VSCode Razor highlighting does not handle nullability well in @code blocks

[tn-5]

As soon as a property is declared that is of a nullable type, i.e. ? suffix, the syntax highlighting of the rest of the file seems to get confused.

Reproduce

• Generate standard template project: dotnet new blazorserver
• Open in VS Code
• Open FetchData.razor
• Observe syntax highlighting correctly highlights WeatherForecast as a class/type

Add nullable field

• Add string? test; before the WeatherForecast declaration
• Observe that the highlighting of WeatherForecast is still correct

Add nullable property

• Add string? test1 {get; set;} before the WeatherForecast declaration
• Observe that the highlighting of WeatherForecastnow reverts to generic text

It does not seem to make any difference if the setting on the project file is enabled or not.

[ChristopherHaws]

I've had to turn off the new Language Services because this has made my tooling completely unusable. I was having to code blind and see if there were errors via build which is no fun.

This project builds successfully but the razor tools break at the ? on line 19:

[NTaylorMullen]

@JoeRobich does O#'s C# grammar support this in VSCode?

[JoeRobich]

No the C# textmate grammar is still quite a bit behind. We would recommend enabling Semantic Highlighting.

[JoeRobich]

@tn-5 Could you open an issue against https://github.com/dotnet/csharp-tmLanguage?

[marinasundstrom]

Good. I also noticed this recently. I think the nullable feature needs some more love in the toolchain if it is gonna be widely adopted.

[AxelBrinck]

I also have this issue :(

[zeekbrown]

I am also having this issue as well.

[ryanbrandenburg]

A note since it seems to have been lost, the issue was filed against csharp-tmLanguage as https://github.com/dotnet/csharp-tmLanguage/issues/191.