1 files changed, 28 insertions, 0 deletions
diff --git a/src/theory/arith/arith_lemma.cpp b/src/theory/arith/arith_lemma.cpp
new file mode 100644
index 000000000..9bd4df255
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+++ b/src/theory/arith/arith_lemma.cpp
@@ -0,0 +1,28 @@
+/*********************                                                        */
+/*! \file arith_lemma.cpp
+ ** \verbatim
+ ** Top contributors (to current version):
+ **   Gereon Kremer
+ ** This file is part of the CVC4 project.
+ ** Copyright (c) 2009-2020 by the authors listed in the file AUTHORS
+ ** in the top-level source directory) and their institutional affiliations.
+ ** All rights reserved.  See the file COPYING in the top-level source
+ ** directory for licensing information.\endverbatim
+ **
+ ** \brief ArithLemma class, derived from Lemma.
+ **/
+
+#include "theory/arith/arith_lemma.h"
+
+namespace CVC4 {
+namespace theory {
+namespace arith {
+
+std::ostream& operator<<(std::ostream& out, const ArithLemma& al)
+{
+  return out << al.d_node;
+}
+
+}  // namespace arith
+}  // namespace theory
+}  // namespace CVC4