Struct tracing_subscriber::fmt::writer::Tee
source · pub struct Tee<A, B> { /* private fields */ }
Expand description
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§
source§impl<A, B> Tee<A, B>
impl<A, B> Tee<A, B>
sourcepub fn new(a: A, b: B) -> Self
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§
source§impl<A, B> MakeWriter for Tee<A, B>where
A: MakeWriter,
B: MakeWriter,
impl<A, B> MakeWriter for Tee<A, B>where A: MakeWriter, B: MakeWriter,
§type Writer = Tee<<A as MakeWriter>::Writer, <B as MakeWriter>::Writer>
type Writer = Tee<<A as MakeWriter>::Writer, <B as MakeWriter>::Writer>
The concrete
io::Write
implementation returned by make_writer
.source§impl<A: PartialEq, B: PartialEq> PartialEq<Tee<A, B>> for Tee<A, B>
impl<A: PartialEq, B: PartialEq> PartialEq<Tee<A, B>> for Tee<A, B>
source§impl<A, B> Write for Tee<A, B>where
A: Write,
B: Write,
impl<A, B> Write for Tee<A, B>where A: Write, B: Write,
source§fn write(&mut self, buf: &[u8]) -> Result<usize>
fn write(&mut self, buf: &[u8]) -> Result<usize>
Write a buffer into this writer, returning how many bytes were written. Read more
source§fn flush(&mut self) -> Result<()>
fn flush(&mut self) -> Result<()>
Flush this output stream, ensuring that all intermediately buffered
contents reach their destination. Read more
source§fn write_all(&mut self, buf: &[u8]) -> Result<()>
fn write_all(&mut self, buf: &[u8]) -> Result<()>
Attempts to write an entire buffer into this writer. Read more
source§fn write_fmt(&mut self, fmt: Arguments<'_>) -> Result<()>
fn write_fmt(&mut self, fmt: Arguments<'_>) -> Result<()>
Writes a formatted string into this writer, returning any error
encountered. Read more
source§fn is_write_vectored(&self) -> bool
fn is_write_vectored(&self) -> bool
🔬This is a nightly-only experimental API. (
can_vector
#69941)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>
Auto Trait Implementations§
impl<A, B> RefUnwindSafe for Tee<A, B>where A: RefUnwindSafe, B: RefUnwindSafe,
impl<A, B> Send for Tee<A, B>where A: Send, B: Send,
impl<A, B> Sync for Tee<A, B>where A: Sync, B: Sync,
impl<A, B> Unpin for Tee<A, B>where A: Unpin, B: Unpin,
impl<A, B> UnwindSafe for Tee<A, B>where A: UnwindSafe, B: UnwindSafe,
Blanket Implementations§
source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere T: ?Sized,
source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
source§impl<T> Instrument for T
impl<T> Instrument for T
source§fn instrument(self, span: Span) -> Instrumented<Self>
fn instrument(self, span: Span) -> Instrumented<Self>
source§fn in_current_span(self) -> Instrumented<Self>
fn in_current_span(self) -> Instrumented<Self>
source§impl<M> MakeWriterExt for Mwhere
M: MakeWriter,
impl<M> MakeWriterExt for Mwhere M: MakeWriter,
source§fn with_max_level(self, level: Level) -> WithMaxLevel<Self>where
Self: Sized,
fn with_max_level(self, level: Level) -> WithMaxLevel<Self>where Self: Sized,
Wraps
self
and returns a MakeWriter
that will only write output
for events at or below the provided verbosity Level
. For instance,
Level::TRACE
is considered to be _more verbosethan
Level::INFO`. Read moresource§fn with_min_level(self, level: Level) -> WithMinLevel<Self>where
Self: Sized,
fn with_min_level(self, level: Level) -> WithMinLevel<Self>where Self: Sized,
Wraps
self
and returns a MakeWriter
that will only write output
for events at or above the provided verbosity Level
. Read moresource§fn with_filter<F>(self, filter: F) -> WithFilter<Self, F>where
Self: Sized,
F: Fn(&Metadata<'_>) -> bool,
fn with_filter<F>(self, filter: F) -> WithFilter<Self, F>where Self: Sized, F: Fn(&Metadata<'_>) -> bool,
Wraps
self
with a predicate that takes a span or event’s Metadata
and returns a bool
. The returned MakeWriter
’s
MakeWriter::make_writer_for
method will check the predicate to
determine if a writer should be produced for a given span or event. Read moresource§fn and<B>(self, other: B) -> Tee<Self, B> ⓘwhere
Self: Sized,
B: MakeWriter + Sized,
fn and<B>(self, other: B) -> Tee<Self, B> ⓘwhere Self: Sized, B: MakeWriter + Sized,
Combines
self
with another type implementing MakeWriter
, returning
a new MakeWriter
that produces writers that write to both
outputs. Read moresource§fn or_else<W, B>(self, other: B) -> OrElse<Self, B>where
Self: MakeWriter<Writer = OptionalWriter<W>> + Sized,
B: MakeWriter + Sized,
W: Write,
fn or_else<W, B>(self, other: B) -> OrElse<Self, B>where Self: MakeWriter<Writer = OptionalWriter<W>> + Sized, B: MakeWriter + Sized, W: Write,
Combines
self
with another type implementing MakeWriter
, returning
a new MakeWriter
that calls other
’s make_writer
if self
’s
make_writer
returns OptionalWriter::none
. Read more