API Request: TypeSymbolExtensions

[OmerRaviv]

Forking this feature request from #16

Original post: #16 (comment) by @MrJul

Pertinent APIs: http://source.roslyn.codeplex.com/#Microsoft.CodeAnalysis.CSharp/Symbols/TypeSymbolExtensions.cs,8f632696b9da5eba

In my team, I've seen different developers copy-paste portions of ITypeSymbolExtensions into our own project (e.g. IsNullableType, GetNullableUnderlyingType , GetBaseTypes ), which is a shame - these methods are a convenience I'm sure many other people will find useful as well.

[AdamSpeight2008]

I could add them to RoslynExts, but it requires other internal class. @OmerRaviv these extension are not on ITypeSymbol but TypeSymbol

[dpoeschl]

Stackoverflow user "Mac" might want to use methods from a similar API, INamedTypeSymbolExtensions. http://stackoverflow.com/questions/28234052/finding-all-class-declarations-than-inherit-from-another-with-roslyn

@AnthonyDGreen Should this be a separate issue, or will we be evaluating a larger set of *Extensions classes as part of this API review?

[wwwlicious]

Thanks David, I've updated the post with the solution I hacked out, not sure if it is using bad practices though so if there is a ready made internal api for this it would be useful.

[wwwlicious]

any progress on this?

[pakdev]

Apparently Microsoft's other project (Roslyn Analyzers) also duplicates some of these extensions.

[CyrusNajmabadi]

A request for this should go through our "api proposal" path. Note that these APIs are unlikely to be exposed as they are really 'feature-level' apis that encode feature semantics and change as necessary. As a public API we would be unable to do that as it would likely break people (or every change would need some way to make it opt-in only, which would greatly increase complexity).