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Boost.Range |
transformed
rng | boost::adaptors::transformed( fun )boost::make_transformed_range( rng, 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.
#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