Enum Writer

pub enum Writer {
    // some variants omitted
}

This union acts as thin abstraction layer over over input streams. Its goal is to allow allow seamingless redirection of output to either a buffer, a file or even terminal IO.

Implementations

impl Writer

pub fn new_write(out: Box<dyn Write>) -> Self

Creates a new Writer backed by object that implements Write.

pub fn new_buf() -> Self

Returns a new buffer based Writer.

pub fn bytes(self) -> Option<Vec<u8>>

This function consumes the Writer object, it returns the data stored there if the object is buffer based.

pub fn utf8_string(self) -> Option<String>

This function consumes the Writer object, it returns UTF-8 String representation of the data stored there if it is buffer. based and the buffer holds UTF-8 data.

pub fn bytes_ref(&self) -> Option<&Vec<u8>>

This function returns a reference to the data stored in respective Writer if the object is buffer based.

pub fn bytes_mut(&mut self) -> Option<&mut Vec<u8>>

This function returns a mutable reference to the data stored in respective Writer if the object is buffer. based.

Trait Implementations

impl Default for Writer

fn default() -> Self

Returns the “default value” for a type.

impl Write for Writer

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

Writes a buffer into this writer, returning how many bytes were written.

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

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

fn write_vectored(&mut self, bufs: &[IoSlice<'_>]) -> Result<usize, Error>

Like write, except that it writes from a slice of buffers.

fn is_write_vectored(&self) -> bool

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

Determines if this Writer has an efficient write_vectored implementation.

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

Attempts to write an entire buffer into this writer.

fn write_all_vectored(&mut self, bufs: &mut [IoSlice<'_>]) -> Result<(), Error>

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

Attempts to write multiple buffers into this writer.

fn write_fmt(&mut self, args: Arguments<'_>) -> Result<(), Error>

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

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

where Self: Sized,

Creates a “by reference” adapter for this instance of Write.