[boost] stream-cons & stream-cdr using boost.proto & boost.fusion

Subject: [boost] stream-cons & stream-cdr using boost.proto & boost.fusion
From: Niitsuma Hirotaka (hirotaka.niitsuma_at_[hidden])
Date: 2011-03-22 23:31:52

I try to make
stream-cons & stream-cdr using boost.proto & boost.fusion.

code is here
http://d.hatena.ne.jp/niitsuma/20110323/1300850731

But this is not work in the following case

        auto s= stream_cons(2,stream_cons(1,0));
        auto ss= stream_cons(3, s);
        
        std::cout << proto_force(
                                 proto_force(ss.cdr.car).cdr.car).car << std::endl; //not work

        std::cout <<  stream_cdr(stream_cdr(ss)).car << std::endl; //not work

Where is problem?