[PATCH] D151578: [Format/ObjC] Support NS_ASSUME_NONNULL_BEGIN and FOUNDATION_EXPORT in ObjC language guesser

[Ben Hamilton via Phabricator via cfe-commits]

benhamilton created this revision.
benhamilton added a reviewer: MyDeveloperDay.
Herald added projects: All, clang, clang-format.
Herald added a subscriber: cfe-commits.
Herald added reviewers: rymiel, HazardyKnusperkeks, owenpan.
benhamilton requested review of this revision.

This adds to the ObjC language guesser a few more common macros used
in ObjC headers. These can help distinguish ObjC headers which
otherwise lack ObjC types from C++ headers.

Contributed by danblakemore.

Tested:

  New tests included. Ran unit tests with:
  ```
  % cmake -S llvm -B build -G Ninja && \
    ninja -C build FormatTests && \
    ./build/tools/clang/unittests/Format/FormatTests --gtest_filter="*FormatTestObjC*"
  
  (snip)
  [----------] 24 tests from FormatTestObjC (265 ms total)
  
  [----------] Global test environment tear-down
  [==========] 26 tests from 2 test suites ran. (270 ms total)
  [  PASSED  ] 26 tests.
  ```


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D151578

Files:
  clang/lib/Format/Format.cpp
  clang/test/Format/dump-config-objc-macros.h
  clang/unittests/Format/FormatTestObjC.cpp


Index: clang/unittests/Format/FormatTestObjC.cpp
===================================================================
--- clang/unittests/Format/FormatTestObjC.cpp
+++ clang/unittests/Format/FormatTestObjC.cpp
@@ -94,6 +94,20 @@
   ASSERT_TRUE((bool)Style);
   EXPECT_EQ(FormatStyle::LK_ObjC, Style->Language);
 
+  Style = getStyle("{}", "a.h", "none", R"objc(
+NS_ASSUME_NONNULL_BEGIN
+extern int i;
+NS_ASSUME_NONNULL_END
+)objc");
+  ASSERT_TRUE((bool)Style);
+  EXPECT_EQ(FormatStyle::LK_ObjC, Style->Language);
+
+  Style = getStyle("{}", "a.h", "none", R"objc(
+FOUNDATION_EXTERN void DoStuff(void);
+)objc");
+  ASSERT_TRUE((bool)Style);
+  EXPECT_EQ(FormatStyle::LK_ObjC, Style->Language);
+
   Style = getStyle("{}", "a.h", "none", "enum Foo {};");
   ASSERT_TRUE((bool)Style);
   EXPECT_EQ(FormatStyle::LK_Cpp, Style->Language);
Index: clang/test/Format/dump-config-objc-macros.h
===================================================================
--- /dev/null
+++ clang/test/Format/dump-config-objc-macros.h
@@ -0,0 +1,8 @@
+// RUN: clang-format -dump-config %s | FileCheck %s
+
+// CHECK: Language: ObjC
+NS_ASSUME_NONNULL_BEGIN
+
+FOUNDATION_EXPORT int kConstant;
+
+NS_ASSUME_NONNULL_END
Index: clang/lib/Format/Format.cpp
===================================================================
--- clang/lib/Format/Format.cpp
+++ clang/lib/Format/Format.cpp
@@ -2687,6 +2687,7 @@
         "CGSizeMake",
         "CGVector",
         "CGVectorMake",
+        "FOUNDATION_EXTERN",
         "NSAffineTransform",
         "NSArray",
         "NSAttributedString",
@@ -2743,6 +2744,7 @@
         "NSURLQueryItem",
         "NSUUID",
         "NSValue",
+        "NS_ASSUME_NONNULL_BEGIN",
         "UIImage",
         "UIView",
     };


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