feat: create repo from template

src/lib.rs

@@ -0,0 +1 @@
+pub mod template;

src/template.rs

@@ -0,0 +1,56 @@
+/*
+ * This file contains template code.
+ * There is no need to edit this file unless you want to change template functionality.
+ */
+
+use std::env;
+use std::fs;
+
+pub const ANSI_ITALIC: &str = "\x1b[3m";
+pub const ANSI_BOLD: &str = "\x1b[1m";
+pub const ANSI_RESET: &str = "\x1b[0m";
+
+use std::fmt::Display;
+use std::time::Duration;
+use std::time::Instant;
+
+fn time_solution<T>(func: impl FnOnce(&str) -> Option<T>, input: &str) -> Option<(T, Duration)> {
+    let timer = Instant::now();
+    let result = func(input);
+    let elapsed = timer.elapsed();
+
+    result.map(|result| (result, elapsed))
+}
+
+pub fn print_result<T: Display>(func: impl FnOnce(&str) -> Option<T>, input: &str, part: u8) {
+    match time_solution(func, input) {
+        Some((result, elapsed)) => {
+            println!(
+                "{}Part {}{}: {} {}(elapsed: {:.2?}){}",
+                ANSI_BOLD, part, ANSI_RESET, result, ANSI_ITALIC, elapsed, ANSI_RESET
+            );
+        }
+        None => {
+            println!("{}Part {}{}: not solved.", ANSI_BOLD, part, ANSI_RESET)
+        }
+    }
+}
+
+#[macro_export]
+macro_rules! solution {
+    ($day:expr) => {
+        fn main() {
+            let input = aoc::template::read_file("inputs", $day);
+            aoc::template::print_result(part_one, &input, 1);
+            aoc::template::print_result(part_two, &input, 2);
+        }
+    };
+}
+
+#[must_use]
+pub fn read_file(folder: &str, day: u8) -> String {
+    let cwd = env::current_dir().unwrap();
+    let filepath = cwd.join("data").join(folder).join(format!("{day:02}.txt"));
+    let f = fs::read_to_string(filepath);
+    f.expect("could not open input file").trim().to_string()
+}