Method FileExceptionBase

src/Exceptions.h:66–72

        std::string file_path;
        std::string full_message;
        FileExceptionBase(std::string message, std::string file_path="")
            : ExceptionBase(message),
              file_path(file_path),
              full_message(message +
                (file_path != ""
                 ? " for file " + file_path
                 : "")) { }
        virtual const char* what() const noexcept override {
            // Include file path in native C++ exception output (stderr / terminate).
            return full_message.c_str();