Revert "potential windows fix"

This reverts commit 0be33ffa.

csrc/cpu/reducer.h

@@ -40,8 +40,8 @@ const std::map<std::string, ReductionType> reduce2REDUCE = {
     }                                                                          \
   }()
 
-template <typename scalar_t> struct Reducer {
-  static inline scalar_t init(ReductionType REDUCE) {
+template <typename scalar_t, ReductionType REDUCE> struct Reducer {
+  static inline scalar_t init() {
     if (REDUCE == MUL || REDUCE == DIV)
       return (scalar_t)1;
     else if (REDUCE == MIN)
@@ -52,8 +52,8 @@ template <typename scalar_t> struct Reducer {
       return (scalar_t)0;
   }
 
-  static inline void update(ReductionType REDUCE, scalar_t *val,
-                            scalar_t new_val, int64_t *arg, int64_t new_arg) {
+  static inline void update(scalar_t *val, scalar_t new_val, int64_t *arg,
+                            int64_t new_arg) {
     if (REDUCE == SUM || REDUCE == MEAN)
       *val = *val + new_val;
     else if (REDUCE == MUL)
@@ -67,9 +67,8 @@ template <typename scalar_t> struct Reducer {
     }
   }
 
-  static inline void write(ReductionType REDUCE, scalar_t *address,
-                           scalar_t val, int64_t *arg_address, int64_t arg,
-                           int count) {
+  static inline void write(scalar_t *address, scalar_t val,
+                           int64_t *arg_address, int64_t arg, int count) {
     if (REDUCE == SUM || REDUCE == MUL || REDUCE == DIV)
       *address = val;
     else if (REDUCE == MEAN)

csrc/cpu/scatter_cpu.cpp

@@ -61,22 +61,22 @@ scatter_cpu(torch::Tensor src, torch::Tensor index, int64_t dim,
     int64_t i, idx;
     AT_DISPATCH_REDUCTION_TYPES(reduce, [&] {
       if (!optional_out.has_value())
-        out.fill_(Reducer<scalar_t>::init(REDUCE));
+        out.fill_(Reducer<scalar_t, REDUCE>::init());
 
       for (auto b = 0; b < B; b++) {
         for (auto e = 0; e < E; e++) {
           for (auto k = 0; k < K; k++) {
             i = b * E * K + e * K + k;
             idx = index_info.data[IndexToOffset<int64_t>::get(i, index_info)];
-            Reducer<scalar_t>::update(
-                REDUCE, out_data + b * N * K + idx * K + k, src_data[i],
+            Reducer<scalar_t, REDUCE>::update(
+                out_data + b * N * K + idx * K + k, src_data[i],
                 arg_out_data + b * N * K + idx * K + k, e);
           }
         }
       }
 
       if (!optional_out.has_value() && (REDUCE == MIN || REDUCE == MAX))
-        out.masked_fill_(out == Reducer<scalar_t>::init(REDUCE), (scalar_t)0);
+        out.masked_fill_(out == Reducer<scalar_t, REDUCE>::init(), (scalar_t)0);
     });
   });
 

csrc/cpu/segment_coo_cpu.cpp

@@ -72,7 +72,7 @@ segment_coo_cpu(torch::Tensor src, torch::Tensor index,
     int64_t idx, next_idx, row_start;
     AT_DISPATCH_REDUCTION_TYPES(reduce, [&] {
       if (!optional_out.has_value())
-        out.fill_(Reducer<scalar_t>::init(REDUCE));
+        out.fill_(Reducer<scalar_t, REDUCE>::init());
       if (REDUCE == MEAN)
         count_data = arg_out.value().data_ptr<scalar_t>();
 
@@ -87,13 +87,13 @@ segment_coo_cpu(torch::Tensor src, torch::Tensor index,
         for (auto e = 0; e < E; e++) {
 
           for (auto k = 0; k < K; k++)
-            Reducer<scalar_t>::update(
-                REDUCE, &vals[k], src_data[b * E * K + e * K + k], &args[k], e);
+            Reducer<scalar_t, REDUCE>::update(
+                &vals[k], src_data[b * E * K + e * K + k], &args[k], e);
 
           if (e == E - 1) {
             for (auto k = 0; k < K; k++)
-              Reducer<scalar_t>::write(
-                  REDUCE, out_data + b * N * K + idx * K + k, vals[k],
+              Reducer<scalar_t, REDUCE>::write(
+                  out_data + b * N * K + idx * K + k, vals[k],
                   arg_out_data + b * N * K + idx * K + k, args[k],
                   e + 1 - row_start);
             if (REDUCE == MEAN)
@@ -104,8 +104,8 @@ segment_coo_cpu(torch::Tensor src, torch::Tensor index,
 
             if (idx != next_idx) {
               for (auto k = 0; k < K; k++) {
-                Reducer<scalar_t>::write(
-                    REDUCE, out_data + b * N * K + idx * K + k, vals[k],
+                Reducer<scalar_t, REDUCE>::write(
+                    out_data + b * N * K + idx * K + k, vals[k],
                     arg_out_data + b * N * K + idx * K + k, args[k],
                     e + 1 - row_start);
 
@@ -121,7 +121,7 @@ segment_coo_cpu(torch::Tensor src, torch::Tensor index,
         }
       }
       if (!optional_out.has_value() && (REDUCE == MIN || REDUCE == MAX))
-        out.masked_fill_(out == Reducer<scalar_t>::init(REDUCE), (scalar_t)0);
+        out.masked_fill_(out == Reducer<scalar_t, REDUCE>::init(), (scalar_t)0);
 
       if (REDUCE == MEAN)
         arg_out.value().clamp_(1);

csrc/cpu/segment_csr_cpu.cpp

@@ -68,15 +68,15 @@ segment_csr_cpu(torch::Tensor src, torch::Tensor indptr,
 
         offset = (n / (indptr.size(-1) - 1)) * E * K;
         for (auto k = 0; k < K; k++)
-          vals[k] = Reducer<scalar_t>::init(REDUCE);
+          vals[k] = Reducer<scalar_t, REDUCE>::init();
 
         for (auto e = row_start; e < row_end; e++)
           for (auto k = 0; k < K; k++)
-            Reducer<scalar_t>::update(
-                REDUCE, &vals[k], src_data[offset + e * K + k], &args[k], e);
+            Reducer<scalar_t, REDUCE>::update(
+                &vals[k], src_data[offset + e * K + k], &args[k], e);
 
         for (auto k = 0; k < K; k++)
-          Reducer<scalar_t>::write(REDUCE, out_data + n * K + k, vals[k],
+          Reducer<scalar_t, REDUCE>::write(out_data + n * K + k, vals[k],
                                            arg_out_data + n * K + k, args[k],
                                            row_end - row_start);
       }