Fix counting of parameters so that r175162 works as expected.

Before:
aaaaaaaaaaaaaaaaaaaaaaaa(aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa()
                              .aaaaaaaaaaaaaaaaa());

After:
aaaaaaaaaaaaaaaaaaaaaaaaa(
    aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa().aaaaaaaaaaaaaaaaa());

Not sure which of the formattings above is better, but we should not pick
one by accident.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@175165 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Format/TokenAnnotator.cpp

@@ -107,8 +107,7 @@ class AnnotatingParser {
       if (CurrentToken->is(tok::pipepipe) || CurrentToken->is(tok::ampamp) ||
           CurrentToken->is(tok::question) || CurrentToken->is(tok::colon))
         return false;
-      if (CurrentToken->is(tok::comma))
-        ++Left->ParameterCount;
+      updateParameterCount(Left, CurrentToken);
       if (!consumeToken())
         return false;
     }
@@ -175,8 +174,7 @@ class AnnotatingParser {
       }
       if (CurrentToken->is(tok::r_square) || CurrentToken->is(tok::r_brace))
         return false;
-      if (CurrentToken->is(tok::comma))
-        ++Left->ParameterCount;
+      updateParameterCount(Left, CurrentToken);
       if (!consumeToken())
         return false;
     }
@@ -240,8 +238,7 @@ class AnnotatingParser {
       }
       if (CurrentToken->is(tok::r_paren) || CurrentToken->is(tok::r_brace))
         return false;
-      if (CurrentToken->is(tok::comma))
-        ++Left->ParameterCount;
+      updateParameterCount(Left, CurrentToken);
       if (!consumeToken())
         return false;
     }
@@ -263,13 +260,19 @@ class AnnotatingParser {
       }
       if (CurrentToken->is(tok::r_paren) || CurrentToken->is(tok::r_square))
         return false;
-      if (CurrentToken->is(tok::comma))
-        ++Left->ParameterCount;
+      updateParameterCount(Left, CurrentToken);
       if (!consumeToken())
         return false;
     }
     return true;
   }
+
+  void updateParameterCount(AnnotatedToken *Left, AnnotatedToken *Current) {
+    if (Current->is(tok::comma))
+      ++Left->ParameterCount;
+    else if (Left->ParameterCount == 0 && Current->isNot(tok::comment))
+      Left->ParameterCount = 1;
+  }
 
   bool parseConditional() {
     while (CurrentToken != NULL) {

lib/Format/TokenAnnotator.h

@@ -73,7 +73,7 @@ class AnnotatedToken {
       : FormatTok(FormatTok), Type(TT_Unknown), SpacesRequiredBefore(0),
         CanBreakBefore(false), MustBreakBefore(false),
         ClosesTemplateDeclaration(false), MatchingParen(NULL),
-        ParameterCount(1), BindingStrength(0), SplitPenalty(0),
+        ParameterCount(0), BindingStrength(0), SplitPenalty(0),
         LongestObjCSelectorName(0), Parent(NULL), FakeLParens(0),
         FakeRParens(0) {
   }

unittests/Format/FormatTest.cpp

@@ -1453,6 +1453,10 @@ TEST_F(FormatTest, WrapsAtFunctionCallsIfNecessary) {
       "aaaaaaaaaaa->aaaaaaaaa(\n"
       "    aaaaaaaaaaaaaaaaaaaaaaaaa,\n"
       "    aaaaaaaaaaaaaaaaaa->aaaaaaaaa(aaaaaaaaaaaaaaaaaaaaaaaaa));\n");
+
+  verifyFormat(
+      "aaaaaaaaaaaaaaaaaaaaaaaaa(\n"
+      "    aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa().aaaaaaaaaaaaaaaaa());");
 }
 
 TEST_F(FormatTest, WrapsTemplateDeclarations) {