Domain specific languages in eclipse with Xtext (Zeus, UGent)
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This document discusses domain specific languages (DSLs) and how they can be developed using Xtext. It provides examples of DSLs like regular expressions and SQL. It explains that DSLs allow problems to be expressed at the level of their domain, which allows domain experts to understand, validate, modify and develop programs. It then outlines how Xtext can be used to define the grammar of a DSL and generate rich editing support for the DSL in Eclipse. The document demonstrates a small DSL for modeling entities and properties and shows the live editing features provided by Xtext. It recommends Xtext as a framework for DSL development and provides information on tutorials and hiring.
Domain specific languages in eclipse with Xtext (Zeus, UGent)
- 1. Domain Specific Languages in Eclipse with Xtext redefine.digital.design: Helping you deal with complexity in VHDL and Verilog. Dr. Ir. Hendrik Eeckhaut
- 2. About CTO at Sigasi @heeckhau Sigasi Studio: Eclipse based IDE for VHDL and Verilog (digital hardware design)
- 3. • Domain Specific Languages (DSL) • Xtext • Demo Overview
- 4. Domain specific language “A domain-specific language (DSL) is a computer language specialized to a particular application domain” Examples: ●Regular expressions: ^com.sigasi.*$ ●SQL: SELECT * FROM table_name https://en.wikipedia.org/wiki/Domain-specific_language
- 5. Cold beer ● Optimize energy efficiency ● Lots of variants (size, components) ● Cooling algorithms ○ Straight forward ○ Exceptions and interactions ○ Different for variants
- 6. Refrigerator control Refrigerator description Cooling algorithm Code Generation C-code Documentation Domain specific simulator http://www.voelter.de/data/presentations/RefrigeratorsAndDSLs.pdf ● Understand ? ● Validate ? ● Modify ?
- 7. Why DSLs DSLs allow to express solutions at the abstraction level of the problem domain. ⇒ Domain experts can understand, validate, modify and develop DSL programs
- 8. How ? Language definition (BNF) Lexer and Parser Abstract Syntax Tree Linking, scoping, types Validation Code generator, interpreter
- 9. DSL Development Framework Full DSL infrastructure (parser, linker, …) Define DSL with a grammar language ⇩ + Rich editing support for Eclipse, IntelliJ IDEA and web browser
- 10. Rich editing ●Syntax coloring ●Type time validation ●Content assist (autocomplete) ●Code formatting ●Find references ●Rename ●Outline
- 11. How Language definition (BNF) Lexer and Parser Abstract Syntax Tree Linking, scoping, types Validation Code generator, interpreter → Xtext grammar → ANTLR → Eclipse EMF (partially generated) Java
- 12. To good to be true? ●Xtext contains default implementations for linking, validation, … ●Can be fully customized ●Wired together with Dependency Injection (Google Guice)
- 13. Demo Small DSL to model entities and properties 1. datatype String 2. 3. entity Blog { 4. title: String 5. many posts: Post 6. } 7. 8. entity HasAuthor { 9. author: String 10. } 11. 12. entity Post extends HasAuthor { 13. title: String 14. content: String 15. many comments: Comment 16. } 17. 18. entity Comment extends HasAuthor { 19. content: String 20. }
- 14. Demo 1. datatype String 2. 3. entity Blog { 4. title: String 5. many posts: Post 6. } 7. 8. entity HasAuthor { 9. author: String 10. } 11. 12. entity Post extends HasAuthor { 13. title: String 14. content: String 15. many comments: Comment 16. } 17. 18. entity Comment extends HasAuthor { 19. content: String 20. } elements : Type (datatype or entity) features : Feature Domainmodel
- 15. Demo 1. datatype String 2. 3. entity Blog { 4. title: String 5. many posts: Post 6. } 7. 8. entity HasAuthor { 9. author: String 10. } 11. 12. entity Post extends HasAuthor { 13. title: String 14. content: String 15. many comments: Comment 16. } 17. 18. entity Comment extends HasAuthor { 19. content: String 20. }
- 16. Live Demo
- 17. Why Xtext Very mature and complete system Statically typed AST model Open Source
- 18. Outro DSLs? ●Very powerful ●Lots of work Xtext ●Recommended DSL development framework Sigasi is hiring: www.sigasi.com/careers
- 19. Hands on Download Eclipse IDE for Java and DSL Developers https://www.eclipse.org/downloads/ Start 15 Minutes tutorial from https://eclipse.org/Xtext/documentation/102_domainmodelwalkthrough.html