create lib/ for common utils

2 files changed, 20 insertions, 0 deletions

diff --git a/lib/rust/Cargo.toml b/lib/rust/Cargo.toml
new file mode 100644
index 0000000..c0838b1
--- /dev/null
+++ b/lib/rust/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "aoc"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
diff --git a/lib/rust/src/lib.rs b/lib/rust/src/lib.rs
new file mode 100644
index 0000000..b93cf3f
--- /dev/null
+++ b/lib/rust/src/lib.rs
@@ -0,0 +1,14 @@
+pub fn add(left: u64, right: u64) -> u64 {
+    left + right
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn it_works() {
+        let result = add(2, 2);
+        assert_eq!(result, 4);
+    }
+}