Enables layouting unwrapped lines around preprocessor directives.

Previously, we'd always start at indent level 0 after a preprocessor
directive, now we layout the following snippet (column limit 69) as
follows:

functionCallTo(someOtherFunction(
    withSomeParameters, whichInSequence,
    areLongerThanALine(andAnotherCall,
  B
                       withMoreParamters,
                       whichStronglyInfluenceTheLayout),
    andMoreParameters),
               trailing);

Note that the different jumping indent is a different issue that will be
addressed separately.

This is the first step towards handling #ifdef->#else->#endif chains
correctly.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@171974 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 9 insertions, 2 deletions

diff --git a/lib/Format/UnwrappedLineParser.h b/lib/Format/UnwrappedLineParser.h
index 010bad8ece..500054fe9a 100644
--- a/lib/Format/UnwrappedLineParser.h
+++ b/lib/Format/UnwrappedLineParser.h
@@ -34,7 +34,7 @@ namespace format {
 struct FormatToken {
   FormatToken()
       : NewlinesBefore(0), HasUnescapedNewline(false), WhiteSpaceLength(0),
-        TokenLength(0), IsFirst(false) {
+        TokenLength(0), IsFirst(false), MustBreakBefore(false) {
   }
 
   /// \brief The \c Token.
@@ -68,6 +68,12 @@ struct FormatToken {
   /// \brief Indicates that this is the first token.
   bool IsFirst;
 
+  /// \brief Whether there must be a line break before this token.
+  ///
+  /// This happens for example when a preprocessor directive ended directly
+  /// before the token.
+  bool MustBreakBefore;
+
   // FIXME: We currently assume that there is exactly one token in this vector
   // except for the very last token that does not have any children.
   /// \brief All tokens that logically follow this token.
@@ -144,10 +150,11 @@ private:
   // FIXME: We are constantly running into bugs where Line.Level is incorrectly
   // subtracted from beyond 0. Introduce a method to subtract from Line.Level
   // and use that everywhere in the Parser.
-  UnwrappedLine Line;
+  llvm::OwningPtr<UnwrappedLine> Line;
   bool RootTokenInitialized;
   FormatToken *LastInCurrentLine;
   FormatToken FormatTok;
+  bool MustBreakBeforeNextToken;
 
   const FormatStyle &Style;
   FormatTokenSource *Tokens;