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use aoc2019::*;
use std::io;
use std::io::prelude::*;
use std::process;
use structopt::StructOpt;
#[derive(Debug, StructOpt)]
#[structopt(name = "Day 5: Sunny with a Chance of Asteroids")]
/// Executes an Intcode program
///
/// The program is read from stdin as a series of comma-separated
/// values. Newlines are ignored.
///
/// See https://adventofcode.com/2019/day/5 for details.
struct Opt {
#[structopt(short = "i", long = "input")]
input: Vec<Intcode>,
}
fn main() {
let stdin = io::stdin();
let opt = Opt::from_args();
let program: IntcodeProgram = stdin
.lock()
.split(b',')
.map(|x| exit_on_failed_assertion(x, "Error reading input"))
.map(|x| exit_on_failed_assertion(String::from_utf8(x), "Input was not valid UTF-8"))
.map(|x| exit_on_failed_assertion(x.trim().parse::<Intcode>(), "Invalid number"))
.collect::<IntcodeProgram>()
.with_input(opt.input.into_iter().collect());
let result = exit_on_failed_assertion(program.execute(), "Program errored");
println!("{}", result);
}
fn exit_on_failed_assertion<A, E: std::error::Error>(data: Result<A, E>, message: &str) -> A {
match data {
Ok(data) => data,
Err(e) => {
eprintln!("{}: {}", message, e);
process::exit(1);
}
}
}
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