1 files changed, 20 insertions, 0 deletions
diff --git a/graphs/cpp/cartesian_vector/state_saver.hh b/graphs/cpp/cartesian_vector/state_saver.hh
new file mode 100644
index 0000000..f52127c
--- /dev/null
+++ b/graphs/cpp/cartesian_vector/state_saver.hh
@@ -0,0 +1,20 @@
+#pragma once
+
+#include <iostream>
+
+class StateSaver
+{
+public:
+    //! constructor should save all flags and precision
+    StateSaver(std::ostream& os);
+    //! destructor should restore all flags and precision
+    ~StateSaver();
+
+private:
+    //! original stream
+    std::ostream& saved_stream_;
+    //! flags of the original stream
+    std::ios_base::fmtflags saved_flags_;
+    //! precision of the original stream
+    std::streamsize saved_precision_;
+};