Improving flat containers interface.

base/containers/container_test_utils.h

-// Copyright 2017 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef BASE_CONTAINERS_CONTAINER_TEST_UTILS_H_
-#define BASE_CONTAINERS_CONTAINER_TEST_UTILS_H_
-
-// This file contains some helper classes for testing conainer behavior.
-
-#include "base/macros.h"
-
-namespace base {
-
-// A move-only class that holds an integer.
-class MoveOnlyInt {
- public:
-  explicit MoveOnlyInt(int data = 1) : data_(data) {}
-  MoveOnlyInt(MoveOnlyInt&& other) : data_(other.data_) { other.data_ = 0; }
-  MoveOnlyInt& operator=(MoveOnlyInt&& other) {
-    data_ = other.data_;
-    other.data_ = 0;
-    return *this;
-  }
-
-  friend bool operator==(const MoveOnlyInt& lhs, const MoveOnlyInt& rhs) {
-    return lhs.data_ == rhs.data_;
-  }
-
-  friend bool operator!=(const MoveOnlyInt& lhs, const MoveOnlyInt& rhs) {
-    return !operator==(lhs, rhs);
-  }
-
-  friend bool operator<(const MoveOnlyInt& lhs, const MoveOnlyInt& rhs) {
-    return lhs.data_ < rhs.data_;
-  }
-
-  friend bool operator>(const MoveOnlyInt& lhs, const MoveOnlyInt& rhs) {
-    return rhs < lhs;
-  }
-
-  friend bool operator<=(const MoveOnlyInt& lhs, const MoveOnlyInt& rhs) {
-    return !(rhs < lhs);
-  }
-
-  friend bool operator>=(const MoveOnlyInt& lhs, const MoveOnlyInt& rhs) {
-    return !(lhs < rhs);
-  }
-
-  int data() const { return data_; }
-
- private:
-  int data_;
-
-  DISALLOW_COPY_AND_ASSIGN(MoveOnlyInt);
-};
-
-}  // namespace base
-
-#endif  // BASE_CONTAINERS_CONTAINER_TEST_UTILS_H_