clang plugins (How to control C++0x adoption in a large codebase?)

This reminds me, are there docs on how to write plugins? Or an example
plugin? The idea of having a shared warning/style plugin was something
I talked about with a friend and it'd be interesting to investigate.

The plug-in system is incomplete and undocumented. It's in great need of a champion to push it forward and turn it into something useful.

  - Doug