[Boost-users] [fusion] probably a bug in result_of::join

Subject: [Boost-users] [fusion] probably a bug in result_of::join
From: jl (jl_at_[hidden])
Date: 2009-10-14 09:15:11

This is nearly a copy-paste from the doc (and agrees with intuition): 

#include <boost/fusion/algorithm/transformation/join.hpp>
#include <boost/fusion/include/vector.hpp>
#include <boost/fusion/include/join.hpp> 

void foo() {
  using namespace boost::fusion;
  vector<> v1, v2;
  result_of::join< vector<>, vector<> >::type j = join(v1, v2);
} 

...but it doesn't compile (msvc9, boost 1.40): 

c:\UserTemp\x54209\BoostTests\Any\main.cpp(20) : error C2440: 'initializing' 
: cannot convert from 
'boost::fusion::result_of::join<LhSequence,RhSequence>::type' to 
'boost::fusion::joint_view<Sequence1,Sequence2>' 

        with
        [
            LhSequence=const boost::fusion::vector<>,
            RhSequence=const boost::fusion::vector<>
        ]
        and
        [
            Sequence1=boost::fusion::vector<>,
            Sequence2=boost::fusion::vector<>
        ]
        No constructor could take the source type, or constructor overload 
resolution was ambiguous 

J-L