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

On 12/18/06, john.wismar@autozone.com wrote:

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 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 answers;

std::transform(questions.begin(), questions.end(), std::inserter(answers, answers.begin()), bind(std::make_pair, _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) ] c:\temp\lambda_warning_test\lambda_warning_test.cpp(20) : see reference to class template instantiation 'boost::lambda::detail::bind_tuple_mapper' being compiled with [ T0=std::pair (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@autozone.com

Was there ever any resolution on this? I'm seeing the same thing, only in my case T = void (const boost::xtime &) (ie function taking boost::xtime) I understand it probably isn't an important warning, but it is annoying. Tony