When a suspended composed operation is resumed, the operation
now posts to the io_service to get in the correct context. Previously,
invokables resumed in the context of a different completion handler.
* asio_handler_invoke for any resumed invokable will return `true`.
The call to the final handler in a composed operation MUST be
the last thing performed, as the handler may cause the end of
object lifetimes before it returns.
websocket:
* Move echo server to test/
* Fix warnings
* Fix maskgen being uncopyable
* Simplify utf8_checker special member declarations
* Fix stream move assignable when owning the next layer
* Add javadocs for stream special members
* Add stream unit tests
* Move throwing member definitions to the .ipp file
* Use get_lowest_layer in stream declaration
* Perform type checks at each call site instead of constructor
* Demote close_code to a non-class enum:
Otherwise, application specific close codes
cannot be assigned without using static_cast.
core:
* Add streambuf_readstream special members tests
* Add move assignment operator to streambuf_readstream
* Add detail/get_lowest_layer trait
* Add static_string tests
* Move static_string from websocket to core
