61 lines
1.3 KiB
C++
61 lines
1.3 KiB
C++
/**
|
|
* Copyright (c) 2015-present, Facebook, Inc.
|
|
*
|
|
* This source code is licensed under the MIT license found in the
|
|
* LICENSE file in the root directory of this source tree.
|
|
*/
|
|
|
|
#include "Sealable.h"
|
|
|
|
#include <stdexcept>
|
|
|
|
namespace facebook {
|
|
namespace react {
|
|
|
|
/*
|
|
* Note:
|
|
* We must explictly implement all *the rule of five* methods because:
|
|
* 1. Using `std::atomic` behind `sealed_` implicitly deletes default
|
|
* constructors;
|
|
* 2. We have to establish behaviour where any new cloned or moved instances
|
|
* of the object lose `sealed` flag.
|
|
*
|
|
* See more about the rule of three/five/zero:
|
|
* http://en.cppreference.com/w/cpp/language/rule_of_three
|
|
*/
|
|
|
|
Sealable::Sealable(): sealed_(false) {}
|
|
|
|
Sealable::Sealable(const Sealable& other): sealed_(false) {};
|
|
|
|
Sealable::Sealable(Sealable&& other) noexcept: sealed_(false) {};
|
|
|
|
Sealable::~Sealable() noexcept {};
|
|
|
|
Sealable& Sealable::operator= (const Sealable& other) {
|
|
ensureUnsealed();
|
|
return *this;
|
|
}
|
|
|
|
Sealable& Sealable::operator= (Sealable&& other) noexcept {
|
|
ensureUnsealed();
|
|
return *this;
|
|
};
|
|
|
|
void Sealable::seal() const {
|
|
sealed_ = true;
|
|
}
|
|
|
|
bool Sealable::getSealed() const {
|
|
return sealed_;
|
|
}
|
|
|
|
void Sealable::ensureUnsealed() const {
|
|
if (sealed_) {
|
|
throw std::runtime_error("Attempt to mutate a sealed object.");
|
|
}
|
|
}
|
|
|
|
} // namespace react
|
|
} // namespace facebook
|