fn prompt()

in src/main.rs [108:119]

• 12 lines of code
• 6 McCabe index (conditional complexity)

fn prompt(prompt_text: &str, letters: &str, default: Option<char>) -> Result<char> {
    loop {
        let input = prompt_reply_stdout(prompt_text).context("Unable to read user input")?;
        if input.is_empty() && default.is_some() {
            return Ok(default.unwrap());
        }
        if input.len() == 1 && letters.contains(&input) {
            return Ok(input.chars().next().unwrap());
        }
        println!("Come again?")
    }
}