pub struct IntoInnerError<W>(_, _);
Expand description
An error returned by BufWriter::into_inner
which combines an error that
happened while writing out the buffer, and the buffered writer object
which may be used to recover from the condition.
Examples
use std::io::BufWriter;
use std::net::TcpStream;
let mut stream = BufWriter::new(TcpStream::connect("127.0.0.1:34254").unwrap());
// do stuff with the stream
// we want to get our `TcpStream` back, so let's try:
let stream = match stream.into_inner() {
Ok(s) => s,
Err(e) => {
// Here, e is an IntoInnerError
panic!("An error occurred");
}
};
Implementations
sourceimpl<W> IntoInnerError<W>
impl<W> IntoInnerError<W>
sourcepub fn error(&self) -> &Error
pub fn error(&self) -> &Error
Returns the error which caused the call to BufWriter::into_inner()
to fail.
This error was returned when attempting to write the internal buffer.
Examples
use std::io::BufWriter;
use std::net::TcpStream;
let mut stream = BufWriter::new(TcpStream::connect("127.0.0.1:34254").unwrap());
// do stuff with the stream
// we want to get our `TcpStream` back, so let's try:
let stream = match stream.into_inner() {
Ok(s) => s,
Err(e) => {
// Here, e is an IntoInnerError, let's log the inner error.
//
// We'll just 'log' to stdout for this example.
println!("{}", e.error());
panic!("An unexpected error occurred.");
}
};
sourcepub fn into_inner(self) -> W
pub fn into_inner(self) -> W
Returns the buffered writer instance which generated the error.
The returned object can be used for error recovery, such as re-inspecting the buffer.
Examples
use std::io::BufWriter;
use std::net::TcpStream;
let mut stream = BufWriter::new(TcpStream::connect("127.0.0.1:34254").unwrap());
// do stuff with the stream
// we want to get our `TcpStream` back, so let's try:
let stream = match stream.into_inner() {
Ok(s) => s,
Err(e) => {
// Here, e is an IntoInnerError, let's re-examine the buffer:
let buffer = e.into_inner();
// do stuff to try to recover
// afterwards, let's just return the stream
buffer.into_inner().unwrap()
}
};
1.55.0 · sourcepub fn into_error(self) -> Error
pub fn into_error(self) -> Error
Consumes the IntoInnerError
and returns the error which caused the call to
BufWriter::into_inner()
to fail. Unlike error
, this can be used to
obtain ownership of the underlying error.
Example
use std::io::{BufWriter, ErrorKind, Write};
let mut not_enough_space = [0u8; 10];
let mut stream = BufWriter::new(not_enough_space.as_mut());
write!(stream, "this cannot be actually written").unwrap();
let into_inner_err = stream.into_inner().expect_err("now we discover it's too small");
let err = into_inner_err.into_error();
assert_eq!(err.kind(), ErrorKind::WriteZero);
1.55.0 · sourcepub fn into_parts(self) -> (Error, W)
pub fn into_parts(self) -> (Error, W)
Consumes the IntoInnerError
and returns the error which caused the call to
BufWriter::into_inner()
to fail, and the underlying writer.
This can be used to simply obtain ownership of the underlying error; it can also be used for advanced error recovery.
Example
use std::io::{BufWriter, ErrorKind, Write};
let mut not_enough_space = [0u8; 10];
let mut stream = BufWriter::new(not_enough_space.as_mut());
write!(stream, "this cannot be actually written").unwrap();
let into_inner_err = stream.into_inner().expect_err("now we discover it's too small");
let (err, recovered_writer) = into_inner_err.into_parts();
assert_eq!(err.kind(), ErrorKind::WriteZero);
assert_eq!(recovered_writer.buffer(), b"t be actually written");
Trait Implementations
sourceimpl<W> Debug for IntoInnerError<W> where
W: Debug,
impl<W> Debug for IntoInnerError<W> where
W: Debug,
sourceimpl<W> Display for IntoInnerError<W>
impl<W> Display for IntoInnerError<W>
sourceimpl<W> Error for IntoInnerError<W> where
W: Send + Debug,
impl<W> Error for IntoInnerError<W> where
W: Send + Debug,
sourcefn description(&self) -> &str
fn description(&self) -> &str
use the Display impl or to_string()
1.30.0 · sourcefn source(&self) -> Option<&(dyn Error + 'static)>
fn source(&self) -> Option<&(dyn Error + 'static)>
The lower-level source of this error, if any. Read more
sourceimpl<W> From<IntoInnerError<W>> for Error
impl<W> From<IntoInnerError<W>> for Error
sourcefn from(iie: IntoInnerError<W>) -> Error
fn from(iie: IntoInnerError<W>) -> Error
Converts to this type from the input type.
Auto Trait Implementations
impl<W> !RefUnwindSafe for IntoInnerError<W>
impl<W> Send for IntoInnerError<W> where
W: Send,
impl<W> Sync for IntoInnerError<W> where
W: Sync,
impl<W> Unpin for IntoInnerError<W> where
W: Unpin,
impl<W> !UnwindSafe for IntoInnerError<W>
Blanket Implementations
impl<T> AsFail for T where
T: Fail,
impl<T> AsFail for T where
T: Fail,
fn as_fail(&self) -> &(dyn Fail + 'static)
fn as_fail(&self) -> &(dyn Fail + 'static)
Converts a reference to Self
into a dynamic trait object of Fail
.
sourceimpl<T> BorrowMut<T> for T where
T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
const: unstable · sourcefn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
sourceimpl<T> Downcast for T where
T: Any,
impl<T> Downcast for T where
T: Any,
sourcefn into_any(self: Box<T, Global>) -> Box<dyn Any + 'static, Global>ⓘNotable traits for Box<W, Global>impl<W> Write for Box<W, Global> where
W: Write + ?Sized, impl<R> Read for Box<R, Global> where
R: Read + ?Sized, impl<I, A> Iterator for Box<I, A> where
I: Iterator + ?Sized,
A: Allocator, type Item = <I as Iterator>::Item;
fn into_any(self: Box<T, Global>) -> Box<dyn Any + 'static, Global>ⓘNotable traits for Box<W, Global>impl<W> Write for Box<W, Global> where
W: Write + ?Sized, impl<R> Read for Box<R, Global> where
R: Read + ?Sized, impl<I, A> Iterator for Box<I, A> where
I: Iterator + ?Sized,
A: Allocator, type Item = <I as Iterator>::Item;
W: Write + ?Sized, impl<R> Read for Box<R, Global> where
R: Read + ?Sized, impl<I, A> Iterator for Box<I, A> where
I: Iterator + ?Sized,
A: Allocator, type Item = <I as Iterator>::Item;
Convert Box<dyn Trait>
(where Trait: Downcast
) to Box<dyn Any>
. Box<dyn Any>
can
then be further downcast
into Box<ConcreteType>
where ConcreteType
implements Trait
. Read more
sourcefn into_any_rc(self: Rc<T>) -> Rc<dyn Any + 'static>
fn into_any_rc(self: Rc<T>) -> Rc<dyn Any + 'static>
Convert Rc<Trait>
(where Trait: Downcast
) to Rc<Any>
. Rc<Any>
can then be
further downcast
into Rc<ConcreteType>
where ConcreteType
implements Trait
. Read more
sourcefn as_any(&self) -> &(dyn Any + 'static)
fn as_any(&self) -> &(dyn Any + 'static)
Convert &Trait
(where Trait: Downcast
) to &Any
. This is needed since Rust cannot
generate &Any
’s vtable from &Trait
’s. Read more
sourcefn as_any_mut(&mut self) -> &mut (dyn Any + 'static)
fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)
Convert &mut Trait
(where Trait: Downcast
) to &Any
. This is needed since Rust cannot
generate &mut Any
’s vtable from &mut Trait
’s. Read more
sourceimpl<T> DowncastSync for T where
T: Any + Send + Sync,
impl<T> DowncastSync for T where
T: Any + Send + Sync,
sourceimpl<A> DynCastExt for A
impl<A> DynCastExt for A
sourcefn dyn_cast<T>(
self
) -> Result<<A as DynCastExtHelper<T>>::Target, <A as DynCastExtHelper<T>>::Source> where
A: DynCastExtHelper<T>,
T: ?Sized,
fn dyn_cast<T>(
self
) -> Result<<A as DynCastExtHelper<T>>::Target, <A as DynCastExtHelper<T>>::Source> where
A: DynCastExtHelper<T>,
T: ?Sized,
Use this to cast from one trait object type to another. Read more
sourcefn dyn_upcast<T>(self) -> <A as DynCastExtAdvHelper<T, T>>::Target where
A: DynCastExtAdvHelper<T, T, Source = <A as DynCastExtAdvHelper<T, T>>::Target>,
T: ?Sized,
fn dyn_upcast<T>(self) -> <A as DynCastExtAdvHelper<T, T>>::Target where
A: DynCastExtAdvHelper<T, T, Source = <A as DynCastExtAdvHelper<T, T>>::Target>,
T: ?Sized,
Use this to upcast a trait to one of its supertraits. Read more
sourcefn dyn_cast_adv<F, T>(
self
) -> Result<<A as DynCastExtAdvHelper<F, T>>::Target, <A as DynCastExtAdvHelper<F, T>>::Source> where
A: DynCastExtAdvHelper<F, T>,
F: ?Sized,
T: ?Sized,
fn dyn_cast_adv<F, T>(
self
) -> Result<<A as DynCastExtAdvHelper<F, T>>::Target, <A as DynCastExtAdvHelper<F, T>>::Source> where
A: DynCastExtAdvHelper<F, T>,
F: ?Sized,
T: ?Sized,
sourcefn dyn_cast_with_config<C>(
self
) -> Result<<A as DynCastExtAdvHelper<<C as DynCastConfig>::Source, <C as DynCastConfig>::Target>>::Target, <A as DynCastExtAdvHelper<<C as DynCastConfig>::Source, <C as DynCastConfig>::Target>>::Source> where
C: DynCastConfig,
A: DynCastExtAdvHelper<<C as DynCastConfig>::Source, <C as DynCastConfig>::Target>,
fn dyn_cast_with_config<C>(
self
) -> Result<<A as DynCastExtAdvHelper<<C as DynCastConfig>::Source, <C as DynCastConfig>::Target>>::Target, <A as DynCastExtAdvHelper<<C as DynCastConfig>::Source, <C as DynCastConfig>::Target>>::Source> where
C: DynCastConfig,
A: DynCastExtAdvHelper<<C as DynCastConfig>::Source, <C as DynCastConfig>::Target>,
Use this to cast from one trait object type to another. With this method the type parameter is a config type that uniquely specifies which cast should be preformed. Read more
impl<E> Fail for E where
E: 'static + Error + Send + Sync,
impl<E> Fail for E where
E: 'static + Error + Send + Sync,
fn cause(&self) -> Option<&(dyn Fail + 'static)>
fn cause(&self) -> Option<&(dyn Fail + 'static)>
Returns a reference to the underlying cause of this failure, if it is an error that wraps other errors. Read more
fn backtrace(&self) -> Option<&Backtrace>
fn backtrace(&self) -> Option<&Backtrace>
Returns a reference to the Backtrace
carried by this failure, if it
carries one. Read more