Introduce a callback to PPCallbacks for lines skipped by the preprocessor.

Patch by Jason Haslam!

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@140612 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 11 insertions, 0 deletions

diff --git a/include/clang/Lex/PPCallbacks.h b/include/clang/Lex/PPCallbacks.h
index 767bffa8fb..9273d19b9c 100644
--- a/include/clang/Lex/PPCallbacks.h
+++ b/include/clang/Lex/PPCallbacks.h
@@ -158,6 +158,12 @@ public:
   /// MI is released immediately following this callback.
   virtual void MacroUndefined(const Token &MacroNameTok, const MacroInfo *MI) {
   }
+  
+  /// SourceRangeSkipped - This hook is called when a source range is skipped.
+  /// \param Range The SourceRange that was skipped. The range begins at the
+  /// #if/#else directive and ends after the #endif/#else directive.
+  virtual void SourceRangeSkipped(SourceRange Range) {
+  }
 
   /// If -- This hook is called whenever an #if is seen.
   /// \param Range The SourceRange of the expression being tested.
@@ -286,6 +292,11 @@ public:
     Second->MacroUndefined(MacroNameTok, MI);
   }
 
+  virtual void SourceRangeSkipped(SourceRange Range) {
+    First->SourceRangeSkipped(Range);
+    Second->SourceRangeSkipped(Range);
+  }
+
   /// If -- This hook is called whenever an #if is seen.
   virtual void If(SourceRange Range) {
     First->If(Range);