コード例 #1
0
        public override int GenerateCode(int loc, IVirtualMachine vm, CheckerInformation info)
        {
            loc = Term.GenerateCode(loc, vm, info);
            loc = RepTerm.GenerateCode(loc, vm, info);

            var type = GetExpressionType(info);

            if (type == Type.INT32)
            {
                switch (Operator)
                {
                case Operators.PLUS:
                    vm.IntAdd(loc++);
                    break;

                case Operators.MINUS:
                    vm.IntSub(loc++);
                    break;

                default:
                    throw new IVirtualMachine.InternalError(
                              "There's an invalid operator in ASTAddOpr. Operator: " + Operator.ToString());
                }
            }
            else if (type == Type.DECIMAL)
            {
                switch (Operator)
                {
                case Operators.PLUS:
                    vm.DecimalAdd(loc++);
                    break;

                case Operators.MINUS:
                    vm.DecimalSub(loc++);
                    break;

                default:
                    throw new IVirtualMachine.InternalError(
                              "There's an invalid operator in ASTAddOpr. Operator: " + Operator.ToString());
                }
            }
            else
            {
                throw new IVirtualMachine.InternalError(
                          "There's an invalid operand type in ASTAddOpr. type: " + type.ToString());
            }
            return(loc);
        }