Finally separates out importFullName from the Impl, and it now only
relies on relevant Swift and Clang information, but no importer
state. Convenience functionality, better APIs, and more clean up
coming soon.
Pull omitNeedlessWordsInFunctionName off of the Impl, and into a
static function local to ImportName.cpp. Separate it out from the Impl
entirely. Though this adds a couple of extra ugly parameters, it's one
of the last bits of tie-in between importFullName and the Impl.
Introduces new files ClangAdapter.h/cpp, which will serve as a
convenient place to put code reasoning about Clang details. Refactors
out most Clang-related is*, has*, and get* methods from the
ImporterImpl. In the future, an adapter class could help serve to
seperate the concerns of the importer from the details of how to
correctly use Clang APIs.
Refactors much of the import name determination from ClangImporter.cpp
into ImportName.cpp.
This is not a perfect separation, but it's a step in the right
direction. Long term, we'd like to get as much functionality off of
the ClangImporter::Implementation class and onto more specialized and
seperable (and stateless!) components.
