Struct FrameSlice

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pub struct FrameSlice<'frame> { /* private fields */ }
Expand description

A borrowed reference to a part of the frame.

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impl<'frame> FrameSlice<'frame>

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pub fn new(frame: &'frame Bytes) -> FrameSlice<'frame>

Creates a new FrameSlice from a reference of a Bytes object.

This method is exposed to allow writing deserialization tests for custom types.

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pub fn new_empty() -> FrameSlice<'frame>

Creates an empty FrameSlice.

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pub fn is_empty(&self) -> bool

Returns true if the slice has length of 0.

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pub fn as_slice(&self) -> &'frame [u8]

Returns the subslice.

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pub fn as_slice_mut(&mut self) -> &mut &'frame [u8]

Returns a mutable reference to the subslice.

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pub fn as_original_frame_bytes(&self) -> &'frame Bytes

Returns a reference to the Bytes object which encompasses the whole frame slice.

The Bytes object will usually be larger than the slice returned by FrameSlice::as_slice. If you wish to obtain a new Bytes object that points only to the subslice represented by the FrameSlice object, see FrameSlice::to_bytes.

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pub fn to_bytes(&self) -> Bytes

Returns a new Bytes object which is a subslice of the original Bytes frame slice object.

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pub fn read_cql_bytes( &mut self, ) -> Result<Option<FrameSlice<'frame>>, LowLevelDeserializationError>

Reads and consumes a [bytes] item from the beginning of the frame, returning a subslice that encompasses that item.

If the operation fails then the slice remains unchanged.

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pub fn read_n_bytes( &mut self, count: usize, ) -> Result<Option<FrameSlice<'frame>>, LowLevelDeserializationError>

Reads and consumes a fixed number of bytes from the beginning of the frame, returning a subslice that encompasses them.

If this slice is empty, returns Ok(None). Otherwise, if the slice does not contain enough data, it returns Err. If the operation fails then the slice remains unchanged.

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impl<'frame> Clone for FrameSlice<'frame>

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fn clone(&self) -> FrameSlice<'frame>

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl<'frame> Debug for FrameSlice<'frame>

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

Formats the value using the given formatter. Read more
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impl<'frame> Copy for FrameSlice<'frame>

Auto Trait Implementations§

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impl<'frame> Freeze for FrameSlice<'frame>

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impl<'frame> RefUnwindSafe for FrameSlice<'frame>

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impl<'frame> Send for FrameSlice<'frame>

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impl<'frame> Sync for FrameSlice<'frame>

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impl<'frame> Unpin for FrameSlice<'frame>

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impl<'frame> UnwindSafe for FrameSlice<'frame>

Blanket Implementations§

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

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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

Mutably borrows from an owned value. Read more
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impl<T> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dst: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dst. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T> Instrument for T

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

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
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fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more
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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

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

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impl<T> IntoEither for T

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fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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impl<T> Same for T

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type Output = T

Should always be Self
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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<V, T> VZip<V> for T
where V: MultiLane<T>,

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fn vzip(self) -> V

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impl<T> WithSubscriber for T

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fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more
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fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more
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impl<T> ErasedDestructor for T
where T: 'static,