Function promptly::prompt_default

pub fn prompt_default<T, S>(msg: S, default: T) -> Result<T, ReadlineError> where
    T: Promptable,
    S: AsRef<str>, 

Prompt until input can be parsed as T, returning the default for empty input.

Examples

use promptly::prompt_default;

// Prompt Y/n with a default value when input is empty
let fallback = prompt_default("Would you like to receive marketing emails", true)?;

// Prompt for a string with default
let fav_lang = prompt_default("Enter you favorite programming language", "Rust".to_string())?;

// Prompt for other `FromStr` types
let local_ip = prompt_default("Enter your local IP", Ipv4Addr::new(127, 0, 0, 1))?;

Errors

Returns a ReadlineError if readline fails. Input that can’t be coerced into the specified type results in re-prompting.