clang-format: Improve free-standing macro detection.

Before:
  SOME_WEIRD_LOG_MACRO
  << "Something long enough to cause a line break";

After:
  SOME_WEIRD_LOG_MACRO
      << "Something long enough to cause a line break";

llvm-svn: 221338

1 files changed, 5 insertions, 0 deletions

diff --git a/clang/unittests/Format/FormatTest.cpp b/clang/unittests/Format/FormatTest.cpp
index cd832651066..9e63bd11bb3 100644
--- a/clang/unittests/Format/FormatTest.cpp
+++ b/clang/unittests/Format/FormatTest.cpp
@@ -2569,6 +2569,11 @@ TEST_F(FormatTest, MacrosWithoutTrailingSemicolon) {
                    "     Q_Object\n"
                    "  A() {\n}\n"
                    "}  ;"));
+
+  // Only if the next line can actually start an unwrapped line.
+  EXPECT_EQ("SOME_WEIRD_LOG_MACRO << SomeThing;",
+            format("SOME_WEIRD_LOG_MACRO\n"
+                   "<< SomeThing;"));
 }
 
 TEST_F(FormatTest, MacroCallsWithoutTrailingSemicolon) {