[Boost-bugs] [Boost C++ Libraries] #7754: Allow result_of to fall back on decltype

Subject: [Boost-bugs] [Boost C++ Libraries] #7754: Allow result_of to fall back on decltype
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2012-12-01 09:52:06

#7754: Allow result_of to fall back on decltype
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 Reporter:  nathan.crookston+boost@…          |       Owner:  djwalker 
     Type:  Feature Requests                  |      Status:  new      
Milestone:  To Be Determined                  |   Component:  result_of
  Version:  Boost Development Trunk           |    Severity:  Problem  
 Keywords:                                    |  
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 result_of uses decltype by default on very few compilers, since most
 current compilers' decltype support doesn't work for some TR1-style usage.

 Many of those same compilers support C++11 lambdas which don't follow TR1
 result_of protocol.  Currently, this makes lambdas very difficult to use
 with other code using result_of.

 The attached code allows compilers which partially support decltype to use
 it only on functors which don't publish a result_type or result struct.

 It also contains tests & doc changes.  Compiled with VC10, clang++3.1 &
 g++4.5 (both compilers with and without -std=c++0x).

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Ticket URL: <https://svn.boost.org/trac/boost/ticket/7754>
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