Struct kvarn::prelude::internals::prelude::utils::prelude::io::Stdout

1.0.0 · source ·
pub struct Stdout { /* private fields */ }
Expand description

A handle to the global standard output stream of the current process.

Each handle shares a global buffer of data to be written to the standard output stream. Access is also synchronized via a lock and explicit control over locking is available via the lock method.

Created by the io::stdout method.

Note: Windows Portability Considerations

When operating in a console, the Windows implementation of this stream does not support non-UTF-8 byte sequences. Attempting to write bytes that are not valid UTF-8 will return an error.

In a process with a detached console, such as one using #![windows_subsystem = "windows"], or in a child process spawned from such a process, the contained handle will be null. In such cases, the standard library’s Read and Write will do nothing and silently succeed. All other I/O operations, via the standard library or via raw Windows API calls, will fail.

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impl Stdout

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pub fn lock(&self) -> StdoutLock<'static>

Locks this handle to the standard output stream, returning a writable guard.

The lock is released when the returned lock goes out of scope. The returned guard also implements the Write trait for writing data.

Examples
use std::io::{self, Write};

fn main() -> io::Result<()> {
    let mut stdout = io::stdout().lock();

    stdout.write_all(b"hello world")?;

    Ok(())
}

Trait Implementations§

1.63.0 · source§

impl AsFd for Stdout

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fn as_fd(&self) -> BorrowedFd<'_>

Borrows the file descriptor. Read more
1.21.0 · source§

impl AsRawFd for Stdout

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fn as_raw_fd(&self) -> i32

Extracts the raw file descriptor. Read more
1.16.0 · source§

impl Debug for Stdout

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

Formats the value using the given formatter. Read more
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impl IsTerminal for Stdout

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fn is_terminal(&self) -> bool

🔬This is a nightly-only experimental API. (is_terminal)
Returns true if the descriptor/handle refers to a terminal/tty. Read more
1.48.0 · source§

impl Write for &Stdout

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

Write a buffer into this writer, returning how many bytes were written. Read more
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fn write_vectored(&mut self, bufs: &[IoSlice<'_>]) -> Result<usize, Error>

Like write, except that it writes from a slice of buffers. Read more
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fn is_write_vectored(&self) -> bool

🔬This is a nightly-only experimental API. (can_vector)
Determines if this Writer has an efficient write_vectored implementation. Read more
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fn flush(&mut self) -> Result<(), Error>

Flush this output stream, ensuring that all intermediately buffered contents reach their destination. Read more
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fn write_all(&mut self, buf: &[u8]) -> Result<(), Error>

Attempts to write an entire buffer into this writer. Read more
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fn write_all_vectored(&mut self, bufs: &mut [IoSlice<'_>]) -> Result<(), Error>

🔬This is a nightly-only experimental API. (write_all_vectored)
Attempts to write multiple buffers into this writer. Read more
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fn write_fmt(&mut self, args: Arguments<'_>) -> Result<(), Error>

Writes a formatted string into this writer, returning any error encountered. Read more
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fn by_ref(&mut self) -> &mut Selfwhere Self: Sized,

Creates a “by reference” adapter for this instance of Write. Read more
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impl Write for Stdout

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

Write a buffer into this writer, returning how many bytes were written. Read more
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fn write_vectored(&mut self, bufs: &[IoSlice<'_>]) -> Result<usize, Error>

Like write, except that it writes from a slice of buffers. Read more
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fn is_write_vectored(&self) -> bool

🔬This is a nightly-only experimental API. (can_vector)
Determines if this Writer has an efficient write_vectored implementation. Read more
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fn flush(&mut self) -> Result<(), Error>

Flush this output stream, ensuring that all intermediately buffered contents reach their destination. Read more
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fn write_all(&mut self, buf: &[u8]) -> Result<(), Error>

Attempts to write an entire buffer into this writer. Read more
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fn write_all_vectored(&mut self, bufs: &mut [IoSlice<'_>]) -> Result<(), Error>

🔬This is a nightly-only experimental API. (write_all_vectored)
Attempts to write multiple buffers into this writer. Read more
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fn write_fmt(&mut self, args: Arguments<'_>) -> Result<(), Error>

Writes a formatted string into this writer, returning any error encountered. Read more
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fn by_ref(&mut self) -> &mut Selfwhere Self: Sized,

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

Auto Trait Implementations§

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impl<T> Any for Twhere T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<'a, T, E> AsTaggedExplicit<'a, E> for Twhere T: 'a,

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fn explicit(self, class: Class, tag: u32) -> TaggedParser<'a, Explicit, Self, E>

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impl<'a, T, E> AsTaggedImplicit<'a, E> for Twhere T: 'a,

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fn implicit( self, class: Class, constructed: bool, tag: u32 ) -> TaggedParser<'a, Implicit, Self, E>

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impl<T> Borrow<T> for Twhere T: ?Sized,

const: unstable · source§

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for Twhere T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T> Instrument for T

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fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided [Span], returning an Instrumented wrapper. Read more
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fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more
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impl<T, U> Into<U> for Twhere U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> Pointable for T

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const ALIGN: usize = mem::align_of::<T>()

The alignment of pointer.
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type Init = T

The type for initializers.
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unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more
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unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more
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unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

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unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more
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impl<T> Same<T> for T

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type Output = T

Should always be Self
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impl<T, U> TryFrom<U> for Twhere U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for Twhere U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<V, T> VZip<V> for Twhere V: MultiLane<T>,

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Attaches the current default Subscriber to this type, returning a [WithDispatch] wrapper. Read more
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impl<W> WriteBytesExt for Wwhere W: Write + ?Sized,

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fn write_u8(&mut self, n: u8) -> Result<(), Error>

Writes an unsigned 8 bit integer to the underlying writer. Read more
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fn write_i8(&mut self, n: i8) -> Result<(), Error>

Writes a signed 8 bit integer to the underlying writer. Read more
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fn write_u16<T>(&mut self, n: u16) -> Result<(), Error>where T: ByteOrder,

Writes an unsigned 16 bit integer to the underlying writer. Read more
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fn write_i16<T>(&mut self, n: i16) -> Result<(), Error>where T: ByteOrder,

Writes a signed 16 bit integer to the underlying writer. Read more
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fn write_u24<T>(&mut self, n: u32) -> Result<(), Error>where T: ByteOrder,

Writes an unsigned 24 bit integer to the underlying writer. Read more
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fn write_i24<T>(&mut self, n: i32) -> Result<(), Error>where T: ByteOrder,

Writes a signed 24 bit integer to the underlying writer. Read more
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fn write_u32<T>(&mut self, n: u32) -> Result<(), Error>where T: ByteOrder,

Writes an unsigned 32 bit integer to the underlying writer. Read more
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fn write_i32<T>(&mut self, n: i32) -> Result<(), Error>where T: ByteOrder,

Writes a signed 32 bit integer to the underlying writer. Read more
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fn write_u48<T>(&mut self, n: u64) -> Result<(), Error>where T: ByteOrder,

Writes an unsigned 48 bit integer to the underlying writer. Read more
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fn write_i48<T>(&mut self, n: i64) -> Result<(), Error>where T: ByteOrder,

Writes a signed 48 bit integer to the underlying writer. Read more
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fn write_u64<T>(&mut self, n: u64) -> Result<(), Error>where T: ByteOrder,

Writes an unsigned 64 bit integer to the underlying writer. Read more
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fn write_i64<T>(&mut self, n: i64) -> Result<(), Error>where T: ByteOrder,

Writes a signed 64 bit integer to the underlying writer. Read more
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fn write_u128<T>(&mut self, n: u128) -> Result<(), Error>where T: ByteOrder,

Writes an unsigned 128 bit integer to the underlying writer.
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fn write_i128<T>(&mut self, n: i128) -> Result<(), Error>where T: ByteOrder,

Writes a signed 128 bit integer to the underlying writer.
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fn write_uint<T>(&mut self, n: u64, nbytes: usize) -> Result<(), Error>where T: ByteOrder,

Writes an unsigned n-bytes integer to the underlying writer. Read more
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fn write_int<T>(&mut self, n: i64, nbytes: usize) -> Result<(), Error>where T: ByteOrder,

Writes a signed n-bytes integer to the underlying writer. Read more
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fn write_uint128<T>(&mut self, n: u128, nbytes: usize) -> Result<(), Error>where T: ByteOrder,

Writes an unsigned n-bytes integer to the underlying writer. Read more
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fn write_int128<T>(&mut self, n: i128, nbytes: usize) -> Result<(), Error>where T: ByteOrder,

Writes a signed n-bytes integer to the underlying writer. Read more
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fn write_f32<T>(&mut self, n: f32) -> Result<(), Error>where T: ByteOrder,

Writes a IEEE754 single-precision (4 bytes) floating point number to the underlying writer. Read more
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fn write_f64<T>(&mut self, n: f64) -> Result<(), Error>where T: ByteOrder,

Writes a IEEE754 double-precision (8 bytes) floating point number to the underlying writer. Read more