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## Function template transform_if

boost::compute::transform_if

## Synopsis

    // In header: <boost/compute/algorithm/transform_if.hpp>

    template<typename InputIterator, typename OutputIterator,
             typename UnaryFunction, typename Predicate>
      OutputIterator
      transform_if(InputIterator first, InputIterator last, OutputIterator result,
                   UnaryFunction function, Predicate predicate,
                   command_queue & queue = system::default_queue());

## Description

Copies each element in the range [`first`, `last`) for which `predicate` returns `true` to the range beginning at `result`.

Space complexity: O(2n)