Boost.Range

Range Adaptors


transformed

rng | boost::adaptors::transformed( fun )
boost::make_transformed_range( rng, fun )

Example

        #include <boost/range/adaptor/transformed.hpp>
        #include <boost/range/algorithm/copy.hpp>
        #include <boost/range/assign.hpp>
        #include <algorithm>
        #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 produces the output:
2,4,6,8,10,12,14,16,18,20


(C) Copyright Neil Groves 2009 (C) Copyright Thorsten Ottosen 2003-2004