building DSLs with language workbenches NEAL FORD software architect - - PowerPoint PPT Presentation

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building DSLs with language workbenches NEAL FORD software architect - - PowerPoint PPT Presentation

Sep 17, 2023 248 likes •851 views

Thought Works Thought Works building DSLs with language workbenches NEAL FORD software architect / meme wrangler Thought Works nford@thoughtworks.com 3003 Summit Boulevard, Atlanta, GA 30319 www.nealford.com www.thoughtworks.com

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ThoughtWorks ThoughtWorks

NEAL FORD software architect / meme wrangler

ThoughtWorks

nford@thoughtworks.com

3003 Summit Boulevard, Atlanta, GA 30319

www.nealford.com www.thoughtworks.com memeagora.blogspot.com

building DSLs with language workbenches

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ThoughtWorks

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generation templates language workbenches building grammars or pseudo-grammars using workbench DSLs generation

  • verview
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Xtext (openArchitectureWare) a tool that supports language oriented programming Intentional Software (Charles Simonyi) MPS (JetBrains)

language workbenches

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class Foo { private int id; . . . . . . }

Editable Representation Storage Representation Executable Representation Parse Compile

compilation since cs-101

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first java ide to edit the abstract syntax directly enables refactoring

“post- ide’s”

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workbenches

class Foo { private int id; . . . . . . }

Executable Representation Workbench Versioning Storage Editable Representation Storage Representation

Tab Tab Tab

Document Window

Label

Menu Text Field Text Field Text Field Text Field Text Field Text Field

Label Label

  • Label

Text Field

Projections

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grammars

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  • Ms. Grant’s secret panel
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the DSL

events doorClosed D1CL drawOpened D2OP end commands unlockPanel PNUL lockPanel PNLK end

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the grammar

list : eventList commandList; eventList : 'events' eventDec* 'end'; eventDec : identifier identifier; commandList : 'commands' commandDec* 'end'; commandDec : identifier identifier;

events doorClosed D1CL drawOpened D2OP end commands unlockPanel PNUL lockPanel PNLK end

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you provide a grammar in their format framework/tool for development of external textual DSLs based on openArchitectureWare Xtext produces: ANTLR grammar, parser, abstract syntax tree meta-model, and Eclipse editor

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Xtext project

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Xtext artifacts

DSL source generated source meta-data for editor plug-in editor plug-in generators

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ANTLR grammar

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ANTLR grammar

. . .

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code generation

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templates

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template file

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template

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main()

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templates

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eclipse editor

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heavily Eclipse based (editors, project structure, etc.) most mature of the text-based DSL tools still extricating itself from

  • penArchitectureware & MDA background

nice editor projection (acts like source file) efficient generation of DSL, grammar, code generation, & templates

Xtext

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...but the other guys do the same thing competition is brutal! incentives to encourage repeat customers... easy to define & change flexible business rules

bakery life

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establishing profiles

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discounts

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discount

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discount implementation

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getDiscount()

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used internally to build new products internal project by JetBrains based on lessons learned with IntelliJ actively used now for 3+ years created by Sergey Dmitriev & Konstantin Solomatov

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new MPS project

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also editors, code generators fundamental building block like a class: data, behavior, encapsulation properties, events, methods, and links implemented in base language

concepts

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concept declaration

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concept editor

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concept editor

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smart help

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discount

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reduction rule mapping

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reduction template

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discount template

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using the editor

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code generation

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grammar? encapsulated within

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refactoring

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find usages

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found usages

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MPS is written in MPS

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composition

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composing DSLs

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comparisons

Xtext MPS Intentional grammar EBNF/antlr encapsulated ? environment Eclipse MPS ? code generation via Eclipse via MPS or IntelliJ internal projections EMF & text text-like (for now) rich project ecosystem Eclipse MPS ? availability now!

  • pen source

soon

  • pen source

? commercial

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ThoughtWorks

This work is licensed under the Creative Commons Attribution-Noncommercial-Share Alike 2.5 License. http://creativecommons.org/licenses/by-nc-sa/2.5/

questions?

please fill out the session evaluations slides & samples available at nealford.com

NEAL FORD software architect / meme wrangler

ThoughtWorks

nford@thoughtworks.com

3003 Summit Boulevard, Atlanta, GA 30319

www.nealford.com www.thoughtworks.com memeagora.blogspot.com

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resources

ThoughtWorks

MPS http://www.jetbrains.com/mps/ Intentional Softare http://www.intentsoft.com/ Xtext http://wiki.eclipse.org/Xtext Martin Fowler’s DSL Work in Progress http://martinfowler.com/dslwip/