clang-format: Implemented tab usage for continuation and indentation

Use tabs to fill whitespace at the start of a line.

Patch by Maxime Beaulieu

Differential Revision: http://reviews.llvm.org/D19028

llvm-svn: 266320

1 files changed, 8 insertions, 0 deletions

diff --git a/clang/lib/Format/WhitespaceManager.cpp b/clang/lib/Format/WhitespaceManager.cpp
index 0673dfb3ace..9cdba9df10a 100644
--- a/clang/lib/Format/WhitespaceManager.cpp
+++ b/clang/lib/Format/WhitespaceManager.cpp
@@ -558,6 +558,14 @@ void WhitespaceManager::appendIndentText(std::string &Text,
     }
     Text.append(Spaces, ' ');
     break;
+  case FormatStyle::UT_ForContinuationAndIndentation:
+    if (WhitespaceStartColumn == 0) {
+      unsigned Tabs = Spaces / Style.TabWidth;
+      Text.append(Tabs, '\t');
+      Spaces -= Tabs * Style.TabWidth;
+    }
+    Text.append(Spaces, ' ');
+    break;
   }
 }