[BE] Use nested namespaces for sparse (pytorch#117415)

C++17 is fu

Pull Request resolved: pytorch#117415
Approved by: https://github.com/Skylion007

Author: malfet

aten/src/ATen/native/sparse/ParamUtils.h

@@ -4,8 +4,7 @@
 #include <ATen/TensorUtils.h>
 #include <tuple>
 
-namespace at {
-namespace native {
+namespace at::native {
 
 TORCH_API std::tuple<Tensor, Tensor, int64_t> softmax_sparse_input_preprocessing(
     const Tensor& input_,
@@ -20,5 +19,4 @@ TORCH_API std::tuple<Tensor, Tensor, Tensor, int64_t> softmax_backward_sparse_in
     const Tensor& input_,
     CheckedFrom function_name);
 
-} // namespace native
-} // namespace at
+} // namespace at::native

aten/src/ATen/native/sparse/SparseBinaryOpIntersectionCommon.h

@@ -23,8 +23,7 @@
 #define NAME "sparse_binary_op_intersection_cpu"
 #endif
 
-namespace at {
-namespace native {
+namespace at::native {
 
 namespace {
 
@@ -478,4 +477,4 @@ void _sparse_binary_op_intersection_kernel_out(
 
 } // anonymous namespace
 
-}} // at::native
+} // at::native

aten/src/ATen/native/sparse/SparseBlas.h

@@ -5,9 +5,7 @@
 #include <ATen/Tensor.h>
 #include <ATen/core/Scalar.h>
 
-namespace at {
-namespace native {
-namespace sparse {
+namespace at::native::sparse {
 
 TORCH_API void sparse_sampled_addmm_check_inputs(
     const Tensor& self,
@@ -17,6 +15,4 @@ TORCH_API void sparse_sampled_addmm_check_inputs(
     const Scalar& alpha,
     const Tensor& result);
 
-} // namespace sparse
-} // namespace native
-} // namespace at
+} // namespace at::native::sparse

aten/src/ATen/native/sparse/SparseBlasImpl.h

@@ -3,10 +3,7 @@
 #include <ATen/Tensor.h>
 #include <ATen/core/Scalar.h>
 
-namespace at {
-namespace native {
-namespace sparse {
-namespace impl {
+namespace at::native::sparse::impl {
 
 TORCH_API Tensor& _compressed_row_strided_mm_out(
     const Tensor& compressed_row_sparse,
@@ -45,7 +42,4 @@ void triangular_solve_out_sparse_csr(
     bool unitriangular);
 
 } // namespace cpu
-} // namespace impl
-} // namespace sparse
-} // namespace native
-} // namespace at
+} // namespace at::native::sparse::impl

aten/src/ATen/native/sparse/SparseCsrTensorMath.h

@@ -6,10 +6,7 @@
 #include <ATen/native/ReductionType.h>
 #include <ATen/native/cpu/SpmmReduceKernel.h>
 
-namespace at {
-namespace native {
-namespace sparse {
-namespace impl {
+namespace at::native::sparse::impl {
 
 // Returns true if all entries of self are zero
 // TODO: This has potential to be a generic helper
@@ -84,7 +81,4 @@ inline void check_sparse_mm_reduce_impl_inputs(
   check_dim_size(other, 2, 0, self.size(1));
 }
 
-}
-}
-}
-}
+} // at::native::sparse::impl

aten/src/ATen/native/sparse/SparseStubs.h

@@ -22,6 +22,5 @@ DECLARE_DISPATCH(sparse_mask_projection_out_fn, sparse_mask_projection_out_stub)
 using flatten_indices_fn = Tensor (*)(const Tensor& indices, IntArrayRef size);
 DECLARE_DISPATCH(flatten_indices_fn, flatten_indices_stub);
 
-}
-
-}
+} // namespace native
+} // namespace at

aten/src/ATen/native/sparse/SparseTensorMath.h

@@ -2,12 +2,12 @@
 
 #include <ATen/native/SparseTensorUtils.h>
 
-namespace at { namespace native {
+namespace at::native {
 
 TORCH_API sparse::SparseTensor& mul_out_sparse_scalar(sparse::SparseTensor& r, const sparse::SparseTensor& t, const Scalar& value);
 TORCH_API sparse::SparseTensor& mul_out_sparse_zerodim(sparse::SparseTensor& r, const sparse::SparseTensor& t, const Tensor& value);
 TORCH_API sparse::SparseTensor& _mul_dense_sparse_out(const Tensor& d, const Tensor& s, Tensor& res);
 TORCH_API sparse::SparseTensor& _mul_sparse_sparse_zero_dim_out(const Tensor& zero_dim, const Tensor& other, Tensor& res);
 TORCH_API sparse::SparseTensor& _mul_sparse_sparse_out(const Tensor& x, const Tensor& y, Tensor& res);
 
-}}
+} // namespace at::native

aten/src/ATen/native/sparse/ValidateCompressedIndicesCommon.h

@@ -24,8 +24,7 @@
 
 #define INVARIANT_CHECK_FUNC_API static INLINE FUNCAPI void
 
-namespace at {
-namespace native {
+namespace at::native {
 
 namespace {
 
@@ -412,5 +411,4 @@ void validate_compressed_sparse_indices_kernel(
 
 } // namespace
 
-} // namespace native
-} // namespace at
+} // namespace at::native

aten/src/ATen/native/sparse/cuda/SoftMax.cu

@@ -61,8 +61,7 @@
 
 #include <c10/cuda/CUDAMathCompat.h>
 
-namespace at {
-namespace native {
+namespace at::native {
 namespace {
 
 // Number of threads in a block given an input size up to MAX_BLOCK_SIZE
@@ -669,5 +668,4 @@ Tensor log_softmax_backward_sparse_cuda(
   return grad_input;
 }
 
-} // namespace native
-} // namespace at
+} // namespace at::native

aten/src/ATen/native/sparse/cuda/SparseBlas.cpp

@@ -24,8 +24,7 @@
 
 #include <c10/util/MaybeOwned.h>
 
-namespace at {
-namespace native {
+namespace at::native {
 
 /*
   Computes `result` <- α*(A @ B) * spy(C) + β*C, where spy(C) is the sparsity pattern matrix of C.
@@ -285,5 +284,4 @@ std::tuple<Tensor&, Tensor&> triangular_solve_out_sparse_csr_cuda(
   return std::tuple<Tensor&, Tensor&>(X, clone_A);
 }
 
-} // namespace native
-} // namespace at
+} // namespace at::native