Re: [Boost-bugs] [Boost C++ Libraries] #2793: function types don't work for named template type parameters

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #2793: function types don't work for named template type parameters
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2013-01-30 02:19:47

#2793: function types don't work for named template type parameters
---------------------------+------------------------------------------------
  Reporter:  fmhess        |       Owner:  danielw  
      Type:  Bugs          |      Status:  new      
 Milestone:  Boost 1.39.0  |   Component:  parameter
   Version:  Boost 1.38.0  |    Severity:  Problem  
Resolution:                |    Keywords:           
---------------------------+------------------------------------------------

Comment (by Louis Dionne <louis.dionne92@…>):

 I have run into this problem too.

 Instead of changing the definition of `reference`, I opted for a more
 conservative solution. Since I was getting compiler errors in the
 declarations of some member functions of `arg_list`, I changed these
 declarations so that the problematic types are dependent on a template
 parameter. Since the functions are never actually used for named template
 parameters, the signatures are not instantiated and the compiler does not
 complain.

 Attached is a patch that makes the `function_type_named_parameter.cpp`
 test pass. My own code also works with this patch. While this is a hacky
 workaround, I believe it is still better than nothing until a definite
 solution can be settled on.

 I compiled with Clang 3.2 and G++ 4.7.2.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/2793#comment:3>
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