text: // Copyright (c) 2018 Baidu, Inc. All Rights Reserved.
  //
  // Licensed 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.
  
  #pragma once
  
  #include <functional>
  #include "expr_node.h"
  #include "fn_manager.h"
  
  namespace baikaldb {
  class ScalarFnCall : public ExprNode {
  public:
      virtual int init(const pb::ExprNode& node);
      virtual int type_inferer();
      virtual void children_swap();
      virtual int open();
      virtual ExprValue get_value(MemRow* row);
      pb::Function fn() {
          return _fn;
      }
      virtual void transfer_pb(pb::ExprNode* pb_node) {
          ExprNode::transfer_pb(pb_node);
          pb_node->mutable_fn()->CopyFrom(_fn);
      }
  private:
      pb::Function _fn;
      std::function<ExprValue(const std::vector<ExprValue>&)> _fn_call;
  };
  }
  
  /* vim: set ts=4 sw=4 sts=4 tw=100 */
  