[Boost-bugs] [Boost C++ Libraries] #9021: Cannot export boost::iostreams::source implementation on MSVC

Subject: [Boost-bugs] [Boost C++ Libraries] #9021: Cannot export boost::iostreams::source implementation on MSVC
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2013-08-20 20:03:29

#9021: Cannot export boost::iostreams::source implementation on MSVC
------------------------------+-----------------------
 Reporter:  mathstuf@…        |      Owner:  turkanis
     Type:  Bugs              |     Status:  new
Milestone:  To Be Determined  |  Component:  iostreams
  Version:  Boost 1.54.0      |   Severity:  Problem
 Keywords:                    |
------------------------------+-----------------------
 The following fails on MSVC 10 (VS2010) and MSVC 11 (VS2012) at least:

     #include <boost/iostreams/concepts.hpp>
     class __declspec(dllexport) mystream : public boost::iostreams::source
 {};

 with the error:

     error C2338: (is_convertible<Mode, two_sequence>::value)

 in concepts.hpp line 47. The same think happens with a sink. Are custom
 sources and sinks not meant to be exported from a library?

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Ticket URL: <https://svn.boost.org/trac/boost/ticket/9021>
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