Re: [Boost-users] [iostreams] making a symmetric_filter flushable

Kessner, Darren E. wrote:

My questions:

1) How does one make a symmetric_filter Flushable?

My understanding is that you need to add the "flushable_tag" category tag to your filter. In addition, the filter must add support for the flush function. Look at "flushable' and "flush" in the docs. In addition, if you search the iostreams source tree for "flushable_tag" you should find some example code.

2) Is this the best way to do this sort of on-the-fly hash calculation?

I don't know what is the "best" way to do it.