solution: day8

src/bin/08.rs

@@ -0,0 +1,51 @@
+use lazy_static::lazy_static;
+use regex::Regex;
+
+lazy_static! {
+    static ref RE_MEM: Regex = Regex::new(r#"(\\\\|\\"|\\x.{2})"#).unwrap();
+    static ref RE_ENCODE: Regex = Regex::new(r#"(\\|")"#).unwrap();
+}
+
+fn mem_size(line: &str) -> usize {
+    RE_MEM.replace_all(line, "").len() + RE_MEM.captures_iter(line).count() - 2
+}
+
+fn encode_size(line: &str) -> usize {
+    line.len() + RE_ENCODE.captures_iter(line).count() + 2
+}
+
+pub fn part_one(input: &str) -> Option<u32> {
+    let res: usize = input
+        .trim()
+        .split('\n')
+        .map(|x| x.len() - mem_size(x))
+        .sum();
+    Some(res as u32)
+}
+pub fn part_two(input: &str) -> Option<u32> {
+    let res: usize = input
+        .trim()
+        .split('\n')
+        .map(|x| encode_size(x) - x.len())
+        .sum();
+    Some(res as u32)
+}
+fn main() {
+    let input = &aoc::read_file("inputs", 8);
+    aoc::solve!(1, part_one, input);
+    aoc::solve!(2, part_two, input);
+}
+#[cfg(test)]
+mod tests {
+    use super::*;
+    #[test]
+    fn test_part_one() {
+        let input = aoc::read_file("test_inputs", 8);
+        assert_eq!(part_one(&input), Some(12));
+    }
+    #[test]
+    fn test_part_two() {
+        let input = aoc::read_file("test_inputs", 8);
+        assert_eq!(part_two(&input), Some(19));
+    }
+}

src/test_inputs/08.txt

@@ -0,0 +1,4 @@
+""
+"abc"
+"aaa\"aaa"
+"\x27"