## Function template apply

boost::cnv::apply — Boost.Convert deployment interface with algorithms.

## Synopsis

    // In header: <boost/convert.hpp>

    template<typename TypeOut, typename TypeIn, typename Converter>
      reference< Converter, TypeOut, TypeIn > apply(Converter const & cnv);

## Description

For example,

    std::array<char const*, 3> strs = {{ " 5", "0XF", "not an int" }};
    std::vector<int>           ints;
    boost::cnv::cstream         cnv;

    cnv(std::hex)(std::skipws);

    std::transform(
        strs.begin(),
        strs.end(),
        std::back_inserter(ints),
        boost::cnv::apply<int>(std::cref(cnv)).value_or(-1));