making 2023 a generic aoc repo

2023/day-1/src/part1.rs

@@ -0,0 +1,59 @@
+#![warn(clippy::all, clippy::pedantic)]
+
+use nom::{
+    self,
+    character::complete::{alphanumeric1, newline},
+    multi::separated_list1,
+};
+
+/// Day-1 part 1 of AC2023
+///
+/// # Arguments
+/// - input the input for day1 as a string
+///
+/// # Panics
+/// This panics whenever a number isn't present in a line of the input
+///
+/// # Errors
+/// errors when can't parse the input
+pub fn part1(input: &str) -> nom::IResult<&str, String> {
+    let (_, values) = parse_input(input)?;
+    println!("{values:?}");
+    Ok((
+        "",
+        values
+            .iter()
+            .map(|v| v.first().expect("always at least one number") * 10 + v.last().expect("always atleast one number"))
+            .sum::<u32>()
+            .to_string(),
+    ))
+}
+
+fn parse_input(input: &str) -> nom::IResult<&str, Vec<Vec<u32>>> {
+    let (i, j) = separated_list1(newline, alphanumeric1)(input)?;
+    let res = j
+        .iter()
+        .map(|v| {
+            v.chars()
+                .filter_map(|x| x.to_digit(10))
+                .collect::<Vec<u32>>()
+        })
+        .collect::<Vec<Vec<u32>>>();
+    Ok((i, res))
+}
+
+#[cfg(test)]
+mod test {
+    use super::*;
+
+    const INPUT: &str = "1abc2
+pqr3stu8vwx
+a1b2c3d4e5f
+treb7uchet";
+
+    #[test]
+    fn part1_works() {
+        let (_, result) = part1(INPUT).unwrap();
+        assert_eq!(result, "142".to_string());
+    }
+}