Struct StreamSink 

pub struct StreamSink(/* private fields */);

Implementations

impl StreamSink

pub fn new(writer: impl Write + 'static) -> Self

pub fn process_stdout() -> Self

pub fn redirect(&self, writer: impl Write + 'static)

Replace the destination; every clone of this sink follows.

pub fn redirect_on_first_write<W: Write + 'static>( &self, open: impl FnOnce() -> Result<W> + 'static, )

Replace the destination when there is a first byte to write, so a run that writes none leaves the writer unopened. Failing to open it fails that write and every later one.

pub fn cancel_pending_redirect(&self)

Drop a destination redirect_on_first_write armed but never needed, so the run keeps the destination it had.

pub fn is_open(&self) -> bool

False once a write met a BrokenPipe: what follows is discarded.

pub fn with_writer<R>(&self, write: impl FnOnce(&mut dyn Write) -> R) -> R

pub fn write_line(&self, bytes: &[u8]) -> Result<()>

One write of bytes and the newline that terminates it, then a flush.

Trait Implementations

impl Clone for StreamSink

fn clone(&self) -> StreamSink

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for StreamSink

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

Formats the value using the given formatter.