ceph/src/arrow/cpp/src/gandiva/literal_holder.cc

   1 // Licensed to the Apache Software Foundation (ASF) under one
   2 // or more contributor license agreements.  See the NOTICE file
   3 // distributed with this work for additional information
   4 // regarding copyright ownership.  The ASF licenses this file
   5 // to you under the Apache License, Version 2.0 (the
   6 // "License"); you may not use this file except in compliance
   7 // with the License.  You may obtain a copy of the License at
   8 //
   9 //   http://www.apache.org/licenses/LICENSE-2.0
  10 //
  11 // Unless required by applicable law or agreed to in writing,
  12 // software distributed under the License is distributed on an
  13 // "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
  14 // KIND, either express or implied.  See the License for the
  15 // specific language governing permissions and limitations
  16 // under the License.
  17
  18 #include <sstream>
  19
  20 #include "gandiva/literal_holder.h"
  21
  22 namespace gandiva {
  23
  24 namespace {
  25
  26 template <typename OStream>
  27 struct LiteralToStream {
  28   OStream& ostream_;
  29
  30   template <typename Value>
  31   void operator()(const Value& v) {
  32     ostream_ << v;
  33   }
  34 };
  35
  36 }  // namespace
  37
  38 std::string ToString(const LiteralHolder& holder) {
  39   std::stringstream ss;
  40   LiteralToStream<std::stringstream> visitor{ss};
  41   ::arrow::util::visit(visitor, holder);
  42   return ss.str();
  43 }
  44
  45 }  // namespace gandiva