Add option to align escaped newlines left.

This enables formattings like:

  #define A   \
    int aaaa; \
    int b;    \
    int ccc;  \
    int dddddddddd;

Enabling this for Google/Chromium styles only as I don't know whether it
is desired for Clang/LLVM.

llvm-svn: 180253

1 files changed, 24 insertions, 10 deletions

diff --git a/clang/lib/Format/WhitespaceManager.h b/clang/lib/Format/WhitespaceManager.h
index 2833e249c42..5f3dc55edac 100644
--- a/clang/lib/Format/WhitespaceManager.h
+++ b/clang/lib/Format/WhitespaceManager.h
@@ -1,4 +1,4 @@
-//===--- WhitespaceManager.h - Format C++ code ----------------------------===//
+//===--- WhitespaceManager.h - Format C++ code ------------------*- C++ -*-===//
 //
 //                     The LLVM Compiler Infrastructure
 //
@@ -68,31 +68,45 @@ public:
 
   /// \brief Try to align all stashed comments.
   void alignComments();
+  /// \brief Try to align all stashed escaped newlines.
+  void alignEscapedNewlines();
 
 private:
   std::string getNewLineText(unsigned NewLines, unsigned Spaces);
 
   std::string getNewLineText(unsigned NewLines, unsigned Spaces,
-                             unsigned WhitespaceStartColumn);
-
-  /// \brief Structure to store a comment for later layout and alignment.
-  struct StoredComment {
-    FormatToken Tok;
+                             unsigned WhitespaceStartColumn,
+                             unsigned EscapedNewlineColumn);
+
+  /// \brief Structure to store tokens for later layout and alignment.
+  struct StoredToken {
+    StoredToken(SourceLocation ReplacementLoc, unsigned ReplacementLength,
+                unsigned MinColumn, unsigned MaxColumn, unsigned NewLines,
+                unsigned Spaces)
+        : ReplacementLoc(ReplacementLoc), ReplacementLength(ReplacementLength),
+          MinColumn(MinColumn), MaxColumn(MaxColumn), NewLines(NewLines),
+          Spaces(Spaces), Untouchable(false) {}
+    SourceLocation ReplacementLoc;
+    unsigned ReplacementLength;
     unsigned MinColumn;
     unsigned MaxColumn;
     unsigned NewLines;
     unsigned Spaces;
     bool Untouchable;
+    std::string Prefix;
+    std::string Postfix;
   };
-  SmallVector<StoredComment, 16> Comments;
-  typedef SmallVector<StoredComment, 16>::iterator comment_iterator;
+  SmallVector<StoredToken, 16> Comments;
+  SmallVector<StoredToken, 16> EscapedNewlines;
+  typedef SmallVector<StoredToken, 16>::iterator token_iterator;
 
   /// \brief Put all the comments between \p I and \p E into \p Column.
-  void alignComments(comment_iterator I, comment_iterator E, unsigned Column);
+  void alignComments(token_iterator I, token_iterator E, unsigned Column);
 
   /// \brief Stores \p Text as the replacement for the whitespace in front of
   /// \p Tok.
-  void storeReplacement(const FormatToken &Tok, const std::string Text);
+  void storeReplacement(SourceLocation Loc, unsigned Length,
+                        const std::string Text);
 
   SourceManager &SourceMgr;
   tooling::Replacements Replaces;