Macro eprompt 

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

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

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

Examples

use io_prompt_prototype::eprompt;

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