[PATCH] D46180: [clang-format] Refactor #include insertion/deletion functionality into a class.

[Eric Liu via Phabricator via cfe-commits]

ioeric created this revision.
ioeric added a reviewer: ilya-biryukov.
Herald added subscribers: cfe-commits, klimek.

The class will be moved into libToolingCore as followup.

The new behaviors in this patch:

- New #include is inserted in the right position in a #include block to

preserver sorted #includes. This is best effort - only works when the
block is already sorted.

- When inserting multiple #includes to the end of a file which doesn't

end with a "\n" character, a "\n" will be prepended to each #include.
This is a special and rare case that was previously handled. This is now
relaxed to avoid complexity as it's rare in practice.


Repository:
  rC Clang

https://reviews.llvm.org/D46180

Files:
  lib/Format/Format.cpp
  unittests/Format/CleanupTest.cpp

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