clang-format: [ObjC] Wrap ObjC method declarations before annotations.

Before:
  - (instancetype)initXxxxxxxxxxxxxxxxxxxxxxxxx:(id<x>)x
                                              y:(id<yyyyyyyyyyyyyyyyyyyy>)
                                                    y NS_DESIGNATED_INITIALIZER;
After:
  - (instancetype)initXxxxxxxxxxxxxxxxxxxxxxxxx:(id<x>)x
                                              y:(id<yyyyyyyyyyyyyyyyyyyy>)y
      NS_DESIGNATED_INITIALIZER;

llvm-svn: 219564

clang/lib/Format/TokenAnnotator.cpp

@@ -1432,6 +1432,11 @@ unsigned TokenAnnotator::splitPenalty(const AnnotatedLine &Line,
 
   if (Right.Type == TT_TrailingAnnotation &&
       (!Right.Next || Right.Next->isNot(tok::l_paren))) {
+    // Moving trailing annotations to the next line is fine for ObjC method
+    // declarations.
+    if (Line.First->Type == TT_ObjCMethodSpecifier)
+
+      return 10;
     // Generally, breaking before a trailing annotation is bad unless it is
     // function-like. It seems to be especially preferable to keep standard
     // annotations (i.e. "const", "final" and "override") on the same line.

clang/unittests/Format/FormatTest.cpp

@@ -6452,6 +6452,10 @@ TEST_F(FormatTest, FormatObjCMethodDeclarations) {
                "    evenLongerKeyword:(float)theInterval\n"
                "                error:(NSError **)theError {\n"
                "}");
+  verifyFormat("- (instancetype)initXxxxxx:(id<x>)x\n"
+               "                         y:(id<yyyyyyyyyyyyyyyyyyyy>)y\n"
+               "    NS_DESIGNATED_INITIALIZER;",
+               getLLVMStyleWithColumns(60));
 }
 
 TEST_F(FormatTest, FormatObjCMethodExpr) {