Function flip

src/backend/common/indexing_helpers.hpp:24–35

// of size original dims according to axes specified in flip
template<typename T>
static detail::Array<T> flip(const detail::Array<T>& in,
                             const std::array<bool, AF_MAX_DIMS> flip) {
    std::vector<af_seq> index(4, af_span);
    const af::dim4& dims = in.dims();

    for (int i = 0; i < AF_MAX_DIMS; ++i) {
        if (flip[i]) {
            index[i] = {static_cast<double>(dims[i] - 1), 0.0, -1.0};
        }
    }
    return createSubArray(in, index);
}

}  // namespace common
}  // namespace arrayfire