[boost] Boost::iostreams dual-use seekable filter

Subject: [boost] Boost::iostreams dual-use seekable filter
From: Jonathan Biggar (jon_at_[hidden])
Date: 2017-10-26 02:54:10

I see dual-use filters and seekable filters, but I can't find an example of
a dual-use seekable filter.

Any help digging me out of template error heck would be appreciated.