[Boost-bugs] [Boost C++ Libraries] #6914: [Lambda] Add result_of and tr1_result_of specializations for nullary function calls

Subject: [Boost-bugs] [Boost C++ Libraries] #6914: [Lambda] Add result_of and tr1_result_of specializations for nullary function calls
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2012-05-17 15:08:00

#6914: [Lambda] Add result_of and tr1_result_of specializations for nullary
function calls
-------------------------------------+--------------------------------------
 Reporter:  michel                   |       Owner:  no-maintainer
     Type:  Feature Requests         |      Status:  new          
Milestone:  To Be Determined         |   Component:  lambda       
  Version:  Boost Development Trunk  |    Severity:  Problem      
 Keywords:                           |  
-------------------------------------+--------------------------------------
 To support nullary-callable polymorphic function objects in
 C++03 `result_of`, we have to specialize `result_of` and `tr1_result_of`
 for the zero-argument case. (If we don't provide specializations,
 the type determined by C++03 `result_of` for zero-argument
 function calls is defaulted to void. See the rationale in N1454.)

 For example, `phoenix/core/actor.hpp` has such specializations.
 (Note that its current implementation is not perfect: #6911.)

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/6914>
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