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value_type of the range is convertible
                to the argument type of fun.
              x in the returned
                range, x is the result
                of fun(y)
                where y is the corresponding
                element in the original range.
              fun might throw.
              boost::transformed_range<decltype(rng)>
              rng.
              
#include <boost/range/adaptor/transformed.hpp> #include <boost/range/algorithm/copy.hpp> #include <boost/assign.hpp> #include <iterator> #include <iostream> #include <vector> struct double_int { typedef int result_type; int operator()(int x) const { return x * 2; } }; int main(int argc, const char* argv[]) { using namespace boost::adaptors; using namespace boost::assign; std::vector<int> input; input += 1,2,3,4,5,6,7,8,9,10; boost::copy( input | transformed(double_int()), std::ostream_iterator<int>(std::cout, ",")); return 0; }
This would produce the output:
2,4,6,8,10,12,14,16,18,20,