objc-c 嵌入C

Question

inline static void* SteMakeWeakRef(id obj) {
    
    __weak id weakValue = obj;
    void* blockPoint = (__bridge_retained void*)^{return weakValue;};
    return blockPoint;

}

/** 测试代码 **/
   id(^block)(void);
    NSString* value = @"oldStr";
    block = (__bridge_transfer id)(SteMakeWeakRef(value));
    value = @"newStr";
    NSLog(@"%@",block());
    //执行结果：oldStr

把上面的__weak 去掉结果也是相同的.
想问下有没有其他方法测试 被block包起来的 weakValue是否是弱引用?