Re: [Boost-users] [bind]

"Sebastian Weber" <sebastian.weber@physik.tu-darmstadt.de> wrote

I'm about to explore the power of boost::bind, but I am still a beginner. Maybe the question is rather stupid, but the following code does not compile and I do not understand why:

typedef std::vector<std::size_t> data_t;

data_t dataVec;

... populate dataVec ...

std::size_t shiftIndex = 3;

boost::function<std::size_t& (std::size_t)> shiftedData = boost::bind(&data_t::at, &dataVec, _1 - shiftIndex);

The following should work: boost::function<std::size_t& (std::size_t)> shiftedData = boost::bind(&data_t::at, &dataVec, boost::bind(std::minus<size_t>(), _1, shiftIndex)); HTH, Arkadiy