C# – Report viewer tag missing in toolbox Visual Studio 2015

It took far too long but I finally found this document on Migrating MSBuild-Integrated solutions to Automatic Package Restore and I was able to resolve the issue using the methods described here.

1. Remove the '.nuget' solution directory along from the solution
2. Remove all references to nuget.targets from your .csproj or .vbproj files. Though not officially supported, the document links to a PowerShell script if you have a lot of projects which need to be cleaned up. I manually edited mine by hand so I can't give any feedback regarding my experience with it.

When editing your files by hand, here's what you'll be looking for:

Solution File (.sln)

Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = ".nuget", ".nuget", "{F4AEBB8B-A367-424E-8B14-F611C9667A85}"
ProjectSection(SolutionItems) = preProject
    .nuget\NuGet.Config = .nuget\NuGet.Config
    .nuget\NuGet.exe = .nuget\NuGet.exe
    .nuget\NuGet.targets = .nuget\NuGet.targets
EndProjectSection
EndProject

Project File (.csproj / .vbproj)

  <Import Project="$(SolutionDir)\.nuget\NuGet.targets" Condition="Exists('$(SolutionDir)\.nuget\NuGet.targets')" />
  <Target Name="EnsureNuGetPackageBuildImports" BeforeTargets="PrepareForBuild">
    <PropertyGroup>
      <ErrorText>This project references NuGet package(s) that are missing on this computer. Enable NuGet Package Restore to download them.  For more information, see http://go.microsoft.com/fwlink/?LinkID=322105. The missing file is {0}.</ErrorText>
    </PropertyGroup>
    <Error Condition="!Exists('$(SolutionDir)\.nuget\NuGet.targets')" Text="$([System.String]::Format('$(ErrorText)', '$(SolutionDir)\.nuget\NuGet.targets'))" />
  </Target>

My first answer misunderstood the question completely, so let's try this again.

Your central problem is the free type parameter T in the definition of doCallback. As you point out in your question, there's no way to make a SWIG object out of a shared_ptr<T> without a concrete value for T: shared_ptr<T> isn't really a type.

Thus I think that you have to specialize: for each concrete instantiation of doCallback that the host system uses, provide a template specialization for the target type. With that done, you can generate a Python-friendly wrapping of data, and pass it to your python function. The simplest technique for that is probably:

swigData = SWIG_NewPointerObj((void*)(data.get()), SWIGType_Whatever, 0);

...though this can only work if your Python function doesn't save its argument anywhere, as the shared_ptr itself is not copied.

If you do need to retain a reference to data, you'll need to use whatever mechanism SWIG usually uses to wrap shared_ptr. If there's no special-case smart-pointer magic going on, it's probably something like:

pythonData = new shared_ptr<Whatever>(data);
swigData = SWIG_NewPointerObj(pythonData, SWIGType_shared_ptr_to_Whatever, 1);

Regardless, you then you have a Python-friendly SWIG object that's amenable to Py_BuildValue().

Hope this helps.