Noline is an IO-agnostic #[no_std] line editor providing robust line editing for any system. The core functionality is IO-free, so it can be adapted to any system be it embedded, async, async embedded, WASM or IPoAC (IP over Avian Carriers).

Features:

• IO-free
• Minimal dependencies
• No allocation needed - Both heap-based and static buffers are provided
• UTF-8 support
• Emacs keybindings

Possible future features:

• Auto-completion and hints
• Line history

The API should be considered experimental and will change in the future.

The core consists of a massive state machine taking bytes as input and returning an iterator over byte slices. There are, however, some convenience wrappers:

• [sync::Editor]
• [sync::std::IO]
• [sync::embedded::IO]
• [no_sync::tokio::Editor]

Example

use noline::sync::{std::IO, Editor};
use std::io;
use std::fmt::Write;
use termion::raw::IntoRawMode;

fn main() {
let mut stdin = io::stdin();
let mut stdout = io::stdout().into_raw_mode().unwrap();
let prompt = "> ";

let mut io = IO::new(stdin, stdout);
let mut editor = Editor::<Vec<u8>, _>::new(&mut io).unwrap();

loop {
if let Ok(line) = editor.readline(prompt, &mut io) {
write!(io, "Read: '{}'\n\r", line).unwrap();
} else {
break;
}
}
}