2023(2): WIP add regex for capturing sets of a game

2023/day/2/main.rs

@@ -0,0 +1,44 @@
+use std::fs::File;
+use std::io::{self, BufRead};
+use std::path::Path;
+use regex::Regex;
+
+fn main() {
+	if let Ok(lines) = read_lines("./input") {
+		for line in lines {
+			if let Ok(text) = line {
+				Game g = parse_game(text);
+			} else {
+				println!("Error on line \"{:?}\"", line);
+			}
+		}
+	}
+}
+
+struct Bag {
+	red: u32,
+	green: u32,
+	blue: u32,
+}
+
+struct Set {
+	red: u32,
+	green: u32,
+	blue: u32,
+}
+
+struct Game {
+	ID: u32,
+	Vec<Set>,
+}
+
+fn parse_game(text: &String) -> Result<Game> {
+	let re = Regex::new(r"^Game ([0-9]+)(?:(?:(?::|;) )((?:[0-9]+ (?:red|blue|green)(?:, )?)+))+$").unwrap();
+	// TODO: Extract all captures. The second capture group only returns the last of the match.
+}
+
+fn read_lines<P>(filename: P) -> io::Result<io::Lines<io::BufReader<File>>>
+where P: AsRef<Path>, {
+    let file = File::open(filename)?;
+    Ok(io::BufReader::new(file).lines())
+}