Function breez_sdk_liquid::lightning::io::stdout
1.0.0 · source · pub fn stdout() -> Stdout ⓘ
Expand description
Constructs a new handle to the standard output of the current process.
Each handle returned is a reference to a shared global buffer whose access
is synchronized via a mutex. If you need more explicit control over
locking, see the Stdout::lock
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.
§Examples
Using implicit synchronization:
use std::io::{self, Write};
fn main() -> io::Result<()> {
io::stdout().write_all(b"hello world")?;
Ok(())
}
Using explicit synchronization:
use std::io::{self, Write};
fn main() -> io::Result<()> {
let stdout = io::stdout();
let mut handle = stdout.lock();
handle.write_all(b"hello world")?;
Ok(())
}