory range of the bytes of this view.

This is similar to Bytes::slice_to_bytes but for View.

Trait Implementations

impl<T> AsRef<T> for View<T>

where T: Immutable + ?Sized,

fn as_ref(&self) -> &T

Converts this type into a shared reference of the (usually inferred) input type.

impl<T> Borrow<T> for View<T>

where T: Immutable + ?Sized,

fn borrow(&self) -> &T

Immutably borrows from an owned value.

impl<T> Clone for View<T>

where T: Immutable + ?Sized,

fn clone(&self) -> View<T>

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<T> Debug for View<T>

where T: Immutable + Debug + ?Sized,

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl<T> Deref for View<T>

where T: Immutable + ?Sized,

type Target = T

The resulting type after dereferencing.

fn deref(&self) -> &<View<T> as Deref>::Target

Dereferences the value.

impl<T> Hash for View<T>

where T: Immutable + Hash + ?Sized,

fn hash<H>(&self, state: &mut H)

where H: Hasher,

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl<T> Ord for View<T>

where T: Ord + Immutable + ?Sized,

fn cmp(&self, other: &View<T>) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl<T> PartialEq for View<T>

where T: PartialEq + Immutable + ?Sized,

fn eq(&self, other: &View<T>) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<T> PartialOrd for View<T>

where T: PartialOrd + Immutable + ?Sized,

fn partial_cmp(&self, other: &View<T>) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl ToBlob<LongString> for View<str>

fn to_blob(self) -> Blob<LongString>

Converts this value into a blob.

impl TryFromBlob<LongString> for View<str>

type Error = ViewError

The error type returned when the conversion fails.

fn try_from_blob(b: Blob<LongString>) -> Result<Self, Self::Error>

Attempts to convert a blob into this type.

impl<T> Eq for View<T>

where T: Eq + Immutable + ?Sized,

impl<T> Send for View<T>

where T: Immutable + ?Sized,

impl<T> Sync for View<T>

where T: Immutable + ?Sized,