Macro epromptln 

macro_rules! epromptln {
    ($($arg:tt)*) => { ... };
}

Prints to the standard error, with a newline. Then reads a line of input.

This is a shorthand for calling eprintln!, read_line, and removing any trailing newlines from the output.

Examples

use io_prompt_prototype::epromptln;

let num: u16 = epromptln!("What's your favorite number? >").parse()?;
println!("Oh, cool: {}!", num);