Method exception_message

Source/Utils/json.hpp:10570–10597

            }

            std::string exception_message(const token_type expected, const std::string& context)
            {
                std::string error_msg = "syntax error ";

                if (!context.empty())
                {
                    error_msg += "while parsing " + context + " ";
                }

                error_msg += "- ";

                if (last_token == token_type::parse_error)
                {
                    error_msg += std::string(m_lexer.get_error_message()) + "; last read: '" +
                        m_lexer.get_token_string() + "'";
                }
                else
                {
                    error_msg += "unexpected " + std::string(lexer_t::token_type_name(last_token));
                }

                if (expected != token_type::uninitialized)
                {
                    error_msg += "; expected " + std::string(lexer_t::token_type_name(expected));
                }

                return error_msg;
            }

        private:
            /// callback function