Implementing Domain-Specific Languages with Xtext and Xtend

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Learn to write an Xtext grammar for a DSL Use Xtend as an alternative to Java to write cleaner, easier-to-read, and more maintainable code Write constraint checks for a DSL using the validator mechanism Learn how to write a code generator and an interpreter for a DSL Discover how automatic symbol resolution works in Xtext and how to customize it Build and deploy a DSL implementation so that others can install it Get well versed with the typical Xtext development workflow


Xtext is an open source Eclipse framework for implementing domain-specific languages together with its IDE functionalities. It lets you implement languages really quickly, and, most of all, it covers all aspects of a complete language infrastructure, starting from the parser, code generator, interpreter, and more. "Implementing Domain-Specific Languages with Xtext and Xtend" will teach you how to develop a DSL with Xtext, an Eclipse framework for implementing domain-specific languages. The chapters are like tutorials that describe the main concepts of Xtext such as grammar definition, validation, code generation, customizations, and many more, through uncomplicated and easy-to-understand examples. Starting with briefly covering the features of Xtext that are involved in a DSL implementation, including integration in an IDE, the book will then introduce you to Xtend as this language will be used in all the examples throughout the book. We then proceed by explaining the main concepts of Xtext, such as validation, code generation, and customizations of runtime and UI aspects. By the end of the book, you will have learned how to test a DSL implemented in Xtext with Junit, in order to follow a test-driven development strategy that will help the developer implement maintainable code that is much faster and cleaner. A test-driven approach is used throughout the book when presenting advanced concepts such as type checking and scoping. The book also shows you how to build and release a DSL so that it can be installed in Eclipse, and gives you hints on how to build the DSL headlessly in a continuous integration server. "Implementing Domain-Specific Languages with Xtext and Xtend" aims to complement the official Xtext documentation to explain the main concepts through simplified examples and to teach the best practices for a DSL implementation in Xtext. It is a Beginner’s Guide which should set you up for professional development DSL and its Eclipse IDE tooling.


Learn to quickly develop a domain-specific language with Xtext Implement any aspect of a DSL using Xtend, a fully featured Java-like programming language Discover how to test a DSL implementation and how to customize runtime and IDE aspects of the DSL

Page Count 342
Course Length 10 hours 15 minutes
ISBN 9781782160304
Date Of Publication 20 Aug 2013
An introduction to Xtend
Xtend – a better Java with less "noise"
Debugging Xtend code


Lorenzo Bettini

Lorenzo Bettini is an associate professor in computer science at the Dipartimento di Statistica, Informatica, Applicazioni "Giuseppe Parenti," Università di Firenze, Italy. Previously, he was a researcher in computer science at Dipartimento di Informatica, Università di Torino, Italy. He also was a Postdoc and a contractual researcher at Dipartimento di Sistemi e Informatica, Università di Firenze, Italy. He has a masters degree summa cum laude in computer science and a PhD in "Logics and Theoretical Computer Science." His research interests cover design, theory, and the implementation of programming languages (in particular, objectoriented languages and network-aware languages). He has been using Xtext since version 0.7. He has used Xtext and Xtend for implementing many domain-specific languages and Java-like programming languages. He also contributed to Xtext, and he recently became an Xtext committer. He is the author of the first edition of the book "Implementing Domain-Specific Languages with Xtext and Xtend", published by Packt Publishing (August 21, 2013). He is also the author of about 80 papers published in international conferences and international journals. You can contact him at