[Bug 55347] New: widl generated winrt headers fails to compile with C++ code

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=55347

Bug ID: 55347
           Summary: widl generated winrt headers fails to compile with C++
                    code
           Product: Wine
           Version: unspecified
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: tools
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

Created attachment 74933
  --> https://bugs.winehq.org/attachment.cgi?id=74933
minimal sample code

If winrt headers are used with C++ code, it fails to compile with both g++ and
clang++. In this case, the error comes from data types of virtual function
parameters. Replacing the data types with fully qualified name fixes the
compiler errors.

In the attachment section, a minimal sample code is added. That code does not
do anything, it's just for compilation testing purpose. It compiles fine with
MSVC/Visual Studio. Firefox is one of the project which is affected by this
issue. Currently, a patch is used with mingw-w64
https://hg.mozilla.org/mozilla-central/file/tip/taskcluster/scripts/misc/min...