variable number of arguments for user defined functions.

src/main/java/carpet/script/value/FunctionAnnotationValue.java

@@ -0,0 +1,42 @@
+package carpet.script.value;
+
+import carpet.script.exception.InternalExpressionException;
+import net.minecraft.nbt.Tag;
+
+public class FunctionAnnotationValue extends Value
+{
+    // 0 global
+    // 1 vararg
+    public int type;
+    public FunctionAnnotationValue(Value variable, int type)
+    {
+        if (variable.boundVariable == null)
+            throw new InternalExpressionException("You can only borrow variables from the outer scope");
+        this.boundVariable = variable.boundVariable;
+        this.type = type;
+    }
+
+    @Override
+    public String getString()
+    {
+        return boundVariable;
+    }
+
+    @Override
+    public boolean getBoolean()
+    {
+        return false;
+    }
+
+    @Override
+    public int hashCode()
+    {
+        throw new UnsupportedOperationException("Global value cannot be used as a map key");
+    }
+
+    @Override
+    public Tag toTag(boolean force)
+    {
+        throw new UnsupportedOperationException("Global value cannot be serialized to the tag");
+    }
+}