pass.h

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 * 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
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#ifndef NNVM_PASS_H_
#define NNVM_PASS_H_

#include <vector>
#include <functional>
#include "base.h"
#include "graph.h"

namespace nnvm {

typedef std::function<Graph (Graph src)> PassFunction;

Graph ApplyPasses(Graph src,
                  const std::vector<std::string>& passes);

inline Graph ApplyPass(Graph src, const std::string& pass) {
  return ApplyPasses(src, {pass});
}


struct PassFunctionReg
    : public dmlc::FunctionRegEntryBase<PassFunctionReg,
                                        PassFunction> {
  bool change_graph{false};
  std::vector<std::string> op_attr_dependency;
  std::vector<std::string> graph_attr_dependency;
  std::vector<std::string> graph_attr_targets;
  PassFunctionReg& set_change_graph(bool v) {  // NOLINT(*)
    change_graph = v;
    return *this;
  }
  PassFunctionReg& provide_graph_attr(const std::string& attr_name) {  // NOLINT(*)
    graph_attr_targets.push_back(attr_name);
    return *this;
  }
  PassFunctionReg& depend_op_attr(const std::string& attr_name) {  // NOLINT(*)
    op_attr_dependency.push_back(attr_name);
    return *this;
  }
  PassFunctionReg& depend_graph_attr(const std::string& attr_name) {  // NOLINT(*)
    graph_attr_dependency.push_back(attr_name);
    return *this;
  }
};

#define NNVM_REGISTER_PASS(name)                                     \
  DMLC_REGISTRY_REGISTER(::nnvm::PassFunctionReg, PassFunctionReg, name)

}  // namespace nnvm

#endif  // NNVM_PASS_H_