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#pragma once

#include <torch/extension.h>
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#if (defined __cpp_inline_variables) || __cplusplus >= 201703L
#define SCATTER_INLINE_VARIABLE inline
#else
#ifdef _MSC_VER
#define SCATTER_INLINE_VARIABLE __declspec(selectany)
#else
#define SCATTER_INLINE_VARIABLE __attribute__((weak))
#endif
#endif

namespace scatter {
int64_t cuda_version() noexcept;

namespace detail {
SCATTER_INLINE_VARIABLE int64_t _cuda_version = cuda_version();
} // namespace detail
} // namespace scatter
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torch::Tensor scatter_sum(torch::Tensor src, torch::Tensor index, int64_t dim,
                          torch::optional<torch::Tensor> optional_out,
                          torch::optional<int64_t> dim_size);

torch::Tensor scatter_mean(torch::Tensor src, torch::Tensor index, int64_t dim,
                           torch::optional<torch::Tensor> optional_out,
                           torch::optional<int64_t> dim_size);

std::tuple<torch::Tensor, torch::Tensor>
scatter_min(torch::Tensor src, torch::Tensor index, int64_t dim,
            torch::optional<torch::Tensor> optional_out,
            torch::optional<int64_t> dim_size);

std::tuple<torch::Tensor, torch::Tensor>
scatter_max(torch::Tensor src, torch::Tensor index, int64_t dim,
            torch::optional<torch::Tensor> optional_out,
            torch::optional<int64_t> dim_size);

torch::Tensor segment_sum_coo(torch::Tensor src, torch::Tensor index,
                              torch::optional<torch::Tensor> optional_out,
                              torch::optional<int64_t> dim_size);

torch::Tensor segment_mean_coo(torch::Tensor src, torch::Tensor index,
                               torch::optional<torch::Tensor> optional_out,
                               torch::optional<int64_t> dim_size);

std::tuple<torch::Tensor, torch::Tensor>
segment_min_coo(torch::Tensor src, torch::Tensor index,
                torch::optional<torch::Tensor> optional_out,
                torch::optional<int64_t> dim_size);

std::tuple<torch::Tensor, torch::Tensor>
segment_max_coo(torch::Tensor src, torch::Tensor index,
                torch::optional<torch::Tensor> optional_out,
                torch::optional<int64_t> dim_size);

torch::Tensor gather_coo(torch::Tensor src, torch::Tensor index,
                         torch::optional<torch::Tensor> optional_out);

torch::Tensor segment_sum_csr(torch::Tensor src, torch::Tensor indptr,
                              torch::optional<torch::Tensor> optional_out);

torch::Tensor segment_mean_csr(torch::Tensor src, torch::Tensor indptr,
                               torch::optional<torch::Tensor> optional_out);

std::tuple<torch::Tensor, torch::Tensor>
segment_min_csr(torch::Tensor src, torch::Tensor indptr,
                torch::optional<torch::Tensor> optional_out);

std::tuple<torch::Tensor, torch::Tensor>
segment_max_csr(torch::Tensor src, torch::Tensor indptr,
                torch::optional<torch::Tensor> optional_out);

torch::Tensor gather_csr(torch::Tensor src, torch::Tensor indptr,
                         torch::optional<torch::Tensor> optional_out);