如何在Swift中访问包含可变大小数组的C结构？

// C结构定义
typedef struct {
    int size;
    int* array;
} CStruct;

// Swift结构定义
struct SwiftStruct {
    var size: Int
    var array: UnsafeMutableBufferPointer<Int>?
}

// 访问C结构的函数
func accessCStruct(cStruct: inout CStruct) {
    // 将C结构的内存分配给Swift结构
    withUnsafeMutablePointer(to: &cStruct) { cStructPointer in
        // 将C结构的指针绑定到Swift结构的可变大小数组字段上
        let swiftStruct = cStructPointer.withMemoryRebound(to: SwiftStruct.self, capacity: 1) { swiftStructPointer in
            return swiftStructPointer.pointee
        }
        
        // 在Swift中访问和操作可变大小数组
        if let array = swiftStruct.array {
            for i in 0..<swiftStruct.size {
                array[i] = i
            }
        }
    }
}

// 示例用法
var cStruct = CStruct(size: 5, array: nil)
accessCStruct(cStruct: &cStruct)
print(cStruct.array) // 输出：Optional(UnsafeMutableBufferPointer(start: 0x0000000102000000, count: 5))