autochomp/src/main.rs


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use std::{
    error::Error,
    io::{self, Read, Write},
    process::exit,
};

use chewed::{IterWrapper, Parser};

mod nibble;

fn main() {
    let mut input = String::new();
    let res = io::stdin()
        .read_to_string(&mut input)
        .map_err(|e| Box::new(e) as Box<dyn Error>)
        .and_then(|_| {
            IterWrapper::new(input.chars())
                .parse::<nibble::Ast>()
                .map_err(|e| Box::new(e) as Box<dyn Error>)
        })
        .and_then(|ast| {
            write!(io::stdout(), "{:?}", ast).map_err(|e| Box::new(e) as Box<dyn Error>)
        });

    if let Err(e) = res {
        eprintln!("{}", e);
        exit(1)
    }
}