Trait Output 

pub trait Output {
    // Required methods
    fn sink(&mut self) -> &mut dyn Write;
    fn draw_target(&self) -> ProgressDrawTarget;
}

To enable testing and output redirection, the output stream that tests print to is hidden behind this Output trait, which consists of two parts:

• sink: A &mut dyn std::io::Write which is the target for all test prints.
• draw_target: The target that all progress bars should use.

Required Methods

fn sink(&mut self) -> &mut dyn Write

fn draw_target(&self) -> ProgressDrawTarget

Trait Implementations

impl Write for &mut dyn Output

This allows &mut dyn Output to be used as the receiver of the write! macro.

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.

Implementors

impl Output for DefaultOutput

impl Output for Memory

impl Output for Sink