Add args to Rust program to run individual days

bram/rust/src/lib.rs

@@ -15,7 +15,7 @@ use std::time::Duration;
 use crate::utils::read_from_file;
 use crate::utils::diagnostics;
 
-type DailyOutput = ( u128, u128, Duration );
+pub type DailyOutput = ( u128, u128, Duration );
 
 pub use crate::utils::diagnostics::AdventOfCode;
 

bram/rust/src/main.rs

@@ -1,4 +1,31 @@
 fn main() {
+    let args: Vec<String> = std::env::args().collect();
+
+    if args.len() > 1 {
+        let day : Option<u8> = args[1].parse().ok();
+
+        match day {
+            Some(1) => run_day(aoc2025::day_01),
+            // Some(2) => run_day(aoc2025::day_02),
+            // Some(3) => run_day(aoc2025::day_03),
+            // Some(4) => run_day(aoc2025::day_04),
+            // Some(5) => run_day(aoc2025::day_05),
+            // Some(6) => run_day(aoc2025::day_06),
+            // Some(7) => run_day(aoc2025::day_07),
+            // Some(8) => run_day(aoc2025::day_08),
+            // Some(9) => run_day(aoc2025::day_09),
+            // Some(10) => run_day(aoc2025::day_10),
+            // Some(11) => run_day(aoc2025::day_11),
+            // Some(12) => run_day(aoc2025::day_12),
+            Some(_) => run_all_days(),
+            None => run_all_days(),
+        }
+    } else { 
+        run_all_days();
+    }
+}
+
+fn run_all_days() {
     let mut aoc = aoc2025::AdventOfCode::new();
 
     aoc.insert(1, aoc2025::day_01());
@@ -16,3 +43,10 @@ fn main() {
 
     aoc.show_diagnostics();
 }
+
+fn run_day(day : fn() -> aoc2025::DailyOutput) {
+    let (p1, p2, _) = day();
+
+    println!("Part 1: {}", p1);
+    println!("Part 2: {}", p2);
+}