1 files changed, 14 insertions, 0 deletions
diff --git a/semiring/src/lib.rs b/semiring/src/lib.rs
new file mode 100644
index 0000000..7d12d9a
--- /dev/null
+++ b/semiring/src/lib.rs
@@ -0,0 +1,14 @@
+pub fn add(left: usize, right: usize) -> usize {
+    left + right
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn it_works() {
+        let result = add(2, 2);
+        assert_eq!(result, 4);
+    }
+}