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### Header <boost/algorithm/cxx17/transform_reduce.hpp>

Combine the (transformed) elements of a sequence (or two) into a single value.

Marshall Clow

    namespace boost {
      namespace algorithm {
        template<typename InputIterator1, typename InputIterator2, typename T,
                 typename BinaryOperation1, typename BinaryOperation2>
          T transform_reduce(InputIterator1 first1, InputIterator1 last1,
                             InputIterator2 first2, T init,
                             BinaryOperation1 bOp1, BinaryOperation2 bOp2);
        template<typename InputIterator, typename T, typename BinaryOperation,
                 typename UnaryOperation>
          T transform_reduce(InputIterator first, InputIterator last, T init,
                             BinaryOperation bOp, UnaryOperation uOp);
        template<typename InputIterator1, typename InputIterator2, typename T>
          T transform_reduce(InputIterator1 first1, InputIterator1 last1,
                             InputIterator2 first2, T init);
      }
    }