[clang-format] Switch to case-insensitive header matching and use it to

improve support for LLVM-style include sorting.

This really is a collection of improvements to the rules for LLVM
include sorting:
- We have gmock headers now, so it adds support for those to one of the
  categories.
- LLVM does use 'FooTest.cpp' files to test 'Foo.h' so it adds that
  suffix for finding a main header.
- At times the test file's case may not match the header file's case, so
  switch to case-insensitive regex matching of header names.

With this set of changes, I can't spot any misbehaviors when re-sorting
all of LLVM's unittest '#include' lines.

Thanks to Eric and Daniel for help testing and refining the patch during
review!

Differential Revision: https://reviews.llvm.org/D33932

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@306759 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 1 insertions, 1 deletions

diff --git a/include/clang/Format/Format.h b/include/clang/Format/Format.h
index c1b62477ed..5b587a4db0 100644
--- a/include/clang/Format/Format.h
+++ b/include/clang/Format/Format.h
@@ -966,7 +966,7 @@ struct FormatStyle {
   ///   IncludeCategories:
   ///     - Regex:           '^"(llvm|llvm-c|clang|clang-c)/'
   ///       Priority:        2
-  ///     - Regex:           '^(<|"(gtest|isl|json)/)'
+  ///     - Regex:           '^(<|"(gtest|gmock|isl|json)/)'
   ///       Priority:        3
   ///     - Regex:           '.*'
   ///       Priority:        1