Automatically determine dependent properties with [ObservableProperty] about dotnet HOT 1 CLOSED

This has been proposed before (can't find the issues right now), and it's a scenario we're intentionally not supporting. This is for two main reasons: one is that it hides what's going on and makes it not immediately clear when glancing on a property, which members it's actually notifying. The other is that the suggested implementation would be extremely expensive: we'd have to crawl the accessor bodies of all properties, find all expressions, get the semantic model, get the operation, get the target property symbol, and track that in some way. This is definitely not something we want to introduce into our incremental pipeline, as it would slow things down way too much. Additionally it's not even guaranteed it would always work, for instance, what if you have a property that calls some other method which then returns the value of that property that changed? You'd either have to crawl all method bodies of all invoked methods, or say "this isn't supported" and then fail either silently or with some diagnostics, etc. etc. and then you're just back at square one and with a super convoluted implementation that doesn't even always work anyway.

Thank you for taking the time to write the proposal though! 🙂

from dotnet.