id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
11913	free functions should support StreamBuffer concept	vinnie.falco@…	chris_kohlhoff	"Functions like ```boost::asio::read``` which take ```boost::asio::basic_streambuf<>``` as parameters should instead take the stream buffer by template argument. A new concept ```StreamBuffer``` should be added under ""Type Requirements"" in the reference.

Rationale: boost free functions should work with user defined stream buffers that meet the requirements. The asio reference alludes to this functionality in the description for ```basic_streambuf```:

""The basic_streambuf class's public interface is intended to permit the following implementation strategies:...""

However without support for types that meet the requirements, user defined stream buffers cannot provide alternate implementation strategies that work with asio free functions.

Example of a user defined streambuf with a compatible interface:
https://github.com/ripple/rippled/blob/develop/src/beast/beast/asio/streambuf.h#L38

"	Feature Requests	new	To Be Determined	asio	Boost 1.61.0	Problem