NFC: add a test case for the root cause

Author: owenca

clang/unittests/Format/TokenAnnotatorTest.cpp

@@ -1119,6 +1119,11 @@ TEST_F(TokenAnnotatorTest, UnderstandsOverloadedOperators) {
   EXPECT_TOKEN(Tokens[8], tok::amp, TT_PointerOrReference);
   EXPECT_TOKEN(Tokens[12], tok::amp, TT_PointerOrReference);
 
+  Tokens = annotate("::foo::bar& ::foo::bar::operator=(::foo::bar& other);");
+  ASSERT_EQ(Tokens.size(), 22u) << Tokens;
+  EXPECT_TOKEN(Tokens[6], tok::identifier, TT_FunctionDeclarationName);
+  EXPECT_TOKEN(Tokens[17], tok::amp, TT_PointerOrReference);
+
   Tokens = annotate("SomeLoooooooooooooooooType::Awaitable\n"
                     "SomeLoooooooooooooooooType::operator co_await();");
   ASSERT_EQ(Tokens.size(), 11u) << Tokens;
@@ -2344,11 +2349,6 @@ TEST_F(TokenAnnotatorTest, UnderstandsFunctionDeclarationNames) {
   EXPECT_TOKEN(Tokens[2], tok::identifier, TT_FunctionDeclarationName);
   EXPECT_TOKEN(Tokens[3], tok::l_paren, TT_FunctionDeclarationLParen);
 
-  Tokens = annotate("::foo::bar& ::foo::bar::operator=(::foo::bar& other);");
-  ASSERT_EQ(Tokens.size(), 22u) << Tokens;
-  EXPECT_TOKEN(Tokens[6], tok::identifier, TT_FunctionDeclarationName);
-  EXPECT_TOKEN(Tokens[17], tok::amp, TT_PointerOrReference);
-
   Tokens = annotate("int iso_time(time_t);");
   ASSERT_EQ(Tokens.size(), 7u) << Tokens;
   EXPECT_TOKEN(Tokens[1], tok::identifier, TT_FunctionDeclarationName);
@@ -3489,6 +3489,10 @@ TEST_F(TokenAnnotatorTest, StartOfName) {
   ASSERT_EQ(Tokens.size(), 8u) << Tokens;
   EXPECT_TOKEN(Tokens[2], tok::identifier, TT_Unknown); // Not StartOfName
 
+  Tokens = annotate("int* ::foo::bar;");
+  ASSERT_EQ(Tokens.size(), 8u) << Tokens;
+  EXPECT_TOKEN(Tokens[3], tok::identifier, TT_StartOfName);
+
   auto Style = getLLVMStyle();
   Style.StatementAttributeLikeMacros.push_back("emit");
   Tokens = annotate("emit foo = 0;", Style);