libcxx/test/support/double_move_tracker.h

   1 //===----------------------------------------------------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #ifndef TEST_SUPPORT_DOUBLE_MOVE_TRACKER_H
  10 #define TEST_SUPPORT_DOUBLE_MOVE_TRACKER_H
  11
  12 #include <cassert>
  13
  14 #include "test_macros.h"
  15
  16 namespace support {
  17
  18 struct double_move_tracker {
  19   TEST_CONSTEXPR double_move_tracker() : moved_from_(false) {}
  20
  21   double_move_tracker(double_move_tracker const&) = default;
  22
  23   TEST_CONSTEXPR_CXX14 double_move_tracker(double_move_tracker&& other) : moved_from_(false) {
  24     assert(!other.moved_from_);
  25     other.moved_from_ = true;
  26   }
  27
  28   double_move_tracker& operator=(double_move_tracker const&) = default;
  29
  30   TEST_CONSTEXPR_CXX14 double_move_tracker& operator=(double_move_tracker&& other) {
  31     assert(!other.moved_from_);
  32     other.moved_from_ = true;
  33     moved_from_       = false;
  34     return *this;
  35   }
  36
  37 private:
  38   bool moved_from_;
  39 };
  40
  41 } // namespace support
  42
  43 #endif // TEST_SUPPORT_DOUBLE_MOVE_TRACKER_H