update README.md

README.md

@@ -9,17 +9,41 @@ scala macro and abstract syntax tree learning code.
     - Contains constructor parameters which have `val`/`var` modifier and class internal fields.
     - The existing custom `toString` method will fail to compile.
 
-- source code
+- source code1
 ```scala
-@toString
+@toString(isContainsCtorParams = true)
 class TestClass(val i: Int = 0, var j: Int) {
   val y: Int = 0
   var z: String = "hello"
   var x: String = "world"
 }
+// result of scalac
+class TestClass extends scala.AnyRef {
+  <paramaccessor> val i: Int = _;
+  <paramaccessor> var j: Int = _;
+  def <init>(i: Int = 0, j: Int) = {
+    super.<init>();
+    ()
+  };
+  val y: Int = 0;
+  var z: String = "hello";
+  var x: String = "world";
+  override def toString(): String = scala.collection.immutable.List(i, j, y, z, x).toString.replace("List", "TestClass") // a crude way, TODO refactor it.
+}
+
+//println(new TestClass(1, 2)) 
+//TestClass(1, 2, 0, hello, world)
 ```
-- result of scalac
+
+- source code2
 ```scala
+@toString
+class TestClass(val i: Int = 0, var j: Int) {
+  val y: Int = 0
+  var z: String = "hello"
+  var x: String = "world"
+}
+// result of scalac
 class TestClass extends scala.AnyRef {
   <paramaccessor> val i: Int = _;
   <paramaccessor> var j: Int = _;
@@ -30,7 +54,9 @@ class TestClass extends scala.AnyRef {
   val y: Int = 0;
   var z: String = "hello";
   var x: String = "world";
-  override def toString(): String = scala.collection.immutable.List(i, j, y, z, x).toString.replace("List", "TestClass") // a crude way, TODO refactor it.
+  override def toString(): String = scala.collection.immutable.List(y, z, x).toString.replace("List", "TestClass") // a crude way, TODO refactor it.
 }
+//println(new TestClass(1, 2))
+//TestClass(0, hello, world)
 ```