Add size() function to get size of arrays.

Source: https://en.cppreference.com/w/cpp/iterator/size

Author: dhebbeker

robot-control-src/library_extension.hpp

@@ -0,0 +1,12 @@
+#ifndef ROBOT_CONTROL_SRC_LIBRARY_EXTENSION_HPP_
+#define ROBOT_CONTROL_SRC_LIBRARY_EXTENSION_HPP_
+
+#include <cstddef>
+
+template <class T, std::size_t N>
+constexpr std::size_t size(const T (&)[N]) noexcept
+{
+    return N;
+}
+
+#endif /* ROBOT_CONTROL_SRC_LIBRARY_EXTENSION_HPP_ */