c++ - read sequence of hex values from ifstream using std::copy -

consider file containing sequence of integers expressed in hex notation. can stream them in this:

using namespace std; ifstream infile(fname); unsigned int i; vector<unsigned int> vals; while (infile >> std::hex >> i){     vals.push_back(i); }

what if want same thing istream_iterator?

/// borks on hex: copy(istream_iterator<unsigned int>(infile),     istream_iterator<unsigned int>(), back_inserter(ref_data));

is there way tell istream_iterator how assume hex notation?

same way:

copy(istream_iterator<unsigned int>(infile >> std::hex),      istream_iterator<unsigned int>(),      back_inserter(ref_data));

Macro