Add day3 parser

Author: qselle

Cargo.lock

@@ -6,3 +6,4 @@ edition = "2021"
 [dependencies]
 aoc-runner = "0.3.0"
 aoc-runner-derive = "0.3.0"
+regex = "1.11.1"

Cargo.toml

@@ -0,0 +1,33 @@
+use regex::Regex;
+
+use aoc_runner_derive::{aoc, aoc_generator};
+
+#[aoc_generator(day3)]
+pub fn input_generator(input: &str) -> Vec<String> {
+    let re = Regex::new(r"(mul\(\d+,\d+\))").unwrap();
+    let matches: Vec<_> = re.find_iter(input).map(|m| m.as_str()).collect();
+    matches.iter().map(|&s| s.to_string()).collect()
+}
+
+#[aoc(day3, part1)]
+pub fn part1(input: &[String]) -> usize {
+    dbg!(input);
+    0
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    const INPUT: &str = "xmul(2,4)%&mul[3,7]!@^do_not_mul(5,5)+mul(32,64]then(mul(11,8)mul(8,5))";
+
+    #[test]
+    fn test_part1() {
+        assert_eq!(2, part1(&input_generator(INPUT)))
+    }
+
+    //     #[test]
+    //     fn test_part2() {
+    //         assert_eq!(4, part2(&input_generator(INPUT)))
+    //     }
+}

src/day3.rs

@@ -2,5 +2,6 @@ use aoc_runner_derive::aoc_lib;
 
 mod day1;
 mod day2;
+mod day3;
 
 aoc_lib! { year = 2024 }