1 files changed, 13 insertions, 0 deletions
diff --git a/include/clang/Basic/SourceManager.h b/include/clang/Basic/SourceManager.h
index 0299d2237f..af5f76969a 100644
--- a/include/clang/Basic/SourceManager.h
+++ b/include/clang/Basic/SourceManager.h
@@ -1116,6 +1116,19 @@ public:
   /// \returns true if LHS source location comes before RHS, false otherwise.
   bool isBeforeInTranslationUnit(SourceLocation LHS, SourceLocation RHS) const;
 
+  /// \brief Comparison function class.
+  class LocBeforeThanCompare : public std::binary_function<SourceLocation,
+                                                         SourceLocation, bool> {
+    SourceManager &SM;
+
+  public:
+    explicit LocBeforeThanCompare(SourceManager &SM) : SM(SM) { }
+
+    bool operator()(SourceLocation LHS, SourceLocation RHS) const {
+      return SM.isBeforeInTranslationUnit(LHS, RHS);
+    }
+  };
+
   /// \brief Determines the order of 2 source locations in the "source location
   /// address space".
   bool isBeforeInSLocAddrSpace(SourceLocation LHS, SourceLocation RHS) const {