Types with duplicated names across multiple namespaces do not map

[andrew-boyarshin]

Feels like we have a type deduplication malfunctioning. Some rogue HashSet comparator? Vortice.DXGI.WinUI for reference.

  <include file="windows.ui.xaml.media.dxinterop.h" namespace="Vortice.DXGI" attach="true" />
  <include file="microsoft.ui.xaml.media.dxinterop.h" namespace="Vortice.DXGI.WinUI" output="WinUI" />

Does not generate IVirtualSurfaceImageSourceNative and the rest that are duplicated across these headers. TODO: Investigate for 2.0.

[andrew-boyarshin]

@amerkoleci FYI this is a blocker for Vortice 2.0 migration.

[amerkoleci]

Right, when I added WinUI bindings i had to manually wrap those types as the namespace was ignored and only the name was considered

[andrew-boyarshin]

Yeah. After a brief investigation, that's actually headers fault. :) __IVirtualSurfaceImageSourceNative_FWD_DEFINED__ and the rest of the preprocessor definitions are the same in both windows.*.h and microsoft.*.h, so including them both from the same header will yield only the definition from the first header in the inclusion order. There is no way to fix that, unless we provide a way to split generated .h file (CppHeaderGenerator) into multiple, process each with CastXML separately (CastXmlRunner), then merge the results (CppParser). That's non-trivial, and I have no time to implement this in the foreseeable future.

Workaround is to split into multiple assemblies.

[amerkoleci]

I started new Vortice.WinUI but types doesn't get generated even in new assembly, my Vortice.WinUI depends on Vortice.DXGI which blocks the WinUI types generations cause ISwapChainBackgroundPanelNative_INTERFACE_DEFINED etc.

How can I workaround this?

[amerkoleci]

I've tried to workaround by modifying the header with:
ISwapChainBackgroundPanelNative_WINUI_FWD_DEFINED
ISwapChainBackgroundPanelNative_WINUI_INTERFACE_DEFINED

Adding the WINUI but it doesn't work as well

[amerkoleci]

I've had to add manually all code with just GUID changed: amerkoleci/Vortice.Windows@1b769b6