[Boost-users] [lambda][1.33.1] Lambda warnings after installing VS2005 SP1

From: john.wismar_at_[hidden]
Date: 2006-12-18 18:00:41

I have just installed Service Pack 1 for VS2005, and am now getting a 
warning in some code using lambda::bind.  There wasn't a warning 
previously, but I don't know if the issue is due to an update to the C++ 
standard library, a legitimate warning that they weren't flagging before, 
or a spurious warning. It looks like the issue is that I'm passing a 
function pointer, to bind.  Is this a warning I should just ignore, or is 
this a legitimate issue?

Thanks for your help!

Here's a sample app, followed by the warnings I'm seeing.

#include <boost/lambda/bind.hpp>
using boost::lambda::bind;
using boost::lambda::_1;

#include <vector>
#include <map>
#include <algorithm>

int main() {
    enum choice { select, reject };

    std::vector<long> questions;
    std::map<long, choice> answers;

    std::transform(questions.begin(), questions.end(), 
                   std::inserter(answers, answers.begin()), 
                   bind(std::make_pair<long, choice>, _1, select));

        return 0;
}

c:\boost\boost\lambda\detail\lambda_traits.hpp(389) : warning C4180: 
qualifier applied to function type has no meaning; ignored
        c:\boost\boost\lambda\detail\lambda_traits.hpp(458) : see 
reference to class template instantiation 
'boost::lambda::detail::bind_traits<T>' being compiled
        with
        [
            T=std::pair<long,main::choice> (long,main::choice)
        ]
        c:\temp\lambda_warning_test\lambda_warning_test.cpp(20) : see 
reference to class template instantiation 
'boost::lambda::detail::bind_tuple_mapper<T0,T1,T2,T3,T4,T5,T6,T7,T8,T9>' 
being compiled
        with
        [
            T0=std::pair<long,main::choice> (long,main::choice),
            T1=boost::lambda::placeholder1_type,
            T2=const main::choice,
            T3=boost::tuples::null_type,
            T4=boost::tuples::null_type,
            T5=boost::tuples::null_type,
            T6=boost::tuples::null_type,
            T7=boost::tuples::null_type,
            T8=boost::tuples::null_type,
            T9=boost::tuples::null_type
        ]

--------------------------------
John Wismar
john.wismar_at_[hidden]