Struct tracing_subscriber::fmt::writer::Tee

pub struct Tee<A, B> { /* fields omitted */ }

This is supported on crate feature fmt only.

Combines two types implementing MakeWriter (or std::io::Write) to produce a writer that writes to both MakeWriter’s returned writers.

This is returned by the MakeWriterExt::and method. See the method documentation for details.

Implementations

impl<A, B> Tee<A, B>

pub fn new(a: A, b: B) -> Self

Combines two types implementing MakeWriter, returning a new MakeWriter that produces writers that write to both outputs.

See the documentation for MakeWriterExt::and for details.

Trait Implementations

impl<A: Clone, B: Clone> Clone for Tee<A, B>

fn clone(&self) -> Tee<A, B>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<A: Debug, B: Debug> Debug for Tee<A, B>

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

Formats the value using the given formatter.

impl<A, B> MakeWriter for Tee<A, B> where
    A: MakeWriter,
    B: MakeWriter, 

type Writer = Tee<A::Writer, B::Writer>

The concrete io::Write implementation returned by make_writer.

fn make_writer(&self) -> Self::Writer

Returns an instance of Writer.

fn make_writer_for(&self, meta: &Metadata<'_>) -> Self::Writer

Returns a Writer for writing data from the span or event described by the provided Metadata.

impl<A: PartialEq, B: PartialEq> PartialEq<Tee<A, B>> for Tee<A, B>

fn eq(&self, other: &Tee<A, B>) -> bool

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

fn ne(&self, other: &Tee<A, B>) -> bool

This method tests for !=.

impl<A, B> Write for Tee<A, B> where
    A: Write,
    B: Write, 

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

Write a buffer into this writer, 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_vectored(&mut self, bufs: &[IoSlice<'_>]) -> Result<usize>

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

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

Attempts to write an entire buffer into this writer.

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

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

fn is_write_vectored(&self) -> bool

🔬 This is a nightly-only experimental API. (can_vector #69941)

Determines if this Writer has an efficient write_vectored implementation.

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

🔬 This is a nightly-only experimental API. (write_all_vectored #70436)

Attempts to write multiple buffers into this writer.

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

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

impl<A: Copy, B: Copy> Copy for Tee<A, B>

impl<A: Eq, B: Eq> Eq for Tee<A, B>

impl<A, B> StructuralEq for Tee<A, B>

impl<A, B> StructuralPartialEq for Tee<A, B>