-Add API for copying a branch of execution node.

-Allow to use if node several times.

1 files changed, 1 insertions, 0 deletions

diff --git a/range.h b/range.h
index 0ffd298..d8c8ede 100644
--- a/range.h
+++ b/range.h
@@ -47,6 +47,7 @@ public:
     void setEmptyRange(bool);
     bool isEmptyRange();
 
+    virtual Validator* getCopy() const;
 private:
     qint64 m_start;
     qint64 m_end;