Finding auto-transformable types

Hi,

I have pushed a simplified version of the auto-modernizer I linked a few
days ago to github.

https://github.com/steveire/clang-plugin-test

This version doesn't do replacements, but serves to illustrate some problem
I encountered while attempting to adjust certain declarations and leave
others alone.

Unfortunately the Clang API documentation is not very helpful, so I ended up
just copying things from other locations such as clang-tidy. That doesn't
result in the code doing the right thing, so I'm hoping for some help.

In the repo, there is also a test file

  std::vector<int> v = {1, 2, 4};

  {
  int& three = v[2];
  three = 3;
  }
  {
  int three = v[2];
  three = 3;
  }

The 'int& three' should be replaced with 'auto& three' and the 'int three'
should not be touched.

Can someone help adjust the plugin code to achieve that?

Additionally, I would like to be able to transform

  std::vector<int> v2;
  NotCopyable nc;

into

  auto v2 = std::vector<int>();
  NotCopyable nc;

but I could not figure out how to do that.

Finally, broadly my goal was 'transform to use auto if the rhs type is the
same as the lhs type'. I am wondering if I am missing some simpler way to do
that than the way I've been attempting so far. If you know an easier way,
please let me know.

Thanks,

Steve.

ping? I'm still looking for a hero to help with this.

Thanks,

Steve.