public Script() { // 寄存器初始化 _ret_val = new Op { type = OpType.Null }; funcTable = new FuncTable(); symbolTable = new SymbolTable(); labelTable = new LabelTable(); stringTable = new StringTable(); instrStream = new InstrStream(); stack = new RuntimeStack(); // 初始化运行时堆栈大小 stack.SetStackSize(1024); }