id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
12052	Boost 1.60 any.hpp error: 'if_' in namespace 'boost::mpl' does not name a template type	Thomas Milotti <thomas.milotti@…>	Antony Polukhin	"Linux 3.19.0-51-generic #58-Ubuntu SMP Fri Feb 26 21:22:26 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux
Ubuntu 15.04

Boost 1.60

#include <iostream>
#include <boost/any.hpp>

int main()
{
    boost::any a = 1;
    std::cout << boost::any_cast<int>(a) << '\n';
    a = 3.14;
    std::cout << boost::any_cast<double>(a) << '\n';
    a = true;
    std::cout << std::boolalpha << boost::any_cast<bool>(a) << '\n';
}

This code generates a compilation error:

/usr/include/boost/any.hpp: In function ‘ValueType boost::any_cast(boost::any&)’:
/usr/include/boost/any.hpp:292:52: error: ‘if_’ in namespace ‘boost::mpl’ does not name a template type
         typedef BOOST_DEDUCED_TYPENAME boost::mpl::if_<
                                                    ^
/usr/include/boost/any.hpp:292:55: error: expected unqualified-id before ‘<’ token
         typedef BOOST_DEDUCED_TYPENAME boost::mpl::if_<
                                                       ^
/usr/include/boost/any.hpp:298:28: error: ‘ref_type’ does not name a type
         return static_cast<ref_type>(*result);
"	Bugs	closed	To Be Determined	any	Boost 1.60.0	Problem	worksforme	any.hpp