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# HashMap::Copy/Move 构造
```cpp
HashMap(const HashMap& other);
HashMap(HashMap&& other) noexcept;
```
拷贝构造和移动构造。
**参数:**
- `other` - 源哈希表(拷贝版本为 `const` 引用,移动版本为右值引用)
**返回:** 无(构造函数)
**复杂度:**
- 拷贝构造O(m_bucketCount + other.m_size)
- 移动构造O(m_bucketCount),移动构造需要遍历所有桶以重新建立桶的指针关系
**线程安全:** ❌ 非线程安全
**异常:**
**示例:**
```cpp
XCEngine::Containers::HashMap<int, std::string> map1;
map1.Insert(1, "hello");
map1.Insert(2, "world");
XCEngine::Containers::HashMap<int, std::string> map2(map1); // 拷贝构造
XCEngine::Containers::HashMap<int, std::string> map3(std::move(map1)); // 移动构造map1 在此调用后状态不确定
```
## 相关文档
- [HashMap 总览](hashmap.md) - 返回类总览
- [operator=](operator-assign.md) - 赋值运算符