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A DSL for Your API
This document discusses using a domain-specific language (DSL) to add scripting capabilities to applications. It notes that DSLs are custom languages tailored to an application's needs, and that scripting can provide benefits like automation, agility, and testing. It then introduces ANTLR4 as a tool that has improved parsing and makes building DSLs easier compared to traditional compiler approaches. The document concludes by suggesting building a sample language as an example.
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A DSL for Your API
- 1. A DSL foryour API Presented by Gregory M. Sohl @gregsohl
- 2. What’s a DSL? Alanguage that is specific / custom - to meet your application’s needs
- 3. Why would Iadd scripting to my app? Automation Add agility to your applications Testing
- 4.
- 5. Have you scriptedbefore? CompSci 201 Dragon book
- 6. That’s hard! Handwritten parsers CompSciTheory - There’s dragons in there! Generated parsers / lexers Tools have improved
- 7. Compilers and Interpreters What’sthe difference? What should I build?
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- 9. You said therewere new tools, right? ANTLR4 Who uses it? Salesforce.com - for Apex Hibernate Twitter’s search query language Apache Cassandra Apache Groovy language Team Foundation Server - Source search
- 10. The ANTLR (R)evolution TerenceParr - CompSci prof at University of San Francisco Building language tools since 1989
- 11. The ANTLR4 Advantage Simplifiedgrammar - readability Recursion issues nearly obliviated Automatically rewrites left-recursive rules Generates Parse Trees and Tree Walkers Eliminates need for but still allows code snippets as actions in the grammar file. Generates Listener code - event driven like a SAX parser for XML Generates Visitor code, where you control the walking of the Parse Tree Great documentation BSD License
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