RTTI Runtime Type Information:typeid - Used for checking types at runtime (RTTI) Strings and text parsingTypes: std::string std::istream => Base class of all input streams. std::stringstream => Stream class used for parsing strings. regex and (ref2) => Available since C++11. => ...
"Data" is apparently a const int, and you're trying to return a non-const reference to it. That's not allowed (as the compiler so kindly tells you). Make "Data" non-const, stick with a const T& return type, or don't return a reference. Those are basically your choices. ...
Matthias Möller removed the dependency from std::stringstream. agrianius added code to use alternative string implementations. Daniel599 allowed to use more algorithms with the items() function. Julius Rakow fixed the Meson include directory and fixed the links to cppreference.com. Sonu Lohani fix...