ceph/src/arrow/cpp/src/arrow/util/type_fwd.h

   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 #pragma once
  19
  20 namespace arrow {
  21
  22 namespace internal {
  23 struct Empty;
  24 }  // namespace internal
  25
  26 template <typename T = internal::Empty>
  27 class WeakFuture;
  28 class FutureWaiter;
  29
  30 class TimestampParser;
  31
  32 namespace internal {
  33
  34 class Executor;
  35 class TaskGroup;
  36 class ThreadPool;
  37
  38 }  // namespace internal
  39
  40 struct Compression {
  41   /// \brief Compression algorithm
  42   enum type {
  43     UNCOMPRESSED,
  44     SNAPPY,
  45     GZIP,
  46     BROTLI,
  47     ZSTD,
  48     LZ4,
  49     LZ4_FRAME,
  50     LZO,
  51     BZ2,
  52     LZ4_HADOOP
  53   };
  54 };
  55
  56 namespace util {
  57 class Compressor;
  58 class Decompressor;
  59 class Codec;
  60 }  // namespace util
  61
  62 }  // namespace arrow