Trait ReadWritePipe 

pub trait ReadWritePipe: Write {
    // Provided method
    fn write_reader<R: Read>(&mut self, r: R) -> Result<usize> { ... }
}

A trait for objects implementing Write, to write all content from a Read object.

This trait adds one method to the writers implementing it.

• write_reader This method allows to read a whole reader object into the writer. There is no garantee about the state of both reader and writer in case of an error.

use std::io;
use read_write_pipe::*;
let _ = io::stdout().write_reader(io::stdin()).unwrap();

Provided Methods

fn write_reader<R: Read>(&mut self, r: R) -> Result<usize>

Examples found in repository

examples/simple_cat.rs (line 5)

fn main() -> io::Result<()> {
    let _ = io::stdout().write_reader(io::stdin())?;
    Ok(())
}

examples/copy_file.rs (line 23)

fn main() -> io::Result<()> {
    prepare_input()?;
    let input = File::open("a.txt")?;
    let mut output = OpenOptions::new()
        .read(true)
        .write(true)
        .create(true)
        .open("b.txt")?;
    let _ = output.write_reader(input)?;
    Ok(())
}

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors

impl<W: Write> ReadWritePipe for W