Better handle multiple definitions from Source Link in GTD

[davidwengier]

A single type could be spread over multiple source files, but Roslyn currently only supports navigating to one initially. Subsequent navigations correctly bring up the Find References window and allow the user to select .

Right now you can workaround this limitation by executing a GTD on a type symbol, for example, and then F12ing again on the type symbol once you have been navigated.

When a source link file is opened from the Find References window in this way, and presumably once the multiple results work up front, the tab for the document is not correct, and the tab is not opened as readonly.

[davidwengier]

Related feedback:

https://developercommunity.visualstudio.com/t/Cant-view-full-API-after-F12-on-a-parti/1672379

[davidwengier]

https://github.com/TerraFX/TerraFX is a good sample project for this. TerraFX.Interop.Windows.Windows is a ~240k line file split across multiple ~1-3k line partial files, so current navigation experience reported by @tannergooding is pretty poor.

[davidwengier]

Worth considering https://github.com/dotnet/roslyn/pull/61205/files/90898165014cc3339697e13898261a56c1e1106d#r874908155 when this is done, as it will likely involve more UI affecting oddness

[Sergio0694]

+1 to this, I've just hit this with ComputeSharp.D2D1.Uwp (https://github.com/Sergio0694/ComputeSharp), as I have the PixelShaderEffect<T> type which is split into 6-7 partial files (see here). CTRL + click just opens the first one, and then trying to do that again or pressing F12 just doesn't do anything. Interestingly, I do see the full list of members from the drop down in the top right, but if I try to click on any member from another partial file for the type, I just get this error dialog:

So essentially I'm completely unable to open the source for any of those methods and set breakpoints there 🥲