diff --git a/exprtk/Makefile b/exprtk/Makefile
index 7bd2367..76d43a0 100644
--- a/exprtk/Makefile
+++ b/exprtk/Makefile
@@ -2,7 +2,7 @@
 # **************************************************************
 # *         C++ Mathematical Expression Toolkit Library        *
 # *                                                            *
-# * Author: Arash Partow (1999-2019)                           *
+# * Author: Arash Partow (1999-2020)                           *
 # * URL: http://www.partow.net/programming/exprtk/index.html   *
 # *                                                            *
 # * Copyright notice:                                          *
diff --git a/exprtk/exprtk.hpp b/exprtk/exprtk.hpp
index 1097079..75ee0de 100644
--- a/exprtk/exprtk.hpp
+++ b/exprtk/exprtk.hpp
@@ -2,7 +2,7 @@
  ******************************************************************
  *           C++ Mathematical Expression Toolkit Library          *
  *                                                                *
- * Author: Arash Partow (1999-2019)                               *
+ * Author: Arash Partow (1999-2020)                               *
  * URL: http://www.partow.net/programming/exprtk/index.html       *
  *                                                                *
  * Copyright notice:                                              *
@@ -14390,7 +14390,7 @@ namespace exprtk
 
          inline T3 t3() const
          {
-            return t2_;
+            return t3_;
          }
 
          std::string type_id() const
@@ -38927,9 +38927,9 @@ namespace exprtk
    namespace information
    {
       static const char* library = "Mathematical Expression Toolkit";
-      static const char* version = "2.71828182845904523536028747135266249775724709369995957"
-                                   "4966967627724076630353547594571382178525166427427466391";
-      static const char* date    = "20190818";
+      static const char* version = "2.7182818284590452353602874713526624977572470936999595749"
+                                   "669676277240766303535475945713821785251664274274663919320";
+      static const char* date    = "20200101";
 
       static inline std::string data()
       {
diff --git a/exprtk/exprtk_benchmark.cpp b/exprtk/exprtk_benchmark.cpp
index 318a042..8e9c5fa 100644
--- a/exprtk/exprtk_benchmark.cpp
+++ b/exprtk/exprtk_benchmark.cpp
@@ -3,7 +3,7 @@
  *         C++ Mathematical Expression Toolkit Library        *
  *                                                            *
  * ExprTk vs Native Benchmarks                                *
- * Author: Arash Partow (1999-2019)                           *
+ * Author: Arash Partow (1999-2020)                           *
  * URL: http://www.partow.net/programming/exprtk/index.html   *
  *                                                            *
  * Copyright notice:                                          *
diff --git a/exprtk/exprtk_simple_example_01.cpp b/exprtk/exprtk_simple_example_01.cpp
index c835e3f..80eafe1 100644
--- a/exprtk/exprtk_simple_example_01.cpp
+++ b/exprtk/exprtk_simple_example_01.cpp
@@ -3,7 +3,7 @@
  *         C++ Mathematical Expression Toolkit Library        *
  *                                                            *
  * Simple Example 1                                           *
- * Author: Arash Partow (1999-2019)                           *
+ * Author: Arash Partow (1999-2020)                           *
  * URL: http://www.partow.net/programming/exprtk/index.html   *
  *                                                            *
  * Copyright notice:                                          *
diff --git a/exprtk/exprtk_simple_example_02.cpp b/exprtk/exprtk_simple_example_02.cpp
index 4cb4623..56b9c9b 100644
--- a/exprtk/exprtk_simple_example_02.cpp
+++ b/exprtk/exprtk_simple_example_02.cpp
@@ -3,7 +3,7 @@
  *         C++ Mathematical Expression Toolkit Library        *
  *                                                            *
  * Simple Example 2                                           *
- * Author: Arash Partow (1999-2019)                           *
+ * Author: Arash Partow (1999-2020)                           *
  * URL: http://www.partow.net/programming/exprtk/index.html   *
  *                                                            *
  * Copyright notice:                                          *
diff --git a/exprtk/exprtk_simple_example_03.cpp b/exprtk/exprtk_simple_example_03.cpp
index d8f9346..8e5a164 100644
--- a/exprtk/exprtk_simple_example_03.cpp
+++ b/exprtk/exprtk_simple_example_03.cpp
@@ -3,7 +3,7 @@
  *         C++ Mathematical Expression Toolkit Library        *
  *                                                            *
  * Simple Example 3                                           *
- * Author: Arash Partow (1999-2019)                           *
+ * Author: Arash Partow (1999-2020)                           *
  * URL: http://www.partow.net/programming/exprtk/index.html   *
  *                                                            *
  * Copyright notice:                                          *
diff --git a/exprtk/exprtk_simple_example_04.cpp b/exprtk/exprtk_simple_example_04.cpp
index 2246211..aca7014 100644
--- a/exprtk/exprtk_simple_example_04.cpp
+++ b/exprtk/exprtk_simple_example_04.cpp
@@ -3,7 +3,7 @@
  *         C++ Mathematical Expression Toolkit Library        *
  *                                                            *
  * Simple Example 4                                           *
- * Author: Arash Partow (1999-2019)                           *
+ * Author: Arash Partow (1999-2020)                           *
  * URL: http://www.partow.net/programming/exprtk/index.html   *
  *                                                            *
  * Copyright notice:                                          *
diff --git a/exprtk/exprtk_simple_example_05.cpp b/exprtk/exprtk_simple_example_05.cpp
index a795340..50d7987 100644
--- a/exprtk/exprtk_simple_example_05.cpp
+++ b/exprtk/exprtk_simple_example_05.cpp
@@ -3,7 +3,7 @@
  *         C++ Mathematical Expression Toolkit Library        *
  *                                                            *
  * Simple Example 5                                           *
- * Author: Arash Partow (1999-2019)                           *
+ * Author: Arash Partow (1999-2020)                           *
  * URL: http://www.partow.net/programming/exprtk/index.html   *
  *                                                            *
  * Copyright notice:                                          *
diff --git a/exprtk/exprtk_simple_example_06.cpp b/exprtk/exprtk_simple_example_06.cpp
index 90f302f..0af6f8b 100644
--- a/exprtk/exprtk_simple_example_06.cpp
+++ b/exprtk/exprtk_simple_example_06.cpp
@@ -3,7 +3,7 @@
  *         C++ Mathematical Expression Toolkit Library        *
  *                                                            *
  * Simple Example 6                                           *
- * Author: Arash Partow (1999-2019)                           *
+ * Author: Arash Partow (1999-2020)                           *
  * URL: http://www.partow.net/programming/exprtk/index.html   *
  *                                                            *
  * Copyright notice:                                          *
diff --git a/exprtk/exprtk_simple_example_07.cpp b/exprtk/exprtk_simple_example_07.cpp
index 7679332..bdf3c3b 100644
--- a/exprtk/exprtk_simple_example_07.cpp
+++ b/exprtk/exprtk_simple_example_07.cpp
@@ -3,7 +3,7 @@
  *         C++ Mathematical Expression Toolkit Library        *
  *                                                            *
  * Simple Example 7                                           *
- * Author: Arash Partow (1999-2019)                           *
+ * Author: Arash Partow (1999-2020)                           *
  * URL: http://www.partow.net/programming/exprtk/index.html   *
  *                                                            *
  * Copyright notice:                                          *
diff --git a/exprtk/exprtk_simple_example_08.cpp b/exprtk/exprtk_simple_example_08.cpp
index b268d4e..4565098 100644
--- a/exprtk/exprtk_simple_example_08.cpp
+++ b/exprtk/exprtk_simple_example_08.cpp
@@ -3,7 +3,7 @@
  *         C++ Mathematical Expression Toolkit Library        *
  *                                                            *
  * Simple Example 8                                           *
- * Author: Arash Partow (1999-2019)                           *
+ * Author: Arash Partow (1999-2020)                           *
  * URL: http://www.partow.net/programming/exprtk/index.html   *
  *                                                            *
  * Copyright notice:                                          *
diff --git a/exprtk/exprtk_simple_example_09.cpp b/exprtk/exprtk_simple_example_09.cpp
index a19c256..b11f193 100644
--- a/exprtk/exprtk_simple_example_09.cpp
+++ b/exprtk/exprtk_simple_example_09.cpp
@@ -3,7 +3,7 @@
  *         C++ Mathematical Expression Toolkit Library        *
  *                                                            *
  * Simple Example 9                                           *
- * Author: Arash Partow (1999-2019)                           *
+ * Author: Arash Partow (1999-2020)                           *
  * URL: http://www.partow.net/programming/exprtk/index.html   *
  *                                                            *
  * Copyright notice:                                          *
diff --git a/exprtk/exprtk_simple_example_10.cpp b/exprtk/exprtk_simple_example_10.cpp
index 610169e..13728da 100644
--- a/exprtk/exprtk_simple_example_10.cpp
+++ b/exprtk/exprtk_simple_example_10.cpp
@@ -3,7 +3,7 @@
  *         C++ Mathematical Expression Toolkit Library        *
  *                                                            *
  * Simple Example 10                                          *
- * Author: Arash Partow (1999-2019)                           *
+ * Author: Arash Partow (1999-2020)                           *
  * URL: http://www.partow.net/programming/exprtk/index.html   *
  *                                                            *
  * Copyright notice:                                          *
diff --git a/exprtk/exprtk_simple_example_11.cpp b/exprtk/exprtk_simple_example_11.cpp
index 2adf6db..454c8f0 100644
--- a/exprtk/exprtk_simple_example_11.cpp
+++ b/exprtk/exprtk_simple_example_11.cpp
@@ -3,7 +3,7 @@
  *         C++ Mathematical Expression Toolkit Library        *
  *                                                            *
  * Simple Example 11                                          *
- * Author: Arash Partow (1999-2019)                           *
+ * Author: Arash Partow (1999-2020)                           *
  * URL: http://www.partow.net/programming/exprtk/index.html   *
  *                                                            *
  * Copyright notice:                                          *
diff --git a/exprtk/exprtk_simple_example_12.cpp b/exprtk/exprtk_simple_example_12.cpp
index ca3c533..ce398bd 100644
--- a/exprtk/exprtk_simple_example_12.cpp
+++ b/exprtk/exprtk_simple_example_12.cpp
@@ -3,7 +3,7 @@
  *         C++ Mathematical Expression Toolkit Library        *
  *                                                            *
  * Simple Example 12                                          *
- * Author: Arash Partow (1999-2019)                           *
+ * Author: Arash Partow (1999-2020)                           *
  * URL: http://www.partow.net/programming/exprtk/index.html   *
  *                                                            *
  * Copyright notice:                                          *
diff --git a/exprtk/exprtk_simple_example_13.cpp b/exprtk/exprtk_simple_example_13.cpp
index 84698a3..839e749 100644
--- a/exprtk/exprtk_simple_example_13.cpp
+++ b/exprtk/exprtk_simple_example_13.cpp
@@ -3,7 +3,7 @@
  *         C++ Mathematical Expression Toolkit Library        *
  *                                                            *
  * Simple Example 13                                          *
- * Author: Arash Partow (1999-2019)                           *
+ * Author: Arash Partow (1999-2020)                           *
  * URL: http://www.partow.net/programming/exprtk/index.html   *
  *                                                            *
  * Copyright notice:                                          *
diff --git a/exprtk/exprtk_simple_example_14.cpp b/exprtk/exprtk_simple_example_14.cpp
index 9e73448..bc508a2 100644
--- a/exprtk/exprtk_simple_example_14.cpp
+++ b/exprtk/exprtk_simple_example_14.cpp
@@ -3,7 +3,7 @@
  *         C++ Mathematical Expression Toolkit Library        *
  *                                                            *
  * Simple Example 14                                          *
- * Author: Arash Partow (1999-2019)                           *
+ * Author: Arash Partow (1999-2020)                           *
  * URL: http://www.partow.net/programming/exprtk/index.html   *
  *                                                            *
  * Copyright notice:                                          *
diff --git a/exprtk/exprtk_simple_example_15.cpp b/exprtk/exprtk_simple_example_15.cpp
index 0f91c41..f7364fd 100644
--- a/exprtk/exprtk_simple_example_15.cpp
+++ b/exprtk/exprtk_simple_example_15.cpp
@@ -3,7 +3,7 @@
  *         C++ Mathematical Expression Toolkit Library        *
  *                                                            *
  * Simple Example 15                                          *
- * Author: Arash Partow (1999-2019)                           *
+ * Author: Arash Partow (1999-2020)                           *
  * URL: http://www.partow.net/programming/exprtk/index.html   *
  *                                                            *
  * Copyright notice:                                          *
diff --git a/exprtk/exprtk_simple_example_16.cpp b/exprtk/exprtk_simple_example_16.cpp
index 0228277..cd76f84 100644
--- a/exprtk/exprtk_simple_example_16.cpp
+++ b/exprtk/exprtk_simple_example_16.cpp
@@ -3,7 +3,7 @@
  *         C++ Mathematical Expression Toolkit Library        *
  *                                                            *
  * Simple Example 16                                          *
- * Author: Arash Partow (1999-2019)                           *
+ * Author: Arash Partow (1999-2020)                           *
  * URL: http://www.partow.net/programming/exprtk/index.html   *
  *                                                            *
  * Copyright notice:                                          *
diff --git a/exprtk/exprtk_simple_example_17.cpp b/exprtk/exprtk_simple_example_17.cpp
index a9effc6..50263aa 100644
--- a/exprtk/exprtk_simple_example_17.cpp
+++ b/exprtk/exprtk_simple_example_17.cpp
@@ -3,7 +3,7 @@
  *         C++ Mathematical Expression Toolkit Library        *
  *                                                            *
  * Simple Example 17                                          *
- * Author: Arash Partow (1999-2019)                           *
+ * Author: Arash Partow (1999-2020)                           *
  * URL: http://www.partow.net/programming/exprtk/index.html   *
  *                                                            *
  * Copyright notice:                                          *
diff --git a/exprtk/exprtk_simple_example_18.cpp b/exprtk/exprtk_simple_example_18.cpp
index 73f47bc..4fabc72 100644
--- a/exprtk/exprtk_simple_example_18.cpp
+++ b/exprtk/exprtk_simple_example_18.cpp
@@ -3,7 +3,7 @@
  *         C++ Mathematical Expression Toolkit Library        *
  *                                                            *
  * Simple Example 18                                          *
- * Author: Arash Partow (1999-2019)                           *
+ * Author: Arash Partow (1999-2020)                           *
  * URL: http://www.partow.net/programming/exprtk/index.html   *
  *                                                            *
  * Copyright notice:                                          *
diff --git a/exprtk/exprtk_simple_example_19.cpp b/exprtk/exprtk_simple_example_19.cpp
index 1bc0c67..7720155 100644
--- a/exprtk/exprtk_simple_example_19.cpp
+++ b/exprtk/exprtk_simple_example_19.cpp
@@ -3,7 +3,7 @@
  *         C++ Mathematical Expression Toolkit Library        *
  *                                                            *
  * Simple Example 19                                          *
- * Author: Arash Partow (1999-2019)                           *
+ * Author: Arash Partow (1999-2020)                           *
  * URL: http://www.partow.net/programming/exprtk/index.html   *
  *                                                            *
  * Copyright notice:                                          *
diff --git a/exprtk/exprtk_test.cpp b/exprtk/exprtk_test.cpp
index b89eb51..91e7593 100644
--- a/exprtk/exprtk_test.cpp
+++ b/exprtk/exprtk_test.cpp
@@ -3,7 +3,7 @@
  *         C++ Mathematical Expression Toolkit Library        *
  *                                                            *
  * Examples and Unit-Tests                                    *
- * Author: Arash Partow (1999-2019)                           *
+ * Author: Arash Partow (1999-2020)                           *
  * URL: http://www.partow.net/programming/exprtk/index.html   *
  *                                                            *
  * Copyright notice:                                          *