Attribute Grammar Inversion and Source-to-source Translation - download pdf or read online

By Daniel M. Yellin

ISBN-10: 3540190724

ISBN-13: 9783540190721

With the proliferation of laptop languages and dialects, you will need to create instruments to assist within the development of source-to-source translators. by way of permitting clients to use software program (or info) written for an additional process, those instruments shape a huge part within the quest for software program reusability. After discussing the theoretical and sensible problems with characteristic grammar inversion, this publication demonstrates how the method can be utilized to construct source-to-source translators. this is often performed by means of first picking out a typical canonical shape during which to symbolize a few of the resource languages after which writing characteristic grammars from every one resource to the canonical shape. by means of immediately inverting those characteristic grammars one obtains translators from the canonical shape again to every resource language and through composing the fitting pairs of translators one obtains source-to-source translators. To turn out the feasibility of the inversion method of source-to-source translation, it's been used to generate translators among the programming languages Pascal and C.

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Rename the components and edit their properties according to Figure 2-4. CHAPTER 2 ■ SETTING UP THE POSAPP Figure 2-4. Components and their properties of the MainScreenForm 8. Add a second multi-device form to the project. exe element in the Project Manager (see Figure 2-5) and choose HD Form from the wizard. 17 CHAPTER 2 ■ SETTING UP THE POSAPP Figure 2-5. The popup menu to add a form to the project 9. pas. Then use Figure 2-6 to add components, rename them, and adjust their properties. CHAPTER 2 ■ SETTING UP THE POSAPP Figure 2-6.

There are a few things left. In the InvoiceForm, select the PopupMenuItems popup menu component, open the Items Editor, and open a TMenuItem labeled Delete Entry. Select the menu item you created and implement the OnClick event. interface ... type TSalesInvoiceForm = class(TForm) ... procedure MenuItemDeleteItemClick(Sender: TObject); private ... public { Public declarations } end; ... implementation ... RemoveItem(tmpInvoiceItem, TDirection. FromBeginning); break; end; end; UpdateInvoiceGrid; UpdateBalance; end; Select the CheckBoxDiscount check box and write the OnChange event to update the discounted amount, as you have already considered the discount in UpdateBalance.

SaveCurrentSales takes the amount of the current invoice and adds it to the saved sales figure. 27 CHAPTER 2 ■ SETTING UP THE POSAPP The Main Form The last thing we need to implement is a way for the main screen to update the total amount of sales. Return to the MainScreenForm unit and create a private procedure entitled UpdateTotalSales. , Database; type TMainForm = class(TForm) ... procedure FormCreate(Sender: TObject); procedure FormDestroy(Sender: TObject); private procedure UpdateTotalSales; public { Public declarations } end; Enter the following code in the OnCreate event and, then, develop UpdateTotalSales (click anywhere in the class declaration and press Ctrl+Shift+C.

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Attribute Grammar Inversion and Source-to-source Translation by Daniel M. Yellin


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