--- a/core/src/luan/LuanJavaFunction.java	Wed Oct 08 06:22:04 2014 +0000
+++ b/core/src/luan/LuanJavaFunction.java	Thu Oct 09 22:44:07 2014 +0000
@@ -232,18 +232,27 @@
 		public Object convert(Object obj) {
 			return obj;
 		}
+		@Override public String toString() {
+			return "ARG_SAME";
+		}
 	};
 
 	private static final ArgConverter ARG_BOOLEAN = new ArgConverter() {
 		public Object convert(Object obj) {
 			return Luan.toBoolean(obj);
 		}
+		@Override public String toString() {
+			return "ARG_BOOLEAN";
+		}
 	};
 
 	private static final ArgConverter ARG_BOOLEAN_OBJ = new ArgConverter() {
 		public Object convert(Object obj) {
 			return obj==null ? null : Luan.toBoolean(obj);
 		}
+		@Override public String toString() {
+			return "ARG_BOOLEAN_OBJ";
+		}
 	};
 
 	private static final ArgConverter ARG_DOUBLE = new ArgConverter() {
@@ -262,6 +271,9 @@
 			}
 			return obj;
 		}
+		@Override public String toString() {
+			return "ARG_DOUBLE";
+		}
 	};
 
 	private static final ArgConverter ARG_FLOAT = new ArgConverter() {
@@ -280,6 +292,9 @@
 			}
 			return obj;
 		}
+		@Override public String toString() {
+			return "ARG_FLOAT";
+		}
 	};
 
 	private static final ArgConverter ARG_LONG = new ArgConverter() {
@@ -300,6 +315,9 @@
 			}
 			return obj;
 		}
+		@Override public String toString() {
+			return "ARG_LONG";
+		}
 	};
 
 	private static final ArgConverter ARG_INTEGER = new ArgConverter() {
@@ -320,6 +338,9 @@
 			}
 			return obj;
 		}
+		@Override public String toString() {
+			return "ARG_INTEGER";
+		}
 	};
 
 	private static final ArgConverter ARG_SHORT = new ArgConverter() {
@@ -340,6 +361,9 @@
 			}
 			return obj;
 		}
+		@Override public String toString() {
+			return "ARG_SHORT";
+		}
 	};
 
 	private static final ArgConverter ARG_BYTE = new ArgConverter() {
@@ -360,6 +384,9 @@
 			}
 			return obj;
 		}
+		@Override public String toString() {
+			return "ARG_BYTE";
+		}
 	};
 
 	private static final ArgConverter ARG_TABLE = new ArgConverter() {
@@ -388,6 +415,9 @@
 			}
 			return obj;
 		}
+		@Override public String toString() {
+			return "ARG_TABLE";
+		}
 	};
 
 	private static final ArgConverter ARG_MAP = new ArgConverter() {
@@ -398,6 +428,9 @@
 			}
 			return obj;
 		}
+		@Override public String toString() {
+			return "ARG_MAP";
+		}
 	};
 
 	private static final ArgConverter ARG_LIST = new ArgConverter() {
@@ -409,6 +442,9 @@
 			}
 			return obj;
 		}
+		@Override public String toString() {
+			return "ARG_LIST";
+		}
 	};
 
 	private static final ArgConverter ARG_SET = new ArgConverter() {
@@ -420,6 +456,9 @@
 			}
 			return obj;
 		}
+		@Override public String toString() {
+			return "ARG_SET";
+		}
 	};
 
 	private static class ArgArray implements ArgConverter {