clang-format: Improve function declaration detection.

Before:
  ReturnType MACRO
      FunctionName() {}

After:
  ReturnType MACRO
  FunctionName() {}

This fixes llvm.org/PR21404.

I wonder what the motivation for that if-condition was. But as no test
breaks, ...

llvm-svn: 220801

clang/lib/Format/TokenAnnotator.cpp

@@ -1263,8 +1263,7 @@ void TokenAnnotator::annotate(AnnotatedLine &Line) {
 // function declaration.
 static bool isFunctionDeclarationName(const FormatToken &Current) {
   if (Current.Type != TT_StartOfName ||
-      Current.NestingLevel != 0 ||
-      Current.Previous->Type == TT_StartOfName)
+      Current.NestingLevel != 0)
     return false;
   const FormatToken *Next = Current.Next;
   for (; Next; Next = Next->Next) {

clang/unittests/Format/FormatTest.cpp

@@ -5269,6 +5269,8 @@ TEST_F(FormatTest, BreaksLongDeclarations) {
                "LoooooooooooooooooooooooooooooooongFunctionDeclaration();");
   verifyFormat("LoooooooooooooooooooooooooooooooooooooooongReturnType\n"
                "LooooooooooooooooooooooooooooooooooongFunctionDefinition() {}");
+  verifyFormat("LoooooooooooooooooooooooooooooooooooooooongReturnType MACRO\n"
+               "LooooooooooooooooooooooooooooooooooongFunctionDefinition() {}");
   verifyFormat("LoooooooooooooooooooooooooooooooooooooooongReturnType const\n"
                "LooooooooooooooooooooooooooooooooooongFunctionDefinition() {}");
   verifyFormat("decltype(LoooooooooooooooooooooooooooooooooooooooongName)\n"