Function sum

src/api/cpp/reduce.cpp:17–21

namespace af {
array sum(const array &in, const int dim) {
    af_array out = 0;
    AF_THROW(af_sum(&out, in.get(), getFNSD(dim, in.dims())));
    return array(out);
}

array sum(const array &in, const int dim, const double nanval) {
    af_array out = 0;