Source generators should implement IIncrementalGenerator instead of ISourceGenerator

[sharwell]

The following source generators implement the "V1" API and use a syntax receiver, which requires reprocessing the entire project after every edit to a source file. This behavior quickly and unavoidably overwhelms the IDE for medium to large projects.

Switching to IIncrementalGenerator allows for incremental processing of syntax to avoid this overhead.

• LambdaEventCallbackAnalyzer
• KeyAnalyzer
• EventParameterGenerator
• RequiredParameterAnalyzer
• SetParametersAsyncGenerator

[davkean]

This Visual Studio Developer Community issue was root caused to this: https://developercommunity.visualstudio.com/t/visual-studio-is-near-2022-uselessly-slow-for-me/1638239.

[stefanloerwald]

Thanks for raising this. I can see why incremental generators are superior and wish they had been a thing from earlier on. Unfortunately I don't have the time to transition this project to using them, but I'm happy to review PRs that do so.

Side note: the usefulness of this project of this project is unfortunately limited, since one has to make the trade-off between the razor source generator and this library. Both cannot be used simultaneously, which is a huge shame.