In this chapter, we will describe a few advanced topics concerning an Xtext DSL implementation, and some advanced techniques. In the first part of the chapter, we will show how to manually maintain the Ecore model for the AST of an Xtext DSL. This way, you will have full control on the shape of the AST, instead of delegating that to the automatic Xtext Ecore inference mechanisms. Of course, the Xtext grammar and the Ecore model will still have to be consistent, but you will be able tweak the AST structure. You will also be able to add to the AST some derived state, which is computed from the DSL program, but which is not directly present in the program itself. In the first section, we will show how to create an Xtext DSL starting from an existing Ecore model, while in the second section, we will show how to switch to a manually maintained Ecore model, starting from the one generated by Xtext. In the third section, we will use Xcore to maintain the Ecore model...
Implementing Domain-Specific Languages with Xtext and Xtend - Second Edition
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Implementing Domain-Specific Languages with Xtext and Xtend - Second Edition
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Overview of this book
Xtext is an open source Eclipse framework for implementing domain-specific languages together with IDE functionalities. It lets you implement languages really quickly; most of all, it covers all aspects of a complete language infrastructure, including the parser, code generator, interpreter, and more.
This book will enable you to implement Domain Specific Languages (DSL) efficiently, together with their IDE tooling, with Xtext and Xtend. Opening with brief coverage of Xtext features involved in 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. You will then explore the typical programming development workflow with Xtext when we modify the grammar of the DSL.
Further, the Xtend programming language (a fully-featured Java-like language tightly integrated with Java) will be introduced. We then explain the main concepts of Xtext, such as validation, code generation, and customizations of runtime and UI aspects. You will have learned how to test a DSL implemented in Xtext with JUnit and will progress to advanced concepts such as type checking and scoping. You will then integrate the typical Continuous Integration systems built in to Xtext DSLs and familiarize yourself with Xbase. By the end of the book, you will manually maintain the EMF model for an Xtext DSL and will see how an Xtext DSL can also be used in IntelliJ.
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Table of Contents (25 chapters)
Implementing Domain-Specific Languages with Xtext and Xtend - Second Edition
Credits
Foreword
About the Author
Acknowledgments
About the Reviewer
www.PacktPub.com
Preface
Preface to the second edition
Free Chapter
Implementing a DSL
Creating Your First Xtext Language
Working with the Xtend Programming Language
Validation
Code Generation
Customizing Xtext Components
Testing
An Expression Language
Scoping
Continuous Integration
Xbase
Advanced Topics
Conclusions
Bibliography
Index
Customer Reviews