fixed comp_for and added reseved word type

1 files changed, 16 insertions, 0 deletions

diff --git a/src/ast/types/NoneType.java b/src/ast/types/NoneType.java
new file mode 100644
index 0000000..42f7fd7
--- /dev/null
+++ b/src/ast/types/NoneType.java
@@ -0,0 +1,16 @@
+package ast.types;
+
+/**
+ * A none type. None return unit.
+ */
+public class NoneType extends Type {
+
+    public String toPrint(String prefix) {
+        return prefix + "None\n";
+    }
+
+    @Override
+    public String toString() {
+        return "None";
+    }
+}