Add WPF's C++ sources to source-index

[vatsan-madhavan]

source-indexer/src/index/repositories.props

Lines 29 to 36 in 9bff716

	<Repository Include="wpf">
	<Url>https://github.com/dotnet/wpf</Url>
	<Projects>
	src/Microsoft.DotNet.Wpf/src/*/*.csproj
	</Projects>
	<PrepareCommand>
	$(VsDevCmd) &amp; build
	</PrepareCommand>

Currently, only *.csproj are indexed from https://github.com/dotnet/wpf. WPF consists of .vcxproj (C++, C++/CLI) projects as well - can we include them in indexing as well?

/cc @dotnet/wpf-developers

[alexperovich]

The source indexer doesn't support C++. It doesn't have any way of indexing source code that isn't processable by Roslyn.

[KirillOsenkov]

Yes I'm afraid this is non-actionable without a very significant time investment (is there even a "Roslyn" for C++?).

[weltkante]

It may be possible to look at the managed part of the mixed mode assembly via Roslyn and together with the pdb reassociate the symbols with line numbers in the source? I didn't check which Roslyn API the indexer uses, so I can't judge how much work that would be. Also not as extensive as the full method body indexing but it would be a start which allows to at least navigate the mixed mode managed definitions.

[edit] thinking about it I realize thats only half of what indexing does, you don't get references from C++/CLI to anything else indexed this way, that would require inspecting the IL I guess, which is probably too much work.