Crate promptor

Promptor - Simple, functional, monadic command-line prompts.

Heavily inspired by readMaybe from Haskell.

This crate provides an object that can hold input/output handles, and several methods that can be called on the input stream to get input, including validating input. These methods depend on std::str::FromStr being defined on the type.

Examples

Say you’d like to get a number from the user via stdin that is in the closed interval [1, 100]. To do this with Promptor, you first define the Promptor object and then call the prompt() method on it, like so:

use promptor::Promptor;

let stdio = std::io::stdin();
let input = stdio.lock();
let output = std::io::stdout();

let mut promptor = Promptor {
    reader: input,
    writer: output
};

let res: u32 = promptor.prompt("Please enter a number between 1 and 100: ", |x| 1 <= x && x <= 100);

If you only need a string, you can use get_line() instead:

use promptor::Promptor;
let stdio = std::io::stdin();
let input = stdio.lock();
let output = std::io::stdout();

let mut promptor = Promptor {
    reader: input,
    writer: output
};

let name = promptor.get_line("What is your name? ").unwrap();

Re-exports

pub use self::promptor::Promptor;

Modules

promptor

Promptor