1 files changed, 5 insertions, 2 deletions
diff --git a/src/theory/arith/row_vector.h b/src/theory/arith/row_vector.h
index efb64d1c7..a967f8d68 100644
--- a/src/theory/arith/row_vector.h
+++ b/src/theory/arith/row_vector.h
@@ -73,13 +73,16 @@ protected:
 
 public:
 
-  //RowVector() : d_entries() {}
-
   RowVector(const std::vector< ArithVar >& variables,
             const std::vector< Rational >& coefficients,
             std::vector<uint32_t>& counts);
 
 
+  /** Returns the number of nonzero variables in the vector. */
+  uint32_t size() const {
+    return d_entries.size();
+  }
+
   //Iterates over the nonzero entries in the Vector
   NonZeroIterator beginNonZero() const { return d_entries.begin(); }
   NonZeroIterator endNonZero() const { return d_entries.end(); }