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Boost.Range |
transformedrng | 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