1 files changed, 13 insertions, 0 deletions
diff --git a/src/main/java/bjc/funcdata/CListLike.java b/src/main/java/bjc/funcdata/CListLike.java
new file mode 100644
index 0000000..ba17456
--- /dev/null
+++ b/src/main/java/bjc/funcdata/CListLike.java
@@ -0,0 +1,13 @@
+package bjc.funcdata;
+
+public interface CListLike<T> {
+
+	boolean isEmpty();
+
+	T head();
+
+	CListLike<T> tail();
+
+	CListLike<T> prefix(T val);
+
+}
+\ No newline at end of file