Break after multiline parameters.

We do this in general, but missed a few cases.

Before:
void aaaaaaaaaaaaaaaaaaaaaaa(
    aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
        aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa, bbbb bbbb);

After:
void aaaaaaaaaaaaaaaaaaaaaaa(
    aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
        aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa,
    bbbb bbbb);

llvm-svn: 179570

clang/lib/Format/Format.cpp

@@ -406,7 +406,9 @@ private:
       for (unsigned i = 0, e = State.Stack.size() - 1; i != e; ++i) {
         State.Stack[i].BreakBeforeParameter = true;
       }
-      if (Current.isOneOf(tok::period, tok::arrow))
+      const AnnotatedToken *TokenBefore = Current.getPreviousNoneComment();
+      if (TokenBefore && !TokenBefore->isOneOf(tok::comma, tok::semi) &&
+          !TokenBefore->opensScope())
         State.Stack.back().BreakBeforeParameter = true;
 
       // If we break after {, we should also break before the corresponding }.

clang/unittests/Format/FormatTest.cpp

@@ -1740,6 +1740,12 @@ TEST_F(FormatTest, BreaksFunctionDeclarations) {
                "    Cccccccccccccc cccccccccc, Cccccccccccccc cccccccccc,\n"
                "    Cccccccccccccc cccccccccc, Cccccccccccccc cccccccccc,\n"
                "    Cccccccccccccc cccccccccc, Cccccccccccccc cccccccccc);");
+
+  // Break after multi-line parameters.
+  verifyFormat("void aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(\n"
+               "    aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\n"
+               "        aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa,\n"
+               "    bbbb bbbb);");
 }
 
 TEST_F(FormatTest, BreaksDesireably) {