Get Implementing domain-specific languages with Xtext and Xtend PDF

By Lorenzo Bettini

ISBN-10: 1782160302

ISBN-13: 9781782160304

Learn tips to enforce a DSL with Xtext and Xtend utilizing easy-to-understand examples and top practices

Overview

  • Learn to speedy enhance a domain-specific language with Xtext
  • Implement any point of a DSL utilizing Xtend, an absolutely featured Java-like programming language
  • Discover tips on how to try out a DSL implementation and the way to customise runtime and IDE elements of the DSL

In Detail

Xtext is an open resource Eclipse framework for enforcing domain-specific languages including its IDE functionalities. It permits you to enforce languages fairly fast, and, so much of all, it covers all facets of an entire language infrastructure, ranging from the parser, code generator, interpreter, and more.

"Implementing Domain-Specific Languages with Xtext and Xtend" will educate you ways to advance a DSL with Xtext, an Eclipse framework for imposing domain-specific languages. The chapters are like tutorials that describe the most techniques of Xtext comparable to grammar definition, validation, code iteration, customizations, and lots of extra, via easy and easy-to-understand examples.

Starting with in brief overlaying the good points of Xtext which are occupied with a DSL implementation, together with integration in an IDE, the e-book will then introduce you to Xtend as this language should be utilized in the entire examples through the booklet. We then continue by means of explaining the most innovations of Xtext, akin to validation, code new release, and customizations of runtime and UI features. by way of the tip of the publication, you've realized find out how to try out a DSL applied in Xtext with Junit, so as to stick to a test-driven improvement approach that might aid the developer enforce maintainable code that's a lot quicker and cleaner.

A test-driven method is used during the publication whilst proposing complex ideas comparable to variety checking and scoping. The booklet additionally indicates you ways to construct and unencumber a DSL in order that it may be put in in Eclipse, and provides you tricks on tips on how to construct the DSL headlessly in a continuing integration server.

"Implementing Domain-Specific Languages with Xtext and Xtend" goals to counterpoint the professional Xtext documentation to provide an explanation for the most thoughts via simplified examples and to educate the easiest practices for a DSL implementation in Xtext. it's a Beginner’s consultant which may still set you up for pro improvement DSL and its Eclipse IDE tooling.

What you'll study from this book

  • Learn to jot down an Xtext grammar for a DSL
  • Use Xtend in its place to Java to write down purifier, easier-to-read, and extra maintainable code
  • Write constraint tests for a DSL utilizing the validator mechanism
  • Learn the right way to write a code generator and an interpreter for a DSL
  • Discover how computerized image solution works in Xtext and the way to customise it
  • Build and install a DSL implementation in order that others can set up it
  • Get good versed with the common Xtext improvement workflow

Approach

A step by step consultant that allows you to speedy enforce a DSL with Xtext and Xtend in a test-driven manner due to simplified examples.

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Extra resources for Implementing domain-specific languages with Xtext and Xtend

Sample text

Most of the Eclipse projects that in some way deal with modeling are based on EMF since it simplifies the development of complex software applications with its modeling mechanisms. The model specification (metamodel) can be described in XMI, XML Schema, UML, Rational Rose, or annotated Java. It is also possible to specify the metamodel programmatically using Xcore, which was implemented in Xtext. Typically, a metamodel is defined in the Ecore format, which is basically an implementation of a subset of UML class diagrams.

For the moment, you can consider this simplified scenario: for each rule in your grammar, an EMF interface and class will be created with a field for each feature in the rule (together with a getter and setter). For instance, for the Entity rule, we will have the corresponding Java interface (and the corresponding implementation Java class): public interface Entity extends EObject { String getName(); void setName(String value); Entity getSuperType(); void setSuperType(Entity value); EList getAttributes(); } [ 35 ] Creating Your First Xtext Language Since these Java artifacts are generated, they are placed in the corresponding package in the src-gen folder.

Starting from this specification, Xtext will automatically generate all the mechanisms sketched previously. It will generate the lexer, the parser, the AST model, the construction of the AST to represent the parsed program, and the Eclipse editor with all the IDE features! [ 17 ] Implementing a DSL Xtext comes with good and smart default implementations for all these aspects, and indeed most of these defaults will surely fit your needs. However, every single aspect can be customized by the programmer.

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Implementing domain-specific languages with Xtext and Xtend by Lorenzo Bettini


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