JetBrains MPS: Create a programming language that the whole company can understand. Artem Tikhomirov, JetBrains, CEE-SECR 2017

Watch the benefits of creating a programming language that the whole company can understand. With MPS tool you can build powerful domain specific languages.

Preferred audience are IT consultants, Product & Project Managers, testers and decision makers.

1. JetBrains MPS Create a programming language that the whole company can understand Artem Tikhomirov Software Engineering Conference Russia October 2017, St. Petersburg
2. Domain Specific Languages • A DSL is a focused, processable language for describing a specific concern when building a system in a specific domain • The abstractions and notations used are natural/suitable for the stakeholders who specify that particular concern. Markus Voelter
3. Math
4. How come?
5. DSLs? Who cares? You! DSLs are ubiquitous!
6. Buisness Processes
8. • Health and medicine • Stakeholder integration, Scalable Business, Document Generation + Certification • Finance • Precise Specification and Implementation of Insurance Products („Rules“) • Government • Changing Regulations, Fast Implementation, End User Empowerment • Automotive • Code Complexity, Frameworks (Autosar), Product Lines • Aerospace • Reduction of Accidental Complexity in Code, Process Conformance (Docs) • Robotics • A powerful language and IDE for existing frameworks (Industry Robots, ROS) • Embedded software • Multi-Paradigm Programming, not just Simulink and C • Science • Consistent Derived Documents
9. Most widely adopted DSM tool
10. Too narrow view of programming?
11. Demo • Language to configure voice menu for an answering maching • Jetbrains MPS as a Rich Client Platform • Business value is negligible – Market share of your office assistant is small
12. • Health and medicine • Stakeholder integration, Scalable Business, Document Generation + Certification • Finance • Precise Specification and Implementation of Insurance Products („Rules“) • Government • Changing Regulations, Fast Implementation, End User Empowerment • Automotive • Code Complexity, Frameworks (Autosar), Product Lines • Aerospace • Reduction of Accidental Complexity in Code, Process Conformance (Docs) • Robotics • A powerful language and IDE for existing frameworks (Industry Robots, ROS) • Embedded software • Multi-Paradigm Programming, not just Simulink and C • Science • Consistent Derived Documents
13. Healthcare Software Medical Devices Accessible to Doctors Robustness and Correctness Required To be FDA-certified Needs to run on multiple target platforms • IOS • Android • JavaScript
14. Stakeholders driving the development Physicists Product Management System Engineering / R&D Customer Service Supply Chain Management Management (Business Cases) / Platform- & Release-Strategy
15. SW Experts HW/ FW Software package System Engineering Physicists Product Management Customer Service Installed Software
16. HW/ FW SW Experts Software package System Engineering Physicists Product Management Customer Service Installed Software Code generation space DSL DSL DSL DSL
17. Domain Experts SW Experts Scanner Model / SW
18. Domain Experts SW Experts On demand (automatically) Scanner Model / SW
21. When to DSL? • Complex domain knowledge • Painful translation of expertise from a domain specialist to a programmer – Gap in abstraction level • Not directly related to programming – biology, math, insurance – Verification, analysis, simulation. • Classes of applications – Software factories
22. Typical risks • Language design takes effort – Adds to the cost of the project → need for reuse • Language design skills – Steep learning curve – What goes into the language – How to make it elegant • Proper tooling
24. MPS is an open-source language workbench for DSL development
25. DSM isn't new
26. DSLs with MPS • Abstract Syntax • Concrete Syntax • M2M, M2T • Semantics: Typesystem, Dataflow • IDE integration, UI • Tooling: build, plugins • Evolution/migration • Deployment: custom IDE, RCP
27. DSLs with MPS • Abstract Syntax • Concrete Syntax • M2M, M2T • Semantics: Typesystem, Dataflow • IDE integration, UI • Tooling: build, plugins • Evolution/migration • Deployment: custom IDE, RCP
28. Textual editing R A B C D R R A B C D R R A B C D R Text Text Binary edit parse save editing compile parse Compiler
29. Projectional editing R A B C D R R A B C D R R A B C D R Text Binary edit save editing compile parse Compiler R A B C D R generate
30. Projectional editing R A B C D R R A B C D R R A B C D R Binary edit save editing compile Compiler R A B C D R generate
31. Projectional editing
32. by Jens Nerche @jensnerche Rich syntaxes
33. Tabular notations
34. Symbolic notations
35. Positional notations <no variables> <no parent> <no libraries> <no business objects> <no parent>
36. Multiple switchable notations
37. Combine languages
39. Parsing is the bottleneck … of language expressiveness – Limits the possible syntaxes – Allows only one editable code visualization – Complicates combining languages
40. DSLs with MPS • Abstract Syntax • Concrete Syntax • M2M, M2T • Semantics: Typesystem, Dataflow • IDE integration, UI • Tooling: build, plugins • Evolution/migration • Deployment: custom IDE, RCP
41. Code generation R A B C D R R A B C D R R A B C D R Text Binary edit save editing compile parse Compiler R A B C D R generate
42. Generators Map solutions from a problem domain to an implementation domain • Transform models • Output models or text
43. Compiler analogy do { call(); } while R := A MUL B 01101 10101 Source code Intermediate presentation Machine code repeat turnLeft do { call(); } while DSLs do { call(); } while General-purpose language Source code repeat turnLeft do { call(); } while DSLs Source code
44. OMG/MOF Perspective A B C D R A B C D R A B C D R do { call(); } while Model to Model Model to Text repeat turnLeft do { call(); } while DSLs do { call(); } while General-purpose language Source code A B C D R AST == Model
46. jetbrains.com/mps Thank you for your attention __
47. Books • http://books.campagnelab.org • http://dslbook.org https://www.jetbrains.com/mps/publications