Don't break after a "(" following a binary operator.

Additionally, allow breaking after c-style casts, but with a high
penalty.

Before:
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa *foo = (
    aaaaaaaaaaaaaaaaa *)bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb;
After:
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa *foo = (aaaaaaaaaaaaaaaaa *)
    bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb;

This fixes llvm.org/PR16049.

llvm-svn: 185685
diff --git a/clang/unittests/Format/FormatTest.cpp b/clang/unittests/Format/FormatTest.cpp
index c1fdab7..ed06bac 100644
--- a/clang/unittests/Format/FormatTest.cpp
+++ b/clang/unittests/Format/FormatTest.cpp
@@ -3485,6 +3485,9 @@
   verifyFormat("virtual void foo(int *a, char *) const;");
   verifyFormat("int a = sizeof(int *) + b;");
   verifyFormat("int a = alignof(int *) + b;", getGoogleStyle());
+
+  verifyFormat("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa *foo = (aaaaaaaaaaaaaaaaa *)\n"
+               "    bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb;");
 }
 
 TEST_F(FormatTest, FormatsFunctionTypes) {