seq/reduce.h

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#ifndef GRPPI_SEQ_REDUCE_H
#define GRPPI_SEQ_REDUCE_H

#include "sequential_execution.h"

namespace grppi {

template <typename InputIt, typename Identity, typename Combiner>
auto reduce(sequential_execution & ex, InputIt first, InputIt last, 
            Identity identity,
            Combiner && combine_op)
{
  auto result = identity;
  while (first != last) {
    result = combine_op(result, *first);
    first++;
  }
  return result;
}

}

#endif