A subclass of __basic_parser__ can be invoked directly, without using the provided stream operations. This could be useful for implementing algorithms on objects whose interface does not conform to __Stream__. For example, a [@http://zeromq.org/ *ZeroMQ* socket]. The basic parser interface is interactive; the caller invokes the function [link beast.ref.boost__beast__http__basic_parser.put `basic_parser::put`] repeatedly with buffers until an error occurs or the parsing is done. The function [link beast.ref.boost__beast__http__basic_parser.put_eof `basic_parser::put_eof`] Is used when the caller knows that there will never be more data (for example, if the underlying connection is closed),