Parser support for #pragma clang __debug captured

This patch implements parsing ‘#pragma clang __debug’ as a first step for
implementing captured statements. Captured statements are a mechanism for
doing outlining in the AST.
see http://lists.cs.uiuc.edu/pipermail/cfe-dev/2013-January/027540.html.

Currently returns StmtEmpty

Author: Andy Zhang <andy.zhang@intel.com>

Differential Revision: http://llvm-reviews.chandlerc.com/D369

llvm-svn: 179614

1 files changed, 12 insertions, 0 deletions

diff --git a/clang/lib/Frontend/PrintPreprocessedOutput.cpp b/clang/lib/Frontend/PrintPreprocessedOutput.cpp
index 432428bb969..6734d7759b4 100644
--- a/clang/lib/Frontend/PrintPreprocessedOutput.cpp
+++ b/clang/lib/Frontend/PrintPreprocessedOutput.cpp
@@ -140,6 +140,7 @@ public:
   virtual void PragmaComment(SourceLocation Loc, const IdentifierInfo *Kind,
                              const std::string &Str);
   virtual void PragmaMessage(SourceLocation Loc, StringRef Str);
+  virtual void PragmaDebug(SourceLocation Loc, StringRef DebugType);
   virtual void PragmaDiagnosticPush(SourceLocation Loc,
                                     StringRef Namespace);
   virtual void PragmaDiagnosticPop(SourceLocation Loc,
@@ -419,6 +420,17 @@ void PrintPPOutputPPCallbacks::PragmaMessage(SourceLocation Loc,
   setEmittedDirectiveOnThisLine();
 }
 
+void PrintPPOutputPPCallbacks::PragmaDebug(SourceLocation Loc,
+                                           StringRef DebugType) {
+  startNewLineIfNeeded();
+  MoveToLine(Loc);
+
+  OS << "#pragma clang __debug ";
+  OS << DebugType;
+
+  setEmittedDirectiveOnThisLine();
+}
+
 void PrintPPOutputPPCallbacks::
 PragmaDiagnosticPush(SourceLocation Loc, StringRef Namespace) {
   startNewLineIfNeeded();