generate-helper-types with single-file is broken

[mgood7123]

PS D:\IMPORTANT\source\repos\WindowsProject1\AndroidUI.Native> ls


    Directory: D:\IMPORTANT\source\repos\WindowsProject1\AndroidUI.Native


Mode                 LastWriteTime         Length Name
----                 -------------         ------ ----
-a----         4/20/2022   8:12 PM           1518 AndroidUI.Native.vcxitems
-a----         4/19/2022   5:09 PM           1378 TmpPtr.h
-a----         4/20/2022   8:14 PM          47296 SkXn.h
-a----         4/20/2022  10:20 PM             39 a.cs
-a----         4/18/2022   5:24 PM          21738 SkTypes.h
-a----         4/20/2022   7:09 PM           3392 SkNx_IMPL.cpp
-a----         4/14/2022   1:33 PM           1521 SkSafe_math.h
-a----         4/14/2022   1:43 PM           2700 SkFloatBits.h
-a----         4/14/2022   1:44 PM           6877 SkScalar.h
-a----         4/20/2022   8:12 PM            885 AndroidUI.Native.vcxitems.filters
-a----         4/14/2022   1:40 PM          10111 SkFloatingPoint.h
-a----         4/17/2022   2:19 PM          30147 SkNx_sse.h
-a----         4/17/2022   2:22 PM          23245 SkNx_neon.h


PS D:\IMPORTANT\source\repos\WindowsProject1\AndroidUI.Native> ClangSharpPInvokeGenerator.exe -f .\SkXn.h -l "runtimes/win-x64/native/AndroidUI.Native.Windows.dll"           -n Bindings -m Windows -c compatible-codegen -c generate-helper-types -o I_DO_NOT_EXIST.cs
Processing '.\SkXn.h'
Diagnostics for binding generation of .\SkXn.h:
    Error (Line 35, Column 11 in ./SkXn.h): Unsupported anonymous named declaration: 'Namespace'.
    Error (Line 173, Column 12 in ./SkXn.h): Unsupported declaration: 'ClassTemplatePartialSpecialization'. Generated bindings may be incomplete.
Unhandled exception: System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation.
 ---> System.IO.IOException: Cannot create 'D:\IMPORTANT\source\repos\WindowsProject1\AndroidUI.Native\I_DO_NOT_EXIST.cs' because a file or directory with the same name already exists.
   at System.IO.FileSystem.CreateDirectory(String fullPath, Byte[] securityDescriptor)
   at System.IO.Directory.CreateDirectory(String path)
   at ClangSharp.PInvokeGenerator.Close() in /_/sources/ClangSharp.PInvokeGenerator/PInvokeGenerator.cs:line 270
   at ClangSharp.PInvokeGenerator.Dispose(Boolean isDisposing) in /_/sources/ClangSharp.PInvokeGenerator/PInvokeGenerator.cs:line 1689
   at ClangSharp.Program.Run(InvocationContext context) in /_/sources/ClangSharpPInvokeGenerator/Program.cs:line 648
   --- End of inner exception stack trace ---
   at System.RuntimeMethodHandle.InvokeMethod(Object target, Span`1& arguments, Signature sig, Boolean constructor, Boolean wrapExceptions)
   at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
   at System.Reflection.MethodBase.Invoke(Object obj, Object[] parameters)
   at System.CommandLine.Invocation.ModelBindingCommandHandler.InvokeAsync(InvocationContext context)
   at System.CommandLine.Invocation.InvocationPipeline.<>c__DisplayClass4_0.<<BuildInvocationChain>b__0>d.MoveNext()
--- End of stack trace from previous location ---
   at System.CommandLine.Builder.CommandLineBuilderExtensions.<>c__DisplayClass23_0.<<UseParseErrorReporting>b__0>d.MoveNext()
--- End of stack trace from previous location ---
   at System.CommandLine.Builder.CommandLineBuilderExtensions.<>c__DisplayClass16_0.<<UseHelp>b__0>d.MoveNext()
--- End of stack trace from previous location ---
   at System.CommandLine.Builder.CommandLineBuilderExtensions.<>c__DisplayClass25_0.<<UseTypoCorrections>b__0>d.MoveNext()
--- End of stack trace from previous location ---
   at System.CommandLine.Builder.CommandLineBuilderExtensions.<>c.<<UseSuggestDirective>b__24_0>d.MoveNext()
--- End of stack trace from previous location ---
   at System.CommandLine.Builder.CommandLineBuilderExtensions.<>c__DisplayClass22_0.<<UseParseDirective>b__0>d.MoveNext()
--- End of stack trace from previous location ---
   at System.CommandLine.Builder.CommandLineBuilderExtensions.<>c__DisplayClass11_0.<<UseDebugDirective>b__0>d.MoveNext()
--- End of stack trace from previous location ---
   at System.CommandLine.Builder.CommandLineBuilderExtensions.<>c.<<RegisterWithDotnetSuggest>b__10_0>d.MoveNext()
--- End of stack trace from previous location ---
   at System.CommandLine.Builder.CommandLineBuilderExtensions.<>c__DisplayClass14_0.<<UseExceptionHandler>b__0>d.MoveNext()
PS D:\IMPORTANT\source\repos\WindowsProject1\AndroidUI.Native> ls


    Directory: D:\IMPORTANT\source\repos\WindowsProject1\AndroidUI.Native


Mode                 LastWriteTime         Length Name
----                 -------------         ------ ----
-a----         4/20/2022   8:12 PM           1518 AndroidUI.Native.vcxitems
-a----         4/19/2022   5:09 PM           1378 TmpPtr.h
-a----         4/20/2022   8:14 PM          47296 SkXn.h
-a----         4/20/2022  10:20 PM             39 a.cs
-a----         4/18/2022   5:24 PM          21738 SkTypes.h
-a----         4/20/2022   7:09 PM           3392 SkNx_IMPL.cpp
-a----         4/20/2022  10:21 PM             39 I_DO_NOT_EXIST.cs
-a----         4/14/2022   1:33 PM           1521 SkSafe_math.h
-a----         4/14/2022   1:43 PM           2700 SkFloatBits.h
-a----         4/14/2022   1:44 PM           6877 SkScalar.h
-a----         4/20/2022   8:12 PM            885 AndroidUI.Native.vcxitems.filters
-a----         4/14/2022   1:40 PM          10111 SkFloatingPoint.h
-a----         4/17/2022   2:19 PM          30147 SkNx_sse.h
-a----         4/17/2022   2:22 PM          23245 SkNx_neon.h


PS D:\IMPORTANT\source\repos\WindowsProject1\AndroidUI.Native>

[nike4613]

This still appears to be an issue. The generated code includes using and namespace declarations within the single-file namespace.