Struct tracing_subscriber::fmt::writer::MutexGuardWriter

pub struct MutexGuardWriter<'a, W>(_);

Available on crate features fmt and std only.

A type implementing io::Write for a MutexGuard where the type inside the Mutex implements io::Write.

This is used by the MakeWriter implementation for Mutex, because MutexGuard itself will not implement io::Write — instead, it dereferences to a type implementing io::Write. Because MakeWriter requires the Writer type to implement io::Write, it’s necessary to add a newtype that forwards the trait implementation.

Trait Implementations

impl<'a, W: Debug> Debug for MutexGuardWriter<'a, W>

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

Formats the value using the given formatter.

impl<'a, W> Write for MutexGuardWriter<'a, W> where
    W: 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.