GOTO expr,GOSUB expr実装

SMILEBASIC/VM.d

@@ -40,9 +40,11 @@ class VM
     Value[] global;
     VMVariable[wstring] globalTable;
     Function[wstring] functions;
+    int[wstring] globalLabel;
     int bp;
     PetitComputer petitcomputer;
-    this(Code[] code, int len, VMVariable[wstring] globalTable, Function[wstring] functions, DataTable gdt/*GNU Debugging Tools*/)
+    this(Code[] code, int len, VMVariable[wstring] globalTable, Function[wstring] functions, DataTable gdt/*GNU Debugging Tools*/,
+         int[wstring] globalLabel)
     {
         this.code = code;
         this.stack = new Value[16384];
@@ -55,6 +57,7 @@ class VM
         }
         this.functions = functions;
         this.globalDataTable = gdt;
+        this.globalLabel = globalLabel;
     }
     Code getCurrent()
     {
@@ -638,6 +641,27 @@ class GotoFalse : Code
         return "gotofalse " ~ address.to!string(16);
     }
 }
+class GotoExpr : Code
+{
+    Scope sc;
+    this(Scope sc)
+    {
+        this.sc = sc;
+    }
+    override void execute(VM vm)
+    {
+        Value label;
+        vm.pop(label);
+        if(!label.isString)
+        {
+            vm.pc = vm.globalLabel[label.castString] - 1;
+        }
+        else
+        {
+            throw new TypeMismatch();
+        }
+    }
+}
 class GosubAddr : Code
 {
     int address;
@@ -671,6 +695,28 @@ class GosubS : Code
         stderr.writeln("can't execute (compiler bug?)");
     }
 }
+class GosubExpr : Code
+{
+    Scope sc;
+    this(Scope sc)
+    {
+        this.sc = sc;
+    }
+    override void execute(VM vm)
+    {
+        Value label;
+        vm.pop(label);
+        if(!label.isString)
+        {
+            vm.push(Value(vm.pc));
+            vm.pc = vm.globalLabel[label.castString] - 1;
+        }
+        else
+        {
+            throw new TypeMismatch();
+        }
+    }
+}
 class ReturnSubroutine : Code
 {
     this()

SMILEBASIC/compiler.d

@@ -737,7 +737,16 @@ class Compiler
                 break;
             case NodeType.Goto:
                 {
-                    genCodeGoto((cast(Goto)i).label, s);
+                    auto gotou = cast(Goto)i;
+                    if(!gotou.label)
+                    {
+                        compileExpression(gotou.labelexpr, s);
+                        genCode(new GotoExpr(s));
+                    }
+                    else
+                    {
+                        genCodeGoto(gotou.label, s);
+                    }
                 }
                 break;
             case NodeType.If:
@@ -749,7 +758,15 @@ class Compiler
             case NodeType.Gosub:
                 {
                     auto gosub = cast(Gosub)i;
-                    genCodeGosub(gosub.label, s);
+                    if(gosub.label)
+                    {
+                        genCodeGosub(gosub.label, s);
+                    }
+                    else
+                    {
+                        compileExpression(gosub.labelexpr, s);
+                        genCode(new GosubExpr(s));
+                    }
                 }
                 break;
             case NodeType.Return:
@@ -969,7 +986,7 @@ class Compiler
                 code[i] = new RestoreCode(s.data.label[restore.label], s.data);
             }
         }
-        return new VM(code, globalIndex + 1, global, functions, s.data);
+        return new VM(code, globalIndex + 1, global, functions, s.data, globalLabel);
     }
 }
 

SMILEBASIC/node.d

@@ -222,6 +222,12 @@ class Goto : Statement
         this.type = NodeType.Goto;
         this.label = name;
     }
+    Expression labelexpr;
+    this(Expression expr)
+    {
+        this.type = NodeType.Goto;
+        this.labelexpr = expr;
+    }
 }
 class If : Statement
 {
@@ -271,6 +277,12 @@ class Gosub : Statement
         this.type = NodeType.Gosub;
         this.label = name;
     }
+    Expression labelexpr;
+    this(Expression expr)
+    {
+        this.type = NodeType.Gosub;
+        this.labelexpr = expr;
+    }
 }
 class Return : Statement
 {

SMILEBASIC/parser.d

@@ -825,8 +825,10 @@ class Parser
                     node = new Goto(token.value.stringValue);
                 else
                 {
-                    writeln("NotImpl");
-                    syntaxError();
+                    auto e = expression();
+                    if(!e)
+                        syntaxError();
+                    node = new Goto(e);
                 }
                 break;
             case TokenType.Gosub:
@@ -836,8 +838,10 @@ class Parser
                     node = new Gosub(token.value.stringValue);
                 else
                 {
-                    writeln("NotImpl");
-                    syntaxError();
+                    auto e = expression();
+                    if(!e)
+                        syntaxError();
+                    node = new Gosub(e);
                 }
                 break;
             case TokenType.If:

SMILEBASIC/sprite.d

@@ -172,8 +172,6 @@ struct SpriteCollision
             return true;
         if(x <= x2 && y <= y2 + h2 && x + w >= x2 && y + h >= y2 + h2)
             return true;
-        //if(x2 <= x && y2 <= y && x2 + (data.w * data.scalex) >= x && y + (data.h * data.scaley) >= y)
-        //    return true;
         return false;
     }
 }