should ssl/engine get_output return const buffer ?

[itsme@…]

compiling the attached testasiossl.cpp program, you get an error message complaining that it is not possible to convert 'mutable_buffers_1' to 'const_buffers_1' in a call to async_write_some, called from write_op. ( see the attached files for the full compiler output )

The reason write_op tries to pass a mutable buffer instead of a const buffer, is that it obtains the buffer by calling 'get_output'. which returns a mutable buffer. ( in boost/asio/ssl/detail/impl/engine.ipp )

shouldn't get_output return a const buffer sequence?

note that in the test program i explicitly defined the types for the buffers, instead of making them a templated argument.

[itsme@…]

program showing problem with ssl/engine get_output

[itsme@…]

compiler output from clang++

[itsme@…]

compiler output from g++

[itsme@…]

proposed change to asio/ssl/engine

[chris_kohlhoff]

By explicitly specifying the buffer types your teststream class does not adhere to the stream type requirements. It should accept an arbitrary ConstBufferSequence (for async_write_some) or MutableBufferSequence (for async_read_some).