Add an operator< for SmallVector.

llvm-svn: 51791

1 files changed, 5 insertions, 0 deletions

diff --git a/llvm/include/llvm/ADT/SmallVector.h b/llvm/include/llvm/ADT/SmallVector.h
index 843d561b6bc..715f28c2796 100644
--- a/llvm/include/llvm/ADT/SmallVector.h
+++ b/llvm/include/llvm/ADT/SmallVector.h
@@ -307,6 +307,11 @@ public:
     return true;
   }
   bool operator!=(const SmallVectorImpl &RHS) const { return !(*this == RHS); }
+
+  bool operator<(const SmallVectorImpl &RHS) const {
+    return std::lexicographical_compare(begin(), end(),
+                                        RHS.begin(), RHS.end());
+  }
   
 private:
   /// isSmall - Return true if this is a smallvector which has not had dynamic