Method span_input_adapter

Source/Utils/json.hpp:5156–5157

                sizeof(typename std::remove_pointer<CharT>::type) == 1,
                int >::type = 0 >
                span_input_adapter(CharT b, std::size_t l)
                : ia(reinterpret_cast<const char*>(b), reinterpret_cast<const char*>(b) + l) {}

            template<class IteratorType,
                typename std::enable_if<