tidy up

2022-aoc/src/d4.rs

@@ -1,6 +1,7 @@
 use aoc_runner_derive::{aoc as aoc_run, aoc_generator};
 
-type Assignments = ((u32, u32), (u32, u32));
+type TRange = (u32, u32);
+type Assignments = (TRange, TRange);
 
 #[aoc_generator(day4)]
 fn parse_input(input: &str) -> Vec<Assignments> {
@@ -36,15 +37,15 @@ fn part2(scheds: &[Assignments]) -> u32 {
     out
 }
 
-fn get_range(r: &str) -> (u32, u32) {
+fn get_range(r: &str) -> TRange {
     let (lo, hi) = r.split_once('-').unwrap();
     (lo.parse().unwrap(), hi.parse().unwrap())
 }
 
-fn contains(a: &(u32, u32), b: &(u32, u32)) -> bool {
+fn contains(a: &TRange, b: &TRange) -> bool {
     a.0 <= b.0 && b.1 <= a.1
 }
 
-fn overlaps(a: &(u32, u32), b: &(u32, u32)) -> bool {
+fn overlaps(a: &TRange, b: &TRange) -> bool {
     a.0 <= b.0 && b.0 <= a.1
 }