[PATCH] D42135: [Format] Improve ObjC header guessing heuristic

[Ben Hamilton via Phabricator via cfe-commits]

benhamilton updated this revision to Diff 130202.
benhamilton added a comment.

Use unordered_set, consolidate at-token checks


Repository:
  rC Clang

https://reviews.llvm.org/D42135

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

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