ceph/src/arrow/cpp/src/arrow/util/launder.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 #include <new>
  21
  22 namespace arrow {
  23 namespace internal {
  24
  25 #if __cplusplus >= 201703L
  26 using std::launder;
  27 #else
  28 template <class T>
  29 constexpr T* launder(T* p) noexcept {
  30   return p;
  31 }
  32 #endif
  33
  34 }  // namespace internal
  35 }  // namespace arrow