Evaluate the possibility to use Clang instead of regexes to find and manipulate code

[fortinmike]

Some tracks:

• Friday Q&A 2014-01-24: Introduction to libclang
• Modern source-to-source transformation with Clang and libTooling
• Intro to the Clang AST
• LibASTMatchers Tutorial
• Matching the Clang AST

Note to anyone coming across this:

If you have firsthand experience working with the Clang AST / working with Clang to make source-to-source transformations I would be grateful if you could be available for a quick discussion over email or chat. This would help kickstart the feature.

[fortinmike]

Especially relevant in the context of adding Swift support.