Struct kv::ValueBuf

pub struct ValueBuf<T>(pub Vec<u8>, _);

A Value can be used to dynamically build values

Methods

impl<T: Encoding> ValueBuf<T>

Important traits for ValueBuf<T>

impl<T: Encoding> Read for ValueBuf<T>impl<T: Encoding> Write for ValueBuf<T>

pub fn empty() -> ValueBuf<T>

Create an empty value buffer

Important traits for ValueBuf<T>

impl<T: Encoding> Read for ValueBuf<T>impl<T: Encoding> Write for ValueBuf<T>

pub fn new(n: usize) -> ValueBuf<T>

Create a new ValueBuf with the given size

pub fn inner(&self) -> Result<T, Error>

Get inner value

Trait Implementations

impl<T: Debug> Debug for ValueBuf<T>

fn fmt(&self, f: &mut Formatter) -> Result

Formats the value using the given formatter.

impl<T: Clone> Clone for ValueBuf<T>

Important traits for ValueBuf<T>

impl<T: Encoding> Read for ValueBuf<T>impl<T: Encoding> Write for ValueBuf<T>

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

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<T: PartialEq> PartialEq for ValueBuf<T>

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

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &ValueBuf<T>) -> bool

This method tests for !=.

impl<T: PartialOrd> PartialOrd for ValueBuf<T>

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

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

fn lt(&self, other: &ValueBuf<T>) -> bool

This method tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &ValueBuf<T>) -> bool

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

fn gt(&self, other: &ValueBuf<T>) -> bool

This method tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &ValueBuf<T>) -> bool

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

impl<T: Encoding> AsRef<[u8]> for ValueBuf<T>

Important traits for &'a [u8]

impl<'a> Read for &'a [u8]impl<'a> Write for &'a mut [u8]

fn as_ref(&self) -> &[u8]

Performs the conversion.

impl<'a, T: Encoding> Value<'a> for ValueBuf<T>

fn from_raw(raw: &[u8]) -> Self

Used to convert a byte-slice to Value

impl<T: Encoding> Read for ValueBuf<T>

fn read(&mut self, buf: &mut [u8]) -> Result<usize>

Pull some bytes from this source into the specified buffer, returning how many bytes were read.

unsafe fn initializer(&self) -> Initializer

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

Determines if this Reader can work with buffers of uninitialized memory.

fn read_to_end(&mut self, buf: &mut Vec<u8>) -> Result<usize, Error>

Read all bytes until EOF in this source, placing them into buf.

fn read_to_string(&mut self, buf: &mut String) -> Result<usize, Error>

Read all bytes until EOF in this source, appending them to buf.

fn read_exact(&mut self, buf: &mut [u8]) -> Result<(), Error>

Read the exact number of bytes required to fill buf.

Important traits for &'a mut R

impl<'a, R> Read for &'a mut R where
    R: Read + ?Sized, impl<'a, W> Write for &'a mut W where
    W: Write + ?Sized, impl<'a, I> Iterator for &'a mut I where
    I: Iterator + ?Sized,  type Item = <I as Iterator>::Item;

fn by_ref(&mut self) -> &mut Self

Creates a "by reference" adaptor for this instance of Read.

Important traits for Bytes<R>

impl<R> Iterator for Bytes<R> where
    R: Read,  type Item = Result<u8, Error>;

fn bytes(self) -> Bytes<Self>

Transforms this Read instance to an [Iterator] over its bytes.

Important traits for Chars<R>

impl<R> Iterator for Chars<R> where
    R: Read,  type Item = Result<char, CharsError>;

fn chars(self) -> Chars<Self>

Deprecated since 1.27.0

: Use str::from_utf8 instead: https://doc.rust-lang.org/nightly/std/str/struct.Utf8Error.html#examples

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

the semantics of a partial read/write of where errors happen is currently unclear and may change

Transforms this Read instance to an [Iterator] over [char]s.

Important traits for Chain<T, U>

impl<T, U> Read for Chain<T, U> where
    T: Read,
    U: Read, 

fn chain<R>(self, next: R) -> Chain<Self, R> where     R: Read,

Creates an adaptor which will chain this stream with another.

Important traits for Take<T>

impl<T> Read for Take<T> where
    T: Read, 

fn take(self, limit: u64) -> Take<Self>

Creates an adaptor which will read at most limit bytes from it.

impl<T: Encoding> Write for ValueBuf<T>

fn write(&mut self, buf: &[u8]) -> Result<usize>

Write a buffer into this object, returning how many bytes were written.

fn flush(&mut self) -> Result<()>

Flush this output stream, ensuring that all intermediately buffered contents reach their destination.

fn write_all(&mut self, buf: &[u8]) -> Result<(), Error>

Attempts to write an entire buffer into this write.

fn write_fmt(&mut self, fmt: Arguments) -> Result<(), Error>

Writes a formatted string into this writer, returning any error encountered.

Important traits for &'a mut R

impl<'a, R> Read for &'a mut R where
    R: Read + ?Sized, impl<'a, W> Write for &'a mut W where
    W: Write + ?Sized, impl<'a, I> Iterator for &'a mut I where
    I: Iterator + ?Sized,  type Item = <I as Iterator>::Item;

fn by_ref(&mut self) -> &mut Self

Creates a "by reference" adaptor for this instance of Write.