1. Microsoft Ignite NZ
25-28 October 2016
SKYCITY, Auckland

2. The Power of Roslyn: Improving Your Productivity with Live Code Analyzers
Kasey Uhlenhuth
Program Manager
.NET & Visual Studio
@kuhlenhuth

3. Agenda Introduce Roslyn Demonstrate Analyzers
4/6/ :23 AM
Agenda
Introduce Roslyn
Demonstrate Analyzers
Build an Analyzer (using in-progress IOperation)
Explore Analyzer Ecosystem
© 2014 Microsoft Corporation. All rights reserved. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

4. http://roslyn.io @roslyn Microsoft Ignite 2016 4/6/2019 10:23 AM
© 2016 Microsoft Corporation. All rights reserved. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

5. Microsoft Ignite 2016 4/6/2019 10:23 AM
© 2016 Microsoft Corporation. All rights reserved. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

6. 1 2 Write new features faster Provide open source API
Microsoft Ignite 2016
4/6/ :23 AM 1
Write new features faster 2
Provide open source API
© 2016 Microsoft Corporation. All rights reserved. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

7. 1 Write new features faster Microsoft Ignite 2016 4/6/2019 10:23 AM
© 2016 Microsoft Corporation. All rights reserved. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

8. Tuples
Easily pass around groups of values

9. Pattern matching
Test the shape and content of expressions

10. Local functions
Clean up classes by nesting helpers

11. 2 Provide open source API Microsoft Ignite 2016 4/6/2019 10:23 AM
© 2016 Microsoft Corporation. All rights reserved. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

12. Microsoft Ignite 2016
4/6/ :23 AM
Analyzers identify errors and provide fixes in your code as you type, i.e. without having to wait for a build.
© 2016 Microsoft Corporation. All rights reserved. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

13. Demo Microsoft Ignite 2016 4/6/2019 10:23 AM
© 2016 Microsoft Corporation. All rights reserved. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

14. Analyzer Severities Editor Treatment Build Consequence In Error List
Microsoft Ignite 2016
4/6/ :23 AM
Analyzer Severities
Editor Treatment
Build Consequence
In Error List
Error
Breaks
Yes
Warning
None
Suggestion No
© 2016 Microsoft Corporation. All rights reserved. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

15. VSIX NUGET Microsoft Ignite 2016 4/6/2019 10:23 AM
© 2016 Microsoft Corporation. All rights reserved. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

16. Teach new language features/concepts Introduce best practices for SDK
Enforce code style rules
Identify errors before build
4/6/ :23 AM
© 2014 Microsoft Corporation. All rights reserved. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

17. Syntax and Semantic APIs
4/6/ :23 AM
Syntax and Semantic APIs
Syntax Tree
High-fidelity representation of source code
Semantic Model
Answers semantic questions about syntax
IOperation
In-progress evolution of Roslyn APIs
Provides semantic information
Abstracts over common syntactic shapes
Common representation for C#/VB
Syntax Generator
Can generate source code for both C# and VB
© 2014 Microsoft Corporation. All rights reserved. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

18. Let’s write an analyzer!
4/6/ :23 AM
Let’s write an analyzer!
var a = new int[0];
var a = Array.Empty<int>();
© 2014 Microsoft Corporation. All rights reserved. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

19. Diagnostic Code Fix Microsoft Ignite 2016 4/6/2019 10:23 AM
© 2016 Microsoft Corporation. All rights reserved. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

20. Demo Microsoft Ignite 2016 4/6/2019 10:23 AM
© 2016 Microsoft Corporation. All rights reserved. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

21. 4/6/ :23 AM
Analyzer Ecosystem
FxCopAnalyzers (MSFT):
SonarLint
StyleCopAnalyzers:
CodeCracker
Roslynator
VS Refactoring Essentials:
GCop:
© 2014 Microsoft Corporation. All rights reserved. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

22. Call to Action Write an analyzer! Explore what is in the ecosystem
4/6/ :23 AM
Call to Action
Write an analyzer!
Explore what is in the ecosystem
@kuhlenhuth
© 2014 Microsoft Corporation. All rights reserved. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

23. Related Sessions
C# and Visual Basic Code-focused Development with Visual Studio “15” [M380]

24. 4/6/ :23 AM
© 2014 Microsoft Corporation. All rights reserved. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.