Hi, all, I have a proposal to make boost::iostreams support char_type other than char or wchar_t. Since the library gives users the opportunity to define char_type in Device, it should be available to boost::iostreams::copy from any source to any sink with the *same* char_type. Eg, If both Devices have UserDefinedStructure as char_type, boost::iostreams::copy should copy UserDefinedStructure objects from source to sink and return the number of objects copied. Currently, it is forbidden by a mistake (or not?) in boost::iostreams::copy. That is "detail::basic_buffer<char_type>" only allocate the raw space without construct them by using UserDefinedStructure constructor. I really appreciate this library, so would boost::iostreams please to concider my proposal? Or there are other ways to achieve this? Thank you in advance. -- leishen