[Boost-bugs] [Boost C++ Libraries] #2960: Composing argument pack formed with positional arguments, using the comma operator

Subject: [Boost-bugs] [Boost C++ Libraries] #2960: Composing argument pack formed with positional arguments, using the comma operator
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2009-04-19 16:33:52

#2960: Composing argument pack formed with positional arguments, using the comma
operator
------------------------------+---------------------------------------------
 Reporter:  e_r               |       Owner:  danielw  
     Type:  Bugs              |      Status:  new      
Milestone:  To Be Determined  |   Component:  parameter
  Version:  Boost 1.37.0      |    Severity:  Problem  
 Keywords:                    |  
------------------------------+---------------------------------------------
 Due to a  bug (or perhaps my misusage), I am unable to compose two
 argument packs, each formed using positional arguments, using the comma
 operator.

 news://news.gmane.org:119/grtmb9$tpq$[e-mail]

 Compiler : i686-apple-darwin9-gcc-4.0.1

 BOOST_PARAMETER_KEYWORD(tag, x)
 BOOST_PARAMETER_KEYWORD(tag, y)
 template<class ArgumentPack>
 void f(ArgumentPack const & args){
      double x_val = args[x];
      double y_val = args[y];
 }

     typedef boost::parameter::parameters<
         parameter::required<tag::x>
     > par_x_t;
     typedef boost::parameter::parameters<
         parameter::required<tag::y>
     > par_y_t;

      double x_val = 9.0;
      double y_val = 0.1;
      spec_x_t spec_x;
      spec_y_t spec_y;
      f(
          ( spec_x(x_val),spec_y(y_val))
      ); //no match operator[<unnamed>::x]

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/2960>
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