Boost.Range

Range Adaptors

`map_values`

rng | boost::adaptors::map_values

boost::make_map_value_range( rng )

Precondition: The value-type of the range is an instantiation of std::pair.
Postcondition: For all elements x in the returned range, x is the result of y.second where y is the corresponding element in the original range.
Range Category: SinglePassRange

Example

        #include <boost/range/adaptor/map.hpp>
        #include <boost/range/algorithm/copy.hpp>
        #include <boost/assign.hpp>
        #include <algorithm>
        #include <iostream>
        #include <map>
        #include <vector>
        
        int main(int argc, const char* argv[])
        {
            using namespace boost::assign;
            using namespace boost::adaptors;
            
            std::map<int,int> input;
            for (int i = 0; i < 10; ++i)
                input.insert(std::make_pair(i, i * 10));
                
            boost::copy(
                input | map_values,
                std::ostream_iterator<int>(std::cout, ","));
                
            return 0;
        }

This produces the output:
0,10,20,30,40,50,60,70,80,90