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45 lines
1000 B
Markdown
45 lines
1000 B
Markdown
# Array::Array() - 拷贝/移动构造
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```cpp
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Array(const Array& other);
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Array(Array&& other) noexcept;
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```
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拷贝或移动构造一个新数组。
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**拷贝构造：**
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- 分配与 `other` 相同容量的内存
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- 拷贝 `other` 中所有元素
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**移动构造：**
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- 接管 `other` 的所有资源（数据指针、容量、大小）
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- 将 `other` 置为空状态（`m_data = nullptr, m_size = 0, m_capacity = 0`）
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- 不拷贝、不移动任何元素数据，性能 O(1)
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**参数：**
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- `other` - 源数组
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**异常：**
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- 拷贝构造：元素拷贝可能抛出异常
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- 移动构造：`noexcept`，不抛出异常
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**线程安全：** ❌ 构造期间不可并发访问
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**示例：**
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```cpp
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Containers::Array<int> arr1 = {1, 2, 3};
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// 拷贝构造
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Containers::Array<int> arr2(arr1); // arr2 = {1, 2, 3}
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// 移动构造
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Containers::Array<int> arr3(std::move(arr1));
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// arr3 = {1, 2, 3}
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// arr1 现在为空，Size() == 0
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```
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## 相关文档
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- [Array 总览](array.md) - 返回类总览
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