[Boost-bugs] [Boost C++ Libraries] #6618: boost::container::flat_map not transparently accepting move-only values

Subject: [Boost-bugs] [Boost C++ Libraries] #6618: boost::container::flat_map not transparently accepting move-only values
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2012-02-25 23:28:54


#6618: boost::container::flat_map not transparently accepting move-only values
---------------------------------------------------------+------------------
 Reporter: Charles David Tallman <DaveTallman@…> | Owner: igaztanaga
     Type: Bugs | Status: new
Milestone: To Be Determined | Component: container
  Version: Boost 1.48.0 | Severity: Problem
 Keywords: flat_map, moveable not copyable |
---------------------------------------------------------+------------------
 I would have expected to be able to store move-only values in a
 boost::container::flat_map, and to have no code changes except in the
 header files, since it is supposed to be a drop-in replacement for
 std::map. However, I cannot create a key-value pair of a type it will
 accept, because of const errors. The attached program shows the problem.

 Perhaps allowing a non-const std::pair reference to be passed to insert
 would help, or even a new make_pair helper function that returned a
 BOOST_RV_REF(value_type)?

 The same thing happens with boost::container::map.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/6618>
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