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Subject [GitHub] zheng-da commented on a change in pull request #10451: [MXNET-432] Add Foreach
Date Sun, 17 Jun 2018 00:38:19 GMT
zheng-da commented on a change in pull request #10451: [MXNET-432] Add Foreach
URL: https://github.com/apache/incubator-mxnet/pull/10451#discussion_r195915304
 
 

 ##########
 File path: src/operator/subgraph_op_common.h
 ##########
 @@ -0,0 +1,104 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+#ifndef MXNET_OPERATOR_SUBGRAPH_OP_COMMON_H_
+#define MXNET_OPERATOR_SUBGRAPH_OP_COMMON_H_
+
+#include <mxnet/io.h>
+#include <mxnet/base.h>
+#include <mxnet/op_attr_types.h>
+#include <vector>
+#include "../imperative/cached_op.h"
+#include "../imperative/imperative_utils.h"
+
+namespace mxnet {
+namespace op {
+
+/*
+ * Infer the data types of inputs and outputs of an operator that contains a
+ * subgraph.
+ */
+bool InferSubgraphDataType(const nnvm::Symbol &subgraph, std::vector<int> *in_type,
+                           std::vector<int> *out_type);
+
+/*
+ * Infer the storage types of inputs and outputs of an operator that contains a
+ * subgraph.
+ */
+bool InferSubgraphStorage(const nnvm::Symbol &subgraph,
+                          const int dev_mask,
+                          DispatchMode* dispatch_mode,
+                          std::vector<int> *in_attrs,
+                          std::vector<int> *out_attrs);
+
+/*
+ * Infer the storage types of inputs and outputs of the backward computation of
+ * an operator that contains a subgraph.
+ */
+bool InferSubgraphBackwardStorage(const nnvm::Symbol &subgraph,
+                                  const int dev_mask,
+                                  DispatchMode* dispatch_mode,
+                                  std::vector<int> *in_attrs,
+                                  std::vector<int> *out_attrs);
+
+/*
+ * This contains the states for running a loop and provides methods
+ * of running the subgraph computation for an iteration.
+ */
+class LoopState {
 
 Review comment:
   it's supposed to be shared by while loop.

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