modify pretty print tree and update testcases

Author: paulzfm

TestCases/S1/result/fibonacci.result

@@ -1,60 +1,138 @@
-program
-    class Main <empty>
-        static func main voidtype
-            formals
-            stmtblock
-                vardef i inttype
-                vardef F classtype Fibonacci
-                assign
-                    varref F
-                    newobj Fibonacci
-                assign
-                    varref i
-                    intconst 0
-                while
-                    les
-                        varref i
-                        intconst 10
-                    stmtblock
-                        print
-                            call get
-                                varref F
-                                varref i
-                            stringconst "\n"
-                        assign
-                            varref i
-                            add
-                                varref i
-                                intconst 1
-                assign
-                    varref i
-                    readint
-                print
-                    call get
-                        varref F
-                        varref i
-                    stringconst "\n"
-    class Fibonacci <empty>
-        func get inttype
-            formals
-                vardef index inttype
-            stmtblock
-                if
-                    les
-                        varref index
-                        intconst 2
-                    stmtblock
-                        return
-                            intconst 1
-                return
-                    add
-                        call get
-                            <empty>
-                            sub
-                                varref index
-                                intconst 1
-                        call get
-                            <empty>
-                            sub
-                                varref index
-                                intconst 2
+TopLevel @ (3,1)
+    List
+        ClassDef @ (3,1)
+            Main
+            <none>
+            List
+                MethodDef @ (6,17)
+                    main
+                    List
+                        <empty>
+                    TVoid @ (6,12)
+                    Block @ (6,24)
+                        List
+                            LocalVarDef @ (7,13)
+                                TInt @ (7,9)
+                                i
+                            LocalVarDef @ (8,25)
+                                TClass @ (8,9)
+                                    Fibonacci
+                                F
+                            Assign @ (10,11)
+                                VarSel @ (10,9)
+                                    <none>
+                                    F
+                                NewClass @ (10,13)
+                                    Fibonacci
+                            Assign @ (11,11)
+                                VarSel @ (11,9)
+                                    <none>
+                                    i
+                                IntLit @ (11,13)
+                                    0
+                            While @ (12,9)
+                                BinaryExpr @ (12,18)
+                                    <
+                                    VarSel @ (12,16)
+                                        <none>
+                                        i
+                                    IntLit @ (12,20)
+                                        10
+                                Block @ (12,24)
+                                    List
+                                        Print @ (13,13)
+                                            List
+                                                Call @ (13,22)
+                                                    VarSel @ (13,20)
+                                                        <none>
+                                                        F
+                                                    get
+                                                    List
+                                                        VarSel @ (13,26)
+                                                            <none>
+                                                            i
+                                                StringLit @ (13,30)
+                                                    "\n"
+                                        Assign @ (14,15)
+                                            VarSel @ (14,13)
+                                                <none>
+                                                i
+                                            BinaryExpr @ (14,19)
+                                                +
+                                                VarSel @ (14,17)
+                                                    <none>
+                                                    i
+                                                IntLit @ (14,21)
+                                                    1
+                            Assign @ (17,11)
+                                VarSel @ (17,9)
+                                    <none>
+                                    i
+                                ReadInt @ (17,13)
+                            Print @ (18,9)
+                                List
+                                    Call @ (18,18)
+                                        VarSel @ (18,16)
+                                            <none>
+                                            F
+                                        get
+                                        List
+                                            VarSel @ (18,22)
+                                                <none>
+                                                i
+                                    StringLit @ (18,26)
+                                        "\n"
+                    true
+        ClassDef @ (22,1)
+            Fibonacci
+            <none>
+            List
+                MethodDef @ (25,9)
+                    get
+                    List
+                        LocalVarDef @ (25,17)
+                            TInt @ (25,13)
+                            index
+                    TInt @ (25,5)
+                    Block @ (25,24)
+                        List
+                            If @ (26,9)
+                                BinaryExpr @ (26,19)
+                                    <
+                                    VarSel @ (26,13)
+                                        <none>
+                                        index
+                                    IntLit @ (26,21)
+                                        2
+                                Block @ (26,24)
+                                    List
+                                        Return @ (27,13)
+                                            IntLit @ (27,20)
+                                                1
+                                <none>
+                            Return @ (29,9)
+                                BinaryExpr @ (29,31)
+                                    +
+                                    Call @ (29,16)
+                                        <none>
+                                        get
+                                        List
+                                            BinaryExpr @ (29,26)
+                                                -
+                                                VarSel @ (29,20)
+                                                    <none>
+                                                    index
+                                                IntLit @ (29,28)
+                                                    1
+                                    Call @ (29,33)
+                                        <none>
+                                        get
+                                        List
+                                            BinaryExpr @ (29,43)
+                                                -
+                                                VarSel @ (29,37)
+                                                    <none>
+                                                    index
+                                                IntLit @ (29,45)
+                                                    2
+                    false