1 files changed, 8 insertions, 3 deletions
diff --git a/lib/Format/BreakableToken.h b/lib/Format/BreakableToken.h
index 72bb1e4..eb1f9fd 100644
--- a/lib/Format/BreakableToken.h
+++ b/lib/Format/BreakableToken.h
@@ -14,8 +14,8 @@
 ///
 //===----------------------------------------------------------------------===//
 
-#ifndef LLVM_CLANG_FORMAT_BREAKABLETOKEN_H
-#define LLVM_CLANG_FORMAT_BREAKABLETOKEN_H
+#ifndef LLVM_CLANG_LIB_FORMAT_BREAKABLETOKEN_H
+#define LLVM_CLANG_LIB_FORMAT_BREAKABLETOKEN_H
 
 #include "Encoding.h"
 #include "TokenAnnotator.h"
@@ -212,6 +212,11 @@ private:
   // StartOfLineColumn[i] is the target column at which Line[i] should be.
   // Note that this excludes a leading "* " or "*" in case all lines have
   // a "*" prefix.
+  // The first line's target column is always positive. The remaining lines'
+  // target columns are relative to the first line to allow correct indentation
+  // of comments in \c WhitespaceManager. Thus they can be negative as well (in
+  // case the first line needs to be unindented more than there's actual
+  // whitespace in another line).
   SmallVector<int, 16> StartOfLineColumn;
 
   // The column at which the text of a broken line should start.
@@ -237,4 +242,4 @@ private:
 } // namespace format
 } // namespace clang
 
-#endif // LLVM_CLANG_FORMAT_BREAKABLETOKEN_H
+#endif